Re: [TCML] SSRs?

[David Speck <Dave@xxxxxxxxxxxxxxxx>]

Matt,

Based solely on my own experience, I'm not a huge fan of SSRs for TC 
use, for the following reasons:
Our loads are usually highly inductive, and many ordinary SSRs don't 
like inductive loads.
The inputs of SSRs are very sensitive, and may be falsely triggered by 
the high RF levels inherent in TC work, with undesirable results.
Most importantly, many SSRs have low levels of leakage current, even 
when "Off", perhaps just a handful of milliamps.  This is no problem if 
the load is a light bulb or a motor.  However, if you pass this small 
current through a step up transformer, you can end up with a really 
unpleasant surprise from a "deenergized" system.
For my systems, I use only good old fashioned electromechanical relays.  
YMMV.
Dave


On 10/15/2014 2:20 PM, mddeming--- via Tesla wrote:

 
Has anyone had experience with using solid state relays in medium-size TC Control panels, such as:
Solid State Relay SSR-40DA 40AMP 3-32VDC Output 24-380V AC Solid State Module?

Matt D


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