RCBO X5 trip time out, caused by washing machine

[Engineer54]

This is my argument for why RCD should be tested with loads connected if is not going to operate when it's in use what's the point ?

It's great that it works with no load but then when in use fails to operate but this is a time old debate not for an overnight fix

That's fine when you're in fault finding mode but NOT when your conducting official RCD cert tests.
You are then testing the RCD compliance, not what's connected to the circuit, that the RCD is protecting.... Hopefully if you're conducting electrical tests in the correct sequence, thatall the other tests, would have already proved that circuit sound and in compliance...

 

[Midwest]

That's fine when you're in fault finding mode but NOT when your conducting official RCD cert tests.
You are then testing the RCD compliance, not what's connected to the circuit, that the RCD is protecting.... Hopefully if you're conducting electrical tests in the correct sequence, that
all the other tests, would have already proved that circuit sound and in compliance...

Yeah your right, this case I was just calibrating my mft and this fault would of come up on IR test.

 

[grandfortune]

I had this loads of times, its nothing to worry about, you should not have loads on the RCD'd circuit when testing, the WM is not making the RCBO faulty just the way the tester is putting the fault on and the WM is interfering with that, someone explained it to me but it went right over my head, its to do with the test equipment thats all.

 

[SPARTYKUS]

Install a dedicated test socket next to your CU marked "testing only" & leave switched off when not using. I did.

 

[Midwest]

Thanks, Grandfortune

 

[Midwest]

Install a dedicated test socket next to your CU marked "testing only" & leave switched off when not using. I did.

On it's own circuit? Not a bad idea, but I suppose it could still be affected by other neutral/earth faults on other circuits?

 

[SPARTYKUS]

No, don't think it should. The socket would be non RCD protected (ooo er!) - i use a plug in RCD for checking RCD function.