by davewill (Posted Sat, 24 Aug 2013 16:12:58 GMT)
ChrisM wrote:
... Well I want to make an EVSE that has relais for 3 different type2-cables: 13,20&32A. The PWM is always set to 32A or 53,33%. If a cable is connected that can't handle the 32A, for example a 20A cable, the EVSE measures automatically the resistance from PP-PE, and sets the PWM to 33,33% or 20A, and the EVSE controller will activate the 20A relais when the EV sets the state C. After the charging is done and the cable gets disconnected, the PWM sets itself to 32A again. ...
There would be no reason to have different relays. You only need one set that can handle the max amperage you want to support. Setting the pilot to the correct limit is all you would need to do.