• Puneet Industrial Controls Private Limited

Under Cum Over Voltage Relay

Puneet Industrial Controls offers an Under Cum Over Voltage Relay. This is a compact micro-electronic device based on latest technology. It senses the voltage supply at its terminals and operates electromagnetic relay when voltage is within the under and over voltage settings. The relay gets de-energised for both under and over voltage conditions. For reliable operation of the unit, both On and Off time delays (adjustable) are provided. These delays are independently adjustable from 1 to 15 secs. For under voltage condition the relay gets de-energised when the voltage falls below the set value. For this the On/Off differential (back-lash) voltage is adjustable in case of mains supply sensing, due to variable supply line conditions, whereas for alternator supply sensing, back-lash voltage is factory set. For over voltage condition also a factory set back lash is provided to avoid chattering. Both under and over voltages and time delay are continuously adjustable with the help of knob over a linear calibrated dial. Auxiliary voltage of 12 V DC or 24 V DC can be provided for mains voltage relay, if trip time delay is required in the event of total AC supply failure to the unit. Two changeover contacts are provided for customer usage. Four LEDs (light emitting diodes) are provided on top of the unit to indicate 'voltage supply on', 'relay on', 'under voltage' and over voltage conditions. Features: common setting for all the phases; adjustable/factory set On/Off voltage differential (back-lash); unaffected by frequency variations; positive action without chattering; consistent accuracy and reliability; and life-time guarantee of the unit.