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RCD Testing x5 150mA (or higher for Hager RCCB)

sparkiemike
Following on from John Peckham's recent post, I have recently installed several of Hager's consumer units with their new 100A 30mA Type A RCD (CD285U)


When testing the RCDs I noticed the trip times were much higher than previously experienced. Hager have said that RCCB needs to be tested at 250mA https://www.hager.co.uk/news-exhibitions-case-studies/18th-edition/updated-guidance-rccb-testing/97806.htm


In addition, if you have a Fluke you may notice that when carrying out a earth loop test (in no trip mode) the Fluke will fail to get a reading and trip the RCD. Apparently Hager have had a several reports of this and when I called could not explain it.
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    I have just come across a Youtube video about this very subject. I wonder what the trip times will be after the R.C.D. has stood unused or untested for a year or two and has become a bit sticky in operation?


    You may need a language interpreter for this video that has wooley sound and unclear speech in places.

    https://www.youtube.com/watch?v=c0dPUf_aZ4E


    643.8 "The verification of the effectiveness of the measures for additional protection is fulfilled by visual inspection and testing. Where R.C.D.s are required for additional protection, the effectiveness of automatic disconnection of supply by R.C.D.s shall be verified using suitable test equipment according to BS EN 61557-6 (see Reg. 643.1) to confirm that the relevant requirements of Chapter 41 are met."


    "NOTE. Effectiveness is deemed to have been verified where an R.C.D. meeting the requirements of 415.1.1 disconnects within 40ms when tested at a current equal to or higher than five times its rated residual current."


    "Or higher than" eh?





    Z.




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  • 0
    I have just come across a Youtube video about this very subject. I wonder what the trip times will be after the R.C.D. has stood unused or untested for a year or two and has become a bit sticky in operation?


    You may need a language interpreter for this video that has wooley sound and unclear speech in places.

    https://www.youtube.com/watch?v=c0dPUf_aZ4E


    643.8 "The verification of the effectiveness of the measures for additional protection is fulfilled by visual inspection and testing. Where R.C.D.s are required for additional protection, the effectiveness of automatic disconnection of supply by R.C.D.s shall be verified using suitable test equipment according to BS EN 61557-6 (see Reg. 643.1) to confirm that the relevant requirements of Chapter 41 are met."


    "NOTE. Effectiveness is deemed to have been verified where an R.C.D. meeting the requirements of 415.1.1 disconnects within 40ms when tested at a current equal to or higher than five times its rated residual current."


    "Or higher than" eh?





    Z.




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