Loaded multifunctional protection circuit
A protection circuit, multi-functional technology, applied in emergency protection circuit devices, emergency protection devices with automatic disconnection, circuit devices, etc., can solve the problems of personal injury, property loss, and easily damaged loads of users, and avoid electrical hidden dangers. , Anti-surge protection, the effect of preventing wrong wiring, ensuring personal and property safety
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[0016] The present invention will be further described in conjunction with the accompanying drawings and specific embodiments.
[0017] refer to figure 1 As shown, the overvoltage and overcurrent protection circuit of this embodiment is specifically: the live wire L of the alternating current is connected to an overcurrent transformer ZCT1, and the output of the overcurrent transformer ZCT1 is connected to the rectifier unit and the delay unit to the first comparison The first input terminal of IC1, the live line L and neutral line N of AC are connected to a release TK1 and a rectification bridge unit DB1 composed of 4 diodes, the output terminal of the rectification bridge unit DB1 is connected to the rectification ground Enter a thyristor SCR1 and a unit composed of step-down resistors R11, R16, R20, the middle end of the series resistors R8, R9 is connected to the second input terminal of the first comparator IC1, the series resistors R10, R8 The middle end connects a volt...
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