COMMUTATION CIRCUIT FOR AN HVDC CIRCUIT BREAKER

摘要

RD-9085COMMUTATION CIRCUIT FOR AN HVDCCIRCUIT BREAKERABSTRACT OF THE DISCLOSUREA commutation circuit for a high voltage DC circuitbreaker incorporates a resistor capacitor combination and acharging circuit connected to the main breaker, such that acommutating capacitor is discharged in opposition to theload current to force the current in an arc after breakeropening to zero to facilitate arc interruption. In aparticular embodiment, a normally open commutating circuitis connected across the contacts of a main DC circuitbreaker to absorb the inductive system energy trapped bybreaker opening and to limit recovery voltages to a leveltolerable by the commutating circuit components.