Littelfuse PGR-4300 User Manual

Protection Relays & Controls

Generator & Single-Function Protection–Ground Fault

PGR-4300 SERIES (GFA300)

Generator Ground-Fault Relay

Simplified Circuit Diagram

G

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 time delay
(0 - 1.0 s)

Output contacts

Analog output
(0 - 1 mA)

N-G continuity alarm

Passive filtering Eliminates nuisance tripping

Adjustable trip setting provides a wide range of
protection and allows system coordination

Adjustable trip delay allows quick protection and
system coordination

Form C ground-fault output contacts for alarming
or tripping purposes

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

PGR-4300

(Generator
Ground-Fault Relay)

Ordering Information

ORDERING NUMBER CONTROL POWER

PGR-4300-12 12 Vdc

PGR-4300-24 24 Vdc

PGR-4300-120 120 Vac

ACCESSORIES REQUIREMENT

PGA-0500 Optional

PMA-55 Optional

PMA-60 Optional

Note: For o ptional conforma l coating please consult factory.

Accessories

PGA-0500 Analog % Current Meter

Optional panel-mounted analog meter
displays ground-fault current as a
percentage of the set-point.

Specifications

IEEE Device Numbers Ground Fault (50G/N, 51G/N)
Input Voltage See ordering information
Dimensions H 75 mm (3.0”); W 55 mm (2.2”); D 115 mm (4.5”)
Trip Level Settings 100-1200 A
Trip Time Delay Settings 0-1.0 s
Contact Operating Mode Non-fail-safe
Test Button Local
Reset Button Local and remote
Output Contacts Form C
Approvals UL Listed
Analog Output 0-1 mA
Conformally Coated Consult factory
Warranty 5 years
Mounting DIN, Surface (standard)

Panel (with PMA-55 or PMA-60 adapter)

© 2013 Littelfuse Protection Relays & Controls
Littelfuse.com/pgr-4300

Rev: 4-A-050213

Based on Manual Rev 3