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SE-704-0T

更新时间： 2024-11-30 01:04:19
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力特 - LITTELFUSE /
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描述
The SE-704 is a microprocessor-based ground-fault relay

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SE-704-0T 数据手册

  
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  
1

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