RCD tripping when inverter running

[mtt.tr]

while running yes but not on an insulation test

I haven't read the full thread.

My bad.

 

[dobbslc]

here https://www.test-meter.co.uk/blog/18th-edition-new-requirements-for-nuisance-rcd-tripping/ . I have a clap meter that measures milliamps and use it if I cant determine earth leakage with the megger

@brightspark I want one of these "clap" meters, where do they come from? Are they anything to do with the NHS clapping on Thursdays?
Or is it for STD's?

On a serious note, we have a fair bit of trouble on site with the lift engineers inverter controlled motors tripping out site supplies and we have 100ma (minimum) time delayed RCD's.
It might be worth splitting the workshop onto a separate feed on it's own RCD to reduce the earth leakage through your house one.
Try turning everything in the house off and pulling the fuses then try the inverter in the workshop, if it works ok then I'd say it's just a build up of fault current.

 

[Onoff]

I have a clap meter

Roll on Thursday night then!

 

[Beavertooth]

Have you tried this with all the MCB's turned off Except the circuit you are running the inverter on.

MCB: That's the Main Circuit Breaker, right?? If that was turned off does that not isolate everything???

 

[Beavertooth]

@brightspark I want one of these "clap" meters, where do they come from? Are they anything to do with the NHS clapping on Thursdays?
Or is it for STD's?

On a serious note, we have a fair bit of trouble on site with the lift engineers inverter controlled motors tripping out site supplies and we have 100ma (minimum) time delayed RCD's.
It might be worth splitting the workshop onto a separate feed on it's own RCD to reduce the earth leakage through your house one.
Try turning everything in the house off and pulling the fuses then try the inverter in the workshop, if it works ok then I'd say it's just a build up of fault current.

Will try that and see.

 

[Onoff]

MCB: That's the Main Circuit Breaker, right?? If that was turned off does that not isolate everything???

No mcb is miniature circuit breaker. What took the place of fuses. One for each circuit.

 

[RichardM]

Just in case you haven't checked your connections.
My welder has recently started to trip the RCD, I found the mains in connectors were (1/4 lucar onto a circuit board) arcing as the connectors were getting old. Both replaced along with the spades and all is well again.

 

[brightspark]

MCB: That's the Main Circuit Breaker, right?? If that was turned off does that not isolate everything???

what he is saying knock all the mcb off on the other circuits and just leave the one feeding your inverter and mainswitch on it may partly eliminate other build up of leakage connected and running

 

[Beavertooth]

what he is saying knock all the mcb off on the other circuits and just leave the one feeding your inverter and mainswitch on it may partly eliminate other build up of leakage connected and running

Will try this. Thank you guys for all the feedback here, it's been really helpful.. I appreciate it a lot. Keep save these time.