23-03-2018 дата публикации
Номер: CN0207133938U
The utility model discloses a modular electric fire monitoring detector, including electric leakage detection circuit, temperature measurement circuit, metering circuit, voltage sampling circuit, current sampling circuit and straight -through current transformer, electric leakage detection circuit mainly comprises triode, differential circuit, protection circuit, zener diode D1 and filter capacitance C2 and C4, and the differential circuit includes resistance R11, R14, R16 and R17. This modular electric fire monitoring detector, the sampling that possesses residual current and multichannel temperature is calculated, samples to voltage in the circuit and current signal to can realize multiple electric quantity signal's such as active power in the circuit, power factor, frequency calculationand demonstration simultaneously, discernment residual current and temperature sensor's the short circuit and the function that opens circuit, the electric current virtual value adopts the fu shi algorithm ...
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