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What are the opening conditions for the MN release coil inside NSX MCCB ?

Circuit-breaker tripping by an MN release meets the requirements of standard IEC 60947-2.

Automatic opening of the circuit breaker is ensured when the continuous voltage supply to the release U y 0.35 x Un.

 If the supply voltage is between 0.35 and 0.7 Un, opening is possible, but not

guaranteed. Above 0.7 Un, opening does not take place.

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