Protection circuit for a circuit breaker and circuit breaker
By setting multiple power input terminals and a voltage generation unit in the air circuit breaker, the voltage with the smaller voltage amplitude is determined as the tripping voltage, which solves the problem of false tripping caused by poor contact and realizes stable operation and fast response of the circuit breaker.
CN224536912UActive Publication Date: 2026-07-21SCHNEIDER ELECTRIC IND SAS
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SCHNEIDER ELECTRIC IND SAS
- Filing Date
- 2025-07-15
- Publication Date
- 2026-07-21
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Figure CN224536912U_ABST
Abstract
Embodiments of the present disclosure provide a protection circuit for a circuit breaker and a circuit breaker, the protection circuit comprising: a first power input and a second power input adapted to receive a power input; a first voltage generating unit and a second voltage generating unit, the first voltage generating unit coupled to the first power input to generate a first voltage, the second voltage generating unit coupled to the second power input to generate a second voltage; a comparison unit coupled to the first voltage generating unit and the second voltage generating unit to receive the first voltage and the second voltage and adapted to generate an indication signal to indicate a magnitude relationship between the first voltage and the second voltage; and a voltage determining unit coupled to the first voltage generating unit, the second voltage generating unit and the comparison unit, the voltage determining unit adapted to determine a voltage with a smaller voltage amplitude between the first voltage and the second voltage as a trip voltage based on the indication signal.
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