Protection Relays & Controls
Generator & Single-Function Protection–Ground Fault
PGR-4300 SERIES (GFA300)
Generator Ground-Fault Relay
Description
The PGR-4300 Generator Ground-Fault Relay provides
a simple method for detecting a ground-fault condition
on generators without the need for current transformers
(CTs). This greatly simplifies the installation. In addition,
it is compatible with both three- and four-pole transfer
switches. This relay also monitors the neutral-to-ground path
for continuity. The PGR-4300 is ideal for any generator or
application where there is not sufficient space to install CTs.
Features & Benefits
FEATURES
BENEFITS
No CTs required
Saves space and simplifies installation
Adjustable pickup
(100-1200 A)
Adjustable trip setting provides a wide range of
protection and allows system coordination
Adjustable time delay
(0-1.0 s)
Adjustable trip delay allows quick protection and
system coordination
Form C ground-fault output contacts for alarming
or tripping purposes
Simplified Circuit Diagram
Output contacts
Analog output
(0-1 mA)
Provides means for connecting to an optional
meter (PGA-0500) or control system
Monitors neutral-to-ground integrity and alarms if
ground path becomes open circuit
G
N-G continuity alarm
Passive filtering
Eliminates nuisance tripping
Accessories
PGR-4300
(Generator
Control
Power
PGA-0500 Analog % Current Meter
Ground-Fault Relay)
Optional panel-mounted analog meter
displays ground-fault current as a
percentage of the set-point.
Specifications
IEEE Device Numbers
Input Voltage
Ground Fault (50G/N, 51G/N)
See ordering information
Ordering Information
ORDERING NUMBER
PGR-4300-12
Dimensions
H 75 mm (3.0”); W 55 mm (2.2”); D 115 mm (4.5”)
100-1200 A
0-1.0 s
Non-fail-safe
CONTROL POWER
12 Vdc
Trip Level Settings
Trip Time Delay Settings
Contact Operating Mode
Test Button
PGR-4300-24
24 Vdc
Local
Reset Button
Local and remote
Form C
0-1 mA
Consult factory
UL Listed (E183688)
5 years
PGR-4300-120
120 Vac
Output Contacts
Analog Output
Conformally Coated
Approvals
Warranty
Mounting
ACCESSORIES
PGA-0500
PMA-55
REQUIREMENT
Optional
Optional
DIN, Surface (standard)
Panel (with PMA-55 or PMA-60 adapter)
PMA-60
Optional
Note: For optional conformal coating please consult factory.
Rev: 4-A-042018
Based on Manual Rev: 3-B-041318
© 2018 Littelfuse Protection Relays & Controls
Littelfuse.com/pgr-4300