EL731 Datasheet, PDF (1/2 Pages) Littelfuse – The EL731 is a microprocessor-based

Protection Relays and Controls
Earth-Leakage Protection–Grounded AC or DC Systems
EL731 SERIES
AC/DC Sensitive Earth-Leakage Relay
Simplified Circuit Diagram
A
GROUNDED
AC SUPPLY B
CT1 A CT2 A
C
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.
+
GROUNDED
DC SUPPLY ^–
CT1 A
L1
L2
AC Mode
EL731 SERIES
(AC/DC Sensitive
Earth-Leakage Relay)
L1
L2
DC Mode
EL731 SERIES
(AC/DC Sensitive
Earth-Leakage Relay)
For detailed wiring diagram, see adjacent page.
Ordering Information
ORDERING NUMBER
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
CONTROL
POWER
120/240 Vac/Vdc
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
24 Vdc
24 Vdc
24 Vdc
24 Vdc
COMMUNICATIONS
None
DeviceNet^™
Profibus^®
EtherNet/IP^™
Modbus^® TCP
None
DeviceNet^™
Profibus^®
EtherNet/IP^™
Modbus^® TCP
None
DeviceNet^™
Profibus^®
EtherNet/IP^™
Modbus^® TCP
Accessories
EFCT Series Earth-Fault Current
A
Transformer
Required zero-sequence current transformer
specifically designed for low level detection.
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
AC700-CUA Series Com. Unit
AC700-SMK Surface-Mount Kit
AC700-CVR-00 Watertight Cover (IP66) for
Panel-Mount Applications
PGA-0520 Analog Meter
REQUIREMENT
One Required
Optional
Optional
Optional
Optional
Note: When building a part number, replace the “X” with “1” for AS/NZS 2081:2011 Compliant product, “0” otherwise.
© 2016 Littelfuse Protection Relays & Controls
Littelfuse.com/el731
Rev: 4-F-040716
Based on Manual Rev 6-F-031116