Under Voltage Relay | Under and Over Voltage Relay Connection | Under Voltage Relay Circuit Diagram
Under Voltage Relay | Under and Over Voltage Relay Connection | Under Voltage Relay Circuit Diagram
In this video you will learn about Under Voltage Relay | Under and Over Voltage Relay Connection | Under Voltage Relay Circuit Diagram
1-What is the under voltage relay.
A relay that has contacts that operate when the voltage drops below a set voltage. Under voltage relays are used for protection against voltage drops, to detect short-circuit faults, etc.
2-How does an under voltage relay work.
An under-voltage relay operates when the voltage that flows through a relay's coil falls below a predetermined value. Under-voltage relays protect loads against voltage drops that can lead to power shortages and brown-outs. The relay contacts trip the circuit breaker when the voltage decreases to a certain level.
3-What causes under voltage.
Under voltage conditions are usually be caused by undersized or overloaded utility and facility transformers. During peak demand periods and/or when the utility is experiencing problems, the demand for power exceeds the capability of the transformer and as a result the voltage drops.
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