Littelfuse Startco SE-107 User manual

3714 Kinnear Place Saskatoon, SK Canada S7P 0A6 Ph: [phone] Fx: [phone] www.littelfuse.com/relayscontrols
SE-107 MANUAL
GROUND-FAULT GROUND-CHECK MONITOR
REVISION 5-C-050715
RESETGROUND
FAULT
GROUND
CHECK
CT1 CT2 AB
GICI SW
L1
GC
L2
F1
F2
G
POWER
1.0
2.00.1
GF TRIP
TIME (s)
GF
4.0 A
2.0 A
0.5 A
ENHANCED
FI LTERING
Copyright 2015 by Littelfuse Startco
All rights reserved.
Document Number: PM-1305-EN
Printed in Canada.

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SE-107 Ground-Fault Ground-Check Monitor Rev. 5-C-050715
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SE-107 Ground-Fault Ground-Check Monitor Rev. 5-C-050715
TABLE OF CONTENTS
SECTION PAGE
1 General................................................................. 1
2 Operation.............................................................1
2.1 Settings.................................................................. 1
2.1.1 GF Trip Time.............................................1
2.1.2 GF..............................................................1
2.2 Output Relay......................................................... 1
2.3 Indication and Reset..............................................1
2.4 Fusing....................................................................1
3 Installation........................................................... 1
3.1 SE-107 .................................................................. 1
3.2 Ground-Fault CT................................................... 3
3.3 Ground-Check Termination..................................4
3.4 Remote Operation................................................. 4
3.5 Parallel-Path Isolation...........................................4
3.6 Ground-Fault Testing............................................ 4
4 Compatibility.......................................................4
5 Technical Specifications ...................................11
5.1 SE-107 ................................................................ 11
5.2 Current Sensors................................................... 12
5.3 Termination Assemblies ..................................... 12
6 Ordering Information....................................... 13
7 Warranty ...........................................................13
8 Ground-Fault Performance Test..................... 14
Appendix A SE-107 Revision History.........................15
LIST OF FIGURES
FIGURE PAGE
1 Typical Application ..............................................2
2 SE-107 Outline and Mounting Details.................. 3
3 Current Transformers............................................5
4 Zener-Diode Termination Devices........................ 5
5 SE-TA6 Termination Assembly............................ 6
6 SE-TA6SF-WL Small-Format Termination
Assembly with Wire Leads................................... 6
7 RK-102 Remote Indication and Reset Kit ............ 7
8 RK-105 Remote Indication-and-Reset Assembly.7
9 RK-105I Remote Indication Assembly................. 8
10 RK-13 Relay Interface Module............................. 8
11 PPI-600V Parallel-Path Isolator............................9
12 PPI-600V Typical Installation ............................ 10
13 Ground-Fault-Test Circuits................................. 14
LIST OF TABLES
TABLE PAGE
1 Terminal Designations...........................................4
2 Ground-Fault-Test Record...................................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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SE-107 Ground-Fault Ground-Check Monitor Rev. 5-C-050715
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Page 1
SE-107 Ground-Fault Ground-Check Monitor Rev. 5-C-050715
1. GENERAL
The SE-107 is a combination ground-fault and ground-
check monitor for resistance-grounded systems in non-
hazardous applications. The ground-fault circuit is
latching and the ground-check circuit is typically non-
latching. One output contact is provided for contactor
control or for undervoltage operation in a breaker trip
circuit.
Ground-fault current is sensed by a CT200-series
current transformer. A trip level of 0.5, 2.0, or 4.0 A is
switch selectable for use with a 5-, 15-, or 25-A
grounding resistor. Enhanced filtering eliminates false
ground-fault trips from adjustable-speed-drive harmonic
distortion. Trip time is adjustable from 0.1 to 2.0
seconds.
The fail-safe ground-check circuit is validated by an
end-of-line termination with a 5.6-volt Zener
characteristic. The Zener characteristic clamps induced
voltage and allows induced current to flow in the ground-
check loop. Consequently, induced-ac-withstand
capability, noise immunity, and open/short detection are
independent of current in the phase conductors.
Enhanced filtering prevents false ground-check validation
due to an active chopper condition. See
www.littelfuse.com/relayscontrols for Technical Note
GC-1.
CAUTION: The SE-107 is not a lock-out device. Follow
lock-out procedures for maintenance.
2. OPERATION
2.1 SETTINGS
2.1.1 GF TRIP TIME
Ground-fault trip time is adjustable from 0.1 to
2.0 seconds. Time-coordinated ground-fault protection
requires this setting to be longer than the trip time of
downstream ground-fault devices.
2.1.2 GF
The ground-fault-circuit trip level is 0.5, 2.0, or 4.0 A
when current is sensed with a CT200-series current
transformer. Since the ground-fault-circuit trip level
should not be greater than 20% of the grounding resistor
let-through current, these levels are appropriate for use
with 5-, 15-, or 25-A grounding resistors. For other
applications, the trip level of the ground-fault circuit is
0.25, 1.0, or 2.0% of the primary rating of the
5-A-secondary current transformer.
2.2 OUTPUT RELAY
The output relay operates in the undervoltage mode. It
is energized and its contact is closed when the ground-
check loop is valid and the ground-fault circuit is not
tripped. The undervoltage mode is referred to as fail-safe
because:
Undervoltage devices release if supply voltage fails.
Undervoltage ground-check circuits do not allow
cable couplers to be energized until the ground-check
loop is verified.
2.3 INDICATION AND RESET
The blue POWER LED indicates that the internal
power supply is on. The red GROUND FAULT LED
indicates a ground-fault trip and the green GROUND
CHECK LED indicates a valid ground-check loop. When
a ground-fault trip occurs, the SE-107 remains latched
until the reset switch is pressed or the supply voltage is
cycled. The ground-check circuit is non-latching and
does not require a reset. Terminals are provided for
remote indication and reset as shown in Fig. 1.
For the latching ground-check (Option L), the
GROUND CHECK LED is red and it indicates a latched
ground-check trip.
2.4 FUSING
The output contact is protected by fuse F1 (4.0 A, time
delay). The ground-check circuit is protected by fuse F2
(0.5 A, time delay).
3. INSTALLATION
3.1 SE-107
SE-107 outline and mounting details are shown in
Fig. 2. Typical connections are shown in Fig. 1. Connect
supply voltage to L1 and L2. For a 120-Vac supply,
connect supply neutral to L2. For a direct-current supply
(Option D), connect supply negative to L2. Connect
chassis-bonding terminal to ground.
Connect contact terminals A and B as required.
Faceplate LED’s are driven in series with remote-
indication LED’s. When a remote kit is not used,
terminals CI, +, and GI must be connected for the
faceplate LED’s to operate. These jumpers are installed
at the factory.
Connect terminal GC to the outgoing ground-check
conductor and connect terminal G to ground. To meet
electrical code requirements, do not jumper chassis-
bonding terminal to terminal G.
Install the upper terminal-block cover to prevent
inadvertent contact with line terminals.

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SE-107 Ground-Fault Ground-Check Monitor Rev. 5-C-050715
F1
F2
NOTE 1
REMOTE INDICATION AND RESET
LN GC
G
R
S
1
R
S
2
C
G
I
G
R
I
+
S
WK1 K2
SW CI/GI + GI/RI
TB1
F2
R
S
1
R
S
2
C
G
I
G
R
I
+
S
WK1 K2
SW CI/GI + GI/RI
TB1
F2
F2
RESETGROUND
FAULT
GF TRIP
TIME (s)
POWER
GROUND
CHECK
CT1 CT2 AB
GICISW
L1
GC
L2
G
0.1 2.0
1.0
GICISW GC G
GICISW GC G
GICISW GC G
ENHANCED
FILTERING
CT200
GROUND
GROUND CHECK
UV
120 VAC
LOAD
NOTE 1
STOP START
GC
G
USE LOW-
LEVEL
CONTACTS
HOLD-IN
CONTACT
ALTERNATETERMINATION CIRCUIT
FOR REMOTE CONTACTOR CONTROL
GROUND-CHECK
TERMINATION
RESET SWITCH
RED
GREEN
GI
+
CI
SW
GROUND-FAULT
INDICATOR
GROUND-CHECK
INDICATOR
RED
GREEN
RK-13 CONNECTION WITH REMOTE INDICATION AND RESET
24-120 Vac/Vdc
K1 K2 GI
+
CI
SW
NOTE 2
RESET SWITCH
GROUND-FAULT
INDICATOR
GROUND-CHECK
INDICATOR
ALTERNATE
RESET CIRCUIT
K1 K2
RK-13 CONNECTION WITHOUT REMOTE INDICATION OR RESET
NOTE 2
NOTES:
1. SEE ORDERING INFORMATION FOR
TERMINATION DEVICES. 5-W AXIAL
LEAD DEVICE INCLUDED.
2. K1 CLOSES ON GROUND-CHECK VALID.
FOR OPTION L K1 CLOSES ON
GROUND-CHECKTRIP.
K2 CLOSES ON GROUND-FAULTTRIP.
FIGURE 1. Typical Application.

Page 3
SE-107 Ground-Fault Ground-Check Monitor Rev. 5-C-050715
F1
F2
RESETGROUND
FAULT
GF TRIP
TIME (s)
GROUND
CHECK
CT1 CT2 AB
GICISW
L1
GC
L2
G
0.1 2.0
1.0
POWER
ENHANCED
FILTERING
109.0
(4.29)
88.9
(3.50)
4.8 (0.19) DIA
43.5
(1.71)
NOTE 5
NOTE 5
139.7
(5.50)
150.0
(5.90)
43.5
(1.71)
NOTE 4
100.0
(3.93)
77.8
(3.06)
NOTES:
1. DIMENSIONS IN MILLIMETRES (INCHES).
2. TERMINAL-BLOCK SCREWS: 6-32 x 0.25.
3. MOUNTING SCREWS: M4 OR 8-32.
4. SHOWN WITH TERMINAL-BLOCK COVER REMOVED.
5. MINIMUM CLEARANCE FOR FUSE REMOVAL.
FIGURE 2. SE-107 Outline and Mounting Details.
3.2 GROUND-FAULT CT
Outline and mounting details for CT200 and CT200L
current transformers are shown in Fig. 3. Pass the phase
conductors through the CT window as shown in Fig. 1.
Do not pass the ground or ground-check conductors
through the CT. In applications that require shields or
drain wires to pass through the CT, return them through
the CT before connecting them to ground.
Connect the secondary of the ground-fault CT to
SE-107 terminals CT1 and CT2. The CT connection to
the SE-107 is not polarity sensitive. Ground one side of
the CT secondary.
NOTE: The CT200 and CT200L are 600-V-rated current
transformers. When system voltage is above 600 V,
ensure conductors passed through the sensor window are
insulated to system voltage.

Page 4
SE-107 Ground-Fault Ground-Check Monitor Rev. 5-C-050715
3.3 GROUND-CHECK TERMINATION
Install the ground-check termination at the load to
complete the ground-check loop as shown in Fig. 1.
Termination outlines and mounting details are shown in
Figs. 4, 5, and 6. Use only a Littelfuse Startco termination
device; others may not meet performance requirements.
Connect terminal G of the termination to the equipment
frame so that the ground-conductor-to-equipment-frame
connection is included in the monitored ground-check
loop. Connect terminal GC of the termination to the
incoming ground-check conductor.
If ground-check interlocks are used, low-level
(bifurcated, precious-metal, or sealed-reed) contacts are
recommended.
If used as a ground-fault monitor only, install the
termination at the SE-107.
3.4 REMOTE OPERATION
Terminals SW, CI, , and GI are provided for remote
LED indication and remote reset as shown in Fig. 1.
Remote LED’s are driven in series with the front-panel
LED’s.
Remove factory-installed jumpers from terminals CI, +,
and GI, and connect a remote kit as shown in Fig. 1.
Optional remote kits are shown in Figs. 7, 8, and 9.
Standard LED indicator lamps are not compatible with
the SE-107.
For general-purpose applications, use the RK-105
Remote Indication-and-Reset Assembly or the RK-105I
Remote Indication Assembly. Connect terminals SW, CI,
+, and GI to remote-kit terminals SW, CI/RI, +, and GI.
For 22-mm-component applications, use the RK-102
Remote Indication and Reset Kit. Connect terminal X2 of
the green ground-check indicator to CI, terminal X2 of
the red ground-fault indicator to GI, and connect indicator
X1 terminals to +. For remote reset, connect the normally
open push-button switch across terminals + and SW.
If indication is required from a separate voltage source,
or if separate ground-fault and ground-check contacts are
required, use an RK-13 Relay Interface Module. The
RK-13 mounts on the SE-107 lower terminal block and is
compatible with the RK-102, RK-105 and RK-105I. See
Figs. 1 and 10. Contact K1 closes when the GC LED is
on and contact K2 closes when the GF LED is on.
3.5 PARALLEL-PATH ISOLATION
A PPI-600V can be used for parallel-path rejection. A
PPI-600V will also eliminate intermachine arcing and
prevent stray ac and dc currents from flowing in the
monitored ground wire. See Figs. 11 and 12. See
Technical Note GC-10 “Parallel Path Isolator” at
www.littelfuse.com/relayscontrols, or contact Littelfuse
Startco for application details.
3.6 GROUND-FAULT TESTING
Use CT-primary current injection to test the ground-
fault circuit. Fig. 13 shows test circuits using the SE-400
Ground-Fault-Relay Test Unit and the SE-100T Ground-
Fault-Relay Tester. The SE-400 has a programmable
output of 0.5 to 9.9 A for a duration of 0.1 to 9.9 seconds.
The SE-100T has LO and HI outputs for 5- and 15-A
resistance-grounded systems.
A test-record form is provided in Section 8 of this
manual. Record the test results and test dates on this form
to meet the requirements of the National Electrical Code
(NEC). Retain the form so that the test data can be made
available to the authority having jurisdiction.
4. COMPATIBILITY
The SE-107 is a direct replacement for the SEL-100,
SEL-100TD, SE-101, SE-102, SE-103, and SE-105 in
fail-safe applications. Terminal designations are shown
in Table 1.
Terminals CT1 and CT2 are transformer isolated so
that the CT secondary can be grounded. Units with old
designations do not allow the secondary of the ground-
fault CT to be grounded when the ground-check circuit is
used.
TABLE 1. TERMINAL DESIGNATIONS
OLD
DESIGNATION SE-105/SE-107
DESIGNATIONS
CT
CT
(RELAY)
(RELAY)
L
N
SW
PL
+
GL
P
G
CT1
CT2
A
B
L1
L2
SW
CI
+
GI
GC
G

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SE-107 Ground-Fault Ground-Check Monitor Rev. 5-C-050715
D
E
A
B
FRONT
44.5 MAX
(1.75)
NOTES:
1. DIMENSIONS IN MILLIMETRES
(INCHES).
2. MOUNTING SCREWS: M4 OR
8-32.
X1 X2
BLACK
WHITE
SIDE
9.4
(0.37)
F
B
C
22.2
(0.87)
44.5
(1.75)
TAP M4 OR 8-32
BOTTOM MOUNTING DETAIL
PART
NUMBER
DIMENSIONS
CT200
CT200L
A
55.9 (2.20)
88.9 (3.50)
B
120.7 (4.75)
154.0 (6.06)
C
101.6 (4.00)
133.4 (5.25)
D
98.3 (3.87)
139.7 (5.50)
E
108.0 (4.25)
144.5 (5.69)
F
5.6 (0.22)
7.1 (0.28)
FIGURE 3. Current Transformers.
69.9
(2.75)
GGC
TERMINATION MUST BE INSTALLED AT LOAD.
G
1N5339B
0.25” - 28 UNF
SE-TA6-SM
GGC
35.0
(1.38)
250 (9.84) LENGTH OF # 14 AWG
YELLOW STRANDED WIRE
NOTES:
1. DIMENSIONS IN MILLIMETRES (INCHES).
2. CAN BE IMMERSED IN GLYCOL.
10.0
(0.40)
FIGURE 4. Zener-Diode Termination Devices.

Page 6
SE-107 Ground-Fault Ground-Check Monitor Rev. 5-C-050715
G
GC
SE-TA6
TERMINATION
ASSEMBLY
40.0
(1.57)
67.0
(2.64)
4.5 (0.18) Ø, C’BORE 10.0 (0.39) Ø
3.2 (0.13) DEEP
41.5
(1.63)
22.2
(0.87)
10.5
(0.41)
40.0
(1.57)
19.0
(0.75)
8.0
(0.31)
TAP M4
OR 8-32
51.0
(2.01)
67.0
(2.64)
FRONT SIDE MOUNTING DETAIL
NOTES:
1. DIMENSIONS IN MILLIMETRES (INCHES).
2. TERMINAL-BLOCK SCREWS: 6-32 x 0.25.
3. MOUNTING SCREWS: M4 OR 8-32.
4. ENCLOSURE IS ELECTRICALLY CONNECTED
TOTERMINAL G.
5. CAN BE IMMERSED IN GLYCOL.
FIGURE 5. SE-TA6 Termination Assembly.
NOTE 2
4.0
(0.16)
50.8
(2.00)
12.7
(0.50)
3.2
(0.13)
MOUNTING DETAIL
12.7
(0.50)
SIDE
58.8
(2.32)
19.0
(0.75)
GC
300 (12) OF
YELLOW WIRE
G
300 (12) OF
GREEN/YELLOW WIRE
TOP
NOTES:
1. DIMENSIONS IN MILLIMETRES (INCHES).
2. MOUNTING SCREWS M3.5 OR 6-32.
3. CAN BE IMMERSED IN GLYCOL.
LR 53428
US
C
R
Rev:
SE-TA6ASF-WL
SE-TA6ASF-WL
Serial No:
01
DE130600619
Rating: 5.6 Vdc @ 105 mA 12 W Max
Use with: SE-134, SE-134C, SB6100
TERMINATION ASSY
FIGURE 6. SE-TA6ASF-WL Small-Format Termination Assembly with Wire Leads.

Page 7
SE-107 Ground-Fault Ground-Check Monitor Rev. 5-C-050715
NOTES:
1. DIMENSIONS IN MILLIMETRES
(INCHES).
2. ----- INDICATES CLEARANCE
REQUIRED.
3. PANELTHICKNESS 1.0TO 6.0
(0.04 TO 0.24).
4. NEMA 4X.
5. CERTIFICATIONS NOT SHOWN.
30.0
(1.18)
22.2 (0.87) DIA
25.0
(0.98)
15.0
(0.59)
22.5
(0.89)
MOUNTING DETAIL
30.0 MINIMUM
(1.18)
40.0 MINIMUM
(1.57)
36.6
(1.44)
17.3
(0.68)
29.9
(1.17)
43.5
(1.71)
36.6
(1.44)
14.9
(0.59)
29.9
(1.17)
43.5
(1.71)
LEGEND
PLATE
LEGEND PLATES
RESET GROUND CHECK GROUND FAULT
NOTE 2
LED PILOT LIGHTS
PUSH BUTTON
FIGURE 7. RK-102 Remote Indication and Reset Kit.
R
30.0
(1.18)
25.0
(0.98)
CI/RI
+
GI
SW
GROUND CHECK
GROUND FAULT
RESET
RK-105
60.0
(2.36)
44.5
(1.75)
7. 7
(0.30)
10.0
(0.40)
28.58
(1.125)
OUTLINE
96.0
(3.78)
76.0
(3.00)
1.25”
CONDUIT
KNOCKOUT
1.70” DIA
22.25
(0.875)
3.8 (0.15)
DIA
MOUNTING DETAILFRONT VIEW
SIDE VIEW
NOTES:
1. DIMENSIONS IN MILLIMETRES (INCHES).
2. NEMA 1.
FIGURE 8. RK-105 Remote Indication-and-Reset Assembly.

Page 8
SE-107 Ground-Fault Ground-Check Monitor Rev. 5-C-050715
CI/RI
+
GI
SW
RK-105I
R
GROUND CHECK
GROUND FAULT
30.0
(1.18)
25.0
(0.98)
SIDE VIEW FRONT VIEW
60.0
(2.36)
44.5
(1.75)
7. 7
(0.30)
10.0
(0.40)
28.58
(1.125)
OUTLINE
96.0
(3.78)
76.0
(3.00)
1.25”
CONDUIT
KNOCKOUT
1.70” DIA
22.25
(0.875)
3.8 (0.15)
DIA
MOUNTING DETAIL
NOTES:
1. DIMENSIONS IN MILLIMETRES (INCHES).
2. NEMA 1.
FIGURE 9. RK-105I Remote Indication Assembly.
R
S
1
R
S
2
C
G
I
G
R
I
+
S
WK1 K2
R
S
1
R
S
2
C
G
I
G
R
I
+
S
WK1 K2
TB1
SW CI/GI +GI/RI
31.0
(1.22)
47.5
(1.87)
60.2
(2.37)
SIDE VIEW
RK-13 SHOWN MOUNTED ON SE-105/SE-107/SE-325
21.0
(0.83)
INSTALLATION INSTRUCTIONS:
1. REMOVE FOUR LEFTMOST LOWERTERMINAL BLOCK SCREWS.
2. PLACE RK-13 ONTERMINAL BLOCK AND REPLACE SCREWS.
3. MAKE REQUIRED CONNECTIONSTOTERMINAL BLOCK TB1.
NOTES:
1. DIMENSIONS IN MILLIMETRES (INCHES).
FIGURE 10. RK-13 Relay Interface Module.

Page 9
SE-107 Ground-Fault Ground-Check Monitor Rev. 5-C-050715
9.5 DIA.
(0.38 DIA.)
12.7
(0.50)
19.1
(0.75)
19.1
(0.75)
63.5
(2.50)
8-32 TAP
260.4
(10.25)
190.5
(7.50)
34.9
(1.38) 152.4
(6.00)
34.9
(1.38)
235.0
(9.25)
NOTES:
1. DIMENSIONS IN MILLIMETRES (INCHES).
38.1
(1.50)
38.1
(1.50)
26.2
(1.03)
102.4 (4.03)
FIGURE 11. PPI-600V Parallel-Path Isolator.

Page 10
SE-107 Ground-Fault Ground-Check Monitor Rev. 5-C-050715
GROUND CHECK MONITOR
SE-105, SE-107, SE-134C, OR SE-135
CABLE
GROUND
G
GROUND
CHECK
GC
GC
G
OUTGOING
GROUND CHECK
OUTGOING
GROUND
INCOMING
GROUND
CHASSIS GROUND BUS PPI-600V
NOTES:
1. THE PARALLEL-PATH ISOLATOR IS NOT POLARIZED. EITHER FLANGE CAN BE
CONNECTEDTO CHASSIS.
2. THE OUTGOING GROUND MUST BE ISOLATED FROMTHE CHASSIS GROUND BUS.
IF A FLANGE-MOUNTED RECEPTACLE IS USED, VERIFY THAT THE FLANGE IS ISOLATED
FROMTHE GROUND PIN, AND
- USE A MATING PLUG WITH A NON-METALLIC HOUSING, OR
- ISOLATETHE FLANGE FROMTHE CHASSIS IF THE MATING PLUG HAS A
METALLIC HOUSING.
3. CABLE PLUGS AND RECEPTACLES WITH GROUNDED METAL HOUSING MUST BE
ISOLATED FROM GROUNDTO PREVENT PARALLEL GROUND PATHS.
4. FOR SYSTEMS ABOVE 600 VAC, CONNECT A V131DA40 MOV ACROSSTHE PPI-600V.
FIGURE 12. PPI-600V Typical Installation.

Page 11
SE-107 Ground-Fault Ground-Check Monitor Rev. 5-C-050715
5. TECHNICAL SPECIFICATIONS
5.1 SE-107
Supply:
ac............................................10 VA, 120 or 240 Vac
(+10, -45%), 50/60 Hz,
ac/dc.......................................5 W, 120 Vdc (+40, -8%);
10 VA, 120 Vac
(+10, -45%), 50/60 Hz,
NOTE: Voltage between supply terminals (L1, L2) and
ground terminal (G) must not exceed 300 Vac continuous
or 1,250 Vac under transient conditions.
Dimensions:
Height.................................150 mm (5.9”)
Width..................................109 mm (4.3”)
Depth ..................................100 mm (4.0”)
Shipping Weight.......................1 kg (2.2 lb)
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
Ground-Fault Circuit:
CT Ratio .............................200:5
CT Input Burden.................0.02 
Trip Level
(1) .......................0.5, 2.0, or 4.0 A
Frequency Response...........25 to 110 Hz
Trip Time............................0.1 to 2.0 s Adjustable
Thermal Withstand
(1) .........200 A Continuous,
2,500 A for 2 s
Trip-Level Accuracy...........+10, -20%
CT Lead Resistance Limit (2)
0.5 A Trip Level.........2 
2 A Trip Level............5 
4 A Trip Level............5 
Trip-Time Accuracy ...........10%
Trip Mode...........................Latching
Ground-Check Circuit:
Open-Circuit Voltage .........12 Vdc
Output Impedance...............240 
Nominal Loop Current........25 mA
Induced-ac Withstand.........25 Vac Continuous,
120 Vac for 3 s
Fuse Rating (F2).................0.5 A, 250 Vac,
Time Delay
Fuse Part Number...............Littelfuse 313.500 or
Bussman MDA-1/2,
MDL-1/2
Pull-in Filter........................Chopper Rejection
Pull-in Time........................1.5 s
Trip Time............................0.2 s (GC open),
0.5 s (GC to G short)
Trip-Time Accuracy........... +10, -30%
GC-Loop
Trip Resistance(3)................ 40 ± 10 
Operating Mode.................. Non-Latching,
Latching with Option L
Output Relay:
CSA/UL Contact Ratings... 1 mA to 4 A Resistive,
240 Vac or 28 Vdc
Supplemental Contact Ratings:
Make/carry 0.2 s.............. 10 A
Carry continuous ............. 4 A
Break:
dc .................................. 20 W Resistive,
10 W Inductive
(L/R = 0.04 s)
ac................................... 960 VA Resistive,
700 VA Inductive
(PF = 0.4)
Subject to maximums of 4 A and 240 V (ac or dc).
Contact Configuration........ N.O. (Form A)
Fuse Rating (F1)................. 4.0 A, 250 Vac,
Time Delay
Fuse Part Number............... Littelfuse 313004. or
Bussman MSL-4
Operating Mode.................. Undervoltage (Fail-Safe)
Remote Indication:
.......................................... 12 Vdc
GI/CI .................................. Current Sink,
560 Internal
Optional RK-13 Module:
Contact Ratings.....................0.08 A, 120 V (ac or dc)
0.50 A, 24 Vdc
Contact Configuration...........N.O. (Form A)
Reset Input.............................24 to 120 V (ac or dc),
Isolated
PWB Conformal Coating............MIL-1-46058 qualified,
UL QMJU2 recognized

Page 12
SE-107 Ground-Fault Ground-Check Monitor Rev. 5-C-050715
Certification..............................CSA, Canada and USA
LR 53428
USC
R
ULListed
Australia(4)
N11659
FCC
NOTES:
(1) Currents referred to primary of CT200 for prospective
ground-fault currents less than 4,000 A.
(2) Typical maximum CT lead resistance to meet
specified trip level accuracy.
(3) The GROUND CHECK LED may flash when the
GC-loop trip resistance is near the trip level.
(4) Applicable only on 240 Vac Supply (Option E in the
ordering information).
5.2 CURRENT SENSORS
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
CT200:
Current Ratio ......................200:5 A
Insulation ...............................600-V Class
Window Diameter.................56 mm (2.2”)
Shipping Weight....................1 kg (2.2 lb)
CT200L:
Current Ratio ......................200:5 A
Insulation ...............................600-V Class
Window Diameter.................89 mm (3.5”)
Shipping Weight....................1 kg (2.2 lb)
5.3 TERMINATION ASSEMBLIES
SE-TA6:
Characteristic......................Zener Diode,
Unidirectional
Circuit Type...........................High Current Shunt
Regulator
Reverse Voltage.....................5.6 ± 0.3 Vdc @ 25 mA
Forward Voltage....................0.65 ± 0.1 Vdc @ 25 mA
Operating Temperature .........-40 to 60°C (-40 to 140°F)
Power Rating.........................50 W
Screw Terminal .....................6-32 x 0.25”
Dimensions............................67 x 40 x 41.5 mm
(2.6 x 1.6 x 1.6”)
Shipping Weight....................200 g (0.45 lb)
SE-TA6ASF-WL:
Characteristic...................... 6-V Zener, Temperature
Compensated
Circuit Type........................ High-Current Shunt
Regulator
Reverse Voltage ................. 5.6 ±0.03 Vdc @ 100 mA
Forward Voltage................. 0.5 ±0.1 Vdc @ 100 mA
Operating Temperature....... -40 to 60°C (-40 to 140°F)
Current Range .................... 2 mAto15A
Maximum Clamping
Voltage............................... 55 V @ 250 A,
5x20 µs Pulse
Power Rating...................... 12 W
Wire Leads ......................... 18 AWG (0.82 mm2),
300 mm (11.8”)
Dimensions......................... 58.8 x 19 x 12.7 mm
(2.32 x 0.75 x 0.5”)
Shipping Weight................. 45 g (0.1 lb)
SE-TA6-SM:
Characteristic...................... Zener Diode,
Unidirectional
Circuit Type...........................High Current Shunt
Regulator
Reverse Voltage....................5.6 ± 0.3 Vdc @ 25 mA
Forward Voltage ...................0.65 ± 0.1 Vdc @ 25 mA
Operating Temperature.........-40 to 60°C (-40 to 140°F)
Power Rating.........................50 W
Screw Terminal.....................0.25” – 28 UNF
Dimensions:
Body ................................45 mm
Wire Lead........................250 mm (9.84”),
14 AWG (2.08 mm2)
Shipping Weight ...................45 g (0.1 lb)

Page 13
SE-107 Ground-Fault Ground-Check Monitor Rev. 5-C-050715
6. ORDERING INFORMATION
Option List
(1)
SE-107-
120-Vac Supply
(2)
E 240-Vac Supply
(3)
D 120-Vac/dc Supply
L Latching Ground-CheckTrip
(1)
List options required in order shown above.
(2)
Standard, leave blank.
(3)
Only Supply option available with C-Tick
certification.
Each SE-107 is supplied with a 1N5339B termination device.
Ground-Fault CT’s:
CT200.................................56 mm (2.2”) window
CT200L...............................89 mm (3.5”) window
Ground-Check Termination:
1N5339B ............................5-W Axial Lead
SE-TA6...............................50-W Assembly
SE-TA6-SM........................50-W Stud-Mount
Termination Assembly
SE-TA6ASF-WL................12-W Small-Format
Termination Assembly
with Wire Leads
Remote Indication and Reset:
RK-102...............................Includes two LED pilot
lights, a reset push button,
and legend plates
RK-105...............................Indication-and-Reset
Assembly
RK-105I..............................Indication Assembly
RK-13.................................Relay Interface Module
Parallel-Path Isolator:
PPI-600V............................For system voltages up to
600 Vac
7. WARRANTY
The SE-107 Ground-Fault Ground-Check Monitor is
warranted to be free from defects in material and
workmanship for a period of five years from the date of
purchase.
Littelfuse Startco will (at Littelfuse Startco’s option)
repair, replace, or refund the original purchase price of an
SE-107 that is determined by Littelfuse Startco to be
defective if it is returned to the factory, freight prepaid,
within the warranty period. This warranty does not apply
to repairs required as a result of misuse, negligence, an
accident, improper installation, tampering, or insufficient
care. Littelfuse Startco does not warrant products
repaired or modified by non-Littelfuse Startco personnel.

Page 14
SE-107 Ground-Fault Ground-Check Monitor Rev. 5-C-050715
8. GROUND-FAULT PERFORMANCE TEST
To meet the requirements of the National Electrical
Code (NEC), as applicable, the overall ground-fault
protection system requires a performance test when first
installed. A written record of the performance test is to
be retained by those in charge of the electrical installation
in order to make it available to the authority having
jurisdiction. A test record form is provided for recording
the date and the final results of the performance tests.
The following ground-fault system tests are to be
conducted by qualified personnel:
a) Evaluate the interconnected system in accordance with
the overall equipment manufacturer’s detailed
instructions.
b) Verify proper location of the ground-fault current
transformer. Ensure that the cable or bus passes
through the ground-fault current transformer window,
and that the grounding conductors or shields are not
encompassed by the ground-fault current transformer
in such a way as to cause ground-fault current to be
missed. These checks can be done visually with
knowledge of the circuit involved. The connection of
the current-transformer secondary to the SE-107 is not
polarity sensitive.
c) Verify that the system is correctly grounded and that
alternate ground paths do not exist that bypass the
current transformer. High-voltage testers and
resistance bridges can be used to determine the
existence of alternate ground paths.
d) Verify proper reaction of the circuit-interrupting
device in response to a simulated or controlled
ground-fault current. To simulate ground-fault
current, use CT-primary current injection. Fig. 13a
shows a test circuit using an SE-400 Ground-Fault-
Relay Test Unit. The SE-400 has a programmable
output of 0.5 to 9.9 A for a duration of 0.1 to 9.9
seconds. Set the test current to 0.6, 2.3, or 4.6 A for
SE-107 units set at 0.5, 2.0, or 4.0 A respectively.
Fig. 13b shows a test circuit using an SE-100T
Ground-Fault Relay Tester. The SE-100T provides a
test current of 0.65 or 2.75 A for testing 0.5- and 2.0-
A trip levels. Inject the test current through the
current-transformer window for at least 2.5 seconds.
Verify that the circuit under test has reacted properly.
Correct any problems and re-test until the proper
reaction is verified.
e) Record the date and the results of the test on the
attached test-record form.
L
N
CT200
LOAD
CT200
LOAD
a) USING SE-400
b) USING SE-100T
FROM
POWER
SOURCE
FROM
POWER
SOURCE
CT1 CT2
L1
L2
L
N
OP1 OP2
L1
L2
11
3
5
1
8
9
12
RMT1
RMT2
REMOTE
TEST
SE-107
SE-400
CT1 CT2
L1
L2
L
NSE-107
L
N
L1
L2
RMT
REMOTE
TEST SE-100T
CLO
HI
0.65 A
2.75 A
FIGURE 13. Ground-Fault-Test Circuits.
TABLE 2. GROUND-FAULT-TEST RECORD
DATE TEST RESULTS
Retain this record for the authority having jurisdiction.

Page 15
SE-107 Ground-Fault Ground-Check Monitor Rev. 5-C-050715
APPENDIX A
SE-107 REVISION HISTORY
MANUAL
RELEASE DATE MANUAL REVISION PRODUCT REVISION (REVISION NUMBER ON PRODUCT LABEL)
May 7, 2015 5-C-050715 04
April 29, 2015 5-B-042915
September 11, 2014 5-A-091114 03
MANUAL REVISION HISTORY
REVISION 5-C-050715
S
ECTION 5
FCC certification added.
Updated Fuse F1 part number.
Sections 5.2 and 5.3 added.
A
PPENDIX A
Revision history updated.
REVISION 5-B-042915
S
ECTION 5
Updated Fuse F1 part number.
A
PPENDIX A
Revision history updated.
REVISION 5-A-091114
S
ECTION 3
Updated Fig. 1.
S
ECTION 4
Updated Figs. 5, 6, 8, and 9.
S
ECTION 5
Updated RK-13 contact ratings.
Updated notes.
A
PPENDIX A
Revision history added.
PRODUCT REVISION HISTORY
R
EVISION 04
Minor hardware change.
R
EVISION 03
No change.

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SE-107 Ground-Fault Ground-Check Monitor Rev. 5-C-050715
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