ЭЛЕКТРИЧЕСКАЯ УСТАНОВКА

1. Электрическая установка (1), содержащая электрическую сеть (2) распределения энергии и/или по меньшей мере один первый электрический прибор (3), отличающаяся тем, что на и/или в электрической сети (2) распределения энергии и/или по меньшей мере одном первом электрическом приборе (3) размещены средства (4) для определения источника неисправности посредством выделения источника вслепую, предпочтительно для определения местоположения по меньшей мере одного первого электрического источника неисправности, в частности по меньшей мере одного первого источника тока повреждения и/или одной первой зоны перегрузки. ! 2. Электрическая установка (1) по п.1, отличающаяся тем, что средства (4) для определения источника неисправности посредством выделения источника вслепую включают в себя по меньшей мере один первый сенсор (5) и один второй сенсор (6) для детектирования по меньшей мере одного первого физического параметра, который индуцирован электрической установкой (1) или на который может оказывать влияние электрическая установка (1). ! 3. Электрическая установка (1) по п.1 или 2, отличающаяся тем, что средства (4) для определения источника неисправности посредством выделения источника вслепую включают в себя по меньшей мере одно устройство (7) определения неисправностей для определения источника неисправности в электрической установке (1) посредством выделения источника вслепую. ! 4. Электрическая установка (1) по п.3, причем электрическая сеть (2) распределения энергии имеет по меньшей мере одну первую электрическую частичную сеть (8) и одну вторую электрическую частичную сеть (9) для подключения электрических приборов (3), причем перва РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2011 101 533 (13) A (51) МПК H02H 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (71) Заявитель(и): ИНТОН ГМБХ (AT) (21)(22) Заявка: 2011101533/07, 30.04.2009 Приоритет(ы): (30) Конвенционный приоритет: 18.06.2008 AT A975/2008 (72) Автор(ы): КОХ Михель (AT) (85 ...

Gegen Störlichtbögen gesicherte Schaltanlage zur Verteilung elektrischer Energie

DEVICE FOR THE TEMPERATURE MONITORING OF A POLYPHASE CURRENT COIL OF AN ELECTRICAL MACHINE

FEHLERSTROMSCHUTZSCHALTER

A residual-current circuit breaker includes at least one summation current transformer through which at least one first lead and one second lead of a network to be protected are guided. At least one secondary winding is arranged on the summation current transformer and operatively connected at least indirectly with at least one energy storage element. At least one discharging resistor is switched in parallel with the energy storage element. The residual-current circuit breaker has a trip element which is operatively connected with break contacts in the at least one first lead and the at least one second lead. In order to reduce unexpected cut-offs of a network to be protected, the at least one discharging resistor includes a first partial resistor, and a second partial resistor switched in series with respect to the first partial resistor, with a least one electric signaling device operatively connected, at least indirectly, with the first partial resistor.

STATIC NUMERIC RELEASE UNIT FOR CIRCUIT-BREAKERS, EQUIPPED WITH A CALIBRATION CIRCUIT.

DEVICE FOR THE MEASUREMENT OF A TENSION.

CONTROL DEVICE FOR SEVERAL LINES, THE POLYPHASE ALTERNATING CURRENT LEADING

Mechanism for the automatic statement of that line, which leads the largest river from several lines, in particular for the collection of a ground fault in radial networks

CURRENT MONITORING CONTROL FOR ELECTRICALLY POWERED DEVICES

Title CURRENT MONITORING CONTROL FOR ELECTRICALLY POWERED DEVICES Inventors James F. Saunders Robert E. Krocker Abstract Apparatus and method for controlling one or more electrically powered devices. A control for a temperature conditioning system is shown which is operative to monitor the electrical current supplied to component devices, i.e., compressors, auxiliary heating elements, indoor fan, and outdoor fan; and to cause an indicator means to indicate that one or more of the devices has failed to operate in a manner consistent with the controlled status of the system. If a failure is detected, control means are op-erative to lock out one or more of the devices from oper-ation.

INPROVEMENTS IN ELECTRICAL PROTECTION AND CONTROL SYSTEMS

A protection and control system incorporates status acquisition apparatus (100) for use in monitoring the status of a device in the protection and control system, such as a protection relay in a high voltage electrical circuit. The status acquisition apparatus comprises an conversion circuit (101) which converts an input voltage to a pulse width modulated signal and a comparison circuit (103) which monitors the pulse width modulated signal to determine the status of the device. The mark-space ratio of the pulse width modulated signal decreases as the input voltage is increased to minimise power dissipation over a range of input voltages. The status acquisition apparatus may form an integral part of a protective switching device, although other applications are envisaged.

GROUND FAULT DETECTION

The present invention relates to a ground fault detection arrangement for a synchronous three-phase electrical machine, and an electrical system comp rising a ground fault detection arrangement and a synchronous three-phase el ectrical machine. The ground fault detection arrangement injects an off-nomi nal frequency voltage between a neutral point of the synchronous three-phase electrical machine and ground and measure resultant currents to detect a gr ound fault.

APPARATUS FOR DETECTING ARCING FAULTS AND GROUND FAULTS IN MULTIWIRE BRANCH ELECTRIC POWER CIRCUITS

A multiwire branch circuit including two line conductors and a grounded, common neutral conductor is protected by a two pole circuit breaker connected to interrupt current flow in the two ungrounded line conductors. Three separate protection circuits provide arc fault protection for each of the ungrou nded line-conductors and ground fault protection for all three conductors. The arc fa ult delectors use the bimetal of the thermal-magnetic trip device for the associated line cond uctor, and therefore, are individually referenced to the associated line voltage. Hence , the outputs of the arc fault detectors are electrically isolated from each other and from the output of the ground fault detector, but operate a common trip circuit to open t he two pole circuit breaker. The arc fault detectors have separate isolated power suppl ies. The ground fault detector is powered by a supply which is energized if either of the ungrounded line conductors is energized.

ARC FAULT DETECTOR WITH CIRCUIT INTERRUPTER AND EARLY ARC FAULT DETECTION

An arc fault detector comprised as a stand alone unit and in combination with a ground fault circuit interrupter (GFCI) functions to provide protection from potentially dangerous arc fault conditions. When combined with a GFCI, the combination arc fault/ground fault circuit interrupter (AFCI/GFCI) provides protection from both arc fault and ground fault conditions. A single transformer is used to detect faults between neutral and ground and arc faults. An impedance splits the current flow into two portions so as to generate differential current proportional to the current flowing through the conductors. An early arcing detector periodically tests the AC line for high impedance between the device and a main breaker panel. The AFCI/GFCI device detects both AC line frequencies and high frequencies associated with arcing. Both average and instantaneous values of both AC line frequency and high frequency arcing signals are processed to generate an arc fault signal. The device allows the arc detector to differentiate between destructive high level arcing and low level arcing such as generated by typical household appliances and equipment. This serves to decrease the occurrence of false tripping. The device also includes a timer circuit, which permits the user to temporarily disable the arc detector, and includes communication means to permit the device to communicate the occurrence and location of the arc fault to a centralized monitoring station.

Richtungsgliedschaltung für schnellarbeitende Distanzschutzeinrichtungen.

Messanordnung, insbesondere für Impedanz-Schutzeinrichtungen, in einem Drehstromnetz

Uberwachungseinrichtung, welche in Abhängigkeit von mehreren Strömen arbeitet

Distanzschutz für Dreiphasennetze

Relais de protection

Einrichtung zur selbsttätigen Feststellung jener Leitung, die von mehreren Leitungen den grössten Strom führt, insbesondere zur Erfassung eines Erdschlusses in Strahlennetzen

Relais de protection d'un circuit électrique polyphasé

Anregeschaltung für Schutzrelaisanordnungen

УСТРОЙСТВО РАСЦЕПИТЕЛЯ С ВОССОЗДАНИЕМ ФАЗЫ И АВТОМАТИЧЕСКИЙ ВЫКЛЮЧАТЕЛЬ, СОДЕРЖАЩИЙ ТАКОЕ УСТРОЙСТВО РАСЦЕПИТЕЛЯ

Устройство расцепителя с воссозданием фазы содержит устройство обработки (1), содержащее средство (6) для воссоздания фазы, принимающее сигналы (Is1 и Is3), представляющие сигналы тока, выдаваемые датчиками. Средство для воссоздания фазы содержит средства (11, 12, 25) для определения сигналов (Ia1, Ia3), представляющих амплитуды сигналов тока (Isl и Is3), выдаваемых двумя датчиками, средства (15, 27-33) для определения сигнала (F(φ), S(φ), cos(φ)), представляющего фазовый сдвиг между сигналами, представляющими сигналы, выдаваемые двумя датчиками, и средства (13, 14, 16, 17, 34) для определения сигнала (Ia22, Ia2, I2), представляющего ток фазы, воссозданный согласно сигналам, представляющим амплитуды, и сигналу, представляющему фазовый сдвиг сигналов, выдаваемых двумя датчиками. Автоматический выключатель содержит такое устройство расцепителя.

УСТРОЙСТВО РАСЦЕПИТЕЛЯ С ВОССОЗДАНИЕМ ФАЗЫ И АВТОМАТИЧЕСКИЙ ВЫКЛЮЧАТЕЛЬ, СОДЕРЖАЩИЙ ТАКОЕ УСТРОЙСТВО РАСЦЕПИТЕЛЯ

ТРАНСФОРМАТОРНАЯ ПОДСТАНЦИЯ

Предлагаемая усовершенствованная трансформаторная подстанция получена благодаря применению изобретенной уникальной схемы соединений включенного в неё оборудования. Предлагаемое решение включает применение средневольтного выключателя, соединенного с другим оборудованием или выключателями таким образом, что основной поток энергии направляется только через этот выключатель. От всего другого распределительного устройства требуется лишь отключать ток нагрузки распределительного трансформатора, что позволяет исключить элегаз SFи использовать вместо него минеральное или силиконовое масло, сложные эфиры или твердую изоляцию. Дополнительно обеспечивается повышение надежности кабельной сети за счет внедрения точек автоматического секционирования и исключения предохранителей с высокой отключающей способностью и использования вместо них для защиты распределительного трансформатора вакуумного выключателя. Кроме того, изобретение относится к системе для защиты автоматического секционирования и реконфигурации средневольтной распределительной линии от электрических повреждений, причём указанная система использует указанные трансформаторные подстанции, соединенные между собой, и, факультативно, с обычными трансформаторными подстанциями. The proposed improved transformer substation is obtained through the use of invented unique wiring diagram of the equipment included in it. The proposed solution includes the use of a medium-voltage switch connected to other equipment or switches in such a way that the main flow of energy is directed only through this switch. All other switchgear is only required to disconnect the load current of the distribution transformer, which eliminates SF6 gas and uses mineral or silicone oil, esters or solid insulation instead. Additionally, the reliability of the cable network is improved by introducing automatic partitioning points and eliminating fuses with high breaking capacity and using them instead to protect the distribution transformer of a vacuum ...

УСТРОЙСТВО РАСЦЕПИТЕЛЯ С ВОССОЗДАНИЕМ ФАЗЫ И АВТОМАТИЧЕСКИЙ ВЫКЛЮЧАТЕЛЬ, СОДЕРЖАЩИЙ ТАКОЕ УСТРОЙСТВО РАСЦЕПИТЕЛЯ

... 1. Устройство расцепителя с воссозданием фазы, содержащее по меньшей мере, два датчика (2, 3), расположенные на проводах электропитания (36), которые должны быть защищены, и блок обработки (1), содержащий средство (4) для обработки сигналов тока, присоединенное к датчикам, средство (6) для воссоздания фазы, принимающее сигналы (Is1, Is3), представляющие сигналы тока, выдаваемые датчиками, и средство (5) для обработки функций расцепления, присоединенное к средству для обработки сигналов тока и к средству для воссоздания, отличающееся тем, что средство для воссоздания фазы содержит первые средства определения (11, 12, 25) сигналов (Ia1 и Ia3), представляющих амплитуды сигналов тока (Is1, Is3), выдаваемых двумя датчиками, вторые средства определения (15, 27-33) сигнала (F(ϕ), S(ϕ), cos(ϕ), (ϕ), (ϕ0)), представляющего фазовый сдвиг между сигналами, представляющими сигналы (Is1 и Is3), выдаваемые двумя датчиками, и присоединенные к первым и вторым средствам определения третьи средства определения ...

ЭЛЕКТРИЧЕСКАЯ ПАНЕЛЬ

Настоящее изобретение относится к электрической панели T, содержащей основной модуль (1) электрического коммутационного устройства и по меньшей мере одно отдельное устройство (2) электрозащиты, называемое фидерным модулем, причем каждый основной модуль (1) содержит по меньшей мере одну электрическую размыкающую цепь (3, 4), а каждый фидерный модуль (2) содержит определенное число электрических фазовых защитных цепей (6), при этом каждый фидерный модуль (2) последовательно соединен с одной или другой из электрических размыкающих цепей (3, 4) основного модуля (1), причем упомянутая панель дополнительно содержит средство обнаружения электрического короткого замыкания (16) по меньшей мере в одной из фазовых размыкающих цепей (6) фидерных модулей (2), а по меньшей мере один из фидерных модулей (2) содержит средство обнаружения электрической перегрузки (9), при этом упомянутая электрическая панель отличается тем, что упомянутое средство обнаружения перегрузки (9) управляет размыканием переключателей ...

Circuit responder of undervoltage

DEVICE OF DETECTION OF LEVEL OF CURRENT FOR the PROTECTION Of a CIRCUITCONTRE OVERCURRENTS IN Alternative course

INSPECTING DEVICE OF the OPERATION Of an ELECTRICAL MOTOR FEEDS ENALTERNATIF

DEVICE AND METHOD FOR TESTING OPERATION OF A PROTECTIVE DEVICE AND PROTECTIVE DEVICE COMPRISING SUCH A TEST

L'invention porte sur un dispositif de test (1) du fonctionnement d'un appareil de protection (2) d'un réseau électrique. Le dispositif de test comporte : - un générateur (6) pour générer un train d'impulsions (65) dans un enroulement secondaire d'un transformateur de courant (3) selon un profil de fréquences tel qu'une mesure du train d'impulsions (65) après passage dans un filtre passe-bas (44) soit inférieure à un seuil de déclenchement sélectionné (Sd), et - un circuit de traitement (7) agencé pour identifier une présence du train d'impulsions (65) dans un signal délivré par un second enroulement secondaire du transformateur de courant. L'invention porte également sur un appareil de protection (2) comportant un tel dispositif de test (1) et sur un procédé de test d'un appareil de protection électrique. The invention relates to a device for testing (1) the operation of a protective device (2) of an electrical network. The test device comprises: - a generator (6) for generating a pulse train (65) in a secondary winding of a current transformer (3) according to a frequency profile such as a measurement of the pulse train (65) after passing through a low-pass filter (44) is less than a selected trigger threshold (Sd), and - a processing circuit (7) arranged to identify a presence of the pulse train (65) in a signal delivered by a second secondary winding of the current transformer. The invention also relates to a protection device (2) comprising such a test device (1) and to a method of testing an electrical protection device.

FEEDING ATTACHMENT OF FILTERS OF CURRENT

DEVICE OF DETECTION OF LEVEL OF CURRENT FOR the PROTECTION Of a CIRCUIT AGAINST the OVERCURRENTS IN Alternative course

Ce dispositif de détection de niveau de courant est du genre comportant, d'une part, des moyens de résistance (15), qui sont à insérés sur le circuit (10) à protéger, et, d'autre part, à raison d'une par alternance de courant, deux cellules de détection (16A, 16B), qui, semblables l'une à l'autre, sont branchées aux bornes de ces moyens de résistance (15). Suivant l'invention, par un montage croisé, les deux cellules de détection (16A, 16B) sont l'une et l'autre branchées aux bornes des mêmes moyens de résistance (15). Application, notamment, à la protection d'un circuit mettant en oeuvre des semi-conducteurs de puissance.

DISРОSIТIF DЕ СОNТRОLЕ DU FОNСТIОNNЕМЕNТ D'UN МОТЕUR ЕLЕСТRIQUЕ АLIМЕNТЕ ЕN АLТЕRNАТIF

SMART DISTRIBUTION WITH MULTY SWITCH MODULE HAVING HIGH-ACCURACY DIGITAL TECHNOLOGY

According to the present invention to achieve the above object, provided is a smart distribution panel equipped with a multi-switch module having high-precision digital technology. The multi-switch module comprises: a CPU receiving a current value of each phase detected by a CT, and outputting a trip signal when the current value of any one of three-phase current values exceeds a set allowable current value; and a plurality of dip switch units connected to each of a main breaker and a plurality of branch breakers and capable of selecting different the allowable current values through switch operation. Therefore, the present invention improves accuracy of a MCCB to be within 2% by using a dip switch, is easy to select a temporary load and an instantaneous load, and easily selects 50% of breaking capacity for sudden load monitoring.

CIRCUIT BRANCH MEASURING SYSTEM

A circuit branch measurement system and device (7) are provided for detecting electrical current by circuit branches in an electrical distribution panel. The circuit branch measurement device consist of a current measurement and data transmitting device (1) which is electrically and mechanically connected (3) current sensor modules (2). The system comprises an identification device to associate each attached current sensor module with a unique identification number and a communication driver to transmit the collective data from the system to a monitoring device.

Improvements in or relating to protective systems for polyphase transmission lines

... 652,191. Protective cut-out arrangements. WESTINGHOUSE ELECTRIC INTERNATIONAL CO. Oct. 8, 1948, No. 26281. Convention date, Nov. 29, 1947. [Class 38(v)] In a protective system for a three-phase transmission line, similar to that of Specification 651,998, the fault-detector relays FD1 and FD2 each have an operating coil (denoted by FD1 and FD2) and a restraining coil FD1R and FD2R. The operating coils are connected in series and supplied from a network of filter HC B over a non- saturating transformed NST and a rectifier bridge RB. The restraining coils are connected in series in the anode circuit of a triode 9, the grid of which is connected to a tapping on a resistance RO1 fed from the output terminals m, n, of a minimumvoltage network. This network gives at terminals m, n, the smallest of the three phase-to-phase voltages supplied by transformers Ta-Tc. The latter energize rectifier bridges Ba-Bc and condensers Ca-Cc, which are 'shunted by resistors Rr, the potential drops across the ...

EARTH FAULT CIRCUIT BREAKER

FILTER SUPPLY CIRCUIT IN AN ELECTRICAL PROTECTION DEVICE

GROUND FAULT SWITCH

ÜBERWACHUNGSEINRICHTUNG FÜR ZWEI ODER MEHRERE LEITUNGEN, INSBESONDERE FÜR DREI LEITUNGEN, DIE PHASENVERSCHOBENEN WECHSELSTROM FÜHREN

ELECTRONIC DISCONNECTING SWITCH SYSTEM

Switching configuration with a relay releasing with the occurrence of abnormal operating conditions a message or a protection device

A LOW-VOLTAGE CIRCUIT BREAKER COMPRISING AN INTERFACE UNIT

Electric installation structure

DUAL CURRENT TRANSFORMER CURRENT SENSING METHOD AND SENSOR

... 18 50,880 A method and current sensor for use in a three phase ac system for producing a signal indicative of the average value of the sum of the squares of the ac current and of the phase imbalance between the three phases using two current transducers.

CIRCUIT BREAKER WITH DIGITAL SOLID-STATE TRIP UNIT FITTED WITH A CALIBRATION CIRCUIT

CIRCUIT BREAKER WITH DIGITAL SOLID-STATE TRIP UNIT FITTED WITH A CALIBRATION CIRCUIT Microprocessor-based solid-state trip unit (48) processing digital signals derived from analog signals supplied by current sensors (16). The analog signals are applied to a calibration circuit (34), which adapts the output range of the analog circuits to that of the logic circuits, to obtain with an 8-bit Analog-to-Digital Converter (50) associated with a Multiplexer (29) a range equivalent to that of 12-bit processing systems.

DUAL CURRENT TRANSFORMER CURRENT SENSING METHOD AND SENSOR

CURRENT MONITORING CONTROL FOR ELECTRICALLY POWERED DEVICES

COMPUTATIONALLY-EFFICIENT DISTANCE RELAY FOR POWER TRANSMISSION LINES

The relay includes means for obtaining current and voltage samples on the power transmission line for a particular possible fault type. The current sample is multiplied by the replica impedance of the power transmission line, while the voltage sample is multiplied by a polarizing voltage to provide a first complex expression having a real portion and an imaginary portion. The product of the current sample and the replica impedance is multiplied by the polarizing voltage to produce a second complex expression having a real portion and an imaginary portion. The real portion of the first complex expression is then divided by the real portion of the second complex expression to produce a scale value m which is compared against known reference scale values for each zone, so as to determine underimpedance conditions in any one of the zones.

ELECTRONIC THERMAL PROTECTION DEVICE

La présente invention concerne un dispositif électronique de protectionthermique destiné à interrompre l'alimentation sur une ligne polyphasée (L1, L2,L3), comprenant un détecteur thermique (1) doté d'un élément résistif (11) thermiquement couplé à un capteur de température (14), celui-ci étant connecté à un circuit numérique de traitement (3) apte à fournir un ordre de commande en fonction de la surcharge détectée par le capteur de température (14) et caractérisé par le fait que l'élément résistif (11) du détecteur thermique est connecté aux différents redresseurs (R1, R2, R3) alimentés chacun par un transformateur d'intensité (Ti1, Ti2, Ti3) installé sur un fil de ligne de manière que ledit élément résistif (11) soit parcouru par la somme des courants (i2) délivrés par les redresseurs (R1, R2, R3).

ЭЛЕКТРИЧЕСКАЯ ПАНЕЛЬ

Настоящее изобретение относится к электрической панели Т, содержащей основной модуль (1) электрического коммутационного устройства и по меньшей мере одно отдельное устройство (2) электрозащиты, называемое фидерным модулем, причем каждый основной модуль (1) содержит по меньшей мере одну электрическую размыкающую цепь (3, 4), а каждый фидерный модуль (2) содержит определенное число электрических фазовых защитных цепей (6), при этом каждый фидерный модуль (2) последовательно соединен с одной или другой из электрических размыкающих цепей (3, 4) основного модуля (1), причем упомянутая панель дополнительно содержит средство обнаружения электрического короткого замыкания (16) по меньшей мере в одной из фазовых размыкающих цепей (6) фидерных модулей (2), а по меньшей мере один из фидерных модулей (2) содержит средство обнаружения электрической перегрузки (9), при этом упомянутая электрическая панель отличается тем, что упомянутое средство обнаружения перегрузки (9) управляет размыканием переключателей ...

CURRENT TRANSFORMER FOR PROTECTING NEUTRAL OF AN ELECTRICAL APPLIANCE [...] PROTECTION

DEVICE AND METHOD FOR TESTING OPERATION OF A PROTECTIVE DEVICE AND PROTECTIVE DEVICE COMPRISING SUCH A TEST

L'invention porte sur un dispositif de test (1) du fonctionnement d'un appareil de protection (2) d'un réseau électrique. Le dispositif de test comporte : - un générateur (6) pour générer un train d'impulsions (65) dans un enroulement secondaire d'un transformateur de courant (3) selon un profil de fréquences tel qu'une mesure du train d'impulsions (65) après passage dans un filtre passe-bas (44) soit inférieure à un seuil de déclenchement sélectionné (Sd), et - un circuit de traitement (7) agencé pour identifier une présence du train d'impulsions (65) dans un signal délivré par un second enroulement secondaire du transformateur de courant. L'invention porte également sur un appareil de protection (2) comportant un tel dispositif de test (1) et sur un procédé de test d'un appareil de protection électrique. The invention relates to a device for testing (1) the operation of a protective device (2) of an electrical network. The test device comprises: - a generator (6) for generating a pulse train (65) in a secondary winding of a current transformer (3) according to a frequency profile such as a measurement of the pulse train (65) after passing through a low-pass filter (44) is less than a selected trigger threshold (Sd), and - a processing circuit (7) arranged to identify a presence of the pulse train (65) in a signal delivered by a second secondary winding of the current transformer. The invention also relates to a protection device (2) comprising such a test device (1) and to a method of testing an electrical protection device.

Directional assembly for protective gears of distance to fast operation

ELECTRICAL WIRING BOARD

La présente invention a pour objet un tableau de protection électrique destiné à assurer la protection, notamment, contre des courts circuits, des surcharges ou des courants de défaut survenant dans au moins un circuit-électrique (3a, 3b, 3c, 3d) en aval, ledit tableau comprenant un ensemble de protection de tête (1) et un ensemble de protection de départ (2) alimenté par ce dernier. L'ensemble de protection de tête comprend au moins un appareil de protection de tête (la, lb) et l'ensemble de protection de départ comprend au moins un appareil de protection de départ (2a, 2b, 2c, 2d). Le ou chaque appareil de protection de départ est apte, suite à une détection de surcharge, à interrompre, individuellement, le passage du courant électrique dans le ou les circuit(s) électrique(s) à protéger associé(s) ou l'ensemble de protection de tête est apte, suite à une détection de surcharge à interrompre, de manière centralisée, l'alimentation de l'ensemble des circuits électriques en aval à protéger ...

ELECTRIC SAFETY DEVICE WITH CONVERTER ANALOGUE-NUMERIQUE OF TYPE SIGMA-DELTA

Le dispositif de protection électrique comporte une pluralité des capteurs, un multiplexeur et un convertisseur analogique-numérique de type sigma-delta. Le convertisseur comporte un modulateur sigma-delta en série avec un filtre numérique de décimation. Le filtre de décimation comporte des coefficients de pondération k;, de rang 1 à n, tels que le produit de la dynamique de mesure des signaux mesurés par les capteurs et du rapport soit inférieur à la précision désirée pour lesdits signaux, les coefficients de rang 1 à m étant les coefficients utilisés pendant le temps de stabilisation (Ts) du modulateur. Les coefficients du filtre de rang 1 à m sont, de préférence, nuls.

Protective relay apparatus

Compatibility with a current transformer having several kinds of rated current ratios is achieved by finding out a formula of relationship between errors arising in a transformer input circuit and detectable ranges set as setting values of the input circuits which can be optimally set. In connection with that, by dispensing with a gain control section, the number of components, the mounting area and the cost can be reduced. Arithmetic expressions representing the relationship among errors arising in the transformer input circuit, the instrumentation ranges of the input circuits, and detectable errors have been derived. Further by optimally setting the detectable ranges of the input circuits, which are the parameters of the arithmetic expressions, the configuration compatible with a current transformer having several kinds of rated current ratios is achieved.

Power converter, X-ray CT apparatus, and X-ray imaging apparatus

A power converter is configured to include an inverter which converts a DC output into an AC voltage of a predetermined frequency, and a high voltage generator which receives an output from output terminals of the inverter and boosts the output to a desired high DC voltage. The high voltage generator includes a transformer, and the primary windings of the transformer are connected to the output terminals of the inverter in parallel by conductive wires connected to both ends of each primary winding. Further, a current sensor is provided to detect a current flowing through each of the primary windings, and a control unit determines abnormalities of a path of the inverter and the primary windings on the basis of a value of the current sensor.

Arc fault detector with circuit interrupter and early arc fault detection

An arc fault detector comprised as a stand alone unit and in combination with a ground fault circuit interrupter (GFCI) functions to provide protection from potentially dangerous arc fault conditions. When combined with a GFCI, the combination arc fault/ground fault circuit interrupter (AFCI/GFCI) provides protection from both arc fault and ground fault conditions. A single transformer is used to detect faults between neutral and ground and arc faults. An impedance splits the current flow into two portions so as to generate differential current proportional to the current flowing through the conductors. An early arcing detector periodically tests the AC line for high impedance between the device and a main breaker panel. The AFCI/GFCI device detects both AC line frequencies and high frequencies associated with arcing. Both average and instantaneous values of both AC line frequency and high frequency arcing signals are processed to generate an arc fault signal. The device allows the arc ...

MOTOR DRIVING APPARATUS HAVING FAULT DIAGNOSTIC FUNCTION

A motor driving apparatus capable of detecting during operation a ground fault and a phase-to-phase short circuit by distinguishing one from the other is provided while minimizing an increase in cost. The sum of three-phase AC currents supplied from a three-phase AC power supply to an AC/DC converter is detected by a current sensor. When overcurrent is detected by an overcurrent detector, if the sum of the currents detected by the current sensor is zero, it is determined that the fault is a phase-to-phase short circuit, but if the sum is not zero, it is determined that the fault is a ground fault.

Electrical apparatus

An electrical apparatus that can prevent erroneous attachment of a fuse is provided. A PCU includes a housing having a surface. A fuse storage space is formed in the housing. The fuse storage space communicates with a region outside of the housing through an opening formed at the surface. The PCU further includes a cover member covering the opening, and an overcurrent-protection fuse located in the fuse storage space. The cover member includes a cover body closing the opening, and a projection section projecting inward of the fuse storage space relative to the cover body. The projection section interferes with the fuse when the fuse is attached erroneously in the fuse storage space.

Apparatus for preventing over/under voltage, light emitting module and display apparatus

An apparatus for preventing abnormal voltage (100), a light emitting module, and a display apparatus are provided. The present apparatus for preventing abnormal voltage (100) extracts the highest voltage and the lowest voltage among voltage applied from a plurality of loads (110), includes two voltage distribution units (130,135) distributing the highest voltage and the lowest voltage, and detects whether the highest voltage and the lowest voltage applied from the voltage distribution (130,135) unit are within a predetermined range. Accordingly, the apparatus for preventing abnormal voltage (100) is not affected greatly in terms of its size and cost even if the number of loads to be protected increases.

RESIDUAL CURRENT DEVICE SENSITIVE TO UNIVERSAL-CURRENT

A circuit for detecting a short circuit in a low side driven load

A circuit is provided for detecting a short circuit in a remote low-side driven load (20) wherein a single conductor (16) is used to both transmit a control signal from a microprocessor controller (10) through a local driver (12) to the remote driver (32) of the load (20) and also to transmit fault signals from the remotely driven load (20) back to the control means (10). A control signal is transmitted from the microprocessor controller (10) through a local driver circuit (12) to a remote driver circuit (32) on a single conductor (16). A short circuit at the remote load (20) causes a fault signal to be latched for later detection by the microprocessor (10) and a short circuit at the local driver (12) is immediately detected. ...

АВТОМАТИЧЕСКИЙ ВЫКЛЮЧАТЕЛЬ ДЛЯ ЗАЩИТЫ ОТ ТОКА УТЕЧКИ

FIELD: electricity. SUBSTANCE: automatic circuit breaker (1) includes at least one total current converter (2), through which there passed is at least one first conductor (15) and one second conductor (16) of a protected network. Besides, at least one secondary winding (17) is installed in total current converter (2). Secondary winding (17) is connected indirectly kinematically to energy-accumulating element (5); with that, at least one discharge resistance element (4) is connected parallel to energy-accumulating element (5). Also, automatic circuit breaker (1) includes disconnector (7) kinematically connected to opening contacts, at least in the first conductor (15) and at least in the second conductor (16), at least one discharge resistance element (4) is formed with the first resistance section (4a), and at least with one resistance section (4b) connected in series with the first one, and at least one first electric signal device (20) is at least indirectly kinematically connected to the first resistance section (4a). EFFECT: improving reliability. 10 cl, 1 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 497 255 (13) C2 (51) МПК H02H 3/04 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2011101389/07, 27.04.2009 (24) Дата начала отсчета срока действия патента: 27.04.2009 (72) Автор(ы): МАЙЗЕЛЬ Райнер (AT), РИТЦИНГЕР Георг (AT) (73) Патентообладатель(и): ИТОН ГМБХ (AT) R U Приоритет(ы): (30) Конвенционный приоритет: 18.06.2008 AT A977/2008 (43) Дата публикации заявки: 27.07.2012 Бюл. № 21 2 4 9 7 2 5 5 (45) Опубликовано: 27.10.2013 Бюл. № 30 (56) Список документов, цитированных в отчете о поиске: GB 2268011 A, 22.12.1993. RU 2069434 C1, 20.11.1996. DE 19940343 A1, 01.03.2001. DE 2555221 A1, 23.06.1977. 2 4 9 7 2 5 5 R U (86) Заявка PCT: AT 2009/000168 (27.04.2009) C 2 C 2 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 18.01.2011 (87) Публикация заявки РСТ: WO 2009/152539 (23.12.2009) Адрес ...

Schutzeinrichtung fuer elektrische Mehrphasennetze

Schaltungsanordnung zur Stromerfassung in Stromleitern zur Ansteuerung elektronisch steuerbarer Auslöseeinrichtungen

Schaltungsanordnung zur gleichzeitigen UEberwachung mehrerer Spannungen auf Unter- und/oder UEberschreitungen eines vorgegebenen Sollpegels

Motor control unit with current interrupter and overload relay

DEVICE FOR THE PROTECTION OF AN ACCESS LINE INTERFACE AGAINST OVERVOLTAGES

CONTROL DEVICE FOR TWO OR SEVERAL LINES, IN PARTICULAR FOR THREE LINES, THE OUT OF PHASE ALTERNATING CURRENT LEADING

ÜBERWACHUNGSEINRICHTUNG FÜR ZWEI ODER MEHRERE LEITUNGEN, INSBESONDERE FÜR DREI LEITUNGEN, DIE PHASENVERSCHOBENEN WECHSELSTROM FÜHREN

DEVICE FOR SEIZING ELECTRICAL DIFFERENCE STREAM

FEHLERSTROMSCHUTZSCHALTER

Bei einem Fehlerstromschutzschalter (1), umfassend wenigstens einen Summenstromwandler (2) durch welchen wenigstens ein erster Leiter (15) und ein zweiter Leiter (16) eines zu schützenden Netzes geführt sind, wobei auf dem Summenstromwandler (2) wenigstens eine Sekundärwicklung (17) angeordnet ist, wobei die Sekundärwicklung (17) mit wenigstens einem Energiespeicherelement (5) wenigstens mittelbar wirkverbunden ist, wobei wenigstens ein Entladewiderstand (4) zu dem Energiespeicherelement (5) parallel geschaltet ist, wobei der Fehlerstromschutzschalter (1) einen Auslöser (7) aufweist, welcher mit Trennkontakten in dem wenigstens einen ersten Leiter (15) und dem wenigstens einen zweiten Leiter (16) wirkverbunden ist, wird zur Reduktion unerwarteter Abschaltung eines zu schützenden Netzes vorgeschlagen, dass der wenigstens eine Entladewiderstand (4) durch einen ersten Teilwiderstand (4a) und wenigstens einem zu diesem seriell geschalteten zweiten Teilwiderstand (4b) gebildet ist, und dass wenigstens ein erstes elektrisches Signalmittel (20) wenigstens mittelbar zu dem ersten Teilwiderstand (4a) parallel geschalten ist. In a fault current circuit breaker (1) comprising at least one summation current transformer (2) through which at least a first conductor (15) and a second conductor (16) of a network to be protected are guided, wherein on the summation current transformer (2) at least one secondary winding (17) is arranged, wherein the secondary winding (17) with at least one energy storage element (5) is operatively connected at least indirectly, wherein at least one discharge resistor (4) to the energy storage element (5) is connected in parallel, wherein the residual current circuit breaker (1) has a trigger (7) , which is operatively connected to isolating contacts in the at least one first conductor (15) and the at least one second conductor (16), is proposed for reducing unexpected disconnection of a network to be protected, that the at least one discharge ...

ALLSTROMSENSITIVE FAULT CURRENT PROTECTION DEVICE

Fault current circuit breaker

ELECTRICAL SWITCHING APPARATUS EMPLOYING INTERLOCKS FOR FIRST AND SECOND TRIP FUNCTIONS

A circuit breaker includes separable contacts for movement between a closed position and an open position. An operating mechanism, which moves the separable contacts between the closed and open positions, has a closed state and an open or tripped state which corresponds to the open position. A current transformer senses electrical current flowing through the separable contacts as a sensed current. A trip mechanism employs the sensed current for tripping the operating mechanism to the tripped position to move the separable contacts to the open position. The trip mechanism includes a microprocessor which generates short delay and ground fault trip functions of electrical current and time. The microprocessor inputs a first interlock signal from a downstream electrical switching device which generates the first interlock signal with a first value when current through the downstream device exceeds a predetermined value and with a second value otherwise. The microprocessor generates and outputs ...

PROCESS AND DEVICE TO IMPLEMENT AN ELECTRICAL MOTOR

Procédé et dispositif pour mettre en oeuvre un système d'actionnement à moteur électrique comprenant une pièce actionnée (12) (toit ouvrant ou vitre) avec risque de pincement d'objets ou de parties du corps humain. Un dispositif de traitement de signal (36) tient compte d'une grandeur caractéristique du système d'actionnement pour définir un critère de coupure ou d'inversion de sens de fonctionnement de la pièce (12). Pour définir ce critère on utilise au moins une température ambiante du système d'actionnement en saisissant cette grandeur et en la traitant dans le dispositif (36). Le dispositif comporte au moins un capteur de température (43) dans le système d'actionnement.

내부 회로와 정전 보호 회로를 구비하는 반도체 집적회로

... 전원 전압의 분리수나 접지 전압의 분리수의 증대에 의해 정전 보호 회로의 회로수 혹은 정전 보호 소자수의 증대를 경감한다. 반도체 집적회로(1)는, 제1과 제2와 제3의 동작 전압 공급 단자(21, 22, 23)와, 제1과 제2와 제3의 내부 회로(11, 12, 13)와, 제1과 제2와 제3의 정전 보호 회로(41, 42, 43)와, 접속중점(Cd)을 구비한다. 제1과 제2와 제3의 내부 회로(11, 12, 13)는, 제1과 제2와 제3의 동작 전압 공급 단자(21, 22, 23)의 제1과 제2와 제3의 동작 전압으로 각각 동작한다. 제1과 제2와 제3의 정전 보호 회로(41, 42, 43)는, 제1과 제2와 제3의 동작 전압 공급 단자(21, 22, 23)와 접속중점(Cd)의 사이에 각각 접속된다. 즉, 제1과 제2와 제3의 정전 보호 회로(41, 42, 43)는, 종래의 Δ(델타) 접속이 아니라, 접속중점(Cd)에 관해서 Y(스타) 접속된다.

Low-voltage circuit breaker comprising an interface unit

A low-voltage circuit breaker comprising a casing containing at least one fixed contact and at least one mobile contact. The circuit breaker moreover comprises, inside said casing, a first communication bus, designed to interface a plurality of accessories and devices of said circuit breaker, and an interface unit, which comprises a plurality of ports that are designed to be connected to said accessories and devices via said first communication bus.

Power cord with leakage current detection and interruption function

A power cord with leakage current detection and interruption (LCDI) function includes at least two power supply lines, at least two insulating layers respectively covering the at lease two power supply lines, at least two leakage current detection lines respectively disposed around the at least two insulating layers, including a first leakage current detection line and a second leakage current detection line, at least one connector line, electrically coupled to the first leakage current detection line and/or the second leakage current detection line, and at least one insulating structure, covering at least one of the at least two leakage current detection lines, to electrically insulate the first and second leakage current detection lines from each other.

RESIDUAL CURRENT DEVICE SENSITIVE TO UNIVERSAL-CURRENT AND METHOD FOR DETECTING A FAULT CURRENT

The invention relates to two evaluation principles for detecting both a continuous d.c. fault current and a changing fault current/pulsating d.c. fault current independently of one another, using only one summation current transformer (4). The induction principle is used to detect the changing fault current and the principle known as controlled induction is used to detect the d.c. fault current. The residual current device (2) is characterised by the bipolar control of a control winding (6) together with a generator (16). The selection of a specific core material for the summation current transformer (2) and the special circuit arrangement ensure the effectiveness and reliability of the residual current device.

Verfahren und Vorrichtung zur Detektion von Fehlerzuständen bei der Energieversorgung einer Last

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur Detektion von Fehlerzuständen bei der Energieversorgung einer Last, beispielsweise einer Detektion eines Drahtbruches oder eine Detektion des Vorliegens von Überlastzuständen. Dabei wird ein Spannungsabfall an einem Messwiderstand ausgewertet, welcher in einem Messsignalweg angeordnet ist, der parallel zum Hauptsignalweg verläuft. Der Messsignalweg wird nur kurzzeitig aktiviert, so dass die entstehende Verlustleistung klein ist.

DEVICE FOR THE CONTROLLING OF A ALTERNATING CURRENT-FED ELECTRIC MOTOR

ELEKTRISCHE INSTALLATIONSANORDNUNG

An electrical installation arrangement includes an electrical power distribution network and/or at least one first electrical device. In order to reduce complexity of electrical installation arrangement and increase safety of people and facilities, a detector is provided for determining a fault source using blind source separation, e.g. for locating at least one first electrical fault source, in particular at least one first fault current source and/or a first overload area. The detector is hereby disposed on and/or in the electrical power distribution network and/or the at least one first electrical device.

UNDERVOLTAGE SENSING CIRCUIT

Improvement of electric protection and control system

Fault current circuit breaker

本发明涉及一种故障电流保护开关(1)，该故障电流保护开关包含至少一个总加电流互感器(2)，待保护的电网的至少一个第一导体(15)和至少一个第二导体(16)引导穿过所述至少一个总加电流互感器，其中，在总加电流互感器(2)上布置有至少一个次级线圈(17)，其中，该次级线圈(17)与至少一个储能元件(5)至少间接地有效连接，其中，至少一个放电电阻(4)与储能元件(5)并联，其中，所述故障电流保护开关(1)具有触发器(7)，该触发器与至少一个第一导体(15)和至少一个第二导体(16)中的分离触点有效连接，为了减少待保护电网的突然断电而提出，至少一个放电电阻(4)由第一分电阻(4a)和至少一个与该第一分电阻串联的第二分电阻(4b)形成，并且至少一个第一电气信号装置(20)至少间接地与第一分电阻(4a)有效连接。

SYSTEM FOR PROTECTING ELECTRIC CIRCUITS.

Devices sensitive to two electric conditions and relay of distance containing them

Status acquisition device for monitoring state of equipment in protection and control system for energy generation, transmission and distribution, has comparison circuit comparing average value of modulated signal with reference value

Dispositif d'acquisition d'état (100) pour contrôler l'état d'au moins un équipement dans un système de protection et de commande pour la génération, la transmission et la distribution d'énergie, caractérisé en ce que le dispositif comporte : Des moyens de conversion (101) aptes à recevoir un signal d'entrée représentatif de l'état du dispositif et convertir le signal d'entrée en un signal numérique modulé synchrone dont la valeur moyenne dans le temps est proportionnelle à l'amplitude du signal d'entrée, et Des moyens de comparaison (103) aptes à comparer la valeur moyenne du signal modulé avec une valeur de référence et produire un signal indicateur de l'état si le résultat de la comparaison correspond à un critère prédéterminé.

Electrical circuit protection system

Ce système de protection de circuits électriques (60, 61, 62) permet une analyse de l'évolution en temps réel des courants électriques circulant dans ces circuits électriques, cette analyse ayant pour but de faire non seulement de la protection, mais de la prévention. Il comprend au moins un disjoncteur (64, 66) comportant une première bobine (70, 71) associée à un circuit magnétique et traversée par le courant principal, ainsi qu'une deuxième bobine (74, 75) également associée au circuit magnétique. Cette deuxième bobine est parcourue par un courant induit représentatif du courant électrique principal. Ce courant induit est traité par un circuit électronique (80) fournissant un signal traité représentatif d'au moins une caractéristique du courant principal, laquelle est utilisée pour la prévention des circuits électriques.

Single-element distance ground relay

Power controller module providing user selectable overload protection

A remote power controller module for use in power distribution systems having a number of current limiting channels that are capable of being paralleled to provide current pathways from a power source to a load. In one embodiment, the current limiting channels may contain control and monitoring circuitry for monitoring the trip status of all channels and for disabling all paralleled channels in response to the disablement of one channel. The control and monitoring circuitry may also reset the disabled current limiting channels. In another embodiment toggle switches may be used to reset the disabled current limiting channels. The current limiting channels may contain circuitry for monitoring the load across the channel and for tripping current a limit switch within the channel. In one embodiment, the circuitry may monitor current flow through the current limit switch. In another embodiment, the circuitry may monitor the current flow through the switch as well as the voltage drop across the ...

Current monitoring control for electrically powered devices

Apparatus and method for controlling one or more electrically powered devices. A control for a temperature conditioning system is shown which is operative to monitor the electrical current supplied to component devices, i.e., compressors, auxiliary heating elements, indoor fan, and outdoor fan; and to cause an indicator means to indicate that one or more of the devices has failed to operate in a manner consistent with the controlled status of the system. If a failure is detected, control means are operative to lock out one or more of the devices from operation.

Voltage regulator for dc motors

A voltage regulator for a pair of electric motors has an input for a signal indicative of the desired speed for the motors and a pulse width modulation control circuit device. A control module provides a conditioning signal to the control circuit to output to the motors a square wave voltage having a duty-cycle which varies according to a predetermined function of the signal applied to the input of the regulator. The control circuit device has first and second electronic solid state switches associated with the motor and controlled by the control module.

ELECTRICAL APPARATUS

An electrical apparatus that can prevent erroneous attachment of a fuse is provided. A PCU includes a housing having a surface. A fuse storage space is formed in the housing. The fuse storage space communicates with a region outside of the housing through an opening formed at the surface. The PCU further includes a cover member covering the opening, and an overcurrent-protection fuse located in the fuse storage space. The cover member includes a cover body closing the opening, and a projection section projecting inward of the fuse storage space relative to the cover body. The projection section interferes with the fuse when the fuse is attached erroneously in the fuse storage space. 1. An electrical apparatus comprising:a housing having a surface, a space being formed in said housing, said space communicating with a region outside of said housing through an opening formed at said surface; anda cover member made of metal, covering said opening; andan overcurrent-protection fuse located in said space,said cover member including a cover body closing said opening, and a projection section protruding inward of said space relative to said cover body,when said fuse is attached properly in said space, an insulation distance between said cover member and said fuse is ensured, and when said fuse is erroneously attached in said space, said projection section interfering with said fuse to disallow attachment of said cover member to said housing.2. The electrical apparatus according to claim 1 , wherein said cover body and said projection section are a unitary molding made of metal.3. The electrical apparatus according to claim 2 , wherein said cover body is formed plate-like claim 2 , andsaid projection section is formed denting in a direction from a side of an outer face towards a side of an inner face of said cover body.4. The electrical apparatus according to claim 3 , whereinsaid housing is arranged such that said surface has an inclination of a first angle relative to a ...

Device of protection against transient electrical overvoltages

A device of protection against transient electrical overvoltages, including two voltage-limiting passive components, disconnectors sensitive to the state of these components and adapted to individually disconnect each end of life component therefrom, the components are joined in parallel between a first and a second terminal of the device, where the reference voltage of the first component is inferior to the reference voltage of the second component.

Electric fuse current sensing systems and monitoring methods

Electrical current sensing and monitoring methods include connecting a compensation circuit across a conductor having a non-linear resistance such as a fuse element. The compensation circuit injects a current or voltage to the conductor that allows the resistance of the conductor to be determined. The current flowing in the conductor can be calculated based on a sensed voltage across the conductor once the resistance of the conductor has been determined.

CIRCUIT INTERRUPTERS AND ELECTRICAL ENCLOSURES WITH REJECTION FEATURES

A set of circuit interrupters and electrical enclosures that are configured to permit an electrical enclosure having a current rating to have connected therewith a circuit interrupter having a current carrying rating no greater than the current rating. However, a current interrupter having a current carrying rating less than the current rating of the electrical enclosure potentially may be connected therewith. Such electrical interruption equipment employs threaded studs on bus bars that are of varying sizes and/or are separated by varying distances in order to resist an electrical enclosure having a current rating from being electrically connected with a circuit interrupter having a current carrying rating greater than the current rating. Alternatively or additionally, the circuit interrupter and/or the electrical enclosure may have interference elements that physically interfere with the mounting and/or the electrical connection of a circuit interrupter having a current carrying rating with an electrical enclosure having a current rating less than the current carrying rating.

OVERTEMPERATURE PROTECTION

A protective circuit protects against overheating of the stator windings of an EC motor. The stator windings are connected to a semiconductor output stage which is designed for time-offset control of the stator windings using a driver circuit of a commutation controller. The protective circuit has two redundant sensor circuits, wherein two resistance-dependent sensor elements connected in series are provided in the first sensor circuit and one resistance-dependent sensor element is provided in the second sensor circuit. The first and the second sensor circuits are connected, respectively, to two evaluating circuits separated from each other and cause an interruption of the driver circuit using switch-off means when a system-specific resistance value of the first sensor element or the one sensor element associated with the second sensor circuit is reached. 1. A protective circuit for protecting against overheating of stator windings of an EC motor , the stator windings are connected to a semiconductor output stage which is designed for the time-offset control of the stator windings of the EC motor by means of a driver circuit of an electronic commutation controller for the purpose of producing a rotating magnetic field , the protective circuit comprises: a first and a second resistance-dependent sensor element connected in series are provided in the first sensor circuit and one resistance-dependent sensor element is provided in the second sensor circuit', 'the first and the second sensor circuits are connected, respectively, to first and second evaluating circuits which are separated from each other and which bring about an interruption of the driver circuit by means for switch-off when a system-specific limit resistance value of the first resistant-dependent sensor element or the one resistance-dependent sensor element associated with the second sensor circuit is reached, in order to thereby switch the stator windings of the motor to a currentless state., 'a first ...

MEMORY SHORT PROTECTION SYSTEM

Memory short detection systems and methods include a power supply system with first power rail. A memory system includes a memory device connector that is configured to couple to a memory device and includes a first pin that is coupled to the first power rail and a second pin located adjacent the first pin. A short detection circuit is coupled to the first pin. The short detection circuit is configured to provide a first voltage from the first power rail, compare the first voltage to a first short detection voltage, and determine whether a short exists across the first pin and the second pin based on the comparing of the first voltage to the first short detection voltage. If a short is determined to exist across the first pin and the second pin, power is prevented from being provided to the memory device connector. 1. A short protection system , comprising:a device connector that includes a first pin and a second pin that is located adjacent the first pin, wherein the first pin is coupled to a first power rail; provide a first voltage from the first power rail;', 'compare the first voltage to a first short detection voltage;', 'determine whether a short exists across the first pin and the second pin based on the comparing of the first voltage to the first short detection voltage; and', 'prevent power from being provided to the device connector in response to determining a short exists across the first pin and the second pin., 'a short detection circuit coupled to the first pin, wherein the short detection circuit is configured to2. The short protection system of claim 1 , wherein the second pin is either coupled to a second power rail or to ground.3. The short protection system of claim 1 , wherein the short detection circuit includes a first resistor network that is coupled to the first pin and that is configured to provide the first voltage.4. The short protection system of claim 1 , wherein the short detection circuit includes an isolation device that is coupled ...

THERMAL PROTECTOR

A thermal protector including a body integrally connected to a magnet wire terminating feature. 1. A thermal protector comprising:a body integrally connected to a magnet wire terminating feature.2. The thermal protector of claim 1 , wherein the body and the magnet wire terminating feature are of unitary construction.3. The thermal protector of claim 1 , wherein the body and the magnet wire terminating feature have a crimp connection.4. A thermally protected bobbin comprising:a magnet wire wound onto a spindle; anda thermal protector comprising a body integrally connected to a magnet wire terminating feature;wherein the magnet wire terminating feature forms a connection with the magnet wire.5. The thermal protector of claim 4 , wherein the body and the magnet wire terminating feature have a crimp connection.6. A thermally protected bobbin comprising:a magnet wire having opposed ends wound onto a spindle, the spindle having a splice opening for receiving the magnet wire between the opposed ends; anda thermal protector comprising a body integrally connected to a magnet wire terminating feature;wherein each magnet wire terminating feature is received by a corresponding splice opening, each magnet wire terminating feature forming a connection with the magnet wire.7. The thermally protected bobbin of claim 6 , wherein the body and the magnet wire terminating feature are of unitary construction.8. The thermally protected bobbin of claim 6 , wherein the splice opening having a post for receiving the magnet wire subsequent to the magnet wire extending through the splice opening claim 6 , the post being removed during or subsequent to the magnet wire terminating feature forming a connection with the magnet wire.9. The thermally protected bobbin of claim 8 , wherein a magnet wire segment extending between each magnet wire terminating feature is removed from the spindle. The present invention is directed to bobbins for carrying magnet wire, and in particular, the invention is ...

PACKAGE MODULE OF BATTERY PROTECTION CIRCUIT

The present invention pertains to a package module of a battery protection circuit, and the package module of the battery protection circuit according to the present invention comprises: a first internal connection terminal area and a second internal connection terminal area, which are respectively disposed at both edge parts thereof, and in which first and second internal connection terminals connected to a battery can provided with a bare cell are respectively disposed; an external connection terminal area, which is adjacent to the first internal connection terminal area, and in which a plurality of external connection terminals are disposed; and a protection circuit area comprising a device area in which a plurality of passive devices forming the battery protection circuit are disposed and a chip area, which is adjacent to the device area, and in which a protection IC and a dual FET chip forming the battery protection circuit are disposed, are disposed between the external connection terminal area and the second internal connection terminal area, and has a packaged structure to expose the plurality of external connection terminals on the upper surface thereof and expose the first internal connection terminal and the second internal connection terminal on the lower surface thereof. According to the present invention, a manufacturing process is minimized when compared with existing methods requiring a separate module manufacturing process, and a battery pack is easily formed and is able to be miniaturized and integrated. 1. A package module of a battery protection circuit , the package module comprising:first and second internal connection terminal areas individually disposed at two side edges of the package module and for respectively disposing first and second internal connection terminals to be connected to a battery can including a bare cell;an external connection terminal area adjacent to the first internal connection terminal area and for disposing a ...

Electronic equipment item comprising a housing and at least one electronic board protected against lightning

An electronic equipment item for an electronic system, comprising a housing, a backplane board, at least one daughterboard and at least one lightning protection board housed in the housing. A connector is fixed to the backplane board and configured to be connected to the rest of the electronic system. For each daughterboard there is provided one lightning protection board. For each lightning protection board, a first port is arranged to connect the lightning protection board to the backplane board, and a second port is arranged to connect the daughterboard to the lightning protection board.

DEVICE AND METHOD FOR TESTING THE OPERATION OF A PROTECTION UNIT AND PROTECTION UNIT COMPRISING SUCH A TEST DEVICE

A device for testing the operation of a protection unit of an electrical network. The test device includes a generator for generating a pulse train in a secondary winding of a current transformer according to a profile of frequencies such that a measurement of the pulse train after passage through a low-pass filter is lower than a selected trip threshold, and a processing circuit arranged to identify a presence of the pulse train in a signal delivered by a second secondary winding of the current transformer. A protection unit including such a test device and to a method for testing an electrical protection unit. 1. A device for testing the operation of a protection unit of an electrical network , said protection unit comprising:a current transformer composed of a magnetic circuit positioned around at least one current conductor through which a primary current flows forming a primary circuit, said transformer comprising a first secondary winding wound around the magnetic circuit;a measurement circuit, connected to the first secondary winding, including a low-pass filter, and arranged to filter and to deliver, after filtering, a signal that is representative of the primary current and to deliver a measurement of the primary current; anda trip circuit, linked to the measurement circuit, including means for selecting a trip threshold,wherein said test device comprises:a second secondary winding wound around the magnetic circuit;a generator, linked to the trip circuit so as to acquire the selected trip threshold, arranged to generate a pulse train in the second secondary winding according to a profile of frequencies such that the measurement of the pulse train after passage through the low-pass filter is lower than the selected trip threshold; anda processing circuit, connected to the measurement circuit and to the generator, arranged to identify a presence of the pulse train in the signal that is representative of the primary current.2. The test device according to ...

Arcing fault and ground fault interrupting device for branch circuits and extensions

A fault detection device for an electrical distribution system comprises a single arcing fault detection device which can be shared among a plurality of branch circuits. A scanning device is connected to the arcing fault detection device. A line conductor from each of the branch circuits is provided to the arcing fault detection device. A current transformer is provided for each branch circuit to monitor its line conductor and to provide an output signal to the scanning device. the scanning device polls each current transformer for an output signal for a selected number of cycles and provides the output signal to the arcing fault detection device. The arcing fault detection device analyzes the output signals and, upon detection of an arcing fault condition in a branch circuit, shunts the line conductor of that branch circuit to ground via a resistance to induce ground fault condition in the ground fault interrupting device for that branch circuit.

Test circuit for an AFCI/GFCI circuit breaker

A novel toroidal core current sensor for an AFCI/GFCI Circuit Breaker and a test circuit configuration based thereon is disclosed. The current sensor has a plurality of load current conductors extending therethrough. One of the conductors carrying a load current has a portion of the load current shunted outside the core through a shunt conductor which is connected in parallel with one of the load current conductors. The secondary of the transformer outputs a current value proportional to and substantially less than the load current which may be, for example, detected by a control circuit which compares the current value against predetermined stored criteria and operates a circuit breaker accordingly. In the test circuit a power source and a waveform generator are provided for operating an AFCI\GFCI circuit breaker having the shunted current sensor and injecting test signals into a terminal of the circuit breaker. The unique properties of the shunted current sensor permit a wide range of fault conditions to be applied at low signal power because of the relatively high sensitivity the shunted current sensor provides to the AFCI\GFCI circuit breaker.

Identification system

A system for identifying the relative location of devices.

Ground short circuit detection device

FIELD: electricity. SUBSTANCE: ground short circuit detection device injects voltage with the frequency different from nominal between neutral point of synchronous three-phase electric machine and ground and measures resultant currents at two measurement points different from each other. Ground short circuit is determined on the basis of resultant current. EFFECT: improving accuracy. 10 cl, 13 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 424 610 (13) C2 (51) МПК H02H 3/17 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2009107851/07, 15.08.2007 (24) Дата начала отсчета срока действия патента: 15.08.2007 (73) Патентообладатель(и): АББ РИСЁЧ ЛТД (CH) (43) Дата публикации заявки: 27.09.2010 Бюл. № 27 2 4 2 4 6 1 0 (45) Опубликовано: 20.07.2011 Бюл. № 20 (56) Список документов, цитированных в отчете о поиске: WO 00/77906 A, 21.12.2000. RU 2014702 C1, 15.06.1994. RU 2246161 C1, 10.02.2005. SU 896712 A1, 07.01.1982. 2 4 2 4 6 1 0 R U (86) Заявка PCT: SE 2007/000724 (15.08.2007) C 2 C 2 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 18.03.2009 (87) Публикация заявки РСТ: WO 2008/020798 (21.02.2008) Адрес для переписки: 191186, Санкт-Петербург, а/я 230, "АРСПАТЕНТ", пат.пов. М.В.Хмаре, рег. № 771 (54) УСТРОЙСТВО ДЛЯ ОПРЕДЕЛЕНИЯ ЗАМЫКАНИЯ НА ЗЕМЛЮ (57) Реферат: Использование: в области электротехники. Технический результат заключается в повышении точности. Устройство для определения замыкания на землю инжектирует напряжение с частотой, отличной от номинальной, между точкой нейтрали синхронной трехфазной электрической машины и землей и измеряет результирующие токи в двух точках измерения, отличных друг от друга. Замыкание на землю определяется на основе результирующего тока. 3 н. и 7 з.п. флы, 13 ил. Ñòð.: 1 ru R U Приоритет(ы): (30) Конвенционный приоритет: 18.08.2006 EP 06445061.2 (72) Автор(ы): ЙОХАНССОН Стефан Г. (SE), ФУЛЬЧИК Марек (PL), БЕНГТССОН Торд (SE), ЛИНДАЛ ...

Fault current circuit breaker

本发明涉及一种故障电流保护开关(1)，该故障电流保护开关包含至少一个总加电流互感器(2)，待保护的电网的至少一个第一导体(15)和至少一个第二导体(16)引导穿过所述至少一个总加电流互感器，其中，在总加电流互感器(2)上布置有至少一个次级线圈(17)，其中，该次级线圈(17)与至少一个储能元件(5)至少间接地有效连接，其中，至少一个放电电阻(4)与储能元件(5)并联，其中，所述故障电流保护开关(1)具有触发器(7)，该触发器与至少一个第一导体(15)和至少一个第二导体(16)中的分离触点有效连接，为了减少待保护电网的突然断电而提出，至少一个放电电阻(4)由第一分电阻(4a)和至少一个与该第一分电阻串联的第二分电阻(4b)形成，并且至少一个第一电气信号装置(20)至少间接地与第一分电阻(4a)有效连接。

CIRCUIT BREAKER CIRCUIT BREAKER

1. Автоматический выключатель (1) для защиты от тока утечки, содержащий по меньшей мере один преобразователь (2) суммарного тока, через который пропущены по меньшей мере один первый проводник (15) и один второй проводник (16) защищаемой сети, причем в преобразователе (2) суммарного тока установлена по меньшей мере одна вторичная обмотка (17), причем вторичная обмотка (17) опосредованно кинематически соединена с энергоаккумулирующим элементом (5), причем по меньшей мере одно разрядное сопротивление (4) включено параллельно энергоаккумулирующему элементу (5), причем автоматический выключатель (1) для защиты от тока утечки содержит размыкатель (7), кинематически соединенный с размыкающими контактами по меньшей мере в первом проводнике (15) и по меньшей мере во втором проводнике (16), отличающийся тем, что по меньшей мере одно разрядное сопротивление (4) образовано первой секцией (4а) сопротивления и по меньшей мере одной секцией (4b) сопротивления, включенной последовательно с первой, и что по меньшей мере одно первое электрическое сигнальное средство (20) по меньшей мере опосредованно кинематически соединено с первой секцией (4а) сопротивления. ! 2. Автоматический выключатель (1) для защиты от тока утечки по п.1, отличающийся тем, что первое электрическое сигнальное средство (20) по меньшей мере опосредованно включено параллельно первой секции (4а) сопротивления. ! 3. Автоматический выключатель (1) для защиты от тока утечки по п.1 или 2, отличающийся тем, что первое электрическое сигнальное средство (20) выполнено в виде оптического электрического сигнального средства, предпочтительно в виде первого электрического светящегося тела (8). ! 4. Ав� РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2011 101 389 (13) A (51) МПК H02H 3/04 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (71) Заявитель(и): ИТОН ГМБХ (AT) (21)(22) Заявка: 2011101389/07, 27.04.2009 Приоритет(ы): (30) Конвенционный приоритет: 18.06.2008 AT A977/2008 (85) Дата начала ...

Branch circuit monitor system

A branch circuit monitoring system includes a plurality of current sensor modules that are installable in a panelboard. Each of the current sensor modules may be associated with a respective one of a plurality of branch circuits included in the panelboard. Each of the current sensor modules may include a current sensor, operating logic and a communication module. The current sensor may measure a power parameter of the respective branch circuit associated therewith. The operating logic may be coupled with the current sensor and the communication module, and may direct the overall functionality of the current sensor module. The communication module may be operable to communicate with a device external to the current sensor module.

Electric leakage crossing gate with device for sensing electric spark

본 고안은 전기 스파크감지장치를 갖는 누전차단기에 관한 것으로서, 더욱 상세하게는 누전차단기의 동작회로의 시험용 버튼스위치 선로에서 전선을 인출하여 단자를 삽입 연결하고 그 단자에 누전차단기의 본래기능 외에 별도기능을 가진 기구를 삽입 연결할 수 있도록 기존의 누전차단기에서 해결할 수 없는 기능의 장치 즉, 무선제어장치 및 전기 선로의 접속불량에 의한 스파크 감지장치 등을 연결하여 사용함으로써, 전기 선로에서 발생하는 재해를 미연에 방지할 수 있도록 한 전기 스파크감지장치를 갖는 누전차단기에 관한 것이다. The present invention relates to an earth leakage circuit breaker having an electrical spark detection device, and more particularly, a wire is drawn out from a test button switch line of a test circuit of an earth leakage circuit breaker, and a terminal is inserted and connected to the terminal. By connecting and using a device having a function that cannot be solved by an existing earth leakage breaker, such as a radio control device and a spark detection device due to a poor connection of an electric line, an accident occurring in an electric line can be prevented. An earth leakage circuit breaker having an electrical spark detection device capable of preventing the same. 이를 위해, 본 고안은 누전감지회로장치의 시험용 버튼스위치의 접점회로에 연결 설치된 별도기능장치 연결단자와; 상기 단자에 연결된 별도기능에 필요한 외부연결장치;를 포함하여 구성되고, 상기 별도기능의 외부연결장치가 동작하면 단자회로가 온 되게 하여 누전차단기가 오프되는 것을 특징으로 하는 전기 스파크감지장치를 갖는 누전차단기를 제공한다. To this end, the present invention is connected to a separate functional device connecting terminal installed in the contact circuit of the button switch for the test of the earth leakage detection circuit device; An external connection device necessary for a separate function connected to the terminal; and an electric leakage detecting device having an electrical spark detection device, characterized in that the circuit breaker is turned off by turning on the terminal circuit when the external connection device of the separate function operates. Provide a breaker. 누전차단기, 별도기능장치 연결단자, 외부연결장치 Earth leakage breaker, separate function device connection terminal, external connection device

Aircraft electronic circuit breaker, using computer generated single processing chain for load output control

Le dispositif électronique (10) de disjonction, comporte au moins deux sorties (22) adaptées pour être connectées à des charges, chaque sortie (22) étant associée à un organe propre de commutation (16) adapté pour assurer l'alimentation de la sortie associée (22) en fonction d'un signal de commande, et des moyens (14) de commande desdits organes de commutation (16) comportant, pour chaque sortie (22), un capteur (30) du courant fourni à la charge et des moyens de traitement adaptés pour fournir, pour chaque organe de commutation (16), ledit signal de commande en fonction du courant fourni à la charge. Ces moyens de traitement comportent une unique chaîne de traitement (40), laquelle chaîne de traitement (40) comporte au moins un élément (70) de traitement commun à chacune des sorties (22). Application au dispositif de jonction pour avion.

DEVICE AND METHOD FOR PROTECTING A CONNECTION OF A MEDIUM, HIGH OR VERY HIGH VOLTAGE ELECTRICAL NETWORK.

L'invention concerne un dispositif et un procédé de protection d'une liaison d'un réseau électrique moyenne, haute ou très haute tension, des transformateurs de courant et de tension et des circuits de déclenchement étant disposés sur cette liaison. Ce dispositif comprend des moyens de raccordement direct à une alimentation, aux transformateurs de courant et de tension et aux circuits de déclenchement via des liaisons analogiques (12) et des moyens de conversion analogique-numérique reliés à une unité centrale de traitement via une liaison numérique (21), les moyens de conversion analogique-numérique (25) comprenant une fonction prise test intégré. The invention relates to a device and a method for protecting a link of a medium, high or very high voltage electrical network, current and voltage transformers and tripping circuits being arranged on this link. This device comprises means for direct connection to a power supply, to current and voltage transformers and to trip circuits via analog links (12) and to analog-to-digital conversion means connected to a central processing unit via a digital link. (21), the analog-to-digital converting means (25) comprising an integrated test taking function.

VOLTAGE MEASURING DEVICE.

DEVICE AND METHOD FOR PROTECTING A CONNECTION OF A MEDIUM, HIGH OR VERY HIGH VOLTAGE ELECTRICAL NETWORK.

CIRCUIT BREAKER WITH DIGITAL STATIC TRIGGER PROVIDED WITH A CALIBRATION CIRCUIT

DECLENCHEUR STATIQUE A MICROPROCESSEUR 48 DE TRAITEMENT DE SIGNAUX NUMERIQUES DERIVES DE SIGNAUX ANALOGIQUES DELIVRES PAR DES CAPTEURS DE COURANT 16. LES SIGNAUX ANALOGIQUES SONT APPLIQUES A UN CIRCUIT DE CALIBRAGE 34, QUI ADAPTE LA DYNAMIQUE DE SORTIE DESCIRCUITS ANALOGIQUES A CELLE DES CIRCUITS LOGIQUES, POUR OBTENIR AVEC UN CONVERTISSEUR ANALOGIQUE DIGITAL 50 A 8BITS ASSOCIES A UN MULTIPLEXEUR 29 UNE DYNAMIQUE EQUIVALENTE A DES CHAINES A 12BITS.

SWITCHBOARD.

Electronic thermal protection device.

La présente invention concerne un dispositif électronique de protection thermique destiné à interrompre l'alimentation sur une ligne polyphasée (L1 , L2 , L3 ), comprenant un détecteur thermique (1) doté d'un élément résistif (11) thermiquement couplé à un capteur de température (14), celui-ci étant connecté à un circuit numérique de traitement (3) apte à fournir un ordre de commande en fonction de la surcharge détectée par le capteur de température (14) et caractérisé par le fait que l'élément résistif (11) du détecteur thermique est connecté aux différents redresseurs (R1 , R2 , R3 ) alimentés chacun par un transformateur d'intensité (Ti1 , Ti2 , Ti3 ) installé sur un fil de ligne de manière que ledit élément résistif (11) soit parcouru par la somme des courants (i2 ) délivrés par les redresseurs (R1 , R2 , R3 ). The present invention relates to an electronic thermal protection device intended to interrupt the supply on a polyphase line (L1, L2, L3), comprising a thermal detector (1) provided with a resistive element (11) thermally coupled to a sensor. temperature (14), the latter being connected to a digital processing circuit (3) capable of supplying a control command as a function of the overload detected by the temperature sensor (14) and characterized in that the resistive element (11) of the thermal detector is connected to the various rectifiers (R1, R2, R3) each supplied by an intensity transformer (Ti1, Ti2, Ti3) installed on a line wire so that said resistive element (11) is traversed by the sum of the currents (i2) delivered by the rectifiers (R1, R2, R3).

CIRCUIT BREAKER WITH DIGITAL STATIC TRIGGER PROVIDED WITH A CALIBRATION CIRCUIT

Protective device for polyphase electrical networks

Inrush current suppressor circuit

Disclosed is an inrush current suppressor circuit of a power supply circuit that supplies stand-by voltage from AC voltage. At a stand-by mode, only a diode and a resistor for suppressing inrush current are provided, and a capacitor provided in common between a stand-by power supply part and a start-up power supply part is charged, so that the inrush current is suppressed at both of stand-by and start-up modes and the number of devices of a circuit and power consumption are reduced.

Electric board, has phase disconnection circuit with magnetic detection unit detecting short-circuit in circuits, and control units controlling opening of interrupters in case of overload defect in one of circuits

The board has starting devices (2) with electric phase protection circuits (6) electric load detection units (9) controlling interrupter control units (15) respectively. A main device (1) has a differential detection unit (12) and a phase disconnection circuit (4) with magnetic detection unit (16) detecting a short-circuit in the circuits (6). The units (12, 16) open interrupters (7, 8) of the device (1), in case of a differential or short-circuit defect in one of the circuits (6). The units (15) control the opening of the interrupters in case of an overload defect in one of the circuits.

A display apparatus

본 실시예에 따른 영상표시장치는 영상이 표시되는 피디피 모듈로 서스테인 전압을 공급하는 Vs 출력부; 상기 Vs 출력부의 동작을 제어하는 보호 회로; 상기 Vs 출력부를 통하여 출력된 서스테인 전압으로부터 전류 성분을 검출하는 전류 검출부; 및 상기 전류 검출부를 통하여 출력되는 신호를 적분하는 적분회로가 구비되고, 상기 적분회로에 의해서 연산되는 누적값으로부터 상기 보호 회로의 동작을 제어하는 마이컴;이 포함된다. 영상표시장치

Apparatus for detecting arcing faults and ground faults in multiwire branch electric power circuits

A multiwire branch circuit including two line conductors and a grounded, common neutral conductor is protected by a two pole circuit breaker connected to interrupt current flow in the two ungrounded line conductors. Three separate protection circuits provide arc fault protection for each of the ungrounded line conductors and ground fault protection for all three conductors. The arc fault detectors use the bimetal of the thermal-magnetic trip device for the associated line conductor, and therefore, are individually referenced to the associated line voltage. Hence, the outputs of the arc fault detectors are electrically isolated from each other and from the output of the ground fault detector, but operate a common trip circuit to open the two pole circuit breaker. The arc fault detectors have separate isolated power supplies. The ground fault detector is powered by a supply which is energized if either of the ungrounded line conductors is energized.

ELECTRONIC EQUIPMENT COMPRISING A CASE AND AT LEAST ONE ELECTRONIC CARD PROTECTED AGAINST LIGHTNING

Current transformer for protecting the neutral of a four-pole protective electrical apparatus

In a four-pole circuit breaker with electronic trip the current transformer associated with the neutral pole 10N includes two coils 32, 34 whose ends 36 to 42 are accessible. A connection system enables these ends 36 to 42 to be interconnected in order to produce selectively, either a series connection of the coils 32, 34, or a parallel connection, or a short-circuit connection. These three types of connection enable three types of protection to be produced, in this instance a protection identical to that of the phases, a neutral protection half that of the phases and no protection of the neutral.

Device and method for protecting a link in a medium-, high- or very high-voltage electric network

The invention relates to a device and to a method for protecting a link in an electric network. Said device further includes: a base portion (31, 61) connected to the supply voltage, to the current and voltage transformers, and to the trip circuits; an active portion (30, 60) provided with at least one socket (35, 67) that can be inserted onto the base portion; and a test portion (40, 60) for injecting currents and voltage, which can be inserted onto a socket of the active portion.

An apparatus for protecting a subscriber line interface circuit against overvoltages

An apparatus for protecting a subscriber line interface circuit (1) against overvoltages occurring on its two input wires (A, B) and exceeding the voltage of the supply voltage source of the subscriber line interface circuit (1). A resistor (RA, RB) is connected in series with a respective input wire (A, B) to respective input terminals (LA, LB) of the subscriber line interface circuit. Each input terminal (LA, LB) is connected to the anode of a respective first diode (DA1, DB1), whose cathode is connected to the positive terminal of the supply voltage source, and also to the cathode of a respective second diode (DA2, DB2). The anodes of the second diodes are connected to the cathode of a thyristor (TAB) which is common to the second diodes. The anode of the thyristor is connected to the positive terminal of the supply voltage source and the gate of the thyristor is connected to the negative terminal of the supply voltage source.

Battery protection circuit package module

Method and apparatus for fault condition detection in the power supply to a load

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur Detektion von Fehlerzuständen bei der Energieversorgung einer Last, beispielsweise einer Detektion eines Drahtbruches oder eine Detektion des Vorliegens von Überlastzuständen. Dabei wird ein Spannungsabfall an einem Messwiderstand ausgewertet, welcher in einem Messsignalweg angeordnet ist, der parallel zum Hauptsignalweg verläuft. Der Messsignalweg wird nur kurzzeitig aktiviert, so dass die entstehende Verlustleistung klein ist. The invention relates to a method and a device for detecting fault conditions in the power supply of a load, for example a detection of a wire break or a detection of the presence of overload conditions. In this case, a voltage drop is evaluated at a measuring resistor, which is arranged in a Meßsignalweg, which is parallel to the main signal path. The measurement signal path is only activated for a short time, so that the resulting power loss is small.

Electronic circuit breaker system

Ground Fault Detection

The present invention relates to a ground fault detection arrangement for a synchronous three-phase electrical machine, and an electrical system comprising a ground fault detection arrangement and a synchronous three-phase electrical machine. The ground fault detection arrangement injects an off-nominal frequency voltage between a neutral point of the synchronous three-phase electrical machine and ground and measure resultant currents to detect a ground fault.

Earth fault circuit breaker

ABSTRACT An earth fault circuit breaker (10) for use in a circuit including an AC power supply and a load (11), which circuit breaker comprises a current-to-voltage converter (12) having two transformers for monitoring the current before and after flowing through the load J a leakage current/ voltage detector (13A) for processing the outputs (E1 & E2) of the transformers to produce a resultant voltage, a voltage comparator (16) for comparing the said resultant voltage with a predetermined reference voltage to determine if there is a difference between the two transformer outputs, which is caused by an earth fault appearing at the load, and a switching driver (14) for disconnecting the load from the power supply in response to such a difference between the two transformer outputs exceeding the predetermined reference voltage, wherein each transformer has first and second primary windings (P1 & P2) arranged to be connected to opposite sides of the load and the two transformers are arranged to provide outputs at their respective secondary windings (S), corresponding to the normal load current (I2), in a substantially anti-phase relationship. The circuit breaker (10) may optionally include another voltage comparator (21) to detect overload current by monitoring the output of either one of the transformers.

Electronic device for thermal protection

DEVICE FOR PROTECTING A SUBSCRIBER INTERFACE AGAINST OVERVOLTAGE

Package module of battery protection circuit

本发明涉及一种电池保护电路的封装模块，并且根据本发明的电池保护电路的封装模块包括：第一内部连接端子区域和第二内部连接端子区域，其分别布置在其两个边缘部分，并且其中分别布置连接到具备裸电池的电池壳的第一和第二内部连接端子；外部连接端子区域，其与第一内部连接端子区域相邻，并且其中布置多个外部连接端子；以及保护电路区域，其包括：器件区域，其中布置形成电池保护电路的多个无源器件，以及芯片区域，其与器件区域相邻，并且其中布置形成电池保护电路的保护IC和双FET芯片，所述保护电路区域布置在外部连接端子区域和第二内部连接端子区域之间，并且具有封装结构，以使多个外部连接端子在其上表面上裸露，并且使第一内部连接端子和第二内部连接端子在其下表面上裸露。根据本发明，当与需要分开的模块制造工艺的现有方法相比较时使制造工艺最小化，并且容易地形成电池组，并且能够使电池组小型化和集成。

Inrush current suppressor circuit

본 발명은 교류 전원으로부터 대기 전원 공급이 가능한 전원 공급 회로의 돌입 전류 제한 회로에 관한 것으로서 특히 대기 모드 시에 돌입 전류 제한을 위한 다이오드 및 저항만을 배치시키고, 대기 전원 공급부 및 기동 전원 공급부에 공통하는 커패시터를 충전시킴으로써, 대기 모드 및 기동 모드에 모두 돌입 전류가 제한되도록 하면서 회로의 소자 개수 및 소비 전력을 감소시킬 수 있다.

AC / DC sensitive residual current protective device and method for detecting a residual current

The invention relates to two evaluation principles for detecting both a continuous d.c. fault current and a changing fault current/pulsating d.c. fault current independently of one another, using only one summation current transformer (4). The induction principle is used to detect the changing fault current and the principle known as controlled induction is used to detect the d.c. fault current. The residual current device (2) is characterised by the bipolar control of a control winding (6) together with a generator (16). The selection of a specific core material for the summation current transformer (2) and the special circuit arrangement ensure the effectiveness and reliability of the residual current device.

Leakage circuit breaker

Switching equipment protected from interference arc distribution

Circuit arrangement for controlling a load and for recognizing a line interruption

A circuit arrangement for controlling a load and for recognizing an interruption in a line to the load includes a measuring resistance connected in series with the load, a device for varying a resistance value of the measuring resistance as a function of a current passing through the load, and a diagnostic device for generating a diagnosis signal if a voltage drop, producible across the measuring resistance by a load current drops below a threshold value.

ALL-POWER-SENSITIVE FAULT CURRENT PROTECTION DEVICE

Residual-current circuit breaker

A residual-current circuit breaker includes at least one summation current transformer through which at least one first lead and one second lead of a network to be protected are guided. At least one secondary winding is arranged on the summation current transformer and operatively connected at least indirectly with at least one energy storage element. At least one discharging resistor is switched in parallel with the energy storage element. The residual-current circuit breaker has a trip element which is operatively connected with break contacts in the at least one first lead and the at least one second lead. In order to reduce unexpected cut-offs of a network to be protected, the at least one discharging resistor includes a first partial resistor, and a second partial resistor switched in series with respect to the first partial resistor, with a least one electric signaling device operatively connected, at least indirectly, with the first partial resistor.

Electronic device comprising a housing and at least one electronic card protected against lightning

Device for the AC/DC sensitive detection of differential currents

The device has a primary conductors (16-19) running between input contacts (8-11) and output contacts (12-15). The conductors are conducted through a passage region of an alternating current/direct sensitive sum current transformer. The transformer is arranged such that a central axis of the transformer is oriented parallel to the direction of a distance (15a) between the rows of input and output contacts.

Fault current circuit breaker

Supraconductive coil transition detector

The invention relates to a supraconductive coil transition detector comprising means for disconnecting the detector directly before a coil discharge phase. The detector comprises a resistive divider (R1, R2) arranged in parallel on the supraconductive coil (1), the middle point A of the supraconductive coil and the middle point (B) of the resistive divider being connected to the two inlets of a threshold comparator. The connection means comprise switches (31-33) arranged on the connections between the coil and the detector, and means for opening said switches as soon as the comparator supplies a signal above a threshold.

Improvements in electrical protection and control systems

A protection and control system incorporates status acquisition apparatus (100) for use in monitoring the status of a device in the protection and control system, such as a protection relay in a high voltage electrical circuit. The status acquisition apparatus comprises an conversion circuit (101) which converts an input voltage to a pulse width modulated signal and a comparison circuit (103) which monitors the pulse width modulated signal to determine the status of the device. The mark- space ratio of the pulse width modulated signal decreases as the input voltage is increased to minimise power dissipation over a range of input voltages. The status acquisition apparatus may form an integral part of a protective switching device, although other applications are envisaged.

Electrical device

Protective relay

Disclosed is a protective relay which carries out various relay functions by converting externally received AC data into time widths in accordance with protective ranges and determining whether or not the protective operations are necessary on the basis of the time widths. The protective relay receives a plurality of input AC data (A1, B1, C1, A2, B2, C2; A, B, C, ..., N, A', B', C', ..., N'; A, B, ..., N) through a time-dividing device (20, 202, 202') and converts the time-divided data into the time widths for the relay functions to determine the relay operations of the relay functions on basis of the time widths.

An apparatus for protecting a subscriber line interface circuit against overvoltages

Overtemperature protection

Die vorliegende Erfindung betrifft eine Schutzschaltung (1) zum Schutz vor Überhitzung der Statorwicklungen (U, V, W) eines EC-Motors (M) die mit einer Halbleiter-Endstufe (2) verbunden sind, die über eine Treiberschaltung (7) von einer elektronischen Kommutierungssteuerung zum zeitlich versetzten Ansteuern der Statorwicklungen (U, V, W) des Motors (M) zwecks Erzeugung eines magnetischen Drehfeldes ausgebildet sind, dadurch gekennzeichnet, dass die Schutzschaltung (1) mit zwei redundante Sensorkreisen (10, 20) ausgebildet ist, wobei im ersten Sensorkreis (10) zwei in Reihe geschaltete widerstandsabhängige Sensorelemente (11, 12) und im zweiten Sensorkreis (20) ein widerstandsabhängiges Sensorelement (21) vorgesehen sind, wobei der erste und zweite Sensorkreis (10) mit je zwei jeweils voneinander getrennten Auswerteschaltungen (30, 31) bzw. (40, 41) verbunden sind, die bei Erreichen eines systemspezifischen Grenz-Widerstandswertes des jeweilig dem Sensorkreis zugeordneten Sensorelementes (11, 12) bzw. (21) eine Unterbrechung der Treiberschaltung (7) vorzugsweise über Abschaltmittel bewirken, um dadurch die Statorwicklungen (U, V, W) des Motors (M) stromlos zu schalten. The present invention relates to a protective circuit (1) for protection against overheating of the stator windings (U, V, W) of an EC motor (M) which are connected to a semiconductor output stage (2) via a driver circuit (7) of a electronic Kommutierungssteuerung for staggered driving of the stator windings (U, V, W) of the motor (M) are designed to generate a rotating magnetic field, characterized in that the protective circuit (1) with two redundant sensor circuits (10, 20) is formed in the first sensor circuit (10) two series-connected resistance-dependent sensor elements (11, 12) and in the second sensor circuit (20) a resistance-dependent sensor element (21) are provided, wherein the first and second sensor circuit (10) each with two each separate evaluation circuits ( 30, 31) or (40, 41) are ...

Electrical switching apparatus employing interlocks for first and second trip functions

A circuit breaker includes separable contacts for movement between a closed position and an open position. An operating mechanism, which moves the separable contacts between the closed and open positions, has a closed state and an open or tripped state which corresponds to the open position. A current transformer senses electrical current flowing through the separable contacts as a sensed current. A trip mechanism employs the sensed current for tripping the operating mechanism to the tripped position to move the separable contacts to the open position. The trip mechanism includes a microprocessor which generates short delay and ground fault trip functions of electrical current and time. The microprocessor inputs a first interlock signal from a downstream electrical switching device which generates the first interlock signal with a first value when current through the downstream device exceeds a predetermined value and with a second value otherwise. The microprocessor generates and outputs a second interlock signal to an upstream electrical switching device in response to both of the first and second trip functions. The trip mechanism selectively trips the operating mechanism as a function of the first interlock signal, the first trip function, and the second trip function.

Undervoltage sensing circuit

Thermally protected bobbin assembly

Power converter, X-ray CT apparatus, and X-ray imaging apparatus

Arc fault detector with circuit interrupter and early arc fault detection

An arc fault detector comprised as a stand alone unit and in combination with a ground fault circuit interrupter (GFCI) functions to provide protection from potentially dangerous arc fault conditions. When combined with a GFCI, the combination arc fault/ground fault circuit interrupter (AFCI/GFCI) provides protection from both arc fault and ground fault conditions. A single transformer is used to detect faults between neutral and ground and arc faults. An impedance splits the current flow into two portions so as to generate differential current proportional to the current flowing through the conductors. An early arcing detector periodically tests the AC line for high impedance between the device and a main breaker panel. The AFCI/GFCI device detects both AC line frequencies and high frequencies associated with arcing. Both average and instantaneous values of both AC line frequency and high frequency arcing signals are processed to generate an arc fault signal. The device allows the arc detector to differentiate between destructive high level arcing and low level arcing such as generated by typical household appliances and equipment. This serves to decrease the occurrence of false tripping. The device also includes a timer circuit, which permits the user to temporarily disable the arc detector, and includes communication means to permit the device to communicate the occurrence and location of the arc fault to a centralized monitoring station.

Improvements in or relating to undervoltage sensing circuits

876,415. Protective arrangements. WESTINGHOUSE ELECTRIC CORPORATION. Oct. 20, 1959 [Oct. 27, 1958], No. 35454/59. Class 38 (5). [Also in Group XL (c)] An undervoltage protective arrangement comprises means connected to each phase of a polyphase system for providing a signal voltage when the corresponding phase voltage is above a predetermined value, and transistor means controlled by the signal voltages for providing an output signal in the absence of any one of the signal voltages. In Fig. 1 there is connected to each phase voltage-dividing resistors 2, 3, a rectifier 4 and a potentiometer 5, and the resulting unidirectional voltage signals normally bias rectifiers 7 to their non-conducting condition so that the bias applied to the base of a transistor 11 from a source 8 causes the transistor to conduct. Under these conditions no voltage is applied across a capacitor 13. If the voltage of any phase falls below the predetermined value, the corresponding rectifier 7 is " unblocked " so that current can flow from the source 8 through the rectifier to earth causing the transistor to become non-conductive. The resulting output signal appearing at the collector of the transistor charges the capacitor 13 until the breakdown voltage of a Zener diode 14 is reached and a control device 15 is then operated. The device 15 may be a relay, a flip-flop circuit or an amplifier. Fig. 2 (not shown) illustrates a modified circuit in which a transistor is associated with each phase.

Patent JPS3515321B1

Complex multifunctional relay system and control method therefor

The present invention relates to a complex multifunctional relay system and a control method therefor, by which a relay circuit can complexly perform functions, such as an overcurrent shutdown, an arc fault shutdown, and an electric leakage shutdown, the system comprising: an alternating current circuit including a neutral line and a hot line for supplying alternating current power to a load, such as an industrial machine; a power control means connected to the hot line in a parallel circuit; an isolated differential amplifier that is circuit-connected to each of the hot line and the neutral line through an ammeter shunt; a microprocessor which is connected to the power control means and the isolated differential amplifier to monitor the same, and controls power supply of the power control means according to the monitoring; a first comparator connected to the ammeter shunt and the isolated differential amplifier in a comparable manner, and connected to the microprocessor to check a ground fault; and a second comparator connected between the ammeter shunt, the isolated differential amplifier, and the microprocessor to check an arc fault.

Electronic device for thermal protection

Circuit breaker with digital solid-state trip unit fitted with a calibration circuit

Microprocessor-based solid-state trip unit (48) processing digital signals derived from analog signals supplied by current sensors (16). The analog signals are applied to a calibration circuit (34), which adapts the output range of the analog circuits to that of the logic circuits, to obtain with an 8-bit Analog-to-Digital Converter (50) associated with a Multiplexer (29) a range equivalent to that of 12-bit processing systems.

Trip device for a current-limiting switchgear

Arc light protecting device and its application method

本发明公开了一种弧光保护装置及其应用方法，包括主控单元和与所述主控单元相连的供电单元，本发明还包括用于检测母线弧光信号的弧光传感器和用于检测与所述母线相连的母线电源进线侧电流信号的电流检测单元，所述弧光传感器和所述电流检测单元均与所述主控单元的输入端相连，所述主控单元输出端与断路器相连。本发明采用上述结构的弧光保护装置及其应用方法，可经不同的组合方式适应不同的母线环境，拓展了应用范围，且经DSP处理器进行数据的分析判断，PIC单片机进行控制，提高了控制效率。

Electric installation structure

In order to reduce the complexity of electric installation structures and increase the safety of people and equipment, it is proposed in an electric installation structure (1), comprising an electric energy distribution network (2) and/or at least one first electrical device (3), to dispose means (4) for determining a fault source by means of blind source separation, preferably for locating at least one first electrical fault source, particularly at least one fault current source and/or a first overload region, at and/or in the electric energy distribution network (2) and/or the at least one first electrical device (3).

Device for protecting a subscriber line circuit from overvoltages

PCT No. PCT/SE95/00800 Sec. 371 Date May 8, 1996 Sec. 102(e) Date May 8, 1996 PCT Filed Jun. 28, 1995 PCT Pub. No. WO96/01015 PCT Pub. Date Jun. 28, 1995An apparatus interfaces with a subscriber line interface circuit (1) and protects the interface circuit (1) against overvoltages exceeding a supply voltage source supplied to the subscriber line interface circuit. The apparatus includes first and second diodes (DA1, DB1) having respective anodes connected to first and second input wires (A, B). The cathodes of the first and second diodes are connected to a positive terminal of the supply voltage source. The apparatus further includes third and fourth diodes (DA2, DB2) having cathodes connected the first and second input wires (A, B). The anodes of the third and fourth diodes are connected to a cathode of a thyristor (TAB). The anode of the thyristor, in turn, is connected to the positive terminal of the supply voltage source, and the gate the thyristor is connected to a negative terminal of the supply voltage source.

NUMERIC STATIC TRIGGER WITH A CIRCUIT CIRCUIT FOR CIRCUIT BREAKER

Grounding fault detection

The present invention relates to a ground fault detection arrangement for a synchronous three-phase electrical machine, and an electrical system comprising a ground fault detection arrangement and a synchronous three-phase electrical machine. The ground fault detection arrangement injects an off-nominal frequency voltage between a neutral point of the synchronous three-phase electrical machine and ground and measure resultant currents to detect a ground fault.

Leakage current detection and interruption circuit

A circuit is disclosed for disconnecting a power source upon the detection of a leakage. The circuit comprises a disconnect switch for disconnecting the power source. A primary circuit controls the disconnect switch. A secondary circuit senses a leakage current. An optical switch interconnects the primary circuit and the secondary circuit for opening the disconnect switch upon the secondary circuit sensing a leakage current. The circuit is suitable for use as a leakage current detection and interruption circuit for completely electrically disconnecting and isolating the power source and the primary circuit from the secondary circuit.

Single-element modified impedance relay

Earth fault circuit breaker

一种接地故障断路器，它包括：一电压-电流变 换器，它具有两个变压器，用于监测负载前后的电流； 一个漏电流/电压检测器，用于处理变压器的输出并 产生一个合成电压；一个电压比较器，把该合成电压 和预定参考电压进行比较以确定在变压器输出之间 是否存在一个由接地故障引起的差值；和一个开关驱 动器，当上述两变压器输出之差超过预定参考电压 时，把负载从电源断开。

Thermal protector

Dual protective relay for power systems

The relay obtains three-phase current signals from two power line sources thereof, typically two independent feeder lines. The two sets of signals are processed by a single processing means, which independently controls the circuit breakers associated with each feeder line, depending on the values of current obtained.

Electronic safety device for several circuits to be protected

Electric fuse current sensing systems and monitoring methods

Electrical current sensing and monitoring methods include connecting sensing a voltage across a conductor having a non-linear resistance such as a fuse element. The current flowing in the conductor is calculated based on at least a first detected state of the sensed voltage and a thermal equilibrium characterization of the conductor.

Electric fuse current sensing systems and monitoring methods

Electrical current sensing and monitoring methods include connecting a compensation circuit across a conductor having a non-linear resistance such as a fuse element. The compensation circuit injects a current or voltage to the conductor that allows the resistance of the conductor to be determined. The current flowing in the conductor can be calculated based on a sensed voltage across the conductor once the resistance of the conductor has been determined.