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Clarification on XFMR secondary OCPD requirements. 

Question asked by tvogan on Mar 13, 2020
Latest reply on Mar 27, 2020 by tvogan

When installing a 1300kva Delta 13.8kv primary, 480vac Delta or Wye secondary.  XFMR will have <6% impermanence.  Is it necessary to install a fused disconnect on the secondary of the XFMR with OCPD on the primary?  Cables will be <25lft. 

I've read 240, 450 and 665 (specific to the equipment being installed) but I cannot determine if secondary OCPD is needed.  Local contractor indicates it is required but when i review other recent installations i find that they do not include secondary protection?

 

help in clarification is greatly appreciated.

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