Bridge circuit based on direct current insulation monitoring
The utility model discloses a bridge circuit based on direct current insulation monitoring, which comprises a contactor KM and switches K1, K2 and K3 arranged in parallel, the positive electrode of the contactor KM is respectively connected with a resistor R1 and a resistor R3, the negative electrod...
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The utility model discloses a bridge circuit based on direct current insulation monitoring, which comprises a contactor KM and switches K1, K2 and K3 arranged in parallel, the positive electrode of the contactor KM is respectively connected with a resistor R1 and a resistor R3, the negative electrode of the contactor KM is respectively connected with a resistor R2 and a resistor R4, the switch K2 is connected to one end of the resistor R3, the switch K3 is connected to one end of the resistor R4, and the resistor R2 is connected to the other end of the resistor R4. The switch K1 is connected between the resistor R1 and the resistor R2; a leakage current sensor and a load resistor which are arranged in parallel are connected between the positive electrode and the negative electrode of the contactor KM, and a resistor R5 and a resistor R6 are arranged at the two ends of the load resistor in parallel, the problem that on-site original monitoring and post-access monitoring cannot work at the same time is solved, |
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