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What is the function of the insulation monitoring module that is installed with NSX MCCB ?

This module detects and indicates an insulation drop on a load circuit (TN-S or TT systems).

Operation is identical to that of a Vigi module, but without circuit-breaker tripping.

Indication by a red LED in front.

An auxiliary contact may be installed for remote insulation-drop indications.

When insulation drops below a minimum, user-set threshold, the LED goes on and

the auxiliary contact switches. The fault indication cannot be cancelled except by

pressing the manual reset button.


**The module is installed directly on the downstream circuit-breaker terminals.

** Degree of protection IP40, IK04.

** Double insulation of the front face.

Electrical characteristics

** Settings: 100 - 200 - 500 - 1000 mA.

** Accuracy: -50 +0 %.

** Time delay following insulation drop: 5 to 10 seconds.

** AC-system voltage: 200 to 440 V AC.

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