Industrial Grade Protection Relay is available in four types like earth leakage relay, voltage protection relay, current protection relay and frequency protection relay. The Protection Relay of the earth leakage type works on a trip setting range from 30mA to 30A and the voltage protection type works on an input power of 240V AC having a three phase motor. The Protection Relay of the current protection type works on three phase over current and operates with fail safe relay. Industrial Grade Protection Relay of the frequency protection type works on a frequency of 50Hz.