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300 mA RCD

AMK

Hi I have a problem with a 3 phase industrial ironer. main components are (3) inverters roughly 8 amps per phase (24 amps) no further details at this time.the circuit is protected with a C50 Amp MCB feeding a 300mA type B RCD. The RCD has tripped, and now will not reset even with the load disconnected and therefore requires replacement. The ironer is new. what are your thoughts?

  • AMK said:
    what are your thoughts?

    Really? I thought at first that "correct" as you type had mangled things, but seemingly no. You will hate me for this, but I have Mrs P so I do not need an industrial ironer.

    More seriously, the RCD is faulty. IIRC, we have discussed a 7% failure rate in here previously. I see no particular reason to suspect the new press, but of course if the RCD is replaced and the problem is not resolved, you will have to think again.

    Why 300 (hundred) mA please. (I assume not a typo for 30 (tens) mA.)

  • in reply to Chris Pearson

    No typo, 300mA. Which regulation requires 300mA protection? Quick fire round Chris 

  • in reply to AMK

    422.3.9

  • in reply to AMK

    Got me there!

  • in reply to AMK

    My apologies. I find that all too often I type something, or at least I think that I have typed something, and it ends up different.

  • in reply to Chris Pearson

    Not the response I was expecting, I feel like I have overacted. My apologies 

  • Former Community Member
    Former Community Member

    Have you tried testing the RCD on ramp and without the device connected

  • in reply to Former Community Member

    I couldn’t even get it to reset. I disconnected the load cables and it stills Tripped.

  • in reply to AMK

    It’s been sent back to China for tests. Despite what you all might be thinking, this is a reputable brand.

  • Former Community Member
    Former Community Member in reply to AMK

    If you cannot test it when disconnected i’d guess it’s beyond use.

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