Protection Relays & Controls
Trailing Cable Protection–Ground-Fault Ground-Check Monitoring
SE-105, SE-107 SERIES
Ground-Fault Ground-Check Monitor
Description
The SE-105/SE-107 is a combination ground-wire monitor
and ground-fault relay for resistance-grounded systems. It
continuously monitors the integrity of the ground conductor
to protect portable equipment from hazardous voltages
caused by ground faults. The SE-105/SE-107 is an excellent
choice for trailing cables 5 kV and under in underground mining
applications. For higher voltages or long-cable applications, see
the SE-134C/SE-135.
Features & Benefits
FEATURES
Adjustable pickup
(0.5, 2.0, 4.0 A)
Adjustable time delay
(0.1 - 2.0 s)
Harmonic filter
Zener-characteristic
termination assembly
Fail-safe ground-check circuit
M
BENEFITS
Unit can be used on a wide variety of trailing
cable applications
Adjustable trip delay for quick protection and
system coordination
Prevents false operation
Provides reliable ground-check loop verification
Ensures ground-check circuit remains safe
even in the event of equipment failure
Additional coating protects circuit boards
against harsh environment
Provides flexibility for different applications
Eliminates chance of unauthorized change to
trip circuit
Simplified Circuit Diagram
CT
A
A
B
C
GC
G
TRAILING
CABLE
GROUNDED
SUPPLY
Conformal coating
SE-105: Selectable UV- or
shunt-trip mode
SE-107: UV-trip mode only
SE-105 SERIES
SE-107 SERIES
L1
L2
(Ground-Fault
Ground-Check
Monitor)
TERMINATION
DEVICE
B
Accessories
A
CT200 Series Current Transformer
Required CT detects ground-fault current.
1N5339B Termination Device
B
5 W axial-lead ground-check termination;
included
with SE-105/SE-107.
SE-TA6 Termination Assembly
Optional termination assembly with convenient
terminals and mounting holes
SE-TA6-SM Stud-Mount Termination Assembly
Optional 50 W ground-check termination that is
robust and compact for submersible pumps. Wire
lead simplifies installation.
Ordering Information
ORDERING NUMBER
CONTROL POWER
SE-105
SE-105D
SE-105E
SE-107
SE-107D
SE-107E
ACCESSORIES
120 Vac
120 Vac/Vdc
240 Vac
120 Vac
120 Vac/Vdc
240 Vac
REQUIREMENT
Specifications
IEEE Device Numbers
Input Voltage
Dimensions
Consult manual online for additional ordering options.
CT200 Series
1N5339B
SE-TA6, SE-TA6-SM
SE-TA6A Series
RK-102, RK-105, RK-105I
RK-13
PPI-600V
Required
Included
Optional
Optional
Optional
Optional
Optional
Trip Level Settings
Trip Time Settings
Contact Operating Mode
Harmonic Filtering
Reset Button
Output Contacts
Approvals
Conformally Coated
Warranty
Mounting
Checking or Interlocking Relay (3GC),
Ground Fault (50G/N, 51G/N)
See ordering information
H
150 mm (5.9”);
W
109 mm (4.3”);
D
100 mm (4.0”)
0.5, 2.0, 4.0 A
0.1-1.0 s
Selectable fail-safe or non-fail-safe (SE-105)
Fail-safe only (SE-107)
Standard feature
Local and remote
Isolated Form A
CSA certified,
UL Listed (E340889),
C-Tick (Australian)
Standard feature
5 years
Surface
Rev: 4-B-102214
SE-105 Based on Manual Rev: 13-D-050315
SE-107 Based on Manual Rev: 5-C-050715
© 2015 Littelfuse Protection Relays & Controls
Littelfuse.com/se-105, Littelfuse.com/se-107
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