Over Voltage Relay, 1 Phase AO-200

Voltage Setting : 220V to 320V
Time Setting : 1 to 10 sec

Asian Under + Over voltage relay find application in effective protection of equipment’s such as genet, motors, pumps, trans, Shunt capacitors etc. from damage due to transient under voltages. These are also used to sense blackouts and brownouts and to control auto start stops of engines and genets e.g. In AMF panel. The input voltage is continuously checked and the value measured is compared against a preset generates a changeover signal. Two sets of potential free changeover contacts are provided for breaker tripping. The relay resets automatically when the input is within limits. A fixed time delay of 2-4 sec on low and high signal is also given after comparison to suppress false tripping as in case of transients. Under and over voltage are externally suitable on front facia by
two potentiometers. A hysteresis of about 5-15. Volts between dropout and pickup is provided to avoid sharp cutoffs. The relay remains off when is low or zero or high than set limit and when voltage is healthy the relay is on. (This care of no volt operation) LED indicator Display the status.