Re: Varistors - help

["Frank Mc Alinden" <fmcalind@xxxxxxxxxxxxxx>]

Hi Paul

Had a quick look atRS Components and they have all sorts.....there are
several different phyiscal sizes with the same voltage rating..I assume
they
have different energy  absorptions...,I think the 36v ones should bo the
job
ok.........Actually why dont you ask the RS peole which one is suitable for
the rs soleniod your getting ......??

http://tinyurl.com/5haut


Frank




----- Original Message -----
From: "Paul Gale" <groups@xxxxxxx>
To: <ukha_d@xxxxxxx>
Sent: Friday, March 18, 2005 9:04 AM
Subject: RE: [ukha_d] Varistors - help


>
> Great, thanks - Frank to the rescue again ;)
>
> I get the solenoid valve tomorrow. I guess I just need one between the
valve terminals?
>
> Paul.
>
>
>
> > -----Original Message-----
> > From: Frank Mc Alinden [mailto:fmcalind@xxxxxxx]
> > Sent: 17 March 2005 20:40
> > To: ukha_d@xxxxxxx
> > Subject: Re: [ukha_d] Varistors - help
> >
> >
> > Hi Paul
> >
> > > Another thought - are these needed on DC circuits, or is it
just AC?
> >
> >  Both ......I use them for relays etc much better than using
diodes for
> > back
> > emf suppression....will post a little later with hopefully a part
number
> > for
> > you if you cant find anything suitable..
> > Frank
> >
> >
> >
> > ----- Original Message -----
> > From: "Paul Gale" <groups@xxxxxxx>
> > To: <ukha_d@xxxxxxx>
> > Sent: Friday, March 18, 2005 3:23 AM
> > Subject: RE: [ukha_d] Varistors - help
> >
> >
> > >
> > > Another thought - are these needed on DC circuits, or is it
just AC?
> > >
> > > Paul.
> > >
> > >
> > >
> > > > -----Original Message-----
> > > > From: Paul Gale [mailto:groups@xxxxxxx]
> > > > Sent: 17 March 2005 14:36
> > > > To: ukha_d@xxxxxxx
> > > > Subject: [ukha_d] Varistors - help
> > > >
> > > >
> > > > I'm buying a solenoid valve (24V) from RS along with a
float switch
to
> > > > control a water level in a holding tank in the loft -
for water
supply
> > to
> > > > an aquarium downstairs.
> > > >
> > > > I've been recommended to fit a varistor across the
solenoid
terminals
> > and
> > > > float switch terminals.
> > > >
> > > > Can anyone recommend what type of varistor I should use
- and where?
> > > >
> > > > Thanks,
> > > >
> > > > Paul.
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > [Non-text portions of this message have been removed]
> > > >
> > > >
> > > >
> > > >
> > > >
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