Help with higher voltage switch or relay

R

Rolavine

Guest
I've got an industrial control design problem.

I have to switch a signal through a relay or switch that not only meets these
criteria, but is fairly cheap too, and it needs to be SPDT.

Signal is 120vac at 10 amps to 220Vac at 5 amps, but must be rated to a
dielectric strength of 5KV because a brief set of ignition pulses for HID lamp
must travel through it. In operation the switch will never have to switch the
high voltage pulse, but must be able to pass it. I've been looking for ratings
of the dielectric strength. This design has to go through UL so I need a part
that has a rating for these applications.

The only thing I've been able to come up with is using a connector with a good
enough rating, and two jumper caps to select the signal. While I could do this
it is an ugly approach. Come to think of it maybe I can sell this idea because
it makes it hard to change the settings, hummm. If your given lemons make
features?

Any ideas, thanks.

Rocky
 
Hi Rocky,

Potter&Brumfield used to be the company to ask about this stuff. Check
out this link:

http://www.pandbrelays.com/

If all fails post again. There are ways to control a relay (or anything
else) via a barrier but it'll be a challenge from a cost point of view.
Actually it would help to know a $$ number here.

Regards, Joerg

http://www.analogconsultants.com
 
In article <20050116160606.02159.00000034@mb-m14.aol.com>,
Rolavine <rolavine@aol.com> wrote:

Signal is 120vac at 10 amps to 220Vac at 5 amps, but must be
rated to a dielectric strength of 5KV because a brief set of
ignition pulses for HID lamp must travel through it. In operation
the switch will never have to switch the high voltage pulse, but
must be able to pass it. I've been looking for ratings of the
dielectric strength. This design has to go through UL so I need a
part that has a rating for these applications.
Click to expand...
Voltage Selector Switches (for 120/240V mains selection)
might have suitable isolation specs.

--
Tony Williams.
 
Subject: Re: Help with higher voltage switch or relay
From: Tony Williams @ledelec.demon.co.uk

In article <20050116160606.02159.00000034@mb-m14.aol.com>,
Rolavine <rolavine@aol.com> wrote:

Signal is 120vac at 10 amps to 220Vac at 5 amps, but must be
rated to a dielectric strength of 5KV because a brief set of
ignition pulses for HID lamp must travel through it. In operation
the switch will never have to switch the high voltage pulse, but
must be able to pass it. I've been looking for ratings of the
dielectric strength. This design has to go through UL so I need a
part that has a rating for these applications.

Voltage Selector Switches (for 120/240V mains selection)
might have suitable isolation specs.

I tried that too. However they wouldn't fit anyway if you mean the standard
Click to expand...
wall switch. I couldn't find any rating of dielectric strength for these
switches anyway. I'm begining to think using a connector is my best hope for
getting this design past UL.

Thanks anyway.

Rocky
 
On Tue, 18 Jan 2005 00:55:42 +0000, Rolavine wrote:

Subject: Re: Help with higher voltage switch or relay
From: Tony Williams @ledelec.demon.co.uk

In article <20050116160606.02159.00000034@mb-m14.aol.com>,
Rolavine <rolavine@aol.com> wrote:

Signal is 120vac at 10 amps to 220Vac at 5 amps, but must be
rated to a dielectric strength of 5KV because a brief set of
ignition pulses for HID lamp must travel through it. In operation
the switch will never have to switch the high voltage pulse, but
must be able to pass it. I've been looking for ratings of the
dielectric strength. This design has to go through UL so I need a
part that has a rating for these applications.

Voltage Selector Switches (for 120/240V mains selection)
might have suitable isolation specs.

I tried that too. However they wouldn't fit anyway if you mean the standard
wall switch. I couldn't find any rating of dielectric strength for these
switches anyway. I'm begining to think using a connector is my best hope for
getting this design past UL.

Be sure and provide a "dummy" connector to stow the one that's not
Click to expand...
connected. :)

Cheers!
Rich
 
Subject: Re: Help with higher voltage switch or relay
From: Boris Mohar borism_-void-_@sympatico.ca
Date: 1/16/05 1:27 PM Pacific Standard Time
Message-id: <rvmlu0dhm5uj553pn6tald6dutqgksklqh@4ax.com

On 16 Jan 2005 21:06:06 GMT, rolavine@aol.com (Rolavine) wrote:

I've got an industrial control design problem.

I have to switch a signal through a relay or switch that not only meets
these
criteria, but is fairly cheap too, and it needs to be SPDT.

Signal is 120vac at 10 amps to 220Vac at 5 amps, but must be rated to a
dielectric strength of 5KV because a brief set of ignition pulses for HID
lamp
must travel through it. In operation the switch will never have to switch
the
high voltage pulse, but must be able to pass it. I've been looking for
ratings
of the dielectric strength. This design has to go through UL so I need a
part
that has a rating for these applications.

The only thing I've been able to come up with is using a connector with a
good
enough rating, and two jumper caps to select the signal. While I could do
this
it is an ugly approach. Come to think of it maybe I can sell this idea
because
it makes it hard to change the settings, hummm. If your given lemons make
features?

Any ideas, thanks.

Rocky

You didn't specify the coil voltage. Try these.
http://www.kilovac.com/high_volt.asp

Thanks but I knew about these and a host of other vacuum chamber type relays.
Click to expand...
This design can't afford this kind of solution so I can't use them at all.
Rather than go into this I just said the solution has to be cheap.

Oh one note, on my connector based solution I used the word caps to mean the
other end of the connector, not capacitors.

Rocky
 
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