The EL3100 is a self-powered ground-fault and phase-voltage
indication system for 3-phase systems. The EL3100 meets
the National Electrical Code (NEC) and the Canadian Electrical
Code (CEC) requirements for ground detectors for ungrounded
alternating-current systems. Voltage connections are provided
on the EL3100 for 208, 240, 480, and 600-V systems. Three
green LED’s on the EL3100 indicate the presence of phase-
to-ground voltage and one red LED indicates a ground fault.
The EL3100 can operate stand-alone or with up to five remote
LED indicators. A solid-state relay output provides indication
of a ground fault. The output relay is closed when the 3-phase
neutral voltage shifts as the result of ground leakage.
1
GROUND-FAULT PROTECTION
Simplified Circuit Diagram
A
B
C
Features & Benefits
FEATURES
NEC
®
and CEC Code
compliant
Low-voltage
remote LEDs
BENEFITS
Meets National Electrical Code (NEC
®
) Article
250.21 and Canadian Electrical Code Part 1, Section
10-106 (2) requirements for ungrounded systems
System voltage is not present at the remote
LED location
Indicates the presence of voltage on both
grounded and ungrounded systems
Allows for remote ground-fault indication
AH AL
G
BH BL
CH CL
DN
DR
DG
DA
DB
DC
Phase-voltage
indication
A
Remote
LEDs
EL3100
(Ground-Fault &
Phase-Voltage
Indicator)
Output
Relay
Output relay
Accessories
A
Remote LEDs
High-intensity 16-mm IP67 LED lamps
available in red and green colors.
Ordering Information
ORDERING NUMBER
MOUNTING
EL3100-00
ACCESSORIES
DIN, Surface
REQUIREMENT
Specifications
Input Voltage
Dimensions
Approvals
Conformally Coated
Warranty
Mounting
Input L: 208/240 Vac
Input H: 480/600 Vac
H
87.0 mm (3.43”);
W
112.5 mm (4.43”)
D
56.0 mm (2.2”)
CSA certified, UL Listed (E340889),
RCM (Australia)
Standard feature
5 years
DIN, Surface
RK-310X-0Y
Optional
Note: X=R for red LED and G for green LED
Y=0 for no label and 1 for a ground-fault label
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.
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.
A
Features & Benefits
FEATURES
1
GROUND-FAULT PROTECTION
Simplified Circuit Diagram
A
UNGROUNDED
SUPPLY
B
C
B
BENEFITS
Meets National Electrical Code (NEC
®
) Article 250.21(B)
and Canadian Electrical Code Part 1, Section 10-106 (2)
requirements for ungrounded systems
Indicates presence of a ground fault and the faulted
phase as well as phase-to-ground voltage on an
energized bus
Redundant long-life LEDs (two per phase) to
ensure reliability
(Insulation Monitor)
NEC
®
and CEC
Code compliant
C
Phase LEDs
Redundant LEDs
PGR-3100
(Ground-Fault
Indication System)
Lamp test button
PGR-3200
LEDs are operating
Verifies
L1
L2
Accessories
PGR-3100-PNL
Panel-Mount Enclosure
Ordering Information
ORDERING NUMBER
MOUNTING
PGR-3100
Panel mount
PGR-3100-PNL is the PGR-3100
integrated into compact stainless steel
enclosure for ease of installation and
retrofits. Options include visual alarm,
audible alarm with silence and reset.
Dimensions are 8”W x 8”H x 4” D.
ACCESSORIES
ORDERING
NUMBER
PGR-3100-PNL
-
OPTIONS
A
0 = No Options,
customer
supplied 120 V
lamp test
POWER
SUPPLY
B
0 = Low
Voltage
(120, 208,
240), c/w
fusing
-
ENCLOSURE
C
INDICATION
D
Specifications
Input Voltage
Indicator Off Voltage
Dimensions
Test Button
Approvals
Conformally Coated
Warranty
Mounting
Up to 600 Vac 50/60 Hz
< 30 Vac line to ground
H
88.9 mm (3.5”);
W
108 mm (4.3”);
D
54 mm (2.1”)
Local
CSA certified, UL Listed
Standard feature
5 years
Panel
0 = NEMA 4
Enclosure
1 = 316
Stainless Steel
1 = Transformer 1 = High
included for 120 Voltage
V lamp test
(480, 600),
c/w fusing
Future
Options
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.
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