Electrical Test Equipment Flashcards

1
Q

instruments used to measure current
in electrical circuits. Available in clamp-on and halo
styles.

A

Ammeters

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

instruments
used to locate faults on primary underground cable and are
composed of a time domain reflectometer (TDR) and a surge
generator.

A

Arc Reflection Systems

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

instruments used to trace the
route of underground cables. They are commonly used as the first
step in fault locating, and consist of a transmitter and hand-held
receiver.

A

Cable Locator

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

refers to the two most common methods of connecting a cable
locator. The conductive method is where the transmitter is
connected directly to the conductor. The inductive method is where
the transmitter is placed over the cable route.

A

Conductive/Inductive Tracing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

a device that attaches
directly to the meter end of a phasing tester and is used to test
cables for faults. This instrument does not locate a fault, it simply
indicates the integrity of a run of cable.

A

DC Hi-Pot Tester

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

an electrical
device used in conjunction with the surge generator to determine
the exact location of a primary underground cable fault.

A

Digiphone Pinpointer

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

used to read voltage
and test continuity on low-voltage circuits and equipment. There
are many different types with varying functions.

A

Digital Multimeter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

used primarily in substations on subtransmission and
transmission equipment. This instrument is used to detect a
breakdown in insulation, which can impact the power factor of a
circuit.

A

Insulation Power Factor Tester

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Also referred to as a “Megger,” a device used to test the insulation in electrical apparatus,
cables, wire, or networks.

A

Insulation Tester

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

instruments that are used to
check the condition of each insulator of a string. These meters can
be used while the line is energized.

A

Insulator Tester

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

an instrument used
to measure very low levels of resistance. Its most important
application is to test the resistance of contacts in substation
switches and circuit breakers.

A

Micro-Ohmeter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

instruments used to determine the
insulating strength of insulating oils used in transformers, circuit
breakers, and other electrical apparatus

A

Oil Tester

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Also known as the rotation meter,
is a low-voltage instrument used
as a reference tool. It ensures that the phase sequence is not
accidentally changed due to maintenance work performed on a
transformer bank or three-phase pad-mount transformer.

A

Phase Sequence Indicator

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

a high-voltage instrument
used to read voltage and prove phase sequence. Proving phase
sequence is necessary when work is performed on a junction of the
main line feeder circuit in both overhead and underground.

A

Phasing Meter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

These instruments are used when a
problem exists on a secondary circuit or service. The problem may
occur at random times and is undetectable during a single visit by a
utility technician. These instruments can be attached and left at the
location for a given period of time.

A

Recording Volt/Ammeter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

a specialized device used to confirm when a regulator is in the
neutral position.

A

Regulator Neutral Detector

17
Q

used on
underground secondary and service cables to determine the exact
location of a fault.

A

Secondary Fault Locator

18
Q

troubleshooting devices used to apply load to service conductors
while the customer’s main is opened. This allows a determination
to be made as to whether the problem exists on the utility or
customer side of the meter.

A

Service Conductor Tester

19
Q

Also referred to as a thumper, is used to apply a current to a faulted cable. With the aid of a
listening device such as the digiphone pinpointer, a lineworker can
listen for the electrical discharge at the fault location. This allows for
accurate and precise fault location.

A

surge generator

20
Q

used to determine the distance from the
connection point to the fault on underground cable. This device has
a scope that displays a wave that shows small waves and dips that
indicate the location of splices, transformers, and faults.

A

Time Domain Reflectometer (TDR)

21
Q

used to verify the turns ratio between the primary and secondary
coils of a transformer.

A

Transformer Turns Ratio Tester

22
Q

used to check for the
presence of voltage on an electrical circuit. These devices are most
commonly used prior to installing personal protective grounds.

A

Voltage Detector

23
Q

most commonly used on primary lines and equipment energized
between 2kV and 34.5kV. Reading and understanding your
company’s policies and the manufacturer’s recommendations
are critical before using any of these instruments. Always wear
approved personal protective equipment when using these
instruments.

A

High-voltage Test Equipment

24
Q

most commonly used on secondary lines and equipment energized
between 0 and 600 volts. Customer contact is common when
working with these instruments, because the circuits being tested
are often connected to customer property.

A

Low-voltage Test Equipment

25
Q

Explain Phase Sequence

A

Phase sequence refers to the order the
three phase conductors are connected to lines or equipment.
It is important to maintain phase sequence when performing
maintenance work on the phase conductors. Phasing sets are
used on primary lines, and phase sequence indicators are used on
secondary lines to help ensure that phase sequence is maintained.

26
Q

Explain the Phasing Procedure

A

Phasing a primary feeder consists of the
following steps:
1. Proof test the meter
2. Adjust the meter to the proper setting
3. Verify the correct voltage on both sides of the open point
4. Confirm phase sequence

27
Q

Explain Primary Fault Locating

A

Primary fault locating is most commonly
performed with arc-reflection systems. These systems consist of
a TDR and surge generator. The TDR determines the approximate
distance to the fault and the surge generator, used with a sensitive
listening device, helps determine the exact location of the fault.

28
Q

Explain Secondary Fault Locating

A

Secondary fault locating is usually
performed on direct buried cable. The route of the cable is first
determined using a cable locator. A transmitter is then attached
to the cable which emits a signal at the point of the fault that is
detected by a receiver. This manual depicted an “A” frame style
receiver on page 44, however, there are other types available.

29
Q

Explain Substation Test Equipment

A

Many different instruments are used in
substations. Substation test equipment is complex and requires a greater
level of understanding and training than required for many of the instruments
used on low-voltage and high-voltage lines.