EL731 SERIES AC/DC Sensitive Earth-Leakage Relay

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, Simplified Circuit Diagram and to dc circuits. CT1 A CT2 A A CT1 A GROUNDED + AC SUPPLY B GROUNDED C DC SUPPLY – EL731 SERIES EL731 SERIES L1 (AC/DC Sensitive (AC/DC Sensitive Earth-Leakage Relay) L1 Earth-Leakage Relay) L2 L2 AC Mode DC Mode For detailed wiring diagram, see adjacent page. Ordering Information Accessories EFCT Series Earth-Fault Current A ORDERING NUMBER CONTROL POWER COMMUNICATIONS Transformer Required zero-sequence current transformer EL731-00-X0 120/240 Vac/Vdc None specifically designed for low level detection. EL731-01-X0 120/240 Vac/Vdc DeviceNet™ AC700-CUA Series EL731-02-X0 120/240 Vac/Vdc Profibus® Communication Adapter EL731-03-X0 120/240 Vac/Vdc EtherNet/IP™ Optional network-interface and firmware- upgrade communications adapters field-install EL731-04-X0 120/240 Vac/Vdc Modbus® TCP in EL731. EL731-10-X0 48 Vdc & 24 Vac None EL731-11-X0 48 Vdc & 24 Vac DeviceNet™ AC700-SMK DIN-rail & Surface-mount Adapter EL731 plugs into adapter for back-plane EL731-12-X0 48 Vdc & 24 Vac Profibus® mounting. EL731-13-X0 48 Vdc & 24 Vac EtherNet/IP™ ACCESSORIES REQUIREMENT EL731-14-X0 48 Vdc & 24 Vac Modbus® TCP EFCT Series CT One Required EL731-20-X0 24 Vdc None AC700-CUA Series Com. Unit Optional EL731-21-X0 24 Vdc DeviceNet™ AC700-SMK Surface-Mount Kit Optional EL731-22-X0 24 Vdc Profibus® AC700-CVR-00 Watertight Cover (IP66) for Optional Panel-Mount Applications EL731-23-X0 24 Vdc EtherNet/IP™ PGA-0520 Analog Meter Optional EL731-24-X0 24 Vdc Modbus® TCP 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 Rev: 4-F-040716 Littelfuse.com/el731 Based on Manual Rev 6-F-031116

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) Adjustable trip setting provides a wide range of low-level protection and system coordination Frequency range (0-90 Hz, 20-6,000 Hz) Operate in either AC or DC mode or both. Use single or combined ranges. Separate metering 32-char OLED display Earth-leakage metering, setup and programming Local LED indication Visual Trip, Alarm, CT connection indication CT-Loop monitoring Alarms when CT is not connected Analog output (4-20 mA) Connect to DCS. Allows connection to an optional meter (PGA-0520) or control system Adjustable time delay Adjustable trip delay for quick protection and system coordination Alarm and trip settings Detect a deteriorating condition before damage occurs Temperature-sensor input Drive or motor temperature protection Output contacts 3 programmable: Operate 2 alarm and 1 trip circuit Network communication Optional connection to plant network Harmonic filtering Eliminates nuisance tripping due to harmonic noise Microprocessor based No required calibration saves maintenance cost Universal power supply Provides flexibility for numerous applications Wiring Diagram Specifications LINE 1 LINE 2/N IEEE Device Numbers AC ground fault (50G/N, 51G/N), OPTIONAL NETWORK DC ground fault (79G), COMM 14 L1 L2/N 15 PTC overtemperature (49), GND RTD temperature (38, 49) AC/DC SENSITIVE 16 EARTH-LEAKAGE RELAY Supply Voltage 120/240 Vac/Vdc, 24 Vdc, EL731 48 Vdc/24 Vac K1 20 Trip Level Settings 30-5,000 mA AC and DC 19 FAULT Alarm Level Settings 30-5,000 mA AC and DC 18 Trip Delay 0.05-2 s K2 21 Output Contacts 3 Form C (programmable) 22 23 Contact Operating Mode Fail-safe & non-fail-safe Reset Front panel and remote K3 24 Freq. Response, CT1 0-90 Hz 25 Freq. Response, CT2 20-6,000, 190-6,000, 20-90, 20-3,000 Hz; 26 selectable 11 S21 EFCT-X 20-6000 HZ CT NC 17 Current Transformer EFCT-x series 10 S22 PTC RTD CT Detection Open & short detection 9 SH2 TC 5 TC TC Terminals Plug-in, wire clamping, t˚ RTD/PTC TB 4 TB +t˚ TB 24 to 12 AWG (0.2-2.5 mm2) 8 S11 Communications EtherNet/IP™, DeviceNet™, Profibus®, EFCT-X DC-90 HZ CT TA 3 TA TA ® 7 S12 Modbus TCP (optional) SH1 SUPPLY Analog Output 4-20 mA (selectable 0-5 A or 6 AB 2 + – 0-100% trip-level setting) ANALOG 4-20mA PGA-0520 OUT Conformal Coating Standard feature 13 RST REMOTE AA 1 Dimensions H 48 mm (1.9”); W 96 mm (3.8”); RESET 12 GND 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) 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. © 2016 Littelfuse Protection Relays & Controls Rev: 4-F-040716 Littelfuse.com/el731 Based on Manual Rev 6-F-031116