Littelfuse SE-135 User Manual
Protection Relays & Controls
Trailing Cable Protection–Ground-Fault Ground-Check Monitoring
SE-134C, SE-135 SERIES (PGM-8134)
Ground-Fault Ground-Check Monitor
Simplified Circuit Diagram
GC
TRAILING
CABLE
A
B
C
G
GROUNDED
SUPPLY
SE-134C SERIES
L1
L2
CT
SE-135 SERIES
(Ground-Fault
Ground-Check
Monitor)
A
Ordering Information
ORDERING
NUMBER
SE-134C
SE-135
ACCESSORIES REQUIREMENT
OPTION
Blank or
XGC
Blank or
XGC
SE-CS10 Series Required
SE-CS40 Series (for SE-135) Optional
SE-TA6A Series (for SE-134C) Required
SE-TA12A/SE-TA12B
Combination (for SE-134C)
SE-TA12A Series (for SE-135) Required
SE-IP65CVR-G Optional
RK-132 Optional
PPI-600V Optional
See Current Transformer Selection Guide and Accessory Information.
© 2013 Littelfuse Protection Relays & Controls
Littelfuse.com/se-134c, Littelfuse.com/se-135
POWER
SUPPLY
0=120/240
Vac/Vdc
1=24/48 Vdc
0=120/240
Vac/Vdc
1=24/48 Vdc 3=
Optional
TERMINATION
DEVICE
B
COMM
0=None
0=None
Ethernet
Description
The SE-134C/SE-135 is a microprocessor-based, combination
ground-wire monitor and ground-fault relay for resistancegrounded 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 BENEFITS
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
Ground-check
LED indication
CT-loop monitoring Alarms when CT is not connected
High-induced-ac
M
rejection
DFT (Harmonic) filter Prevents false operation
Zener-characteristic
termination assembly
Fail-safe circuits
Conformal coating
xGC option
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 groundcheck faults
Indication of open or short ground-check wire
makes it easier to find faults
Makes unit suitable for applications with high
voltages and long cables
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
Increases maximum cable length for ground-check
monitoring (10 km typical)
Accessories
A
B
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.
Specifications
IEEE Device Numbers Checking or Interlocking Relay (3GC),
Ground fault (50G/N, 51G/N)
Input Voltage 65-265 Vac; 85-275 Vdc; 18-72 Vdc
Dimensions H 213 mm (8.4"); W 99 mm (3.9"); D 132 mm (5.2");
Trip Level Settings 0.5 -12.5 A for SE-CS10, 2 - 50 A for SE-CS40
Trip Time Settings 0.1 -2. 5 s
Contact Operating Mode Selectable fail-safe or non-fail-safe
Harmonic Filtering Standard feature
Test But ton Standard feature
Reset Button Standard feature
Output Contacts Isolated Form A and Form B, Two Form C
Approvals
C-Tick (Australia), CE
Conformally Coated Standard feature
Warranty 5 years
Mounting Panel, Surface
GC Trip Resistance 28Ω (Standard), 45Ω (XGC Option)
CSA certified,
UL Listed (E340889),
Rev: 4-A-061913
SE-134C Based on Manual Rev 7-A-050613
SE-135 Based on Manual Rev 3-A-051413
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