Over Voltage Relay

Over Voltage Relay senses the voltage supply at its terminals and operates electromagnetic relay in case of over voltage condition. The relay gets energised/ON for over voltage condition in any of phases. Over voltage setting and On/Off Time delays are continuously adjustable with the help of a knob over linear calibrated dial.

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Detailed Description for Over Voltage Relay

A relay is an electrically operated switch. Many relays use an electromagnet to mechanically operate a switch, but other operating principles are also used, such as solid-state relays. Relays are used where it is necessary to control a circuit by a low-power signal, or where several circuits must be controlled by one signal.


Principle of operation:

·         This voltage relay is based on the principle of precise sensing of actual voltage and w.r.to pre-set levels of permissible over & under voltage. Offered voltage relay activate protection circuit when the voltage crosses pre-set limit. Further, inform about this by activating alarm and indicating using LED.



·         Microprocessor based

·         Designed by the experts

·         Made using quality approved glass epoxy boards and integrated circuits

·         Easy to configure

·         User friendly

·         Absorb power supply transients using filter circuit and stabilized power supply

·         Stable display & display output help to view distance of more than 4 meter

·         Separate relay output for under & over voltage setting

·         User selectable Auto/ manual mode of resetting

·         Common relay output for any of the alarm condition



·         Water purification and treatment plants

·         Paper and pulp industry - washers, head box feed, bleachers

·         Sugar industry - Pan Alteration, Dialler automation

·         Chemical and petrochemical industry

·         Primary & auxiliary temperature controller for boilers

·         Water pumping stations, power plants and under & over Voltage Relay heat treatment furnaces

·         Seven segment LED display is provided for indication of settings and actual conditions



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