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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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    There is a note in the BEAMA RCD guide


    TABLE 4 – STANDARD VALUES OF BREAK TIME AND NON ACTUATING TIME

    For RCCBs and RCBOs of the general type with I∆n≤ 0,030 A, and RCBOs of the general type incorporated in or intended only for association with plugs and socket-outlets, 0.25 A may be used as an alternative to 5I∆n


    Does that mean Hager are wrong supplying these RCDs for anything other than plug and docket circuits?


    Andy
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  • 0
    There is a note in the BEAMA RCD guide


    TABLE 4 – STANDARD VALUES OF BREAK TIME AND NON ACTUATING TIME

    For RCCBs and RCBOs of the general type with I∆n≤ 0,030 A, and RCBOs of the general type incorporated in or intended only for association with plugs and socket-outlets, 0.25 A may be used as an alternative to 5I∆n


    Does that mean Hager are wrong supplying these RCDs for anything other than plug and docket circuits?


    Andy
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