SE-704 [LITTELFUSE]
The SE-704 is a microprocessor-based ground-fault relay;
| 型号： | SE-704 |
| 厂家： | 
LITTELFUSE |
| 描述： | The SE-704 is a microprocessor-based ground-fault relay |
| 文件： | 总1页 (文件大小：370K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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
BENEFITS
Adjustable pickup
(10 mA-5 A)
Adjustable trip setting provides a wide range of low-level
protection and system coordination
Adjustable time delay Adjustable trip delay allows quick protection and system
(30 ms-2.0 s)
coordination
Form A and Form B ground-fault output contacts for
operation of separate annunciation and trip circuits
Output contacts
Analog output
(0-5V & 0-1 mA)
Allows for connecting an optional meter (PGA-0500) or
control system
Simplified Circuit Diagram
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
CT
A
Harmonic filtering
Eliminates nuisance tripping
A
B
C
Non-volatile trip
memory
Retains trip state when de-energized to simplify
troubleshooting
GROUNDED
SUPPLY
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
SE-CS30 Series Ground-FaultTransformer
Required zero-sequence current transformer
specifically designed for low level detection. Flux
conditioner is included to prevent saturation.
A
SE-704 SERIES
(Earth-Leakage Monitor)
L1
L2
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
IEEE Device Numbers
Input Voltage
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
Ordering Information
ORDERING NUMBER
SE-704-0U
CONTROL POWER
120/240 Vac/Vdc
12/24 Vdc
Dimensions
Trip Level Settings
Trip Time Settings
30-2000 ms
SE-704-0D
Contact Operating Mode Selectable fail-safe or non-fail-safe
Harmonic Filtering
Test Button
Reset Button
Standard feature
Standard feature
Standard feature
SE-704-0T
48 Vdc
SE-704-03
24 Vac
CT-Loop Monitoring
Output Contacts
Approvals
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
ACCESSORIES
SE-CS30 Series
PGA-0500
REQUIREMENT
Required
Analog Output
Conformally coated
Warranty
Optional
PMA-55, PMA-60
Optional
5 years
Mounting
DIN, Surface (standard)
Panel (with PMA-55 or PMA-60 adapter)
Note: For optional conformal coating please consult factory.
© 2015 Littelfuse Protection Relays & Controls
Littelfuse.com/se-704
Rev: 4-B-032515
Based on Manual Rev 7-C-082814
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