Electrical Relays

They certainly can. You'll notice that there's a whole lot of listings at any relay vendor site for AC relays and DC relays. Now would you kindly explain to me why you've asked instead of doing some easy to find research yourself?

Dear Sir,

You have both the types.Imagine a situation where you have to control

Ac load but you have only a DC source for the relay coil. You will find that the

contacts are rated for AC and DC loads with deratings. This should not be a

problem to be discussed in CR4.

Manroop. Chennai

Dear

We are prefer dc voltage as auxiliary power supply for protection relays because different source from lighting or other ac sources to safe our relays continuously in services to protect the electrical line

thanks