We are offering Teco voltage monitor relays are used in protection of gensets, motors, pumps, transformers & shunt caps etc. From damage due to transient blackouts, burnouts and for auto start stop of amf panel. A low or high in all or any phase generates a changeover signal. Two potential free changeover contacts are given for breaker tripping, relays is auto reset. Both time and voltage are settable hysteresis of 5v-15v for transient protection is provided. All contacts are 5a.