Module 4 test

The resistance of switch gear should be checked using

1000 V Mehgometer

When performing thermographic surverys, a major deficiency is indicated by a gradient of

16 degrees c

Wires from the ground fault relay to the trip coil should be no longer than

50 ft

The standard output voltage of potential transformer is 120 V or

69.3 Volts

Which of the following abbreviation is used on electrical drawings to represent on oscilloscope

CRO

Field marking of service equipment shall include the

Date the fault current calculation was performed

Substation transformers used to reduce the voltages and currents in the primary circuits to the levels used in metering equipment are known as

Instrument transformers

A test that can be used to detect loose connection is an

Insulation resistance test

The continuous current that a circuit breaker can carry without exceeding a standard temperature rise is known as the

Overload rating

The basic purpose of switchgear is to provide a means of switching or disconnect power system apparatus and

Provide power system protection by automatically isolating fault components

Busbars are typically made of

Silver plated or tin plated copper or tin plated aluminum

The maximum 60 Hz voltage that can be applied to a switch for one minute

Withstand rating

The three sections of switchgear enclosures are the front section, the Bus section, and the

cable or termination section

A type of oil filled current transformer is the

donut type

According to the NEC, neutral conductors size no.6 and smaller must have a continuous marking of white or

gray

The three basic methods of sensing ground faults are zero sequence, residual, and

ground return

Thermographic surveys are conducted using

infrared imager