Circuit interrupter using arc commutation

Details Circuit interrupter using arc commutation Circuit interrupter using arc commutation

H - Electricity

01

H

348/1

H01H 9/42 (2006.01) H01C 7/10 (2006.01) H03K 17/56 (2006.01)

Patent

CA 1263468

CIRCUIT INTERRUPTER USING ARC COMMUTATION Abstract of the Disclosure A solid state circuit interrupter connected in parallel across a pair of separable contacts diverts the circuit current away from the contacts upon separation to extinguish the arc formed between the contacts. A zener diode within the solid state switch turns on a triac when the contact arc voltage reaches a predetermined magnitude for transferring the current to a capacitor. When the capacitor voltage reaches the clamping voltage of a metal oxide varistor connected in parallel with the capacitor, the current then transfers to the metal oxide varistor and rapidly approaches zero.

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