A solid-state phase monitoring relay provides protection in the event of a(n)_______ .
A)power failure
B)power brownout
C)abrupt startup
D)voltage unbalance

Question

Quizplus · Accepted Answer

A solid-state phase monitoring relay provides protection against voltage unbalance, which occurs when the voltage supplied to three-phase equipment varies for any reason, such as a blown fuse or a faulty connection. This can cause the equipment to operate inefficiently, overheat, or fail prematurely. A phase monitoring relay detects voltage imbalances and shuts down the equipment to prevent damage. It does not provide protection in the event of power failure, brownout, or abrupt startup. A solid-state phase monitoring relay monitors the voltage levels on all three phases of a power system and provides protection in the event of voltage unbalance, which can cause damage to motors and other equipment. Power failure, power brownouts, and abrupt startup are not directly related to voltage unbalance and therefore not the best choice for this question.

A Solid-State Phase Monitoring Relay Provides Protection in the Event