Recent content by DavidO05

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    Megger 1552 (Hi current test not tripping 30ma rcd)

    I asked a guy that works with me to get his tester out aswell, which was only a week old. His tester was working accurately. We done a loop test using the megger and his di-log on either side of the rcd. The megger recorded .50ohm difference, where as his tester recorded no difference at all.
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    Megger 1552 (Hi current test not tripping 30ma rcd)

    It’s on both tn-s and tn-c-s. I’m yet to use it on a tt system. I have spoken to megger technical. They said to use the hi current reading and just to do a ramp test to ensure the rcds are tripping at an acceptable Ma. Just seems bizarre it’s with both my 1552 testers
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    Megger 1552 (Hi current test not tripping 30ma rcd)

    The test leads on one of the instruments is brand new. Everything else about the meter is still giving decent readings
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    Megger 1552 (Hi current test not tripping 30ma rcd)

    the Rcds are MK mainly but it’s recently happend on a CPN rcd aswell. It seems to be more on the recent metal clad dbs, I don’t know whether they have altered the rcds in anyway
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    Megger 1552 (Hi current test not tripping 30ma rcd)

    Hi guys, I own 2 megger mft 1552 testers. I recently found that loop readings on both testers give me high Zs readings on final circuits protected by 30ma rcds on low current. If I select the hi current setting I get a reading I expect to achieve, but the hi current test never trips the rcd...

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