Back to results
US 5,083,081 AGranted
Current sensor for an electronic trip device
AssigneeMerlin Gerin
InventorsMichel Barrault, Philippe Schuster, Roland Moussanet, Raymond Bresson
Life of this patent
Estimating the term…
Abstract
A measuring sensor of an electronic trip device of a circuit breaker comprises a shunt in the form of a hollow cylinder inside which there is located an electronic processing unit, comprising an amplifier circuit and an input resistance in good thermal contact with the internal face of the cylinder.
Claims4
An alternating or direct current sensor for an electronic trip device of an electrical circuit breaker, comprising :
- a flattened input conductor and a flattened output conductor,
- a measurement shunt in the form of a hollow cylinder fitted between the faces of said input and output conductors for said current to flow axially through it,
- electronic measuring means to measure the potential difference produced in the shunt by the current flow, said electronic means having an amplifier circuit and an amplifier circuit input resistance made of the same material as said shunt, said input resistance being a printed circuit card inserted in said cylinder and held in good thermal contact with the internal face of the cylinder, to be subjected to the same temperature distribution as the shunt.
Dependencies are inferred from the claim text.