Snubber circuit design

[www111]

Hi all,

I want to control (switch on/off) inductive motor(230Vac) via relay, and I should use a snubber circuit to suppress Voltage transients.
Do I have to connect the snubber across the relay contact or across the motor contacts (if across the motor , do I have to use 1 snubber(RC) per induktor coil?), and do I still need to use a protection diode for the relay across the contacts?

Best Regards

 

[ARQuattr]

It's best to place your snubber at the load, in my opinion, and you should probably use one at each inductive load. You wouldn't want to use a diode across the relay contacts in an AC circuit.

Here is a page that may be of more help: https://electronics.stackexchange.c...or-a-solenoid-relay-driving-an-inductive-load