RE: [CAD_CAM_EDM_DRO] Re: ELCB Issues

Thanks for the update Ian.

These inverters seem to be a little funny when it comes to ELCB's. I have
never managed to keep a normal household ELCB in even with a really small
inverter, and we've used many different makes in all sorts of equipment,
with and without filters, and on several different factory and domestic
sites.

Yet others replied to the posts to say they don't have any problems.

It's got to be down I think to the differences in ground impedances I think.



Anyhow glad to hear your up an running. Just keep the fingers out and make
sure your cables are well protected, since without the ELCB you have less
protection.



Regs Mark



Dr. Mark Vaughan Ph'D. B.Eng. M0VAU

Managing Director

Vaughan Industries Ltd, reg in UK no 2561068

Water Care Technology Ltd, reg in UK no 4129351

Addr Unit3, Sydney House, Blackwater, Truro, Cornwall, TR4 8HH, UK.
Phone/Fax 44 1872 561288

RSGB DRM111(Cornwall)

_____

From: CAD_CAM_EDM_DRO@yahoogroups.com
[mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of xj5373
Sent: 19 April 2007 19:39
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: [CAD_CAM_EDM_DRO] Re: ELCB Issues



After all your good advice I wanted to update you on my ELCB problem.
I rewired the workshop ring main and fed it from the non ELCB side of
the consumer unit and the problem went away.

Out of interest the workshop has three inverters in it already none
of which ever gave any problems with the ELCB. One of these is built
into my Myford 254 so I couldn't say just what it was but the other
two are an Alston ALSPA MV500 and a Mitsubishi E500. The inverter in
the Denford is by Siemens.

Ian

--- In CAD_CAM_EDM_ <mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>
DRO@yahoogroups.com, "Mark Vaughan" <mark@...>
wrote:

>
> Hi Lester
>
> What make inverter did you find that is good to use after an ELCB.
>
> I've fitted loads of VFD's or all sorts of makes and never found

one yet

> that will keep a 100mA ELCB in.
>
>
>
> Dr. Mark Vaughan Ph'D. B.Eng. M0VAU
>
> Managing Director
>
> Vaughan Industries Ltd, reg in UK no 2561068
>
> Water Care Technology Ltd, reg in UK no 4129351
>
> Addr Unit3, Sydney House, Blackwater, Truro, Cornwall, TR4 8HH, UK.
> Phone/Fax 44 1872 561288
>
> _____
>
> From: CAD_CAM_EDM_ <mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>

DRO@yahoogroups.com

> [mailto:CAD_CAM_EDM_ <mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>

DRO@yahoogroups.com] On Behalf Of Lester Caine

> Sent: 18 March 2007 20:49
> To: CAD_CAM_EDM_ <mailto:CAD_CAM_EDM_DRO%40yahoogroups.com>

DRO@yahoogroups.com

> Subject: Re: [CAD_CAM_EDM_DRO] Re: ELCB Issues
>
>
>
> xj5373 wrote:
> > Thanks for this.
> >
> > I guess the thing that bothers me is that once the machine is up

and

> > running, like this morning for example, everything works normally

and

> > the trip stays in. So it seems that in normal circumstances there

is

> > no imbalance between live and neutral, it seems to be something

that

> > happens just when the charge pump relay powers up the inverter

and

> > the stepper power supply, hence my suggestion of some kind of
> > transient.
> >
> > Once powered up the Inverter (spindle) can be switched on and off
> > with no ill effects, the steppers similarly work without problems.
>
> Filter caps connected to earth causing a problem? Hence the point

about

> checking WHAT is connected to the earth line. I have an nice EMC

test set

> that
> does cause a problem with it's caps, so it has a large isolating

transformer

>
> in front. The inverter I've been playing with does not give any

trouble and

> has been designed to be used after an ELCB, so that may be the

problem.

>
> --
> Lester Caine - G8HFL
> -----------------------------
> Contact - http://home. <http://home.

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> lsces.co.uk
> MEDW - http://home.

<http://home. <http://home.lsces.co.uk/ModelEngineersDigitalWorkshop/>
lsces.co.uk/ModelEngineersDigitalWorkshop/>

> lsces.co.uk/ModelEngineersDigitalWorkshop/
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sql.org/index.php> sql.org/index.php

>
>
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>

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