[Amps] Solid state relays and step start

[Jim Carr]

Question. Are the plugin thermal delay relays still manufactured. We used 
them a lot twenty five years ago in manufacturing and large scale 
refrigeration control. They plugged into an octal socket and had beefy 
contacts. They were relativly inexpensive at the  time.
Jim
----- Original Message ----- 
From: "Gary Schafer" <garyschafer at comcast.net>
To: <Amps at contesting.com>
Sent: Thursday, March 04, 2010 12:53 PM
Subject: [Amps] Solid state relays and step start


> Has anyone had problems using a solid state relay to short out the step
> start resistor in a power supply?
>
> I have heard of problems of not enough current thru the SS relays (when 
> amp
> is in standby) when used as the primary on/off relay. Sometimes a resistor
> has to be placed in parallel with the transformer primary so the relay 
> works
> properly.
>
> When used in a step start circuit the current could be quite low as well 
> as
> the voltage at the relay due to the resistor across the relay.  Any issues
> here?
>
> 73
> Gary  K4FMX
>
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