Littelfuse Startco NGRM-ENC User manual

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NGRM-ENC MANUAL
ENCLOSED NEUTRAL-GROUNDING-RESISTOR MONITOR
Revision 0-B-030515
NGRM-ENC
CONTROL
POWER
GROUND
FAULT
RESISTOR
FAULT
RESET
USB
PHASE
A
PHASE
B
PHASE
C
ON
PULSE
ENABLE
LEAKAGE
CURRENT
OFF
NGRM-ENC
ON
PHASE
A
PHASE
B
PHASE
C
0.1
0.5 0.7 1.0
2.0
3.0
5.0
10.0
4
10
8
20 40
60
680
100
MEM2
1.0
1.2
1.4
1.6
1.8 2.0 2.2
2.4
2.6
2.8
3.0
SE-330NEUTRAL-GROUNDING-RESISTOR
MONITOR
0.2
0.3
0.4 CAL
RESET
GF TRIP TIME (s) PULSE PERIOD (s)
GF TRIP LEVEL
(% CT RATING)
LITTELFUSE STARTCO
TRIP
GROUND
FAULT
POWER
RELAYK1
DIAGNOSTIC
CALIBRATED
TRIP
RESISTOR
FAULT
60
170
130
200 340
800
100 1200
1700
200020
V TRIP LEVEL N
()
S5
20 K
Vx1
N
100 K
Vx5
N
ΩΩ
PULSE
ENABLE
LEAKAGE
CURRENT
OFF
Copyright © 2015 by Littelfuse Startco
All rights reserved.
Document Number: PM-1230-EN
Printed in Canada.

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NGRM-ENC Enclosed Neutral-Grounding-Resistor Monitor Rev. 0-B-030515
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Page ii
NGRM-ENC Enclosed Neutral-Grounding-Resistor Monitor Rev. 0-B-030515
TABLE OF CONTENTS
SECTION PAGE
1 General ................................................................. 1
1.1 SE-325 Models ..................................................... 1
1.2 SE-330 Models ..................................................... 1
2 Operation............................................................. 1
2.1 Indication, Metering, and Reset ............................ 1
2.2 Configuration and Settings ................................... 1
3 Installation........................................................... 2
3.1 Type 4X Enclosure ............................................... 2
3.2 Connections to the Neutral-Grounding-Resistor
and Current Transformer....................................... 2
3.2.1 SE-325 Models .......................................... 2
3.2.2 SE-330 Models .......................................... 2
3.3 Supply Voltage Connection .................................. 2
3.3.1 Supply by Field Connection ...................... 2
3.3.2 Control Power Transformer (CPT)
Models .................................................................. 2
3.4 Phase-Voltage Indication ...................................... 2
3.5 Relay-Output Connections.................................... 2
3.6 Network-Communications Connections ............... 2
3.7 Dielectric-Strength Testing................................... 2
4 Technical Specifications ................................... 15
5 Ordering Information....................................... 16
6 Warranty ........................................................... 16
Appendix A NGRM-ENC Revision History .............. 17
LIST OF FIGURES
FIGURE PAGE
1 NGRM-ENC Outline and Mounting Details......... 3
2 SE-325 Typical Wiring Diagram........................... 4
3 SE-330 Typical Wiring Diagram........................... 5
4 SE-325 Model (NGRM-ENC-100-01)
Interior/Exterior Details .......................................... 6
5 SE-325 Model (NGRM-ENC-100-01)
Interior Details........................................................ 7
6 SE-325 Model (NGRM-ENC-XX0-XX)
Wiring Label .......................................................... 8
7 SE-330 Surface-Mount Model
(NGRM-ENC-XX0-21) Interior/Exterior Details .... 9
8 SE-330 Surface-Mount Model
(NGRM-ENC-XX0-X1) Interior Details............... 10
9 SE-330 Surface-Mount Model
(NGRM-ENC-XX0-XX) Wiring Label................. 11
10 SE-330 Panel-Mount Model
(NGRM-ENC-XX1-21) Interior/Exterior Details .. 12
11 SE-330 Panel-Mount Model
(NGRM-ENC-XX1-X1) Interior Details............... 13
12 SE-330 Panel-Mount Model
(NGRM-ENC-XX1-XX) Wiring Label................. 14
DISCLAIMER
Specifications are subject to change without notice.
Littelfuse Startco is not liable for contingent or
consequential damages, or for expenses sustained as a
result of incorrect application, incorrect adjustment, or a
malfunction.

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NGRM-ENC Enclosed Neutral-Grounding-Resistor Monitor Rev. 0-B-030515
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Page 1
NGRM-ENC Enclosed Neutral-Grounding-Resistor Monitor Rev. 0-B-030515
1. GENERAL
The NGRM-ENC Enclosed Neutral-Grounding-
Resistor (NGR) Monitor series is a Type 4X enclosure
housing a Littelfuse Startco SE-325 or SE-330 Neutral-
Grounding-Resistor Monitor and optional accessories that
include a 480/600-V control power transformer (CPT),
faulted-phase indication (FPI; implemented with an
EL3100 Ground-Fault & Phase-Voltage Indicator), earth-
leakage panel meter, pulse-enable control, and mounting
options. Appropriate fusing is included and field wiring
is to terminal blocks.
This manual supplements the relevant NGR-monitor
and EL3100 manuals.
1.1 SE-325 MODELS
NGRM-ENC models with an SE-325 NGR Monitor
include a surface-mounted NGR monitor, panel-mounted
indication and reset and have a Type 4X rating. Options
include a CPT and FPI. See Figs. 4 and 5.
1.2 SE-330 MODELS
NGRM-ENC models with an SE-330 NGR Monitor
include a panel- or surface-mounted NGR monitor which
can be optionally equipped with a network-communications
interface. Panel-mounted models include an
SE-IP65CVR-G Hinged Transparent Cover and have an
IP65 rating. Surface-mounted models include panel-
mounted indication and reset, USB connector, and have a
Type 4X rating. Both mounting styles can optionally be
equipped with a CPT, FPI, earth-leakage panel meter, and
pulse-enable switch. See Figs. 7 and 10.
2. OPERATION
Refer to the SE-325, SE-330, and EL3100 manuals
included with the NGRM-ENC or at www.littelfuse.com/
relayscontrols, as required.
NOTE: For models equipped with an SE-330 NGR
Monitor and an optional pulse-enable switch, select Pulse
Enable to cause the SE-330 K1 contact to cycle at a rate
determined by the SE-330 front-panel Pulse Period
switch. Ensure that SE-330 configuration switch S1 is set
to K1=Pulse.
CAUTION: For models equipped with a CPT and/or FPI,
the maximum supply voltage is 600 Vac.
2.1 INDICATION, METERING, AND RESET
Surface-mount models include red panel-mounted
Ground Fault and Resistor Fault LED’s that indicate the
NGR-monitor trip state, and a green Control Power LED.
Reset latched trips by pressing the Reset button when the
trip condition is no longer present. NGR-monitor front-
panel indication and reset is accessible when the door
panel is open.
Panel-mounted SE-330 face-plate indication is visible
through the hinged transparent cover. Open the hinged
transparent cover to access the SE-330 Reset button.
Models equipped with earth-leakage metering
continuously display earth-leakage current as a
percentage of the ground-fault-CT-primary rating when
the SE-330 is energized.
All SE-330 models have a USB interface through
which NGR-resistance-change, neutral-voltage and
current metering is accessible with a PC running
SE-MON330 software that is available at Littelfuse.com.
This data is also accessible through the optional network-
communications interface.
2.2 CONFIGURATION AND SETTINGS
Factory configuration is per the SE-325 or SE-330
manual, except that SE-330 models equipped with a pulse-
enable switch have configuration switch S1 set to K1=Pulse.
Adjust settings as required – refer to the appropriate
manuals.

Page 2
NGRM-ENC Enclosed Neutral-Grounding-Resistor Monitor Rev. 0-B-030515
3. INSTALLATION
3.1 TYPE 4X ENCLOSURE
The 455 x 340 x 175 mm polyester enclosure has a
hinged front panel with dual lockable latches. For wall
mounting, attach the included mounting brackets to the
back of the enclosure with the enclosed fasteners, and
prepare the mounting surface using the dimensions as
shown in Fig. 1.
All models ship with no predrilled cable entry. An
appropriate hole or holes must be made in the enclosure
for the installation of all conductors. Space is allowed at
the bottom for cable entry. See Figs. 4, 7, and 10. Use
appropriate cable-entry fittings.
3.2 CONNECTIONS TO THE NEUTRAL-GROUNDING-
RESISTOR AND CURRENT TRANSFORMER
For all models, connect NGRM-ENC terminal R to an
ER-series sensing resistor(1) terminal R. Follow SE-325 or
SE-330 manual guidelines for wire size selection. See
Figs. 2 and 3. All models connect to a current
transformer(1), which measures NGR current. The
sensing resistor and CT are typically located in the NGR
enclosure.
3.2.1 SE-325 MODELS
Connect the CT200 current transformer(1) secondary to
NGRM-ENC terminals CT1 and CT2. Connections are
not polarity sensitive. Follow SE-325 manual guidelines
for wire size selection. See Fig. 2.
3.2.2 SE-330 MODELS
For sensitive EFCT- or SE-CS30-series current
sensors(1), connect to NGRM-ENC terminals S and C.
For 5-A-secondary CT’s connect to terminals 5 and C. A
field-wiring change is required for 1-A-secondary CT
connections. See Fig. 3. CT connections are not polarity
sensitive. Follow SE-330 manual guidelines for wire size
selection.
3.3 SUPPLY VOLTAGE CONNECTION
Appropriate supply-voltage fusing is provided for all
models. Connect terminal GND to system ground.
3.3.1 SUPPLY BY FIELD CONNECTION
For models requiring field-supply-voltage connections,
connect line and neutral to NGRM-ENC terminals L and
N. See Figs. 2 and 3. SE-325 and SE-330 models require
a 120-Vac supply. Consult the appropriate product
manual for power requirements.
3.3.2 CONTROL POWER TRANSFORMER (CPT)
MODELS
Models equipped with a CPT are compatible with
480- and 600-V systems, and are factory-connected for a
600-V system. Field adjustment for a 480-V system is
required by moving the T1H3 connection on T1 to the H2
terminal of T1. Connect NGRM-ENC terminals ØA and
ØB to the 480- or 600-V bus using 14 to 6 AWG (2.08 to
13.3 mm2) wire. See Figs. 2 and 3.
3.4 PHASE-VOLTAGE INDICATION
For models equipped with phase-voltage and faulted-
phase indication, connect NGRM-ENC terminals ØA,
ØB, and ØC to the 480- or 600-V bus using 14 to 6 AWG
(2.08 to 13.3 mm2). See Figs. 2 and 3. These terminals
are shared by the CPT connections for models so
equipped.
3.5 RELAY-OUTPUT CONNECTIONS
For external alarm or trip indication and protection,
connect to SE-325 A-B relay output or SE-330 K1
relay output by connecting to NGRM-ENC terminals
301 and 302. A field-wiring change is required if a
supply-voltage connection is required to the relay
output(s) within the NGRM-ENC. Field wiring is
required if connection to SE-330 relay outputs K2, K3,
and K4 is required. See Figs. 2 and 3 and the
appropriate product manual.
NOTE:The SE-330 surface-mount options use relays K2
and K3 for panel-mounted ground-fault and resistor-fault
indication respectively.
3.6 NETWORK-COMMUNICATIONS CONNECTIONS
For SE-330 models equipped with a communications
option, connect directly to the SE-330 network
interface, referring to the appropriate product manual.
3.7 DIELECTRIC-STRENGTH TESTING
Remove the connections at the SE-325 and SE-330
L1 and L2 terminals, and remove the connection to the
EL3100 terminal 19 (if installed), before performing
dielectric-strength testing.
Ensure that all connections are reconnected and
securely fastened after any tests. See Figs. 2 and 3.
NOTES:
(1) Not included with the NGRM-ENC.

Page 3
NGRM-ENC Enclosed Neutral-Grounding-Resistor Monitor Rev. 0-B-030515
NOTES:
1. DIMENSIONS IN MILLIMETRES (INCHES).
2. PANEL-MOUNTED SE-330 MODEL SHOWN.
(16.00)
406.2
(10.40)
264.0
(17.87)
453.8
436.6
(17.19)
(13.00)
330.5
SIDE FRONT
REAR
(MOUNTING DETAIL)
NGRM-ENC
ON
PHASE
A
PHASE
B
PHASE
C
0.1
0.5 0.7 1.0
2.0
3.0
5.0
10.0
4
10
8
20 40
60
680
100
MEM2
1.0
1.2
1.4
1.6
1.8 2.0 2.2
2.4
2.6
2.8
3.0
SE-330NEUTRAL-GROUNDING-RESISTOR
MONITOR
0.2
0.3
0.4
CAL
RESET
GF TRIP TIME (s) PULSE PERIOD (s)
GF TRIP LEVEL
(% CT RATING)
LITTELFUSE STARTCO
TRIP
GROUND
FAULT
POWER
RELAYK1
DIAGNOSTIC
CALIBRATED
TRIP
RESISTOR
FAULT
60
170
130
200 340
800
100 120 0
1700
200020
V TRIP LEVEL N
()
S5
20 K
Vx1
N
100 K
Vx5
N
ΩΩ
PULSE
ENABLE
LEAKAGE
CURRENT
OFF
FIGURE 1. NGRM-ENC Outline and Mounting Details.

Page 4
NGRM-ENC Enclosed Neutral-Grounding-Resistor Monitor Rev. 0-B-030515
*EL3100
AH
BH
CH
G
DC 10
DB 11
DA 12
DN 15
DS4
GRN
DS3
GRN
DS2
GRN
401
402
403
404
SE-325
SW GI
306
303
305
304
+RI R G
R
PB1
RESET
LT3
RESISTOR FAULT
X1 X2
RED
LT2
GROUND FAULT
X1 X2
RED
SE-325 FACTORY SETTINGS
GF TRIPTIME: 0.1 SEC
GF TRIP LEVEL: 0.5 A
MODE: UV
RESISTOR: 20K
RESISTOR TRIP LEVEL: 20
ADJUST AS REQUIRED.
SHLD
CT2
CT1
CT1 CT2 ABL1
L2
CT1
CT2
WHT
BLK
301 302
LT1
CONTROL POWER
X1 X2
GRN
N
R
L
F1
0.8 A
X1
X3 X2
X4
H1
120V 120V
H2 H3
480V
*T1
600/480 120/240 150 VA
T1H1
T1H2 T1H3
T1X1
NL
*F2
0.5 A
*F3
0.5 A
*F4
0.5 A
ØA ØB ØC
T1X2
K1
1
3
5
19
600V
OPTIONAL
INCOMING 120V
BY CUSTOMER
OPTIONAL INCOMING
480V/600V
BY CUSTOMER
GND
NOTES:
1. RELAY CONTACTS SHOWN WITH
SE-325 DE-ENERGIZED.
2. DESIGNATORS WITH LEADING “*” ARE
OPTIONAL.
*PHASE A
*PHASE B
*PHASE C
FIGURE 2. SE-325 Typical Wiring Diagram.

Page 5
NGRM-ENC Enclosed Neutral-Grounding-Resistor Monitor Rev. 0-B-030515
L1
+
891011
S15C
1
22
26
29
12
14
15
16
17
3
4
5
REMOTE
RESET
PULSE
ENABLE
SE-330
SPGA
SPG
PULSE ENABLE
RESET
NC
K4
RF
K3
GF
K2
K1
R
G
L2/N
+24V
-
0V
6
7
2
23
24
25
27
28
13
18
19
20
21
LT3
RESISTOR FAULT
IDC
305
306
307
SE-330 FACTORY SETTINGS
GF TRIPTIME: 0.5 SEC
GF TRIP LEVEL: 20%
VNTRIP LEVEL: 60 V
ADJUST AS REQUIRED.
K2 MODE: NON-FAIL-SAFE
K3 MODE: NON-FAIL-SAFE
308
309
+
-
X1
304 X2
RED
LT2
GROUND FAULT
X1
303 X2
RED
302
301
LT1
CONTROL POWER
X1 X2
GRN
5
S
C
SHLD
R
N
L
F1
0.8 A
T1X2
*EL3100
*T1
600/480 120/240 150 VA
*F2
0.5 A
*F3
0.5 A
*F4
0.5 A
NL
OPTIONAL
INCOMING 120V
BY CUSTOMER
OPTIONAL INCOMING
480V/600V
BY CUSTOMER
AH
1
BH
3
CH
5
G
19
DC 10
DB 11
DA 12
DN 15
DS4
GRN
RED
WHT
BLK
DS3
GRN
DS2 GRN
401
402
403
404
RED
WHT
BLK
ØA ØB ØC
PB1
RESET DS1
C
S
5
X1
X3 X2
X4
H1
120V 120V
H2 H3
480V
T1H1
T1H2 T1H3
T1X1
600V
GND
*PHASE A
*PHASE B
*PHASE C
(OPTIONAL)
NOTE 1
NOTE 1
NOTE 1
NOTE 1
EARTH-LEAKAGE
CURRENT (OPTIONAL)
NOTES:
1. SURFACE-MOUNT MODELS ONLY.
2. RELAY CONTACTS SHOWN WITH
SE-330 DE-ENERGIZED.
3. DESIGNATORS WITH LEADING “*” ARE
OPTIONAL.
FIGURE 3. SE-330 Typical Wiring Diagram.

Page 6
NGRM-ENC Enclosed Neutral-Grounding-Resistor Monitor Rev. 0-B-030515
NOTE:
1. SHOWN WITH ALL OPTIONS AVAILABLE.
SIDE
INTERIOR
FRONT
NGRM-ENC
CONTROL
POWER
GROUND
FAULT
RESISTOR
FAULT
RESET
PHASE
A
PHASE
B
PHASE
C
F1
RESETGROUND
FAULT
GF TRIP
TIME (s)
RESISTOR
FAULT
RES TRIP
LEVEL (VAC)
CT1 CT2 ABL1L2
MODE RESGF 20 400
200
0.1 2.0
1.0
4.0 A
2.0 A
0.5 A
SH
UV 20K
POWER
RGRIGISW
NGR MONITOR
SE-325
DISPLAY
208/240
EL3100 SERIES
A
FAULT
SH
480/600
AH BH CH AL BL CL
DN
DR DG DA DB DC
19 1718 16 15 1314 12 11 10
126
45
39
8
7
C
B
G
GROUND-FAULT & PHASE-VOLTAGE INDICATOR
GND
GND
GND
CT2
CT1
SHLD
R
ØA(F2)
0.5 A
600V
ØB(F3)
0.5 A
600V
301
302
L(F1)
0.8 A
600V
ØC(F4)
0.5 A
600V
T1
150 VA
OPTIONAL INCOMING
120VAC BY CUSTOMER
*T1X2
*T1X1
TB1
GND BLOCK
CTM
SE-325
GND BLOCK
TB1 T1X2
T1X1
F1
T1H1
T1H2
T1H3
F2
F3
F3
*NOTE 1
*T1
150VA
SE-325(G)
*EL3100(19)
SE-325(CT1)
SE-325(GND)
TB1
*T1X2
*DS4
*DS3
*DS2
401
402
403
404
*DS2
10
11
12
13
14
15
16
17
18
19
9
8
7
6
5
4
3
2
1
*F4
*F3
*F2
GND BLOCK
*EL3100
LSE-325(L1)
LT1(X1)
L
L
N
N
SE-325(L2)
OPTIONAL INCOMING
480 / 600V BY CUSTOMER
F1 - 0.8 A
*F2 - 0.5 A
*F3 - 0.5 A
*F4 - 0.5 A
*T1H3
*T1H1 *EL3100(1)
*EL3100(3)
*EL3100(5)
ØA
ØB
ØC
GND
GND
GND
GRN GND BLOCK
SE-325(A)
SE-325(B)
SE-325(CT2)
SE-325(CT1)
SE-325(R)
BLK
WHT
301
302
CTM
CT2
CT1
SHLD
R
TB1
SE-325
TRIP
NGR
ENCLOSURE
DOOR WIRING
(REAR VIEW)
*EL3100(12) *EL3100(11) *EL3100(10)
403
401 402
*DS2
*DS4 *DS3
404 *EL3100(15)
TB1
TB1
SHLD
BLK
WHT
301 302
L N
GND BLOCK
CT2 CT1
B
A
L2 L1
GI
5W
RI
+
GND
G
R
306 303 305 304
R
TB1
LT2 LT3
GND BLOCK
PB1
SE-325(+) 305
PB1
RESET
LT2
GROUND
FAULT
LT3
RESISTOR
FAULT
SE-325(GI)
SE-325(RI)
SE-325(SW)
304
306
303
X1
X1 X2
X2
RED
RED
TB1
LT1
CONTROL
POWER
TB1
NL
X2 X1
GRN
NOTES:
1.T1 IS SET FOR 600V INCOMING. FOR 480V
INCOMING, MOVE F3-TO-T1 CONNECTION
FROM T1H3 TO T1H2.
2.DESIGNATORS WITH LEADING “*” ARE
OPTIONAL.
3.MINIMUM SUPPLY CONDUCTOR RATING
90ºC.
4.DASHED LINES INDICATE FIELD WIRING.
0.8 A, 600 VAC
LITTELFUSE KLDR.800TXP
RATING
0.5 A, 600 VAC
LITTELFUSE KLK.500
FUSE
F2, F3, F4
F1
GND BLOCK
LT1(X2)
FIGURE 4. SE-325 Model (NGRM-ENC-100-01) Interior/Exterior Details.

Page 7
NGRM-ENC Enclosed Neutral-Grounding-Resistor Monitor Rev. 0-B-030515
F1
RESETGROUND
FAULT
GF TRIP
TIME (s)
RESISTOR
FAULT
RES TRIP
LEVEL (VAC)
CT1 CT2 ABL1L2
MODE RESGF 20 400
200
0.1 2.0
1.0
4.0 A
2.0 A
0.5 A
SH
UV 20K
POWER
RGRIGISW
NGR MONITOR
SE-325
DISPLAY
208/240
EL3100 SERIES
A
FAULT
SH
480/600
AH BH CH AL BL CL
DN DR DG DA DB DC
19 1718 16 15 1314 12 11 10
126
45
39
8
7
C
B
G
GROUND-FAULT & PHASE-VOLTAGE INDICATOR
GND
GND
GND
CT2
CT1
SHLD
R
ØA(F2)
0.5 A
600V
ØB(F3)
0.5 A
600V
301
302
L(F1)
0.8 A
600V
ØC(F4)
0.5 A
600V
T1
150 VA
FIGURE 5. SE-325 Model (NGRM-ENC-100-01) Interior Details.

Page 8
NGRM-ENC Enclosed Neutral-Grounding-Resistor Monitor Rev. 0-B-030515
OPTIONAL INCOMING
120 VAC BY CUSTOMER
*T1X2
*T1X1
TB1
GND BLOCK
CTM
SE-325
GND BLOCK
TB1 T1X2
T1X1
F1
T1H1
T1H2
T1H3
F2
F3
F3
*NOTE 1
*T1
150 VA
SE-325(G)
*EL3100(19)
SE-325(CT1)
SE-325(GND)
TB1
*T1X2
*DS4
*DS3
*DS2
401
402
403
404
*DS2
10
11
12
13
14
15
16
17
18
19
9
8
7
6
5
4
3
2
1
*F4
*F3
*F2
GND BLOCK
*EL3100
LSE-325(L1)
LT1(X1)
LT1(X2)
L
L
N
N
SE-325(L2)
OPTIONAL INCOMING
480 / 600 V BY CUSTOMER
F1 - 0.8 A
*F2 - 0.5 A
*F3 - 0.5 A
*F4 - 0.5 A
*T1H3
*T1H1 *EL3100(1)
*EL3100(3)
*EL3100(5)
ØA
ØB
ØC
GND
GND
GND
GRN GND BLOCK
SE-325(A)
SE-325(B)
SE-325(CT2)
SE-325(CT1)
SE-325(R)
BLK
WHT
301
302
CTM
CT2
CT1
SHLD
R
TB1
SE-325
TRIP
NGR
ENCLOSURE
DOOR WIRING
(REAR VIEW)
*EL3100(12) *EL3100(11) *EL3100(10)
403
401 402
*DS2
*DS4
*DS3
404 *EL3100(15)
TB1
TB1
SHLD
BLK
WHT
301 302
L N
GND BLOCK
CT2 CT1
B
A
L2 L1
GI
5W
RI
+
GND
G
R
306
303
305
304
R
TB1
LT2 LT3
GND BLOCK
PB1
SE-325(+) 305
PB1
RESET
LT2
GROUND
FAULT
LT3
RESISTOR
FAULT
SE-325(GI)
SE-325(RI)
SE-325(SW)
304
306
303
X1
X1 X2
X2
RED
RED
TB1
LT1
CONTROL
POWER
TB1
NL
X2 X1
GRN
NOTES:
1.T1 IS SET FOR 600V INCOMING. FOR 480V
INCOMING, MOVE F3-TO-T1 CONNECTION
FROM T1H3 TO T1H2.
2.DESIGNATORS WITH LEADING “*” ARE
OPTIONAL.
3.MINIMUM SUPPLY CONDUCTOR RATING
90ºC.
4.DASHED LINES INDICATE FIELD WIRING.
0.8 A, 600 VAC
LITTELFUSE KLDR.800TXP
RATING
0.5 A, 600 VAC
LITTELFUSE KLK.500
FUSE
F2, F3, F4
F1
GND BLOCK
FIGURE 6. SE-325 Model (NGRM-ENC-XX0-XX) Wiring Label.

Page 9
NGRM-ENC Enclosed Neutral-Grounding-Resistor Monitor Rev. 0-B-030515
NOTE:
1. SHOWN WITH ALL OPTIONS AVAILABLE.
SIDE
INTERIOR
FRONT
DISPLAY
208/240
EL3100 SERIES
A
FAULT
SH
480/600
AH BH CH AL BL CL
DN
DR DG DA DB DC
19 1718 16 15 1314 12 11 10
126
45
39
8
7
C
B
G
GROUND-FAULT & PHASE-VOLTAGE INDICATOR
NGRM-ENC
CONTROL
POWER
GROUND
FAULT
RESISTOR
FAULT
RESET
USB
PHASE
A
PHASE
B
PHASE
C
ON
PULSE
ENABLE
LEAKAGE
CURRENT
OFF
0.1
0.5 0.7 1.0
2.0
3.0
5.0
10.0
4
10
8
20 40
60
680
100
MEM2
1.0
1.2
1.4
1.6
1.8 2.0 2.2
2.4
2.6
2.8
3.0
SE-330NEUTRAL-GROUNDING-RESISTOR
MONITOR
0.2
0.3
0.4
CAL
RESET
GF TRIP TIME (s) PULSE PERIO D (s)
GF TRIP LEVEL
(% CT RATING)
LITTELFUSE STARTCO
TRIP
GROUND
FAULT
POWER
RELAYK1
DIAGNOSTIC
CALIBRATED
TRIP
RESISTOR
FAULT
60
170
130
200 340
800
100 120 0
1700
200020
V TRIPLEVEL N
()
S5
20 K
Vx1
N
100 K
Vx5
N
ΩΩ
GND
GND
GND
5
S
C
SHLD
R
ØA(F2)
0.5 A
600V
ØB(F3)
0.5 A
600V
301
302
L(F1)
0.8 A
600V
ØC(F4)
0.5 A
600V
T1
150 VA
OPTIONAL INCOMING
120VAC BY CUSTOMER
*T1X2
*T1X1
0.8 A, 600 VAC
LITTELFUSE KLDR.800TXP
RATING
0.5 A, 600 VAC
LITTELFUSE KLK.500
FUSE
F2, F3, F4
F1
SHLD
GND
305
306
307
12
13
14
15
16
17
18
19
20
21
PB1
*S1
*DS1(+)
*DS1(-)
308
309
301
302
TB1 22
23
28
29
1
2
3
4
5
TB1
L
N
GND GND BLOCK
6
7
R
BLK
TB1
GND BLOCK
8
9
10
11
WHT
RED
CTM
TB1
GRN GND BLOCK
SE-330
GND BLOCK
TB2 T1X2
T1X1
F1
T1H1
T1H2
T1H3
F2
F3
F3
*NOTE 1
*T1
150VA
*DS4
*DS3
*DS2
401
402
403
404
*DS2
10
11
12
13
14
15
16
17
18
19
9
8
7
6
5
4
3
2
1
*F4
*F3
*F2
GND BLOCK
*EL3100
SE-330(29)
SE-330(26)
SE-330(1)
LT1(X1) L
L
L
N
N
SE-330(2)
LT1(X2)
OPTIONAL INCOMING
480 / 600V BY CUSTOMER
F1 - 0.8 A
*F2 - 0.5 A
*F3 - 0.5 A
*F4 - 0.5 A
*T1H3
*T1H1 *EL3100(1)
*EL3100(3)
*EL3100(5)
ØA
ØB
ØC
GND
GND
GND
GRN GND BLOCK
SE-330(22)
SE-330(23)
SE-330(10)
SE-330(8)
SE-330(11)
SE-330(6)
BLK
WHT
RED
301
302
CTM
5
S
C
SHLD
R
TB1
SE-330
TRIP
NGR
ENCLOSURE
NOTES:
1.T1 IS SET FOR 600V INCOMING. FOR 480V
INCOMING, MOVE F3-TO-T1 CONNECTION
FROM T1H3 TO T1H2.
2.DESIGNATORS WITH LEADING “*” ARE
OPTIONAL.
3.MINIMUM SUPPLY CONDUCTOR RATING
90ºC.
4.DASHED LINES INDICATE FIELD WIRING.
DOOR WIRING (REAR VIEW)
24
25
26
27
TB1
TB1
LT2
LT3
303
304
L
L
*EL3100(12) *EL3100(11) *EL3100(10)
403
401 402
*DS2
*DS4 *DS3
404 *EL3100(15)
SE-330(17) SE-330(16)
SE-330(20) SE-330(21)
*DS1
308 309
+-
Idc
307 306
*S1
PULSE
SE-330(15) 305
PB1
RESET
TB1
LT1
CONTROL
POWER
LT2
GROUND
FAULT
LT3
RESISTOR
FAULT
TB1
SE-330(24)
SE-330(27)
303
304
NL
N
X2
X2
X2
X1
X1
X1
GRN
RED
RED
GND BLOCK
*T1X2
TB1
*EL3100(19)
SE-330(7)
SE-330(3)
SE-330(11)
FIGURE 7. SE-330 Surface-Mount Model (NGRM-ENC-XX0-21) Interior/Exterior Details.

Page 10
NGRM-ENC Enclosed Neutral-Grounding-Resistor Monitor Rev. 0-B-030515
T1
150 VA
DISPLAY
208/240
EL3100 SERIES
A
FAULT
SH
480/600
AH BH CH AL BL CL
DN
DR DG DA DB DC
19 1718 16 15 1314 12 11 10
126
45
39
8
7
C
B
G
GROUND-FAULT & PHASE-VOLTAGE INDICATOR
GND
GND
GND
5
S
C
SHLD
R
ØA(F2)
0.5 A
600V
ØB(F3)
0.5 A
600V
301
302
L(F1)
0.8 A
600V
ØC(F4)
0.5 A
600V
0.1
0.5 0.7 1.0
2.0
3.0
5.0
10.0
4
10
8
20 40
60
680
100
MEM2
1.0
1.2
1.4
1.6
1.8 2.0 2.2
2.4
2.6
2.8
3.0
SE-330NEUTRAL-GROUNDING-RESISTOR
MONITOR
0.2
0.3
0.4
CAL
RESET
GF TRIP TIME (s) PULSE PERIOD (s)
GF TRIP LEVEL
(% CT RATING)
LITTELFUSE STARTCO
TRIP
GROUND
FAULT
POWER
RELAY K1
DIAGNOSTIC
CALIBRATED
TRIP
RESISTOR
FAULT
60
170
130
200 340
800
100 1200
1700
200020
V TRIP LEVEL N
()
S5
20 K
Vx1
N
100 K
Vx5
N
ΩΩ
FIGURE 8. SE-330 Surface-Mount Model (NGRM-ENC-XX0-X1) Interior Details.

Page 11
NGRM-ENC Enclosed Neutral-Grounding-Resistor Monitor Rev. 0-B-030515
OPTIONAL INCOMING
120 VAC BY CUSTOMER
*T1X2
*T1X1
0.8 A, 600 VAC
LITTELFUSE KLDR.800TXP
RATING
0.5 A, 600 VAC
LITTELFUSE KLK.500
FUSE
F2, F3, F4
F1
SHLD
GND
305
306
307
12
13
14
15
16
17
18
19
20
21
PB1
*S1
*DS1(+)
*DS1(-)
308
309
301
302
TB1 22
23
28
29
1
2
3
4
5
TB1
L
N
GND GND BLOCK
6
7
R
BLK
TB1
GND BLOCK
8
9
10
11
WHT
RED
CTM
TB1
GRN GND BLOCK
SE-330
GND BLOCK
TB2 T1X2
T1X1
F1
T1H1
T1H2
T1H3
F2
F3
F3
*NOTE 1
*T1
150 VA
*DS4
*DS3
*DS2
401
402
403
404
*DS2
10
11
12
13
14
15
16
17
18
19
9
8
7
6
5
4
3
2
1
*F4
*F3
*F2
GND BLOCK
*EL3100
SE-330(29)
SE-330(26)SE-330(1)
LT1(X1) L
L
L
N
N
SE-330(2)
OPTIONAL INCOMING
480 / 600 V BY CUSTOMER
F1 - 0.8 A
*F2 - 0.5 A
*F3 - 0.5 A
*F4 - 0.5 A
*T1H3
*T1H1 *EL3100(1)
*EL3100(3)
*EL3100(5)
ØA
ØB
ØC
GND
GND
GND
GRN GND BLOCK
SE-330(22)
SE-330(23)
SE-330(10)
SE-330(8)
SE-330(11)
SE-330(6)
BLK
WHT
RED
301
302
CTM
5
S
C
SHLD
R
TB1
SE-330
TRIP
NGR
ENCLOSURE
NOTES:
1.T1 IS SET FOR 600V INCOMING. FOR 480V
INCOMING, MOVE F3-TO-T1 CONNECTION
FROM T1H3 TO T1H2.
2.DESIGNATORS WITH LEADING “*” ARE
OPTIONAL.
3.MINIMUM SUPPLY CONDUCTOR RATING
90ºC.
4.DASHED LINES INDICATE FIELD WIRING.
DOOR WIRING (REAR VIEW)
24
25
26
27
TB1
TB1
LT2
LT3
303
304
L
L
*EL3100(12) *EL3100(11) *EL3100(10)
403
401 402
*DS2
*DS4 *DS3
404 *EL3100(15)
SE-330(17) SE-330(16)
SE-330(20) SE-330(21)
*DS1
308 309
+-
Idc
307 306
*S1
PULSE
SE-330(15) 305
PB1
RESET
TB1
LT1
CONTROL
POWER
LT2
GROUND
FAULT
LT3
RESISTOR
FAULT
TB1
SE-330(24)
SE-330(27)
303
304
NL
N
X2
X2
X2
X1
X1
X1
GRN
RED
RED
GND BLOCK
*T1X2
TB1
*EL3100(19)
SE-330(7)
SE-330(3)
SE-330(11)
LT1(X2)
FIGURE 9. SE-330 Surface-Mount Model (NGRM-ENC-XX0-XX) Wiring Label.

Page 12
NGRM-ENC Enclosed Neutral-Grounding-Resistor Monitor Rev. 0-B-030515
NOTE:
1. SHOWN WITH ALL OPTIONS AVAILABLE.
SIDE
INTERIOR
FRONT
NGRM-ENC
ON
PHASE
A
PHASE
B
PHASE
C
0.1
0.5 0.7 1.0
2.0
3.0
5.0
10.0
4
10
8
20 40
60
680
100
MEM2
1.0
1.2
1.4
1.6
1.8 2.0 2.2
2.4
2.6
2.8
3.0
SE-330NEUTRAL-GROUNDING-RESISTOR
MONITOR
0.2
0.3
0.4
CAL
RESET
GF TRIP TIME (s) PULSE PERIOD (s)
GF TRIP LEVEL
(% CT RATING)
LITTELFUSE STARTCO
TRIP
GROUND
FAULT
POWER
RELAYK1
DIAGNOSTIC
CALIBRATED
TRIP
RESISTOR
FAULT
60
170
130
200 340
800
100 120 0
1700
200020
V TRIP LEVEL N
()
S5
20 K
Vx1
N
100 K
Vx5
N
ΩΩ
PULSE
ENABLE
LEAKAGE
CURRENT
OFF
DISPLAY
208/240
EL3100 SERIES
A
FAULT
SH
480/600
AH BH CH AL BL CL
DN
DR DG DA DB DC
19 1718 16 15 1314 12 11 10
126
45
39
8
7
C
B
G
GROUND-FAULT & PHASE-VOLTAGE INDICATOR
GND
GND
GND
5
S
C
SHLD
R
ØA(F2)
0.5 A
600V
ØB(F3)
0.5 A
600V
301
302
L(F1)
0.8 A
600V
ØC(F4)
0.5 A
600V
T1
150 VA
OPTIONAL INCOMING
OPTIONAL INCOMING
120VAC BY CUSTOMER
120VAC BY CUSTOMER
SHLD
SHLD
GND
GND
306
306
307
307
12
12
13
13
14
14
15
15
16
16
17
17
18
18
19
19
20
20
21
21
*S1
*S1
*DS1(+)
*DS1(+)
*DS1(-)
*DS1(-)
308
308
309
309
301
301
302
302
TB1
TB1
22
22
23
23
24
24
25
25
26
26
27
27
28
28
29
29
1
2
3
4
5
TB1
TB1
L
N
GND
GND
GND BLOCK
GND BLOCK
6
7
R
BLK
BLK
TB1
TB1
GND BLOCK
GND BLOCK
8
9
10
10
11
11
WHT
WHT
RED
RED
CTM
CTM
TB1
TB1
GRN
GRN
GND BLOCK
GND BLOCK
SE-330
SE-330
GND BLOCK
GND BLOCK
TB2
TB2
T1X2
T1X2
T1X1
T1X1
F1
F1
T1H1
T1H1
T1H2
T1H2
T1H3
T1H3
F2
F2
F3
F3
*NOTE 1
*NOTE 1
*T1
*T1
150VA
150VA
GND BLOCK
GND BLOCK
*T1X2
*T1X2
TB1
TB1
*EL3100(19)
*EL3100(19)
SE-330(7)
SE-330(7)
SE-330(3)
SE-330(3)
SE-330(11)
SE-330(11)
*DS4
*DS4
*DS3
*DS3
*DS2
*DS2
401
401
402
402
403
403
404
404
*DS2
*DS2
10
10
11
11
12
12
13
13
14
14
15
15
16
16
17
17
18
18
19
19
9
8
7
6
5
4
3
2
1
*F4
*F4
*F3
*F3
*F2
*F2
GND BLOCK
GND BLOCK
*EL3100
*EL3100
SE-330(1)
SE-330(1)
L
L
L
N
N
SE-330(2)
SE-330(2)
OPTIONAL INCOMING
OPTIONAL INCOMING
480 / 600V BY CUSTOMER
480 / 60 0 V BY CUSTOMER
F1 - 0.8 A
F1 - 0.8 A
*F2 - 0.5 A
*F2 - 0.5 A
*F3 - 0.5 A
*F3 - 0.5 A
*F4 - 0.5 A
*F4 - 0.5 A
*T1H3
*T1H3
*T1H1
*T1H1
*EL3100(1)
*EL3100(1)
*EL3100(3)
*EL3100(3)
*EL3100(5)
*EL3100(5)
ØA
ØA
ØB
ØB
ØC
ØC
GND
GND
GND
GND
GND
GND
GRN
GRN
GND BLOCK
GND BLOCK
SE-330(22)
SE-330(22)
SE-330(23)
SE-330(23)
SE-330(10)
SE-330(10)
SE-330(8)
SE-330(8)
SE-330(11)
SE-330(11)
SE-330(6)
SE-330(6)
BLK
BLK
WHT
WHT
RED
RED
301
301
302
302
CTM
CTM
5
S
C
SHLD
SHLD
R
TB1
TB1
SE-330
SE-330
TRIP
TRIP
NGR
NGR
ENCLOSURE
ENCLOSURE
DOOR WIRING
DOOR WIRING
(REAR VIEW)
(REAR VIEW)
*EL3100(12)
*EL3100(12)
*EL3100(11)
*EL3100(11)
*EL3100(10)
*EL3100(10)
403
403
401
401
402
402
*DS2
*DS2
*DS4
*DS4
*DS3
*DS3
404
404
*EL3100(15)
*EL3100(15)
SE-330(20)
SE-330(20)
SE-330(17)
SE-330(17)
SE-330(21)
SE-330(21)
SE-330(16)
SE-330(16)
*DS1
*DS1
308
308
309
309
+ -
Idc
Idc
307
307
306
306
*S1
*S1
PULSE
PULSE
NOTES:
NOTES:
1.T1 IS SET FOR 600V INCOMING. FOR 480V
1.T1 IS SET FOR 600V INCOMING. FOR 480V
INCOMING, MOVE F3-TO-T1 CONNECTION
INCOMING, MOVE F3-TO-T1 CONNECTION
FROM T1H3 TO T1H2.
FROM T1H3 TO T1H2.
2.DESIGNATORS WITH LEADING “*” ARE
2.DESIGNATORS WITH LEADING “*” ARE
OPTIONAL.
OPTIONAL.
3.MINIMUM SUPPLY CONDUCTOR RATING
3.MINIMUM SUPPLY CONDUCTOR RATING
90ºC.
90ºC.
4.DASHED LINES INDICATE FIELD WIRING.
4.DASHED LINES INDICATE FIELD WIRING.
F3
F3
0.8 A, 600 VAC
0.8 A, 600 VAC
LITTELFUSE KLDR.800TXP
LITTELFUSE KLDR.800TXP
RATING
RATING
0.5 A, 600 VAC
0.5 A, 600 VAC
LITTELFUSE KLK.500
LITTELFUSE KLK.500
FUSE
FUSE
F2, F3, F4
F2, F3, F4
F1
F1
*T1X2
*T1X2
*T1X1
*T1X1
FIGURE 10. SE-330 Panel-Mount Model (NGRM-ENC-XX1-21) Interior/Exterior Details.

Page 13
NGRM-ENC Enclosed Neutral-Grounding-Resistor Monitor Rev. 0-B-030515
DISPLAY
208/240
EL3100 SERIES
A
FAULT
SH
480/600
AH BH CH AL BL CL
DN
DR DG DA DB DC
19 1718 16 15 1314 12 11 10
126
45
39
8
7
C
B
G
GROUND-FAULT & PHASE-VOLTAGE INDICATOR
GND
GND
GND
5
S
C
SHLD
R
ØA(F2)
0.5 A
600V
ØB(F3)
0.5 A
600V
301
302
L(F1)
0.8 A
600V
ØC(F4)
0.5 A
600V
T1
150 VA
OPTIONAL INCOMING
120 VAC BY CUSTOMER
SHLD
GND
306
307
12
13
14
15
16
17
18
19
20
21
*S1
*DS1(+)
*DS1(-)
308
309
301
302 TB1
22
23
24
25
26
27
28
29
1
2
3
4
5
TB1
L
N
GND
GND BLOCK
6
7
R
BLK
TB1
GND BLOCK
8
9
10
11
WHT
RED
CTM
TB1
GRN
GND BLOCK
SE-330
GND BLOCK
TB2 T1X2
T1X1
F1
T1H1
T1H2
T1H3
F2
F3 *NOTE 1
*T1
150 VA
GND BLOCK
*T1X2
TB1
*EL3100(19)
SE-330(7)
SE-330(3)
SE-330(11)
*DS4
*DS3
*DS2
401
402
403
404
*DS2
10
11
12
13
14
15
16
17
18
19
9
8
7
6
5
4
3
2
1
*F4
*F3
*F2
GND BLOCK
*EL3100
SE-330(1)
L
L
L
N
N
SE-330(2)
OPTIONAL INCOMING
480 / 600 V BY CUSTOMER
F1 - 0.8 A
*F2 - 0.5 A
*F3 - 0.5 A
*F4 - 0.5 A
*T1H3
*T1H1 *EL3100(1)
*EL3100(3)
*EL3100(5)
ØA
ØB
ØC
GND
GND
GND
GRN GND BLOCK
SE-330(22)
SE-330(23)
SE-330(10)
SE-330(8)
SE-330(11)
SE-330(6)
BLK
WHT
RED
301
302
CTM
5
S
C
SHLD
R
TB1
SE-330
TRIP
NGR
ENCLOSURE
DOOR WIRING
(REAR VIEW)
*EL3100(12) *EL3100(11) *EL3100(10)
403
401 402
*DS2
*DS4 *DS3
404 *EL3100(15)
SE-330(20)
SE-330(17)
SE-330(21)
SE-330(16)
*DS1
308 309
+-
Idc
307 306
*S1
PULSE
NOTES:
1.T1 IS SET FOR 600V INCOMING. FOR 480V
INCOMING, MOVE F3-TO-T1 CONNECTION
FROM T1H3 TO T1H2.
2.DESIGNATORS WITH LEADING “*” ARE
OPTIONAL.
3.MINIMUM SUPPLY CONDUCTOR RATING
90ºC.
4.DASHED LINES INDICATE FIELD WIRING.
F3
0.8 A, 600 VAC
LITTELFUSE KLDR.800TXP
RATING
0.5 A, 600 VAC
LITTELFUSE KLK.500
FUSE
F2, F3, F4
F1
*T1X2
*T1X1
LT1(X1)
FIGURE 11. SE-330 Panel-Mount Model (NGRM-ENC-XX1-X1) Interior Details.

Page 14
NGRM-ENC Enclosed Neutral-Grounding-Resistor Monitor Rev. 0-B-030515
OPTIONAL INCOMING
120 VAC BY CUSTOMER
SHLD
GND
306
307
12
13
14
15
16
17
18
19
20
21
*S1
*DS1(+)
*DS1(-)
308
309
301
302 TB1
22
23
24
25
26
27
28
29
1
2
3
4
5
TB1
L
N
GND
GND BLOCK
6
7
R
BLK
TB1
GND BLOCK
8
9
10
11
WHT
RED
CTM
TB1
GRN
GND BLOCK
SE-330
GND BLOCK
TB2 T1X2
T1X1
F1
T1H1
T1H2
T1H3
F2
F3 *NOTE 1
*T1
150 VA
GND BLOCK
*T1X2
TB1
*EL3100(19)
SE-330(7)
SE-330(3)
SE-330(11)
*DS4
*DS3
*DS2
401
402
403
404
*DS2
10
11
12
13
14
15
16
17
18
19
9
8
7
6
5
4
3
2
1
*F4
*F3
*F2
GND BLOCK
*EL3100
SE-330(1)
LT1(X1) L
L
L
N
N
SE-330(2)
OPTIONAL INCOMING
480 / 600 V BY CUSTOMER
F1 - 0.8 A
*F2 - 0.5 A
*F3 - 0.5 A
*F4 - 0.5 A
*T1H3
*T1H1 *EL3100(1)
*EL3100(3)
*EL3100(5)
ØA
ØB
ØC
GND
GND
GND
GRN GND BLOCK
SE-330(22)
SE-330(23)
SE-330(10)
SE-330(8)
SE-330(11)
SE-330(6)
BLK
WHT
RED
301
302
CTM
5
S
C
SHLD
R
TB1
SE-330
TRIP
NGR
ENCLOSURE
DOOR WIRING
(REAR VIEW)
*EL3100(12) *EL3100(11) *EL3100(10)
403
401 402
*DS2
*DS4 *DS3
404 *EL3100(15)
SE-330(20)
SE-330(17)
SE-330(21)
SE-330(16)
*DS1
308 309
+ -
Idc
307 306
*S1
PULSE
NOTES:
1.T1 IS SET FOR 600V INCOMING. FOR 480V
INCOMING, MOVE F3-TO-T1 CONNECTION
FROM T1H3 TO T1H2.
2.DESIGNATORS WITH LEADING “*” ARE
OPTIONAL.
3.MINIMUM SUPPLY CONDUCTOR RATING
90ºC.
4.DASHED LINES INDICATE FIELD WIRING.
F3
0.8 A, 600 VAC
LITTELFUSE KLDR.800TXP
RATING
0.5 A, 600 VAC
LITTELFUSE KLK.500
FUSE
F2, F3, F4
F1
*T1X2
*T1X1
FIGURE 12. SE-330 Panel-Mount Model (NGRM-ENC-XX1-XX) Wiring Label.

Page 15
NGRM-ENC Enclosed Neutral-Grounding-Resistor Monitor Rev. 0-B-030515
4. TECHNICAL SPECIFICATIONS
Supply:
NGRM-ENC-000-00 ............12 VA, 120 Vac
(+10, -45%), 60 Hz
NGRM-ENC-100-00
EL3100 ...............................2 mA, 480/600 Vac,
60 Hz,
3-phase, 3-wire (no
neutral)
Monitor ...............................12 VA, 120 Vac
(+10, -45%), 60 Hz
NGRM-ENC-000-01,
NGRM-ENC-100-01 ............14 VA, 480/600 Vac,
60 Hz,
3-phase, 3-wire (no
neutral)
NGRM-ENC-2XX-X0,
NGRM-ENC-4XX-X0,
NGRM-ENC-6XX-X0,
NGRM-ENC-8XX-X0..........32 VA, 120 Vac
(+10, -45%), 60 Hz
NGRM-ENC-3XX-X0,
NGRM-ENC-5XX-X0,
NGRM-ENC-7XX-X0,
NGRM-ENC-9XX-X0
EL3100 ...............................2 mA, 480/600 Vac,
60 Hz,
3-phase, 3-wire (no
neutral)
Monitor ...............................32 VA, 120 Vac
(+10, -45%), 60 Hz
NGRM-ENC-2XX-X1,
NGRM-ENC-3XX-X1,
NGRM-ENC-4XX-X1,
NGRM-ENC-5XX-X1,
NGRM-ENC-6XX-X1,
NGRM-ENC-7XX-X1,
NGRM-ENC-8XX-X1,
NGRM-ENC-9XX-X1..........34 VA, 480/600 Vac,
60 Hz
3-phase, 3-wire (no
neutral)
Wiring Requirements:
Terminals Blocks:
Conductor Size................. 20 to 10 AWG
(0.52 to 5.26 mm2)
Fuseholders:
Conductor Size................. 14 to 6 AWG
(2.08 to 13.29 mm2)
Fuse Requirements:
F1:
Fuse Rating...................... 0.8 A, 600 Vac,
Class CC
Fuse Part Number............ Littelfuse KLDR.800T or
KLDR.800TXP (RoHS)
F2 to F4 (see order options):
Fuse Rating...................... 0.5 A, 600 Vac,
Fuse Part Number............ Littelfuse KLK.500
Dimensions:
Height................................. 454 mm (17.9”)
Width.................................. 406 mm (16.0”)
Maximum Depth (with
SE-IP65CVR-G installed).. 264 mm (10.4”)
Clearance required to open
SE-IP65CVR-G.................. 112 mm (4.4”)
Shipping Dimensions:
NGRM-ENC-XXX-XX:
Height .............................. 516 mm (20.3”)
Width............................... 465 mm (18.3”)
Depth ............................... 309 mm (12.2”)
Shipping Weight:
NGRM-ENC-XXX-XX ........13.6 kg (30 lb) maximum
Enclosure ................................. Polyester, Lockable
Ratings:
SE-325 Order Options ..... Type 4X
SE-330 Surface-Mount
Order Options .................. Type 4X
SE-330 Panel-Mount
Order Options .................. IP65
Environment:
Operating Temperature.........-40 to 60°C (-40 to
140°F)
Storage Temperature.............-55 to 80°C (-67 to
176°F)
Humidity................................85% Non-Condensing
Certification................................. CSA, Canada and USA
LR 53428
USC
R
To: CSA C22.2 No. 144 Ground Fault Circuit
Interrupters
CSA C22.2 No. 94 Special Purpose Enclosures
UL 1053 Ground Fault Sensing and Relaying
Equipment
UL 50 Enclosures for Electrical Equipment