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Discussion Starter #1
I was looking for recommendations on a HV relay when connecting the B+ wire
to the #1 "spade" on curtis-type controllers.

There is very little amps that flow here.

I call refer to this as the on/off switch.

I plan on using 167volts dc.

I think in the past, I just did a direct connection, but I prefer not to do
that anymore.

Thanks

Michael Golub
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Discussion Starter #2
Lee Hart wrote:

> The traditional solution is a DC-rated relay like the Potter
> & Brumfield KUEP series. They come in SPST versions with a
> 150vdc 10amp contact, or DPST versions with two 150vdc 5a
> contacts (wire in series for 300vdc).
>
> There are also a few relays specified to switch low current
> at high DC voltages. One I've used is the Schrack PT52B012B,
> which is a 4PDT relay with 250vac 6a contacts that are also rated at
>
> 6a at 30vdc
> 1a at 50vdc
> 0.4a at 100vdc
> 0.25a at 300vdc
>
> Since this is a 4-pole relay, you can also wire the poles in
> series for higher voltages or currents.

Another option is to use a reed relay; one almost has to search to find one rated to switch less than 200VDC @ 0.5A. They tend to be smaller and cheaper than the electromechanical alternatives (e.g. the Schrack relay above, PB1161-ND at Digikey, is $5.69ea, while the HE125-ND reed relay, rated to switch 300VDC and 0.5A and carry 1.2A, is $2.21).

Cheers,

Roger.

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Discussion Starter #3
Ok, using the HE125-ND (HE751A1200)

so #2 get 12v+ and #6 gets 12v-

and the switch is 8 and 14 pins?

Lee Hart <[email protected]> wrote:

> On 9/21/2010 11:18 AM, Roger Stockton wrote:
> > Another option is to use a reed relay; one almost has to search to find
> one rated to switch less than 200VDC @ 0.5A. They tend to be smaller and
> cheaper than the electromechanical alternatives (e.g. the Schrack relay
> above, PB1161-ND at Digikey, is $5.69ea, while the HE125-ND reed relay,
> rated to switch 300VDC and 0.5A and carry 1.2A, is $2.21).
>
> That should be a good choice for this application, since KSI draws very
> low current.
>
> --
> Lee A. Hart | Ring the bells that still can ring
> 814 8th Ave N | Forget the perfect offering
> Sartell MN 56377 | There is a crack in everything
> leeahart earthlink.net | That's how the light gets in -- Leonard Cohen
>
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