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High PFC issues

Former Community Member
Former Community Member

Hi all,

First post coming in…

I have a installation that we have been asked to Test, I conducted the usual tests for the Ze & Pfc.  I got 0.4 ohms & 11.7kA respectively.  Its a commercial block and the transformer is behind a locked door about 20m away, so probably reasonable to assume it’s accurate.  So here is my question given the absence of 15kA RCBO’s and the rarity 15kA MCB’s, what are my options?

Thanks in advance.

Parents
  • Former Community Member
    0 Former Community Member

    Thank you all for your help and advise. I think I have the answer I was looking for.

     

    more info for those that want it.

    • TNCS v TNS as far as I can ascertain it is a TNS, based upon the nature of the installation and what I have seen to date that is, however I can’t be certain as the header is a sealed unit and obviously I can’t break it to investigate.  The local authority aren’t much help in confirming that either.
    • There is no Switch Panel, just the Standard DB with standard MCB’s / RCBO’s and a factory for MCCB as the main switch
    • The DB is a Merlin Gerin Isobar 4c, there is a mix of Schneider & Merlin MCB’s fitted which is acceptable as they are effectively the same brand and susiquently tested to the same standards.
Reply
  • Former Community Member
    0 Former Community Member

    Thank you all for your help and advise. I think I have the answer I was looking for.

     

    more info for those that want it.

    • TNCS v TNS as far as I can ascertain it is a TNS, based upon the nature of the installation and what I have seen to date that is, however I can’t be certain as the header is a sealed unit and obviously I can’t break it to investigate.  The local authority aren’t much help in confirming that either.
    • There is no Switch Panel, just the Standard DB with standard MCB’s / RCBO’s and a factory for MCCB as the main switch
    • The DB is a Merlin Gerin Isobar 4c, there is a mix of Schneider & Merlin MCB’s fitted which is acceptable as they are effectively the same brand and susiquently tested to the same standards.
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