Re: [CAD_CAM_EDM_DRO] Re: ELCB Issues

On Sun, 18 Mar 2007 21:24:57 -0000, you wrote:

>Trouble is we have no other choice but to use an EMC filter.
>
>I have used a lot of Jaguar, Omron and Siemens inverters with and without
>EMC filters, and for me they still tripped a 100mA ELCB with or without the
>filter.
>
>These were all new. We used to just have a spare supply on it's own ELCB
>just for testing the inverters so it wouldn't knock all the rest of the
>factory out.

I've two IMO Jaguar inverters that don't trip a 100mA ELCB here under
"normal" circumstances. I can force a trip by powering everything in the
shop up, lathe, mill, grinder, heater, mig and tig welders. Which ever
one is that is turned on last out of the list, will trip it. Both IMO's
have filters on the input.

Under normal circumstances, I never have the mill and lathe running at
the same time, and never get a trip. I often weld and run a CNC machine.

Just to add to the confusion, I've also got a crap Earth and often get
100V+ Neutral to Earth.


Steve Blackmore
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