Solid-state trip device for a protective circuit breaker of...

Details Solid-state trip device for a protective circuit breaker of... Solid-state trip device for a protective circuit breaker of...

H - Electricity

02

H

348/26

H02H 3/00 (2006.01) H02H 3/34 (2006.01)

Patent

CA 2015270

14 ABSTRACT SOLID STATE TRIP DEVICE FOR A PROTECTIVE CIRCUIT BREAKER OF A THREE PHASE MAINS SYSTEM, ENABLING THE TYPE OF FAULT TO BE DETECTED The solid state trip device of a protective circuit breaker of a three phase mains system comprises a fault type detection circuit comparing the currents (Il, I2, I3, IN) flowing in the mains system conductors with a first threshold (S1) and a second threshold (S2), higher than the first one. It supplies a signal (A) representative of a certain type of fault, single phase or two series pole, when a first number of currents are lower than the first threshold (S1) and a second number of currents are higher than the second threshold (S2). Refer to figure 2.

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