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circuit breaker 66 kv gis switchgear tools electronic weighing device

Rating of Circuit Breaker | Short Circuit Breaking Making ...· For below 400 KV systems, the circuit breaker is designed to withstand 10% above the normal system voltage. For above or equal 400 KV system the insulation of circuit breaker should be capable of withstanding 5% above the normal system voltage. That means, rated voltage of circuit breaker corresponds to the highest system voltage.

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