Power transformer with DC leakage protection
A power transformer, DC leakage technology, applied in transformer testing, emergency protection circuit devices, measurement of electrical variables, etc., can solve the problems of human safety hazards, leakage circuit breakers cannot detect DC leakage, and there is no safety protection circuit at the output end. The effect of improving safety, avoiding electric shock to users, and improving safety in use
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Example Embodiment
[0033] Example one:
[0034] Such as image 3 As shown, the DC variable current circuit 2 is a rectifier bridge, and the DC bidirectional leakage detection circuit 3 is composed of an induction coil Core1, an amplifier IC1, and an amplifier IC2.
[0035] The DC bidirectional leakage detection circuit 3 is an induction coil Core1 sheathed on the output terminal of the DC varying current circuit 2. The output terminal of the induction coil Core1 is connected to an operational processing circuit 8. The operational processing circuit 8 includes an amplifier IC1 and an amplifier IC2 , The first latch 1, the second latch 2, the OR gate 1, the output terminal of the amplifier IC1 is connected to the input terminal of the first latch 1, the negative input terminal of the amplifier IC1 is connected to one end of the resistor R12 through the resistor R13, and the DC bidirectional One output end of the induction coil Core1 in the leakage detection circuit 3 is connected, the positive input en...
Example Embodiment
[0037] Embodiment two:
[0038] Such as Figure 4 As shown, the DC variable current circuit 2 is a rectifier bridge, and the DC bidirectional leakage detection circuit 3 is composed of an induction coil Core1 and an amplifier IC1. The response speed of one amplifier circuit is slower than that of two amplifier circuits.
[0039] The DC bidirectional leakage detection circuit 3 is an induction coil Core1 sheathed on the output terminal of the DC varying current circuit 2. The output terminal of the induction coil Core1 is connected to an arithmetic processing circuit 8. The arithmetic processing circuit 8 includes an amplifier IC1 and a first Latch 1, the output terminal of the amplifier IC1 is connected to the input terminal of the first latch 1, the negative input terminal of the amplifier IC1 is connected to one end of the resistor R12 through the resistor R13, and the output terminal of the induction coil Core1 in the DC bidirectional leakage detection circuit 3. The amplifier T...
Example Embodiment
[0041] Embodiment three:
[0042] Such as Figure 5 As shown, the DC variable current circuit 2 is a rectifier bridge, and the DC bidirectional leakage detection circuit 3 consists of an induction coil Core1 and an amplifier IC1. The response speed of one amplifier circuit is slower than that of two amplifier circuits.
[0043] The DC bidirectional leakage detection circuit 3 includes an induction coil Core1 and an induction coil Core2 respectively sleeved on the output ends of the DC varying current circuit 2. The output ends of the induction coil Core1 and the induction coil Core2 are respectively connected to the arithmetic processing circuit 8. The operational processing circuit 8 includes an amplifier IC1, an amplifier IC2, a first latch 1, a second latch 2, an OR gate 1. The output terminal of the amplifier IC1 is connected to the input terminal of the first latch 1, and the negative input terminal of the amplifier IC1 The resistor R13 is connected to one end of the resistor ...
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