PGA-016A Littelfuse Inc, PGA-016A Datasheet - Page 41

• Manufacturer Part Number: PGA-016A
• Description: BULK / WATERTIGHT COVER FOR PGR-6200 / PGR-7200
• Manufacturer: Littelfuse Inc

Specifications of PGA-016A

• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

© 2009 Littelfuse
Ground Check Loop
ground-check conductor, ground-check termination device,
ground-continuity monitor, and ground conductor.
Ground Check Termination
the end of the ground-check loop to terminate the measuring
signal from the ground continuity monitor.
Ground Continuity Monitor
continuously monitors a ground conductor and trips if this
conductor opens or shorts to the ground-check conductor.
Ground-Fault
conductor and ground or equipment frame. The words
“ground” and “earth” are used interchangeably when it
comes to electrical applications.
Ground-Fault Current
the supply neutral through the ground-fault and the ground-
return path.
Ground-Fault Relay
detect a phase-to-ground-fault on a system and trip when
current exceeds the pickup setting for greater than the trip
time setting.
Ground-Fault Protection
equipment from damaging ground-fault current by operating
a disconnecting means to open all ungrounded conductors of
a faulted circuit. This protection is at current levels less than
those required to operate a supply circuit overcurrent device.
Ground Reference Module
limits ground-fault current to 25 mA and provides a signal to
a dc ground-fault relay.
Harmonic Filter
ignore non-fundamental frequency components of a signal.
Harmonic Frequency
components (voltage and current) are multiples of the
fundamental frequency and, in a power system, can be
considered noise. Harmonic-frequency components are often
present because of the use of adjustable-speed motor drives.
High-Resistance Grounding
ground resistor (NGR) to limit the current to a low level.
Typically high-resistance grounding is 25 A and lower. (Also
see: Low-Resistance Grounding).
High Tension Coupler
down line voltage to a usable level for a relay.
I
capacity. In motor protection, thermal capacity is used to
POWR-GARD
Glossary of terms
2
t (I squared t)
•
POWR-GARD
– Unintentional contact between a phase
– Thermal capacity, or used thermal
®
– A device or method to remove or
Protection Relay Catalog
®
Protection Relays
– A protection relay designed to
– The circuit that includes the
- Harmonic-frequency
- An accessory used to step
– The current that returns to
– A system that protects
– A resistor network that
– A device installed at
- A protection relay that
– Using a neutral-
39
measure and describe motor heating in terms of current (I).
This method is more accurate than temperature sensing
because of temperature-sensor placement and the time
delay inherent in temperature measurement.
IEEE Device Numbers
equipment are referred to by numbers, according to the
functions they perform. These numbers are based on a
system which has been adopted as standard for automatic
switchgear by IEEE. This system is used on connection
diagrams, in instruction books and in specifications.
Insulation Monitoring
from phase to ground to detect insulation breakdown on
a system.
Insulation Resistance
of an insulator, such as a cable jacket, to prevent current
flow under the stress of a voltage; typically measured in
mega-ohms. Insulation-resistance change can be monitored
to predict impending failure.
Insulation Warning
decrease in insulation resistance below a pre-determined value.
Integrated Motor Starter
motor-protection relay, with the built-in ability and a user
interface to start and stop a motor.
Inverse-Time Ground-Fault Protection
A method by which time-to-trip of a protective device,
such as an overcurrent relay or ground-fault-current relay,
decreases as the magnitude of the fault increases.
Leakage Current
typically measured in milliamperes (mA, thousandths of
amperes).
Low-Resistance Grounding
Grounding System that allows high currents to flow during
a ground-fault. Typically 100A and higher is considered Low-
Resistance grounding. (Also see: High-Resistance Grounding)
LSIG Protection
time, and instantaneous overcurrent, and ground-fault
protection; a term often used to describe protection required
for a power-distribution feeder, or a protection relay with
these functions.
Motor Lockout
the operator is prevented from starting the motor.
Motor Protection
protect the windings of a motor from high current levels.
Modern motor protection relays add many additional features,
such as metering, data logging and communications.
- A condition where for safety reasons,
– An acronym for long-time, short-
– Very low level ground-fault current,
– Overload protection designed to
– A warning alarm triggered by a
– A measurement of the ability
– The devices in switching
– Monitoring the resistance
- A device, such as a
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– A Resistance-
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