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I have an NSX160 3P TMD160 with a Toroid and Vigirex RH99 I am connecting the neutral w el earth on the same single point, The Vigirex always trips the breaker after 3 min max. Does the vigirex sense the current because of the neutral so it trips the breaker? Can you advise me with the solution for this problem

The Vigirex relays are not compatible with the TN-C earthing system (combined neutral and earth) as clearly mentioned in the Vigirex Catalogue. The Neutral and Earth conductors have to be separate in order the Vigirex relay works properly. 
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