Solid-state trip device comprising a zero sequence current...

Details Solid-state trip device comprising a zero sequence current... Solid-state trip device comprising a zero sequence current...

H - Electricity

02

H

348/25

H02H 3/10 (2006.01)

Patent

CA 1301904

ABSTRACT SOLID-STATE TRIP DEVICE COMPRISING A ZERO SEQUENCE CURRENT DETECTION CIRCUIT A signal representative of the zero sequence current is obtained from current transformers (16) associated with each phase and with the neutral if applicable by separate summing, in two distinct conductors (J, K), of the positive half-wave currents and of the absolute value of the negative half-wave currents produced by the set of current transformers , the difference between the currents flowing through these two conductors being representative of the zero sequence current.

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