Solid State Relays

Forum 2005-2010 (read only) Hardware Interfacing
1

When using solid state relays for inductive and resistive AC loads, does it matter if you use zero crossing, or non-zero crossing ssr's?

Thanks for the help.

2

Using non zero point crossing SSRs will increase the electrical noise generated by the relay at switch on. This noise can affect other close by electronic circuits and cause them to miss fire or malfunction.

With zero point crossing detection the voltage is applied smoothly over the first cycle.

Without it the voltage may suddenly be applied at any point in the mains cycle but that is exactly the same case when you are using a mechanical switch.

3

Thanks Mike. I really appreciate the reply.