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Home » Spaces » Smart-UPS & Symmetra LX / RM » discussion » General » symmetra lx site wiring fault

symmetra lx site wiring fault

Discussion in Smart-UPS & Symmetra LX / RM started by Charlie , 5/28/2009 1:48 PM
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  • ctferndo
    Charlie
    New Member New Member
    Charlie 5/28/2009 1:48 PM

    I still get a site wiring fault even if L1 to N and L2 to N is less han 8%. In fact the difference is less than 1 volt. Please help.

  • Erasmus
    Don
    =S= Representative
    Don 5/28/2009 5:08 PM (in response to Charlie)

    A site wiring fault can also be present if the UPS detects no neutral on the input. Additionally, if the input phases are derived from a separate panel/transformer than the neutral that is wired to the unit, this can cause intermittent site wiring faults as well.

    Have you checked your system wiring configuration? Both phases, neutral and ground should be wired per this kbase: Answer ID 7059, which can be accessed via the following link:

    http://nam-en.apc.com/cgi-bin/nam_en.cfg/php/enduser/std_adp.php?p_faqid=7059

    Your best bet at this point would be to totally de-energize the UPS and firmly reseat the wiring tray in the back of the unit and verify all wiring back to the panel and on the input to the unit.

    Has this UPS worked fine in the past or is this a new installation?

  • ctferndo
    Charlie
    New Member New Member
    Charlie 5/28/2009 9:08 PM (in response to Don)

    This is a new installation in the Philippines. But the unit is a US / Japan Symmetra LX 16KVA. We have a 230 volt single phase and I extracted neutral from earth ground which provided 115 v L1 to N and 115 V L2 to N.

  • Erasmus
    Don
    =S= Representative
      This discussion is marked as answered
    Don 5/28/2009 10:58 PM (in response to Charlie)

    The US unit is L1,L2,N,G only per the electrical installation guide, with no exceptions. The Philippines would use the 230v "I" model Symmetra LX which is designed to be used for H, N, G wiring.

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