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Is it possible to upgrade the trip unit for NSX breakers?

Kindly be informed that it is possible upgrade the NSX trip unit ,except for the Compact NSX with R, HB1 and HB2 breaking performances ,the trip units are not upgradable.

We would like to mention that onsite swapping of trip units is simple and reliable ,as follows:
 No connections to make
 No special tools (e.g. calibrated torque wrench)
 Compatibility of trip units ensured by mechanical cap
 Torque limited screw ensures proper mounting
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