Protection Relays & Controls
Ground-Fault Protection–Grounded Systems
SE-704 SERIES (PGR-4704)
Earth-Leakage Monitor
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)
CT-Loop monitoring
Selectable contact
operating mode
Harmonic filtering
Non-volatile trip
memory
Microprocessor based
Universal
power supply
Simplified Circuit Diagram
CT
A
GROUNDED
SUPPLY
B
C
A
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
Alarms when CT is not connected
Selectable fail-safe or non-fail-safe operating modes
allows connection to shunt or undervoltage breaker coil
Eliminates nuisance tripping
Retains trip state when de-energized to simplify
troubleshooting
No calibration required saves maintenance cost
Allows operation in application where one side of PT is
faulted, provides flexibility for numerous applications
Accessories
A
SE-704 SERIES
(Earth-Leakage Monitor)
L1
L2
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
Optional panel-mounted analog meter displays ground-
fault current as a percentage of the set-point or 5 A.
B
Specifications
Ordering Information
ORDERING NUMBER
CONTROL POWER
SE-704-0U
SE-704-0D
SE-704-0T
SE-704-03
ACCESSORIES
120/240 Vac/Vdc
12/24 Vdc
48 Vdc
24 Vac
REQUIREMENT
SE-CS30 Series
PGA-0500
PMA-55, PMA-60
Required
Optional
Optional
IEEE Device Numbers
Input Voltage
Dimensions
Trip Level Settings
Trip Time Settings
Contact Operating Mode
Harmonic Filtering
Test Button
Reset Button
CT-Loop Monitoring
Output Contacts
Approvals
Analog Output
Conformally coated
Warranty
Mounting
Note: For optional conformal coating please consult factory.
Ground fault (50G/N, 51G/N)
See ordering information
H
75 mm (3.0");
W
55 mm (2.2");
D
115 mm (4.5")
10 mA-5.0 A
30-2000 ms
Selectable fail-safe or non-fail-safe
Standard feature
Standard feature
Standard feature
Standard feature
Isolated Form A and Form B
UL Listed (E340889), CSA, CE (European Union)
C-Tick (Australian)
0-5 V & 0-1 mA
Optional
5 years
DIN, Surface (standard)
Panel (with PMA-55 or PMA-60 adapter)
Rev: 4-B-032515
Based on Manual Rev 7-C-082814
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