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REV. 6-A-060818
PGR-3100 Ground-Fault Indication System
1. FEATURES
• Green LED’s indicate presence of voltage to ground for
each phase of a power system.
• A ground fault (or phase loss) is indicated when a set
of LED’s is off.
• LED’s are on when phase-to-ground voltage exceeds
30 Vac.
• Redundant LED’s are used for reliability.
• Pressing LAMP TEST causes all LED’s to light.
NOTE: The LAMP TEST feature requires an isolated
120 Vac supply.
• Direct connection for voltages up to 600 Vac line to line.
• Potential transformers (PT’s) are required for voltages
greater than 600 Vac.
• Provides faulted-phase indication for resistance-grounded
systems and ungrounded systems.
2. DESCRIPTION
The PGR-3100 is a self-powered ground-fault indication
system. Presence of phase-to-ground
voltage is indicated by redundant LED’s (two per phase).
The respective phase LED’s are off when phase-to-ground
voltage is less than 30 Vac. The PGR-3100 meets the
National Electrical Code requirements for ground detectors
for ungrounded alternating-current systems as defined
in NEC 250.21. It also meets the Canadian Electrical Code
requirements for ungrounded alternating-current systems in
accordance with CEC 10-106(2).
3. INSTALLATION
Outline and panel-mounting details are shown in Fig.1.
For 208- to 600-Vac systems, connect the PGR-3100 directly
to the three-phase bus. For 208- or 240-volt installations, use
terminals AL, BL, and CL. For systems above 240 V and up to
600 V use terminals AH, BH, and CH. See Figs. 2 and 4.
For systems above 600 V, install PT’s as shown in Figs. 3
and 5.
Connect terminal G and chassis-bonding terminal ( )
to ground.
For LAMP TEST connect 120 Vac supply to terminals L and
G. Connection and use of LAMP TEST circuit is optional.
AH
POWR-GARD
GROUND-FAULT INDICATION SYSTEM PGR-3100
SERIES
A B C
LAMP TEST
GROUND FAULT PRESENT WHEN
ANY INDICATOR OFF
ALBHBLCHCL
Rev:
Phase Voltage:
Phase Current:
Lamp-Test Supply:
208-600 Vac, 50/60 Hz
50 mA Maximum
1 VA, 120 Vac 50/60 Hz
PGR-3100
GRO UND -FAULT INDICATION SYS TEM
Serial No:
00
ELXXXXYYYYY
1-800-TEC-FUSE (1-800-832-3873)
Made in Saskatoon, Canada
LR 53 42 8
USC
R
108.0
(4.25)
95.3
(3.75)
76.2
(3.00)
88.9
(3.50)
6.4
(0.25)
95.3
(3.75)
6.4
(0.25)
76.2
(3.00)
101.6
(4.00)
69.9
(2.75)
3.2
(0.13)
FACEPLATE OUTLINE
4.0 (0.16) DIA
6.4 (0.25) R
MOUNTING DETAIL
FRONT
SIDE
52.4
(2.06)
FIGURE 1. PGR-3100 Outline and Mounting Details.
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