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Residual Current Detection webinar - How adapting Vigi on 3-poles Compact NSX when distributed neutral?

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Crewman

Residual Current Detection webinar - How adapting Vigi on 3-poles Compact NSX when distributed neutral?

Hello, 

 

I couldn't understand from webinar what do with molded case breakers, in case of distributed neutral (4 wires) installation.

Should we add a 4 poles Vigi with adaptor on the triple pole Compact NSX?

 

Thanks for giving clarity on this specific case.

 

Best

Espe

2 REPLIES 2
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Re: Residual Current Detection webinar - How adapting Vigi on 3-poles Compact NSX when distributed neutral?

Hello,

 

In 3 Phases + Neutral system the RCD shall measure the current of 3 phases and Neutral. If in this type of system a 3 poles ComPact NSX is used and  RCD funciton is expected, three options are possible : 

 

  1. Replace the 3P ComPact NSX by a 4P ComPact NSX with Micrologic 4.x or 7.x
  2. Use a ComPact NSX 3P + a Vigi Add on 4P with a "Vigi 4P/3P adaptor (Reference : LV429214 for NSX 100-250 frame or LV432457 for NSX400-630 frame)
  3. Use a standalone relay VigicomPact RH* + toroid  with a 3P ComPact NSX without Vigi function.

 

Note : Today there is no equivalent of  "Vigi 4P/3P adpator" for Micrologic Vigi 4.x / 7.x. If you consider this is a concern don't hesistate to provide feedback.

 

Regards

Highlighted
Crewman

Re: Residual Current Detection webinar - How adapting Vigi on 3-poles Compact NSX when distributed neutral?

Thanks Mathieu, 

 

At this point I can implement at least one option among 3 ones in different cases I met up to now.

 

Best

Espe