Earth-Leakage Protection–Grounded AC or DC Systems
EL731 SERIES
AC/DC Sensitive Earth-Leakage Relay
Features & Benefits
FEATURES
Adjustable pickup (30-5,000 mA)
Frequency range (0-90 Hz, 20-6,000 Hz)
32-char OLED display
Local LED indication
CT-Loop monitoring
Analog output (4-20 mA)
Adjustable time delay
Alarm and trip settings
Temperature-sensor input
Output contacts
Network communication
Harmonic filtering
Microprocessor based
Universal power supply
BENEFITS
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
Alarms when CT is not connected
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
Eliminates nuisance tripping due to harmonic noise
No required calibration saves maintenance cost
Provides flexibility for numerous applications
Wiring Diagram
LINE 1
14 L1
Specifications
OPTIONAL
NETWORK
COMM
LINE 2/N
L2/N 15
GND
16
AC/DC SENSITIVE
EARTH-LEAKAGE RELAY
EL731
19
K1
20
FAULT
18
K2
21
23
K3
24
26
22
25
11
S21
10
S22
9
SH2
8
S11
7
S12
6
SH1
EFCT-X
20-6000 HZ CT
NC 17
TC 5
TC
TB
TA
SUPPLY
PTC
TC
TB
TA
RTD
t˚
+t˚
RTD/PTC
TB 4
EFCT-X
DC-90 HZ CT
TA 3
REMOTE
RESET
13
RST
12
GND
ANALOG
OUT
AB 2
4-20mA
AA 1
+–
PGA-0520
AC ground fault (50G/N, 51G/N),
DC ground fault (79G),
PTC overtemperature (49),
RTD temperature (38, 49)
Supply Voltage
120/240 Vac/Vdc, 24 Vdc,
48 Vdc/24 Vac
Trip Level Settings
30-5,000 mA AC and DC
Alarm Level Settings
30-5,000 mA AC and DC
Trip Delay
0.05-2 s
Output Contacts
3 Form C (programmable)
Contact Operating Mode
Fail-safe & non-fail-safe
Reset
Front panel and remote
Freq. Response, CT1
0-90 Hz
Freq. Response, CT2
20-6,000, 190-6,000, 20-90, 20-3,000 Hz;
selectable
Current Transformer
EFCT-x series
CT Detection
Open & short detection
Terminals
Plug-in, wire clamping,
24 to 12 AWG (0.2-2.5 mm
2
)
Communications
EtherNet/IP™, DeviceNet™, Profibus
®
,
Modbus
®
TCP
(optional)
Analog Output
4-20 mA (selectable 0-5 A or
0-100% trip-level setting)
Conformal Coating
Standard feature
Dimensions
H
48 mm (1.9”);
W
96 mm (3.8”);
D
129 mm (5.0”)
Approvals
UL Listed (E340889), CSA,
RCM (Australia), CE
Warranty
5 years
Mounting
Panel; Surface and DIN (with optional
AC700-SMK)
Rev: 4-F-040716
Based on Manual Rev 6-F-031116
IEEE Device Numbers
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.
