Littelfuse PGR-3100 Series - Manual

Protection Relays & Controls
© 2013 Littelfuse Protection Relays & Controls
Ground-Fault Protection – Ungrounded AC Systems
PGR-3100 SeRieS
Ground-Fault Indication System
Description
The PGR-3100 indicates the presence of voltage on each
phase of a three-phase system. The LEDs on the panel
illuminate when voltage is present. When a ground-fault
occurs, the voltage on the faulted phase reduces to ground
potential, causing the LEDs for the faulted phase to dim
and the LEDs for the unfaulted phases to become brighter.
Ungrounded ac systems are required by the National
Electrical Code (NEC ® ) Article 250.21(B) and the Canadian
Electrical Code Part 1, Section 10-106 (2) to have ground
detectors, such as the PGR-3100, installed on the system.
External potential transformers (PTs) can be used to step
down system voltage, allowing the PGR-3100 to be applied to
any system voltage. PTs are not required for system voltages
up to 600 Vac. Also available mounted in NEMA 4 enclosure.
Specifications
Input Voltage Up to 600 Vac 50/60 Hz
Indicator Off Voltage < 30 Vac line to ground
Dimensions H 88.9 mm (3.5”);
W 108 mm (4.3”);
D 54 mm (2.1”)
Test Button Local
Approvals
CSA certified, UL Listed
Conformally Coated Standard feature
Warranty 5 years
Mounting Panel
ORdeRinG nUmbeR mOUnTinG
PGR-3100 Panel mount
Ordering Information
Simplified Circuit Diagram
FeATUReS beneFiTS
NEC ® and CEC Code
compliant
Meets National Electrical Code (NEC ® ) Article
250.21(B) and Canadian Electrical Code Part 1,
Section 10-106 (2) requirements for ungrounded
systems
Phase LEDs
Indicates presence of a ground fault and the
faulted phase as well as phase-to-ground
voltage on an energized bus
Redundant LEDs
Redundant long-life LEDs (two per phase) to
ensure reliability
Lamp test button Verifies LEDs are operating
Features & Benefits
A
PGR-3100
UNGROUNDED
SUPPLY
B
C
A
L2
PGR-3200
L1
B
C
(Ground-Fault
Indication System)
(Ground-Fault
Protection System)
Rev: 4-B-050213
Based on Manual Rev 6
Littelfuse reserves the right to make product changes, without notice. Material in this document is as accurate as known at the time of publication. Visit Littelfuse.com for the most up-to-date information.
Littelfuse.com/PGR-3100