Control circuit of multifunctional protection socket
A technology for controlling circuits and protecting sockets, which is applied to emergency protection circuit devices, circuits, emergency protection circuit devices for limiting overcurrent/overvoltage, etc., and can solve problems such as narrow protection range, low sensitivity, and single function
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[0019] Referring to the top view, the present invention includes a signal processing chip IC, a zero-sequence transformer L1, a thyristor VS1, a tripping coil L5, a rectifier circuit, a test circuit, an indicating circuit, a piezoresistor RV1 and other resistance-capacitance components. It is characterized in that the present invention also includes an overcurrent transformer L2, a reset coil L4, a thyristor VS2, a short circuit coil L3, a temperature switch ST and a piezoresistor RV2.
[0020] The signal processing chip IC adopts the FM2145 leakage protector special chip produced by Shanghai Fudan Microelectronics Co., Ltd.
[0021] One end of the secondary winding of the zero-sequence transformer L1 is connected to pin 3 of the signal processing chip IC and the positive pole of the Zener diode D5, and the other end is connected to the positive pole of the DC blocking capacitor C3, the negative pole of the Zener diode D5 and the voltage divider One end of the resistor R6 is c...
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