To define the part number of the vigi unit, you need to identify the frame size (current rating) and number of poles of the NSX breaker to be attached to the vigi module.
Use the attached PDF file and selection chart to help you determine the correct Vigi Unit for the intended application.
i) For Type and Sensitivity see the NSX catalogue 2022, pages B22-B25
ii) For Product part number see selection chart below.

A four pole vigi unit can be installed on a three pole MCCB  if the following part number LV429214 is used. There are also other factors to take into account if the distribution board has a neutral then you would need to also fit a neutral linking kit to the vigi unit part number NSNL250 for up to 250A and part number NSNL630 for up to 630A.

Released for: Schneider Electric Ireland