No Voltage Release switch "NVR"

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Speedskater

Posted: Tue Feb 13, 2007 1:21 pm

Guest

Is there any US equivalent to a "No Voltage Release" switch?

Kevin
remove the zeppelin to rely.

Prepair Ltd

Posted: Tue Feb 13, 2007 2:32 pm

Guest

On Tue, 13 Feb 2007 12:21:23 -0500, Speedskater <grafkcBLIMP@cox.net> wrote:

Quote:

Is there any US equivalent to a "No Voltage Release" switch?

Kevin

You can make up something similar with a contactor with holding contacts and a
single-push reset switch. Contactor is started by closing the single-push reset
switch, holding contacts hold it on (!) if the supply fails it will not close on
supply restoration unless the reset switch is pushed.

A lot of motor starters have this feature as standard.

Peter
--
Peter A Forbes
Prepair Ltd, Luton, UK
prepair@easynet.co.uk
http://www.prepair.co.uk

Speedskater

Posted: Tue Feb 13, 2007 2:42 pm

Guest

Prepair Ltd wrote:

Quote:

On Tue, 13 Feb 2007 12:21:23 -0500, Speedskater <grafkcBLIMP@cox.net> wrote:

Is there any US equivalent to a "No Voltage Release" switch?

Kevin

You can make up something similar with a contactor with holding contacts and a
single-push reset switch. Contactor is started by closing the single-push reset
switch, holding contacts hold it on (!) if the supply fails it will not close on
supply restoration unless the reset switch is pushed.

A lot of motor starters have this feature as standard.

Peter
--
Peter A Forbes
Prepair Ltd, Luton, UK
prepair@easynet.co.uk
http://www.prepair.co.uk

I know.
That's what we first thought of in another group.
Then someone in the UK suggested using a NVR switch.
See:
http://orion.quicksytes.com/viewtopic.php?t=436&postdays=0&postorder=asc&start=15

Thanks
Kevin

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