Re: Whats the purpose of power relay in DC power supply ?
@KlausSt: Yes, this is battery charger and not a power supply.
@D123: I should have mentioned that in the first place, The charger only contained Transformer, Rectifying diodes, Power relay(with cap to it terminal, maybe to avoid debouncing of relay) and connectors. It was dissassembled and i had to assemble it again so i couldn't figure out why power relay is used in this circuit, therefor i kept it out.
@schmitt trigger: I don't have battery right now but the DMM readings are showing DC ~15v (OFF-Load). I test its drop out voltage and at around ~2A resister load, it's voltage drops to 11v and i thing that's not a good indication. But the battery aren't resistive load, i think they behaves like capacitor so the dropOut won't be that much when connected to automobile battery, correct me if i am wrong here.
I would like to know the purpose(s) of this relay in this kind of circuit, and i know that without schematic it should be harder to guess but i will like to know the different possiblities of its existance in this kind of ciruit.