EL731-02-00

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 CT1 A CT2 A A GROUNDED AC SUPPLY CT1 B GROUNDED C DC SUPPLY – EL731 SERIES L1 A + EL731 SERIES (AC/DC Sensitive Earth-Leakage Relay) L1 L2 (AC/DC Sensitive Earth-Leakage Relay) L2 AC Mode DC Mode For detailed wiring diagram, see adjacent page. Accessories Ordering Information ORDERING NUMBER CONTROL POWER COMMUNICATIONS EL731-00-X0 120/240 Vac/Vdc None EL731-01-X0 120/240 Vac/Vdc DeviceNet™ EL731-02-X0 120/240 Vac/Vdc Profibus® EL731-03-X0 120/240 Vac/Vdc EtherNet/IP™ EL731-04-X0 120/240 Vac/Vdc Modbus® TCP EL731-10-X0 48 Vdc & 24 Vac None EL731-11-X0 48 Vdc & 24 Vac DeviceNet™ EL731-12-X0 48 Vdc & 24 Vac Profibus® EL731-13-X0 48 Vdc & 24 Vac EtherNet/IP™ EL731-14-X0 48 Vdc & 24 Vac Modbus® TCP EL731-20-X0 24 Vdc None EL731-21-X0 24 Vdc DeviceNet™ EL731-22-X0 24 Vdc Profibus® EL731-23-X0 24 Vdc EtherNet/IP EL731-24-X0 24 Vdc Modbus® TCP A EFCT Series Earth-Fault Current Transformer Required zero-sequence current transformer specifically designed for low level detection. AC700-CUA Series Communication Adapter Optional network-interface and firmwareupgrade communications adapters field-install in EL731. AC700-SMK DIN-rail & Surface-mount Adapter EL731 plugs into adapter for back-plane mounting. ™ ACCESSORIES REQUIREMENT EFCT Series CT One Required AC700-CUA Series Com. Unit AC700-SMK Surface-Mount Kit Optional Optional AC700-CVR-00 Watertight Cover (IP66) for Panel-Mount Applications Optional PGA-0520 Analog Meter 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 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 LINE 1 Specifications OPTIONAL NETWORK COMM 14 L1 AC/DC SENSITIVE EARTH-LEAKAGE RELAY EL731 LINE 2/N L2/N 15 GND K1 20 FAULT 19 18 K2 21 22 23 K3 24 25 EFCT-X 11 S21 16 26 20-6000 HZ CT NC 17 10 S22 TC 5 TC RTD/PTC TB 4 TB TA 3 TA 9 SH2 EFCT-X 8 S11 7 S12 DC-90 HZ CT 13 RST TC ANALOG OUT TB TA 12 GND +– AB 2 4-20mA AA 1 RTD t˚ +t˚ SUPPLY 6 SH1 REMOTE RESET PTC PGA-0520 IEEE Device Numbers 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 mm2) 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) 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 Littelfuse.com/el731 Rev: 4-F-040716 Based on Manual Rev 6-F-031116 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Littelfuse: EL731-13-00 PGA-0520 EL731--00 EL731-20-00 EL731-22-00 EL731-10-00 EL731-04-00 EL731-24-00 EL73123-00 EL731-01-00 EL731-11-00 EL731-03-00 EL731-12-00 EL731-21-00 EL731-02-00 EL731-00-00 EL731-1400 EL731-21-10 EL731-22-10 EL731-02-10 EL731-14-10 EL731-23-10 EL731-10-10 EL731-20-10 EL731-24-10 EL731-00-10 EL731-11-10 EL731-03-10 EL731-04-10 EL731-01-10 EL731-13-10 EL731-12-10