EL731-21-X0 [LITTELFUSE]
The EL731 is a microprocessor-based;
| 型号： | EL731-21-X0 |
| 厂家： | 
LITTELFUSE |
| 描述： | The EL731 is a microprocessor-based |
| 文件： | 总2页 (文件大小：375K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Protection Relays and Controls
Earth-Leakage Protection–Grounded AC or DC Systems
EL731 SERIES
AC/DC Sensitive Earth-Leakage Relay
Description
The EL731 is a microprocessor-based AC/DC Sensitive
Earth-Leakage Relay that offers complete coverage for all
frequencies from 0 to 6,000 Hz. Two CTs are required for the
entire frequency range, or one CT can be used for only low- or
high-frequency detection. An RTD/PTC sensor input allows
over-temperature protection for a motor or drive. The EL731
offers metering, password-protected alarm and trip settings
and optional network communications. It is primarily used to
add low-level ground-fault protection to variable-speed drives,
and to dc circuits.
Simplified Circuit Diagram
A
A
CT1
CT2
A
B
C
A
CT1
GROUNDED
AC SUPPLY
+
–
GROUNDED
DC SUPPLY
EL731 SERIES
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EL731 SERIES
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L1
L2
L1
L2
AC Mode
DC Mode
For detailed wiring diagram, see adjacent page.
Accessories
Ordering Information
EFCT Series Earth-Fault Current
Transformer
Required zero-sequence current transformer
specifically designed for low level detection.
A
CONTROL
ORDERING NUMBER
POWER
COMMUNICATIONS
EL731-00-X0
EL731-01-X0
EL731-02-X0
EL731-03-X0
EL731-04-X0
EL731-10-X0
EL731-11-X0
EL731-12-X0
EL731-13-X0
EL731-14-X0
EL731-20-X0
EL731-21-X0
EL731-22-X0
EL731-23-X0
EL731-24-X0
120/240 Vac/Vdc
None
120/240 Vac/Vdc
120/240 Vac/Vdc
120/240 Vac/Vdc
120/240 Vac/Vdc
48 Vdc & 24 Vac
48 Vdc & 24 Vac
48 Vdc & 24 Vac
48 Vdc & 24 Vac
48 Vdc & 24 Vac
24 Vdc
DeviceNet™
Profibus®
EtherNet/IP™
Modbus® TCP
None
DeviceNet™
Profibus®
EtherNet/IP™
Modbus® TCP
None
AC700-CUA Series
Communication Adapter
Optional network-interface and firmware-
upgrade communications adapters field-install
in EL731.
AC700-SMK DIN-rail & Surface-mount Adapter
EL731 plugs into adapter for back-plane
mounting.
ACCESSORIES
EFCT Series CT
REQUIREMENT
One Required
AC700-CUA Series Com. Unit
AC700-SMK Surface-Mount Kit
Optional
Optional
24 Vdc
DeviceNet™
Profibus®
EtherNet/IP™
Modbus® TCP
AC700-CVR-00 Watertight Cover (IP66) for
Panel-Mount Applications
24 Vdc
Optional
Optional
24 Vdc
PGA-0520 Analog Meter
24 Vdc
Note: When building a part number, replace the “X” with “1” for AS/NZS 2081:2011 Compliant product, “0” otherwise.
Rev: 4-F-040716
Based on Manual Rev 6-F-031116
© 2016 Littelfuse Protection Relays & Controls
Littelfuse.com/el731
Protection Relays and Controls
Earth-Leakage Protection–Grounded AC or DC Systems
EL731 SERIES
AC/DC Sensitive Earth-Leakage Relay
Features & Benefits
FEATURES
BENEFITS
Adjustable pickup (30-5,000 mA)
Frequency range (0-90 Hz, 20-6,000 Hz)
32-char OLED display
Local LED indication
Adjustable trip setting provides a wide range of low-level protection and system coordination
Operate in either AC or DC mode or both. Use single or combined ranges. Separate metering
Earth-leakage metering, setup and programming
Visual Trip, Alarm, CT connection indication
CT-Loop monitoring
Alarms when CT is not connected
Analog output (4-20 mA)
Adjustable time delay
Alarm and trip settings
Temperature-sensor input
Output contacts
Connect to DCS. Allows connection to an optional meter (PGA-0520) or control system
Adjustable trip delay for quick protection and system coordination
Detect a deteriorating condition before damage occurs
Drive or motor temperature protection
3 programmable: Operate 2 alarm and 1 trip circuit
Optional connection to plant network
Network communication
Harmonic filtering
Eliminates nuisance tripping due to harmonic noise
No required calibration saves maintenance cost
Microprocessor based
Universal power supply
Provides flexibility for numerous applications
Wiring Diagram
Specifications
IEEE Device Numbers
AC ground fault (50G/N, 51G/N),
LINE 1
LINE 2/N
OPTIONAL
NETWORK
COMM
DC ground fault (79G),
PTC overtemperature (49),
RTD temperature (38, 49)
120/240 Vac/Vdc, 24 Vdc,
48 Vdc/24 Vac
L1
14
L2/N 15
GND
16
AC/DC SENSITIVE
EARTH-LEAKAGE RELAY
Supply Voltage
EL731
K1
20
Trip Level Settings
Alarm Level Settings
Trip Delay
Output Contacts
Contact Operating Mode Fail-safe & non-fail-safe
Reset
Freq. Response, CT1
Freq. Response, CT2
30-5,000 mA AC and DC
30-5,000 mA AC and DC
0.05-2 s
FAꢀLT
19
22
18
21
K2
K3
3 Form C (programmable)
23
24
Front panel and remote
0-90 Hz
20-6,000, 190-6,000, 20-90, 20-3,000 Hz;
selectable
EFCT-x series
Open & short detection
Plug-in, wire clamping,
24 to 12 AWG (0.2-2.5 mm2)
EtherNet/IP™, DeviceNet™, Profibus®,
Modbus® TCP (optional)
4-20 mA (selectable 0-5 A or
0-100% trip-level setting)
Standard feature
25
11
26
S21
NC
17
Current Transformer
CT Detection
Terminals
EFCT-X
EFCT-X
20-6000 HZ CT
10
9
S22
PTC
+t˚
RTD
t˚
TC
TB
TA
TC
TC
5
4
3
SH2
RTD/PTC
TB
TA
TB
TA
8
S11
Communications
Analog Output
DC-90 HZ CT
S12
7
6
SUPPLY
+ –
SH1
AB
AA
2
1
ANALOG
PGA-0520
4-20mA
Conformal Coating
Dimensions
OUT
RST
13
12
REMOTE
RESET
H 48 mm (1.9”); W 96 mm (3.8”);
D 129 mm (5.0”)
GND
Approvals
UL Listed (E340889), CSA,
RCM (Australia), CE
Warranty
Mounting
5 years
Panel; Surface and DIN (with optional
AC700-SMK)
Littelfuse reserves the right to make product changes, without notice. Material in this document is as accurate as known at the time of publication. Visit Littelfuse.com for the most up-to-date information.
Rev: 4-F-040716
Based on Manual Rev 6-F-031116
© 2016 Littelfuse Protection Relays & Controls
Littelfuse.com/el731
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