Electrical Test Equipment Flashcards
instruments used to measure current
in electrical circuits. Available in clamp-on and halo
styles.
Ammeters
instruments
used to locate faults on primary underground cable and are
composed of a time domain reflectometer (TDR) and a surge
generator.
Arc Reflection Systems
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.
Cable Locator
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.
Conductive/Inductive Tracing
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.
DC Hi-Pot Tester
an electrical
device used in conjunction with the surge generator to determine
the exact location of a primary underground cable fault.
Digiphone Pinpointer
used to read voltage
and test continuity on low-voltage circuits and equipment. There
are many different types with varying functions.
Digital Multimeter
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.
Insulation Power Factor Tester
Also referred to as a “Megger,” a device used to test the insulation in electrical apparatus,
cables, wire, or networks.
Insulation Tester
instruments that are used to
check the condition of each insulator of a string. These meters can
be used while the line is energized.
Insulator Tester
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.
Micro-Ohmeter
instruments used to determine the
insulating strength of insulating oils used in transformers, circuit
breakers, and other electrical apparatus
Oil Tester
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.
Phase Sequence Indicator
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.
Phasing Meter
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.
Recording Volt/Ammeter