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How can I add earth-leakage protection to NSX breakers ?

There are two ways to add earth-leakage protection to any three or four-pole Compact NSX100 to 630 circuit breaker equipped with a magnetic, thermal-magnetic or Micrologic 2, 5 or 6 trip unit:
1- by adding a Vigi module to the circuit breaker to form a Vigicompact NSX
 2-by using a Vigirex relay and separate toroids.
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