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Should I ground one side of my external CT connected to a Tesys T LTMR starter?

Published date: 08 August 2019

Issue:
Customer is using an external CT with a Tesys T LTMR starter and wanted to know if one side should be grounded.

Product line:
LTMR, Tesys T

Environment:
External Ct is being used.

Cause:
Clarification of installation instructions.

Resolution:
Yes, it is recommended to have a shorting block on the external CTs.  Using a shorting/grounding block for all of the CTs (They should all be tied to the same ground) will help with potential EMC noise sources, and in some power systems or equipment can help in the safety aspect.
 

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