Littelfuse PGR-3100 User manual
Tel: +1-800-832-3873
E-mail: techline@littelfuse.com
www.littelfuse.com/PGR-3100
Copyright © 2018 Littelfuse
All rights reserved.
Document: P95-EPI0-00000
PGR-3100 MANUAL
GROUND-FAULT INDICATION SYSTEM
Revision 6-A-060818
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REV. 6-A-060818
PGR-3100 Ground-Fault Indication System
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REV. 6-A-060818
PGR-3100 Ground-Fault Indication System
TABLE OF CONTENTS
1 FEATURES....................................................................1
2 DESCRIPTION ............................................................ 1
3 INSTALLATION .......................................................... 1
4 TECHNICAL SPECIFICATIONS
.................................. 4
LIST OF FIGURES
1 PGR-3100 Outline and Mounting Details ......... 1
2 Connection Diagram for an Ungrounded
240- to 600-V System ......................................... 2
3 Connection Diagram for Ungrounded
Systems above 600 V ......................................... 2
4 Connection Diagram for
Resistance-Grounded System up to 600 V....... 3
5 Connection Diagram for a
Resistance-Grounded System above 600 V .....3
DISCLAIMER
Specifications are subject to change without notice.
Littelfuse, Inc. is not liable for contingent or consequential
damages, or for expenses sustained as a result of a mal-
function, incorrect application, or incorrect adjustment.
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PGR-3100 Ground-Fault Indication System
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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 53428
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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PGR-3100 Ground-Fault Indication System
TRANSFORMER
ENCLOSURE
SERVICE
ENCLOSURE ØA
ØB
ØC
1 A 1 A 1 A
AL AH BL BH CL CH
L
G
120 V
LAMP
TEST
PGR-3100
GROUND-FAULT
INDICATION SYSTEM
NOTE 1
NOTES:
1. USE LTERMINALS FOR
SYSTEMS UPTO 240 V. USE
H TERMINALS FOR SYSTEMS
ABOVE 240 V UPTO 600 V.
TRANSFORMER
ENCLOSURE
SERVICE
ENCLOSURE ØA
ØB
ØC
1 A 1 A 1 A
AL AH BL BH CL CH
L
G
120 V
LAMP
TEST
PGR-3100
GROUND-FAULT
INDICATION SYSTEM
NOTES:
1. 120/√3 OR 240/√3 V PT SECONDARY
PT’S
NOTE 1
NOTE 2
2. CODES MAY REQUIRE
INTERLOCKED DISCONNECT
SWITCH
FIGURE 2. Connection Diagram for an Ungrounded 240- to 600-V System.
FIGURE 3. Connection Diagram for Ungrounded Systems above 600 V.
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REV. 6-A-060818
PGR-3100 Ground-Fault Indication System
TRANSFORMER
ENCLOSURE
SERVICE
ENCLOSURE ØA
ØB
ØC
1 A 1 A 1 A
AL AH BL BH CL CH
120 V
LAMP
TEST
PGR-3100
GROUND-FAULT
INDICATION SYSTEM
L
G
NEUTRAL
GROUNDING
RESISTOR
NOTES:
1. USE LTERMINALS FOR SYSTEMS UPTO
240 V. USE HTERMINALS OF SYSTEMS
ABOVE 240 V AND UPTO 600 V.
NOTE 1
TRANSFORMER
ENCLOSURE
SERVICE
ENCLOSURE ØA
ØB
ØC
1 A 1 A 1 A
AL AH BL BH CL CH
120 V
LAMP
TEST
PGR-3100
GROUND-FAULT
INDICATION SYSTEM
L
G
NEUTRAL
GROUNDING
RESISTOR
PT’S
NOTES 1&2
NOTES:
2. CONTACT FACTORY FOR
NGR-MONITOR COMPATIBILITY.
1. 120/√3 OR 240/√3 V PT SECONDARY
NOTE 3
3. CODES MAY REQUIRE
INTERLOCKED DISCONNECT
SWITCH
FIGURE 4. Connection Diagram for a Resistance-Grounded System up to 600 V.
FIGURE 5. Connection Diagram for Resistance-Grounded Systems above 600 V.
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PGR-3100 Ground-Fault Indication System
4. TECHNICAL SPECIFICATIONS
Phase Voltage
Input L, maximums.........................240 Vac to ground,
3.5 mA
Input H, maximums ........................600 Vac to ground,
4.5 mA
Lamp Test ...............................................Isolated 120 Vac,
1 VA maximum
LED Threshold .....................................30 Vac, minimum
Dielectric Strength.................................2,200 Vac, 1 minute
Shipping Weight ....................................0.3 kg (0.8 lb.)
Dimensions:
Height.............................................108 mm (4.3”)
Weight............................................88.9 mm (3.5”)
Depth..............................................54 mm (2.1”)
Environment:
Operating Temperature ..................-40 to 60°C
Storage Temperature .....................-55 to 80°C
Humidity.........................................85% Non-Condensing
Enclosure Rating ............................IP40 (When installed
on panel)
PWB Conformal Coating ........................MIL-1-46058 qualified
UL QMJU2 recognized
Certification............................................CSA, USA and Canada
UL Listed
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PGR-3100 Ground-Fault Indication System
MANUAL RELEASE
DATE MANUAL REVISION PRODUCT REVISION
(REVISION NUMBER ON PRODUCT LABEL)
June 08, 2018 6-A-060818
03
March 09, 2012 6
APPENDIX A
PGR-3100 REVISION HISTORY
MANUAL REVISION HISTORY
REVISION 6-A-060818
SECTION 1
Format updated.
PRODUCT REVISION HISTORY
PRODUCT REVISION 03
Table of contents
