Re: Relays for Switching Sense Leads on Power Supplies
- From: Spehro Pefhany <speffSNIP@xxxxxxxxxxxxxxxxxxxxxxx>
- Date: Thu, 01 Feb 2007 12:37:55 -0500
On 1 Feb 2007 08:51:05 -0800, the renowned "EdV"
<ed_vogel@xxxxxxxxxxx> wrote:
I have been asked to select relays that will be used to switch power
supply sense leads between remote and local sense. My impression is
that mercury wetted contacts will be the best bet for currents likely
to be less than 1ma. I say likely because the folks at the unnamed
power supply companies do not spec it and are researching the answer
for me.
Anyone care to share their experience in this or a similar
application.
Thanks much,
Ed V.
Mercury-wetted reeds should do the trick, but there are other kinds of
relays rated for dry circuit use that don't use mercury (eg. inert-gas
filled with precious metal contacts, regular reeds etc.).
Best regards,
Spehro Pefhany
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