Over-temperature alarm circuit for transformer
A technology of alarm circuit and transformer, applied in the field of transformer circuit
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[0013] The present invention will be further described below in conjunction with accompanying drawing.
[0014] Such as figure 1 As shown, an over-temperature alarm circuit for transformers, including current transformer TA1, current transformer TA2, thermistor RT, diodes VD1~VD2, resistors R1~R4, capacitor C1, electrolytic capacitor C2, operational amplifier IC1 , transistor VT1, transistor VT2, speaker BL, light-emitting diode VL, switch S, battery GB,
[0015] The current transformer TA1 and the current transformer TA2 are connected to the two-phase line on the secondary side of the transformer. One end of the current transformer TA1 is connected in series with the current transformer TA2 and then connected to the positive pole of the diode VD1, and the negative pole of the diode VD1 is connected to one end of the resistor R1. , the other end of the resistor R1 is respectively connected to the positive pole of the capacitor C1, one end of the resistor R2, and pin 2 of the ...
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