We are trying to control a bunch of 3 phase contactors using an HMI. The contactors' coils are activated by two lines of the 240V 3 phase source (L1 and L2).
We are trying to figure out if the relays needed for activating the coils should be rated at 120V or 240V, or if we need another type of relay.
We did a test with 120V relays(SSR) but one of the contactors' coil burned out after leaving it connected(OFF State) for about 3 days, we measured for current leakage on the relays but we didn't get any measure. We did another test measuring the current with a manual activation using a button an we get a reading of 70mA when contactor is ON.