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emergency lighting

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  • 05-03-2013 7:44pm
    #1
    maxamillius
    Registered Users Posts: 1,136 ✭✭✭


    hi,working as an electrician in busy office block,recently we had all running men replaced with led version,majority of the units are starting to fail now!

    on inspection ive noticed the pcb on the inverter is completely fried in any of them that i have looked at!

    they have been sent back to the manufacturer who have refurbed them and tested them and sent them back working!
    they are now saying that its a problem on our side,,,
    im just wondering what peoples thoughts would be on this?
    over voltages etc???

    the units are self test but are still wored thoriugh a c.t.u,im beginning to think that a flick of the c.t.u which was done a few months back would obviously give a surge and may be causing them to burn out???
    all ideas welcome,cheers lads!


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    #2
    2011
    Moderators, Home & Garden Moderators, Technology & Internet Moderators, Regional East Moderators Posts: 12,593 Mod ✭✭✭✭2011


    maxamillius wrote: »
    they have been sent back to the manufacturer who have refurbed them and tested them and sent them back working!
    they are now saying that its a problem on our side,

    If they are insisting that the problem is on your side they should state what the problem is. Just saying it is your fault is not good enough.
    over voltages etc???
    Possibly.
    the units are self test but are still wored thoriugh a c.t.u,im beginning to think that a flick of the c.t.u which was done a few months back would obviously give a surge and may be causing them to burn out???

    It should not.
    The central test unit simply disconnects the supply to the unit.
    It is just a contactor operated by a timer.

    If these lights have some special requirement this should have been stated by the manufacture. Check the data sheet and see.


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    #3
    maxamillius
    Registered Users Posts: 1,136 ✭✭✭maxamillius


    ye didnt think the c.t.u would be causing an issue,just throwing all ideas out there!going back to maybe slight over voltage or spike in voltage which is causing the inverters to fail!

    whats the best way of measuring for over voltage on circuit?


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    #4
    2011
    Moderators, Home & Garden Moderators, Technology & Internet Moderators, Regional East Moderators Posts: 12,593 Mod ✭✭✭✭2011


    maxamillius wrote: »
    ye didnt think the c.t.u would be causing an issue,just throwing all ideas out there!going back to maybe slight over voltage or spike in voltage which is causing the inverters to fail!
    In my opinion an emergency light should be designed to work in conjunction with a CTU. This is standard practice.

    Have the lights been provided with some sort of certification?
    Do you have a data sheet for them?
    whats the best way of measuring for over voltage on circuit?
    There is a device that the ESB use to graph the voltage over a period of time (over a few days). I don't know where you could get something like this.


    Why not change out one light for a similar of a different make and see how it performs?


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