[Amps] Solid state relays and step start

[Paul Kraemer]

Places still list Amperite time delay products as available
Paul K0UYA
----- Original Message ----- 
From: "Jim Carr" <n7fcf at hctc.com>
To: <garyschafer at comcast.net>; <Amps at contesting.com>
Sent: Thursday, March 04, 2010 3:05 PM
Subject: Re: [Amps] Solid state relays and step start


> 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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>
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