What is the minimum overload setting on the TM-D thermal magnetic trip units for NS & NSX breakers?
Only the three and four pole devices can be adjusted, single and double devices are fixed.
The NS100 - 250 TM-D thermal / magnetic trip units (including Merlin Gerin NS breakers) have an adjustment range of between 0.8 - 1 times the rating (In) of the trip unit.
The NSX100 - 250 TM-D thermal / magnetic trip units have an adjustment range of between 0.7 and 1 times the rating (In) of the trip unit.
For breakers with a current rating above 250 A, we use electronic trip units (Micrologic).
Released for: Schneider Electric UK
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