| Hi Stan,
I think if you take a hammer to one of those contactors and look inside you will not be favorably impressed. I had one fall apart on my power grid as a result of an installation error. This caused me to look into the specs. Here are some issues to think about: - What is the max current at which the unit will disconnect? - What is the coil hold current (amount to keep it closed)? - What is the susceptibility to contact deformation....and what kind of electronic protection do I want to provide for that? - Max # cycles
I ended up going with Kilovacs. These are still mechanical. They are expensive but quite a bit more robust. You can look up on the web.
I'm sorry I don't know much about solid state relays. I bet VP has some opinions.
Colyn On Apr 25, 2012, at 10:19 AM, Stan Fields wrote: I am doing the wiring of my Legacy and would like the group's advice on the use of Solid State Relays like <image002.png>SSRDC50V80A Relay Datasheet <image006.png> They are about the same cost, and handle the same load but are there other reasons why I haven't seen the SSRs used. I am using the Vertical Power VP-X which makes extensive use of Solid State Relays so I wonder if their time has come and I should design the power distribution with SSRs? Stan Fields L2K - 201 Austin |