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How can earth leakage protection done with NSX MCCB of breaking Capacities HB1 / HB2 ?

- For the MCCB of type NSX with breaking capacities either HB1 or HB2, the only way to provide earth leakage protection is through External Vigirex relay with its closed toriod and MX shunt trip release coil inside the Breaker,

this is because the NSX add on Vigi Module are not used for the Breaking Capacities HB1 and HB2
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