First you need to define the type of current transformer, of which we offer three types.

- Solid CT
- Bolt on CT
- Split Core CT

For more information on solid CT , then check the attached Acti9 catalogue in which you can find in section 7 Control and command page 98 to page 108.




For more information on bolt on CT which fit directly onto the NSX MCCB, see link below to the Low Voltage Power Distribution catalogue and refer to page 178.

https://www.se.com/uk/en/download/document/SE12313/

The factors to take into account here are the amount of available space in the MCCB panel, current to be measured and how many poles are required to be monitored.

For the Split Core CTs see attached the Veris split core CT sheet showing various sizes referring to current ratio.

Released for: Schneider Electric UK