Protection Relays & Controls
Trailing Cable Protection–Ground-Fault Ground-Check Monitoring
SE-134C, SE-135 SERIES
Ground-Fault Ground-Check Monitor
Description
The SE-134C/SE-135 is a microprocessor-based, combination
ground-wire monitor and ground-fault relay for resistance-
grounded or solidly grounded systems. It continuously
monitors the integrity of the ground conductor to protect
portable equipment from hazardous voltages caused by ground
faults. The SE-134C/SE-135 is field proven in monitoring trailing
cables on large mobile equipment such as drag-lines, mining
shovels, shore-to-ship power cables, dock-side cranes, stacker-
reclaimers, submersible pumps, and portable conveyors.
Features & Benefits
FEATURES
Adjustable pickup
(0.5 -12.5 A for SE-CS10)
(2 - 50 A for SE-CS40)
Adjustable time delay
(0.1 - 2.5 s)
Output contacts
BENEFITS
Unit can be used on a wide variety of trailing cable
applications
Adjustable trip delay for quick protection and system
coordination
Separate annunciation of ground-fault and ground-
check faults
Indication of open or short ground-check wire
makes it easier to find faults
Alarms when CT is not connected
Makes unit suitable for applications with high
voltages and long cables
Prevents false operation
Provides reliable ground-check loop verification
Ensures ground-check and ground-fault circuits
remain safe even in the event of equipment failure
Additional coating protects circuit boards against
harsh environment
Simplified Circuit Diagram
CT
A
A
B
C
GC
G
TRAILING
CABLE
GROUNDED
SUPPLY
M
Ground-check
LED indication
CT-loop monitoring
High-induced-ac
rejection
DFT (Harmonic) filter
Zener-characteristic
termination assembly
SE-134C SERIES
SE-135 SERIES
L1
L2
(Ground-Fault
Ground-Check
Monitor)
TERMINATION
DEVICE
Fail-safe circuits
Conformal coating
XGC option
B
Increases maximum cable length for ground-check
monitoring (10 km typical)
Ordering Information
ORDERING
NUMBER
OPTION
POWER SUPPLY
COMM
Accessories
A
SE-134C
Blank or
XGC
Blank or
XGC
SE-CS10 or SE-CS40 Series Ground-Fault
Current Transformer
Required zero-sequence current transformer
detects ground-fault current.
SE-TA6A Series, SE-TA12A Series
Termination Assembly
Required termination assembly; temperature
compensated.
0=120/240
Vac/Vdc
1=24/48 Vdc
(1)
0=120/240
Vac/Vdc
1=24/48 Vdc
(1) (2)
0=None
B
SE-135
0=None
3=
Ethernet
(1)
Specifications
IEEE Device Numbers
Input Voltage
Dimensions
Trip Level Settings
Trip Time Settings
Contact Operating Mode
Harmonic Filtering
Test Button
Reset Button
Output Contacts
Approvals
Conformally Coated
Warranty
Mounting
GC Trip Resistance
Checking or Interlocking Relay (3GC),
Ground fault (50G/N, 51G/N)
65-265 Vac; 85-275 Vdc; 18-72 Vdc
H
213 mm (8.4");
W
99 mm (3.9");
D
132 mm (5.2");
0.5 -12.5 A for SE-CS10, 2 - 50 A for SE-CS40
0.1-2.5 s
Selectable fail-safe or non-fail-safe
Standard feature
Standard feature
Standard feature
Isolated Form A and Form B, Two Form C
CSA certified, UL Listed (E340889),
C-Tick (Australia)
(3)
, CE
(3)
Standard feature
5 years
Panel, Surface
28Ω (Standard), 45Ω (XGC Option)
Rev: 4-D-102214
SE-134C Based on Manual Rev: 7-C-100114
SE-135 Based on Manual Rev: 3-C-100314
ACCESSORIES
REQUIREMENT
SE-CS10 Series
SE-CS40 Series (for SE-135)
SE-TA6A Series (for SE-134C)
SE-TA12A/SE-TA12B
Combination (for SE-134C)
SE-TA12A Series (for SE-135)
SE-IP65CVR-G
RK-132
PPI-600V
Required
Optional
Required
Optional
Required
Optional
Optional
Optional
(1) CE/C-Tick not available.
(2) Not available with Ethernet option 3.
(3) See ordering information.
See Current Transformer Selection Guide and Accessory Information.
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Littelfuse.com/se-134c, Littelfuse.com/se-135
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