Protection Relays & Controls
© 2013 Littelfuse Protection Relays & Controls
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.
Specifications
IEEE Device Numbers Checking or Interlocking Relay (3GC),
Ground Fault (50G/N, 51G/N)
Input Voltage See ordering information
Dimensions H 150 mm (5.9”); W 109 mm (4.3”);
D 100 mm (4.0”)
Trip Level Settings 0.5, 2.0, 4.0 A
Trip Time Settings 0.1 -1.0 s
Contact Operating Mode Selectable fail-safe or non-fail-safe (SE-105)
Fail-safe only (SE-107)
Harmonic Filtering Standard feature
Reset Button Local and remote
Output Contacts Isolated Form A
Approvals
CSA certified, UL Listed (E340889),
C-Tick (Australian)
Conformally Coated Standard feature
Warranty 5 years
Mounting Surface
ORDERING NUMBER CONTROL POWER
SE-105 120 Vac
SE-105D 120 Vac/Vdc
SE-105E 240 Vac
SE-107 120 Vac
SE-107D 120 Vac/Vdc
SE-107E 240 Vac
Ordering Information
Consult manual online for additional ordering options.
Simplified Circuit Diagram
CT200 Series Current Transformer
Required CT detects ground-fault current.
1N5339B Termination Device
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.
Accessories
A
B
TRAILING
CABLE
CT
L2
L1
TERMINATION
DEVICE
A
G
GC
C
B
GROUNDED
SUPPLY
M
SE-105 SERIES
SE-107 SERIES
(Ground-Fault
Ground-Check
Monitor)
B
FEATURES BENEFITS
Adjustable pickup
(0.5, 2.0, 4.0 A)
Unit can be used on a wide variety of trailing
cable applications
Adjustable time delay
(0.1 - 2.0 s)
Adjustable trip delay for quick protection and
system coordination
Harmonic filter Prevents false operation
Zener-characteristic
termination assembly
Provides reliable ground-check loop verification
Fail-safe ground-check circuit
Ensures ground-check circuit remains safe
even in the event of equipment failure
Conformal coating
Additional coating protects circuit boards
against harsh environment
SE-105: Selectable UV- or
shunt-trip mode
Provides flexibility for different applications
SE-107: UV-trip mode only
Eliminates chance of unauthorized change to
trip circuit
Features & Benefits
ACCESSORIES REQUIREMENT
CT200 Series Required
1N5339B Included
SE-TA6, SE-TA6-SM Optional
SE-TA6A Series Optional
RK-102, RK-105, RK-105I Optional
RK-13 Optional
PPI-600V Optional
A
Trailing Cable Protection–Ground-Fault Ground-Check Monitoring
Littelfuse.com/se-105, Littelfuse.com/se-107
Rev: 4-A-050213
SE-105 Based on Manual Rev 12
SE-107 Based on Manual Rev 4
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