Adaptive wide-scope dc power source output short circuit protection device
A DC power supply, output short circuit technology, applied in circuit devices, automatic disconnection emergency protection devices, emergency protection circuit devices, etc. problem, to achieve the effect of strong versatility, small number and wide range
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[0024] like figure 1 As shown, the short-circuit protection device of the present invention includes an external DC power supply 1, a short-circuit protection circuit, a protection circuit, an intermediate relay coil and an interlock circuit, and a DC load 22. The protection circuit includes a fuse FU 2 and a thermistor PTCRt3. The input terminal of the fuse FU 2 is connected to the positive polarity of the external DC power supply, the output terminal of the fuse FU 2 is connected to the input terminal of the thermistor PTCRt 3, and the on-off circuit includes the disconnect button SB1 4, the enable button SB2 5 and the holding circuit 6. The holding circuit 6 is composed of a plurality of normally open contacts of intermediate relays, the input terminal of the disconnect button SB1 4 is connected to the output terminal of the thermistor PTCRt 3, and the output terminal of the disconnect button SB1 4 is connected to the input terminal of the activation button SB2 5 , the norm...
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