Why are relay contacts welding with a 1/8 HP motor and 1/4 HP relays?

[jloom977]

I am using an 1/8 HP motor with an SCR type dc drive and 1/4hp AC single phase control relays. I keep having a problem with welded relay contacts. Should I go to 1H/P relays? I don't know why I would have to being the HP of the motor is lower that the relay?

 

[Dr. Courtney]

Motors draw a lot more current on start-up.