Сбой в работе MCCB

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  MCCB circuit breaker CSDM7L-250L-4300 4P CSDM7L Series RCCB earth leakage protection type 400V 250A 3 poles 4 Poles
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  MCCB circuit breaker CSDM7L-400A-4300 4P CSDM7L Series RCCB earth leakage protection type 400V 400A 4 Poles
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  MCCB circuit breaker CSDM7L-630A-4300 4P CSDM7L Series RCCB earth leakage protection type 400V 630A 4 Poles