600 VDC switches [RE-wrenches]

[Jay Peltz, Peltz Power]

Hi Brad,

I was just on a job with the 600v units and there is no indication on the
disconnect that you need to jumper the poles for 600vdc.

I have installed in the past a GE brand and they actually have the jumper
diagramed in the instructions and on the door itself.


Curious anyway.?

And I would love to know what "unders some conditions means"!!

Thanks'

Jay

Peltz power


Brad Bassett wrote:

> EH,
>
> I don't know who you talked with at Sq D but I'm pretty certain that
> switch is NOT rated for 600 VDC through one pole! Michael D. contacted
> engineers at both Sq D and GE about 600VDC switches and got the same
> answer from both. One pole might break the 600VDC under some conditions,
> but two poles are necessary for consistant performance with the amperage
> rating of the switch.
>
> The Sq D guy was right that you do not have to wire the OUTSIDE poles,
> just two poles, and they can be adjacent poles, indeed this is how GE
> wires them at the factory. Maybe this confused the guy at Sq D, and when
> he gets back to you about the number of positives, he will have got to
> the root of this and found out that it is only one. This leaves one pole
> of the three unused, but we haven't figured out what to do with it
> except let it sit there.
>
> I think that this list is a good forum for spreading info like this, and
> hope this will keep anyone else from the mistake of mis-wiring these
> switches, and it's attendant hazard.
>
> Brad
>
> EH Roy wrote:
> > Brad,
> >
> > I remember that arcing problem, but don't remember the brand of
> > disconnect
> > it occurred in.
> >
> > Square D technical support tells me I don't have to wire two outside
> > poles
> > in series to get a 600VDC rating on their HU361 - switching of one
> > positive
> > through one pole is appropriate and covered by the UL listing. They are
> > still scratching their heads about how many positives can be switched in
> > one
> > disconnect.
> >
>
> >
> >
> >
>
> Brad Bassett
> Schott Applied Power
> Tumwater, WA office
> bsbassett at earthlink.net
>
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