2.9 Equipment Protection

Ground Fault Protection (GFP) is designed to detect and rapidly interrupt ____ equipment ground faults

Ground Fault Protection (GFP) operates on the same principle as ____ protection by monitoring the current drawn through the conductors of an electrical circuit and quickly shutting off power when the current is not equal.

Equipment Protection

• Ground Fault Protection (GFP)

• CURRENT TRANSFORMER (CT)

• SURGE PROTECTION  DEVICE (SPD)

• Transformer

A sudden increase in electrical current or voltage that is very short in duration is called power surge

• True

• False

Current transformer is a particular type of ____ transformer. It encircles the

conductors in the switchboard or panel board and produces a _____ output signal if all current flowing to the load does not return to the source through the phase or neutral conductors.

The low-current output in current transformer is sensed by a _____ with adjustable sensitivity and time delay settings. When a signal above the sensitivity setting persists beyond the time delay setting, the relay operates to _____ the switch or circuit breaker.

POWER SURGE is A sudden increase in electrical ______ or _________ that is very short in duration

Increase in electrical current or voltage causing power surge is caused by a lightning strike or by a sudden power spike caused by a problem in the utility transmission and generating system

• True

• False

• Secret

Power surge may damage sensitive equipment such as computers, TVs, machines, cellular phones, etc.

• True

• False

• Secret

Surge ____ is a measure of the level of surge that an ____ can withstand