SE-704 Datasheet, PDF (1/1 Pages) Littelfuse – The SE-704 is a microprocessor-based ground-fault relay

Protection Relays & Controls
Ground-Fault Protection–Grounded Systems
SE-704 SERIES (PGR-4704)
Earth-Leakage Monitor
Simplified Circuit Diagram
CT A
A
GROUNDED
SUPPLY
B
C
SE-704 SERIES
(Earth-Leakage Monitor)
L1
L2
Ordering Information
ORDERING NUMBER
CONTROL POWER
SE-704-0U
SE-704-0D
SE-704-0T
SE-704-03
120/240 Vac/Vdc
12/24 Vdc
48 Vdc
24 Vac
ACCESSORIES
SE-CS30 Series
PGA-0500
PMA-55, PMA-60
REQUIREMENT
Required
Optional
Optional
Note: For optional conformal coating please consult factory.
© 2015 Littelfuse Protection Relays & Controls
Littelfuse.com/se-704
Description
The SE-704 is a microprocessor-based ground-fault relay for resistance-
and solidly-grounded systems. It offers very sensitive ground-fault
detection as low as 10 mA and can be used on systems with
significant harmonic content. The SE-704 provides feeder-level
protection or individual-load protection. The output contacts can be
connected for use in protective tripping circuits or in alarm indication
circuits. The analog output can be used with a PLC or a meter.
Features & Benefits
FEATURES
Adjustable pickup
(10 mA - 5 A)
Adjustable time delay
(30 ms - 2.0 s)
Output contacts
Analog output
(0-5 V & 0-1 mA)
BENEFITS
Adjustable trip setting provides a wide range of low-level
protection and system coordination
Adjustable trip delay allows quick protection and system
coordination
Form A and Form B ground-fault output contacts for
operation of separate annunciation and trip circuits
Allows for connecting an optional meter (PGA-0500) or
control system
CT-Loop monitoring Alarms when CT is not connected
Selectable contact
operating mode
Selectable fail-safe or non-fail-safe operating modes
allows connection to shunt or undervoltage breaker coil
Harmonic filtering
Eliminates nuisance tripping
Non-volatile trip
memory
Retains trip state when de-energized to simplify
troubleshooting
Microprocessor based No calibration required saves maintenance cost
Universal
power supply
Allows operation in application where one side of PT is
faulted, provides flexibility for numerous applications
Accessories
A
SE-CS30 Series Ground-Fault Transformer
Required zero-sequence current transformer
specifically designed for low level detection. Flux
conditioner is included to prevent saturation.
PGA-0500 Analog % Current Meter
B
Optional panel-mounted analog meter displays ground-
fault current as a percentage of the set-point or 5 A.
Specifications
IEEE Device Numbers Ground fault (50G/N, 51G/N)
Input Voltage
See ordering information
Dimensions  H 75 mm (3.0"); W 55 mm (2.2"); D 115 mm (4.5")
Trip Level Settings
10 mA-5.0 A
Trip Time Settings
30-2000 ms
Contact Operating Mode Selectable fail-safe or non-fail-safe
Harmonic Filtering
Standard feature
Test Button
Standard feature
Reset Button
Standard feature
CT-Loop Monitoring
Standard feature
Output Contacts
Isolated Form A and Form B
Approvals
UL Listed (E340889), CSA, CE (European Union)
C-Tick (Australian)
Analog Output
0-5 V & 0-1 mA
Conformally coated
Optional
Warranty
5 years
Mounting
DIN, Surface (standard)
Panel (with PMA-55 or PMA-60 adapter)
Rev: 4-B-032515
Based on Manual Rev 7-C-082814