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307 posts

Ultimate Geek


#311265 31-Dec-2023 14:59
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I found this via Google:


I have a simlar issue. 30mA RCCD, got a flash new Cyberpower UPS... no issue for a while, as we didn't have powercuts, but now if the power goes out (me on the main board or an actual one), it flips the RCCD, even if there is no load behind it.


Other than taking it back to PBT and either getting a replacement, or a different brand... any ideas? I dont think I can get the RCCD removed, nor I think would I want to (this is in an external studio, and there is another one in the house on the mainboard....)


@robfish maybe?

Nic Wise -

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  #3176535 31-Dec-2023 16:30
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I have occasionally heard of this happening from various power electronics. If it's intermittent, it's not really easy to troubleshoot or diagnose with any certainty.


Replacing the RCD/RCCB with another brand but the same specification can be an option. Does it trip an RCD when connected in the main house, or only the RCD in the studio?


Replacing the UPS, either with another model or possibly just another unit of the same model, is probably easiest. 




You can usually order a transfer to battery from the command line tools, *without* disconnecting the mains. Does this trip the RCD?



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