SE-145 Datasheet, PDF (1/1 Pages) Littelfuse – The SE-145 is a three-channel

Protection Relays & Controls
Trailing Cable Protection–Ground-Fault Ground-Check Monitoring
SE-145 SERIES
Ground-Fault Ground-Check Monitor
Simplified Circuit Diagram
GROUNDED
SUPPLY
A ^CT B
SE-145
CHANNEL A
SERIES
L1
(Ground-Fault
L2
Ground-Check TRIP A
Monitor)
TRAILING
A ^CABLE
B
C
GC
G
M
TERMINATION
DEVICE
C
CHANNEL B
CHANNEL C
Application Diagram
SUBSTATION
GC
SE-135
L1
L2
G
SPLITTER
BOX _MODEM
SE-TA12A
GC
G
GC A
GA
COMM _SE-145
TRIP A
TRIP B
TRIP C
GC C
GC B
GB
GC
LOAD A
SE-TA12A
GC
G_C
LOAD B
SE-TA12A
GC
GC
LOAD C
SE-TA12A
GC
GC
Ordering Information
ORDERING NUMBER
SE-145-00-00
SE-145-03-00
SE-145-30-00
SE-145-33-00
CONTROL POWER
120/240 Vac; 110-250 Vdc
120/240 Vac; 110-250 Vdc
24 Vdc Battery Back-up
24 Vdc Battery Back-up
COMM
–
Modbus^® TCP
–
Modbus^® TCP
ACCESSORIES
REQUIREMENT
SE-CS10 or SE-CS40 Series Required
SE-TA12A Series
Required
RK-132
Optional
See Current Transformer Selection Guide and Accessory Information.
© 2013 Littelfuse Protection Relays & Controls
Littelfuse.com/se-145
Description
The SE-145 is a three-channel, 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 wire to protect portable
equipment from hazardous voltages caused by ground faults. The
SE-145 is designed for use on three-way splitter box applications.
Features & Benefits
FEATURES
Adjustable pickup
(0.5 - 12.5 A)
Adjustable time delay
(1 - 2.5 s)
Output contacts
Ground-check
LED indication
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
CT-Loop monitoring
High-induced-ac
rejection
Alarms when CT is not connected
Makes unit suitable for applications with high
voltages and long cables
DFT (harmonic) filter Prevents false operation
Zener-characteristic
termination assembly
Fail-safe circuits
Conformal coating
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
Accessories
SE-CS10 Series Ground-Fault Current
Transformer
A
Zero-sequence current transformer detects
ground-fault current. Provides 0.5 to 12.5 A
trip range.
SE-CS40 Series Ground-Fault Current
B
Transformer
Zero-sequence current transformer detects
ground-fault current. Provides 2.0 to 50 A
trip range.
C
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
60-265 Vac, 60VA; 82-275 Vdc, 45W;
18-30Vdc, 45W
Dimensions H 213 mm (8.4"); W 192 mm (7.6"); D 176 mm (7.0")
Trip Level Settings
0.5 -12.5 A or 2.0-50.0 A
Trip Time Settings
0.1-2.5 s
Contact Operating Mode Selectable fail-safe or non-fail-safe
Harmonic Filtering
Standard feature
Test Button
Standard feature
Reset Button
Standard feature
Communications
Ethernet Optional
Output Contacts
Isolated Form A and Form B
Conformally Coated
Standard feature
Warranty
5 years
Mounting
Panel, Surface
Rev: 4-C-121013