[howanc7]

Both my retrofit package, and my inverter drive, may need me to fit snubbers, to the AC Coils. To be on the safe side, I guess it is best to fit them. Can anyone suggest suitable components and circuits, for small 200 VAC contactor coils and 100VAC solenoid Coils. I may also use 12VDC (Omron Style, PCB Mount) relays, to drive the solenoids, from the retrofit PLC. What is a suitable snubber for these?

thanks and regards, Colin

[Al_The_Man]

Many contactor manuf make a cust clip in snubber for their products, if you want to roll your own, this PDF may help.
Al.

[howanc7]

Now I am really confused. I thought the problem was with the coils, not the contacts. This PDF of snubbers, shows the snubber going in parallel to the load being connected by the contactor. Where as I thought the problem was in the contactor, or solenoid coils, and the snubber went in parallel with the coil?

The price of snubbers can build up, especially when we have 4 contactors and 7 solenoids to deal with. Can you use cheaper components and make the snubber circuit myself?

Colin

[Al_The_Man]

Actually in the application examples, it shows both across load (coil) and contacts.
I usually fit them across the load.
The AC snubber is just a resister in series with a quality AC rated capacitor which you can pick up at places like Digikey etc.
Al.