Littelfuse SE-107 User Manual
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 BENEFITS
Adjustable pickup
(0.5, 2.0, 4.0 A)
Adjustable time delay
(0.1 - 2.0 s)
Harmonic filter Prevents false operation
Simplified Circuit Diagram
GC
TRAILING
CABLE
A
B
C
G
GROUNDED
SUPPLY
L1
L2
CT
SE-105 SERIES
SE-107 SERIES
(Ground-Fault
Ground-Check
Monitor)
A
Ordering Information
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
Consult manual online for additional ordering options.
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
© 2013 Littelfuse Protection Relays & Controls
Littelfuse.com/se-105, Littelfuse.com/se-107
M
TERMINATION
DEVICE
B
Zener-characteristic
termination assembly
Fail-safe ground-check circuit
Conformal coating
SE-105: Selectable UV- or
shunt-trip mode
SE-107: UV-trip mode only
Accessories
A
B
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”);
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
C-Tick (Australian)
Conformally Coated Standard feature
Warranty 5 years
Mounting Surface
Unit can be used on a wide variety of trailing
cable applications
Adjustable trip delay for quick protection and
system coordination
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
CT200 Series Current Transformer
Required CT detects ground-fault current.
1N5339B Termination Device
5 W axial-lead ground-check termination
with SE-105/SE-107.
; included
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.
D 100 mm (4.0”)
CSA certified, UL Listed (E340889),
SE-105 Based on Manual Rev 12
SE-107 Based on Manual Rev 4
Rev: 4-A-050213
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