Circuit breaker comprising a card interfacing with a trip device
AssigneeMerlin Gerin
InventorsVincent Corcoles, Christian Tedeschi, Alain Delvecchio, Didier Fraisse
Life of this patent
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Abstract
The interface card fixedly secured to the circuit breaker supplies information representative of the circuit breaker type and rating to a standard removable trip device. It comprises for example resistances designed to be connected in parallel to a resistance of a divider bridge defining in the trip device the instantaneous tripping threshold, modifying this threshold automatically according to the circuit breaker type and rating. The interface card can also supply the trip device with information representative of the rated current flowing in the primary winding of the current transformers fixedly secured to the circuit breaker.
Claims10
A circuit breaker comprising:
- a housing body;
- current measurement means for measuring the current flowing in conductors to be protected;
- a standard removable electronic trip device comprising a processing circuit for producing a tripping signal when the current measured by the current measurement means exceeds preset tripping thresholds;
- and an interface card, fixed to the housing body, and connected to the trip device when the trip device is located in the housing body;
- wherein the interface card comprises means representative of the circuit breaker type and/or rating and an output connector to which said means are connected, said output connector being connected to a complementary connecting device of the trip device, which is connected to the trip device processing circuit, thereby supplying the processing circuit with information representative of the circuit breaker type and/or rating.
Dependencies are inferred from the claim text.