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EL731 manual ac/dc sensitive earth-leakage relay february 28, 2012 revision 2 copyright ? 2012 by littelfuse startco all rights reserved. publication: EL731 document: s95-p401-00001 printed in canada. www.datasheet.co.kr datasheet pdf - http://www..net/
pub. EL731, february 28, 2012 factory default password is 1111 new password see section 3.2.4. www.datasheet.co.kr datasheet pdf - http://www..net/
page i EL731 ac/dc sensitive earth-leakage relay rev. 2 pub. EL731, february 28, 2012 t able of c ontents p age 1. introduction ................................................................... 1 1.1 general .................................................................... 1 1.2 EL731 features ....................................................... 1 1.2.1 metering.......................................................... 1 1.2.2 data logging .................................................. 1 1.2.3 inputs and outputs ......................................... 1 1.2.4 operator interface .......................................... 1 1.2.5 communications interface ............................. 1 2. installation ..................................................................... 2 2.1 system wiring ......................................................... 2 2.1.1 supply voltage ............................................... 2 2.1.2 current transformer connections ................. 2 2.1.3 analog output ................................................ 2 2.1.4 ptc or rtd input .......................................... 2 2.1.5 ethernet/ip communications (optional) ....... 2 2.1.6 remote reset .................................................. 2 2.1.7 relay outputs ................................................. 2 2.2 calibration ............................................................... 2 3. operation and setup .................................................... 7 3.1 display and indication ............................................ 7 3.1.1 front-panel led indication .......................... 7 3.1.1.1 trip ........................................................ 7 3.1.1.2 ct status ............................................... 7 3.1.1.3 alarm ..................................................... 7 3.1.2 ethernet/ip module led indication ............. 7 3.2 main menus ............................................................ 8 3.2.1 metering.......................................................... 8 3.2.2 messages ......................................................... 8 3.2.3 setup ............................................................... 8 3.2.3.1 earth-fault-ct input ............................ 8 3.2.3.2 temperature protection......................... 8 3.2.3.3 output relay assignments ................... 8 3.2.3.4 analog output ....................................... 8 3.2.3.5 miscellane ous configuration ................ 9 3.2.3.5.1 password .................................... 9 3.2.3.5.2 menu timeout ........................... 9 3.2.3.5.3 maintenance .............................. 9 3.2.4 password ......................................................... 9 3.3 trip reset ................................................................ 9 4. theory of operation ................................................... 13 4.1 ct1 theory of operation ..................................... 13 4.2 ct2 theory of operation ..................................... 13 5. personal computer interface .................................... 13 5.1 flash memory update .......................................... 13 6. technical specifications ............................................. 14 6.1 EL731 .................................................................... 14 6.2 current sensors ..................................................... 15 7. ordering information ................................................ 15 8. warranty ..................................................................... 15 9. performance test ........................................................ 16 10. appendix a .................................................................. 18 11. appendix b .................................................................. 20 l ist of f igures p age 1 EL731 outline and mounting details ........................... 3 2 ac700-smk outline and mounting details ................ 4 3. panel and surface mounting connections .................... 4 4. connection diagram ...................................................... 5 5. EL731 with installed anybus communications module (ac-700-cua-0x)................................................. 6 6. EL731 with installed firmware upgrade module (ac-700-cua-00). ............................................................... 6 7. efct-1 outline and mounting details ....................... 10 8. efct-2 outline and mounting details ....................... 11 9. efct-26 outline a nd mounting details ..................... 12 10. earth-fault-test circuit ............................................... 16 l ist of t ables p age 1. trip flash codes ............................................................ 7 2. network status led (ns) ............................................. 7 3. module status led (ms) .............................................. 7 4. link/activity led (link) ............................................ 7 5. ct2 input filters ............................................................ 8 6. relay functions .............................................................. 8 7. earth-fault-test record ............................................... 16 d isclaimer specifications are subject to change without notice. littelfuse startco is not liable for contingent or consequential damages, or for expenses sustained as a result of incorrect application, incorrect adjustment, or a malfunction. www.datasheet.co.kr datasheet pdf - http://www..net/
page ii EL731 ac/dc sensitive earth-leakage relay rev. 2 pub. EL731, february 28, 2012 this page intentionally left blank . www.datasheet.co.kr datasheet pdf - http://www..net/
page 1 EL731 ac/dc sensitive earth-leakage relay rev. 2 pub. EL731, february 28, 2012 1 i ntroduction 1.1 g eneral the EL731 is a microproc essor-based earth-leakage relay for ac, dc, combined ac/dc, and variable- frequency power circuits supplied by solidly or resistance-grounded systems th at require earth-leakage detection as low as 30 ma. earth-leakage metering and two setting levels (alarm and trip) are provided. a temperature-sensor input provides metering and protection for a motor or drive. it is uniquely suited for sensitive earth-fault protection for adjustable-speed drive (asd) circuits that ofte n operate at low speeds. settings and configuration selections provide frequency-response ranges of 0 to 90 hz, 20 to 90 hz, 190 to 15,000 hz, 20 to 15,000 hz, and 0 to 15,000 hz. in each case, alarm- and trip-setting ranges are 30 to 5,000 ma. three output relays with normally closed and normally open contacts can be programmed for various functions and can be set to operate in the fail-safe or non-fail-safe mode for undervoltage or shunt-trip applications. additional features include a 2 x 16-character oled display, current and temperature metering, programming and menu-navigation push buttons, password security, led trip and alarm indication, auto-reset alarms and latching trips with front-pane l and remote reset, trip memory, 4- to 20-ma analog output, ct verification with led indication, and c onformal coated circuits. earth-leakage current is sensed by one or two efct- series core-balance zero-sequence current transformers. the trip level range of the earth-leakage circuit is 30 to 5,000 ma. with two ct?s connected, the EL731 performs independent metering. trip-time delay is configurable from instantaneous to two seconds in millisecond increments. an optional ethernet/ip communications interface is available. contact the f actory for other communication interface options. 1.2 EL731 f eatures ? ac ground overcurrent (50g/51g) ? dc ground overcurrent (79g) ? ptc overtemperature (49) ? rtd temperature (38, 49) 1.2.1 m etering ? earth-leakage current ? rtd temperature or ptc overtemperature 1.2.2 d ata l ogging ? trip counters ? alarm counters 1.2.3 i nputs and o utputs ? ac earth-leakage current transformer (ct2) ? ac/dc earth-leakage curr ent transformer (ct1) ? remote reset input (one shot operation) ? network communications (ethernet/ip ? optional) ? 4-20-ma analog output (programmable, loop powered) ? temperature-sensor input (rtd or ptc) ? three output relays, programmable 1.2.4 o perator i nterface ? 2 x 16 oled display ? display control and programming keys ? led status indication 1.2.5 c ommunications i nterface an optional ethernet/ip interface is available. an optional update adapter is available for firmware updates. for ordering information, see section 7. www.datasheet.co.kr datasheet pdf - http://www..net/
page 2 EL731 ac/dc sensitive earth-leakage relay rev. 2 pub. EL731, february 28, 2012 2. i nstallation outline and details for panel-mounting an EL731 are shown in fig. 1. insert the EL731 through the cutout and slip the panel-mount clamp over the EL731 body. slide the panel-mount clamp forward to engage the latch tabs with the mating body retainer grooves. lock the unit in place by tightening the four clamp screws against the panel. note: do not over tighten the clamp screws as this might deform the clamp and release the latch tabs. outline and details for surface-mounting the EL731 are shown in figs. 2. a detailed instruction sheet is included with the optional ac700-smk surface- mounting hardware kit. 2.1 s ystem w iring a typical connection diagram for the EL731 is shown in fig. 4 and terminal-layout diagrams are shown in fig. 3. 2.1.1 s upply v oltage provide supply voltage from the line side of the controller or from an independent source. connect supply voltage to terminals 14 and 15 (l1, l2/n) as shown in fig. 4. in 120-vac systems, l2/n is designated as the neutral conductor. for direct-current power supplies, use l1 for the positive terminal and l2/n as the negative terminal. connect terminal 16 ( ) to ground. 2.1.2 c urrent t ransformer c onnections this earth-leakage relaying system consists of an EL731 earth-leakage relay and one or two efct-series current sensors connected as shown in fig. 4. the system can use ct1 or ct2 individually or combined. pass the phase conductors through the ct window(s) and position them in the centre of the opening (for 4-wire and single-phase systems, also pass the neutral conductor through the ct window). do not pass earth conductors through the ct window. in applications that require shields or drain wires to pass through the ct window, return them through the ct window before connecting them to earth. using shielded twisted-pair cable, connect ct1 to terminals 8 and 7 and connect the shield to terminal 6. current-sensor connections are not polarity sensitive. see figs. 7, 8 and 9 for current-sensor dimensional drawings. each efct-series sensor includes 6 m (19.2?) cable. using shielded twisted-pair cable, connect ct2 to terminals 11 and 10, connect the shield to terminal 9. current-sensor connections are not polarity sensitive. see figs. 7, 8 and 9 for current-sensor dimensional drawings. each efct-series sensor includes 6 m (19.2?) cable. 2.1.3 a nalog o utput the 4-20-ma analog output is loop powered. the connection is shown in fig. 4. the analog output is isolated to 120 vac from all other EL731 terminals. 2.1.4 ptc or rtd i nput the temperature-sensor input can be configured for either rtd or ptc operation. connect as shown in fig. 4. select the sensor type in the setup | hardware | temp sensor menu 2.1.5 e thernet /ip c ommunications (o ptional ) the EL731 supports an ethernet/ip communications interface. the communications interface module installs through the side of the enclosure as shown in fig. 5. to field-install an ac-700-cua communications upgrade adapter, remove the supply voltage, remove the adapter access cover, insert the adapter, and retain with the supplied screws. apply the supply voltage. with the communications module installed, a standard rj45 network cable can be used to connect the EL731 to an ethernet/ip network. configure the interface using the ip config software available at www.startco.ca. the software requires microsoft windows operating system. the ethernet interface suppor ts 10/100-mbit, full- or half-duplex operation. 2.1.6 r emote r eset if required, connect a normally open switch to the remote-reset input (terminals 12 & 13) as shown in fig. 4. 2.1.7 r elay o utputs the EL731 has three programmable form-c relay outputs. program choices are trip, alarm, watchdog or current detected. s ee section 3.2.3.3. 2.2 c alibration if the low-frequency ct1 input is used, the EL731 must be calibrated in order to ensure an accurate current measurement. to calibrate, connect an efct-series current sensor to the EL731 and ensure that no ct-primary current is present. apply EL731 supply voltage and navigate to menu item setup | protection | ct1 earth fault | calibrate. press enter to begin the calibration process. the ct led will flash, during the calibration process, which takes about 30 seconds. if the ct is ever replaced, this procedure must be repeated to maintain cu rrent-measurement accuracy. www.datasheet.co.kr datasheet pdf - http://www..net/
page 3 EL731 ac/dc sensitive earth-leakage relay rev. 2 pub. EL731, february 28, 2012 48.0 (1.89) 96.0 (3.78) 91.5 (3.60) front top panel thickness 1.6 (0.06) to 4.8 (0.19) notes : side 43.5 (1.71) 119.0 max (4.68) 10.0 (0.39) 1. dimensions in millimetres (inches). rear panel cutout detail 92.0 (3.62) 44.0 (1.73) r=4.8 (0.19) maximum 100.0 minimum (3.94) 50.0 minimum (1.97) 1 13 2 3 4 5 6 7 8 9 10 11 12 14 15 16 17 18 19 20 21 22 23 24 25 26 communications adaptor access cover clamp retainer grooves panel-mount clamp figure 1. EL731 outline and mounting details. www.datasheet.co.kr datasheet pdf - http://www..net/
page 4 EL731 ac/dc sensitive earth-leakage relay rev. 2 pub. EL731, february 28, 2012 mounting detail bottom view front view side view 60.0 (2.36) 112.0 (4.41) 100.0 (3.94) m4 or 8-32 tap 12.0 (0.47) 81.2 (3.20) 21.2 (0.83) 112.0 (4.41) 81.2 (3.20) 125.4 (4.94) 121.9 (4.80) 100.0 (3.94) 60.0 (2.36) 81.2 (3.20) m4 or 8-32 tap 4 locations cable-tie eyelet 4 locations notes: 1. dimensions in millimetres (inches). 2. side view shown with 35 mm x 7.5 mm top-hat rail. figure 2. ac700-smk outline and mounting details. 1 13 2 3 4 5 6 7 8 9 10 11 12 14 15 16 17 18 19 20 21 22 23 24 25 26 14 15 16 17 18 19 20 21 22 23 24 25 26 14 15 16 17 18 19 20 21 22 23 24 25 26 1 2 3 4 56 7 891011 12 13 l1 l2/n nc k1 k2 k3 power relay 1 relay 2 relay 3 power relay 1 relay 2 relay 3 analog out rtd / ptc ct1 ct2 remote reset aa ab ta tb tc sh1 s12 s11 sh2 s22 s21 gnd rst l1 l2/n nc k1 k2 k3 panel mounted surface mounted 1 2 3 4 5 6 7 8 9 10 11 12 13 aa ab ta tb tc sh1 s12 s11 sh2 s22 s21 gnd rst analog out rtd / ptc ct1 ct2 remote reset 12 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 figure 3. panel and surface mounting connections www.datasheet.co.kr datasheet pdf - http://www..net/
page 5 EL731 ac/dc sensitive earth-leakage relay rev. 2 pub. EL731, february 28, 2012 EL731 remote reset 4-20 ma 14 k1 k2 k3 s21 s22 sh2 l1 19 22 25 11 10 9 s11 s12 sh1 7 8 6 rst gnd 13 12 optional network communications line 1 dc-90 hz ct 20-15000 hz ct l2/n 15 16 20 18 c fault 21 23 24 26 line 2/n 17 5 4 3 nc tc tb ta rtd/ptc 2 ab 1 aa analog out + t o tc tb ta tc tb ta ptc rtd t o ct2 ct1 supply + - termination note 1 notes: 1. ct connections are not polarity sensitive. figure 4. connection diagram. www.datasheet.co.kr datasheet pdf - http://www..net/
page 6 EL731 ac/dc sensitive earth-leakage relay rev. 2 pub. EL731, february 28, 2012 figure 5. EL731 with installed anybus communications module (ac-700-cua-03). figure 6. EL731 with firmware upgrade module (ac-700-cua-00). www.datasheet.co.kr datasheet pdf - http://www..net/
page 7 EL731 ac/dc sensitive earth-leakage relay rev. 2 pub. EL731, february 28, 2012 3. o peration and s etup 3.1 d isplay and i ndication the EL731 front panel has three led?s, a 2-line x 16-character alphanumeric oled display and four push buttons to navigate through programming, status, and system-information menus. the display will revert to screen-saver mode after 15 minutes. press any key to exit the screen saver. the reset key is used to clear an earth-leakage-fault or overtemperature trip. the fault condition must no longer be present to allow a reset. continually pressing the reset key will not prevent a trip. the up and down arrow keys ( ) are used to navigate the menu system. the enter key is used to select menu items and to choose settings. all EL731 settings can be accessed using the EL731 menu system or the optional network communications interface. in the following sections, menu items and setup parameters are listed in italics and are shown in the format displayed on the oled display. menu selection is in the following format: menu 1 | sub menu 1 | sub menu 2 | sub menu 3 |? when browsing a selection list, an asterisk (*) indicates the active item. if the intent is to exit the list and not to change the setting, press enter on the selection that has the asterisk (*). if the item is a string (or numerical) input and no change is desired, press enter until the display returns to the menu system. to exit a main-menu list, scroll and select exit . a menu map is provided in appendix a at the end of this manual. 3.1.1 f ront- p anel led i ndication 3.1.1.1 t rip the red led labeled trip indicates a trip condition when flashing. refer to table 1 for applicable flash codes. table 1: t rip f lash c odes f ault c odes overcurrent ct1 1 short, 1 long overcurrent ct2 2 short, 1 long ct1 detection 3 short, 1 long ct2 detection 4 short, 1 long nvram error 5 short, 1 long ct1 calibration failure 6 short, 1 long rtd/ptc trip 7 short, 1 long user test 8 short, 1 long watchdog fast flash trip cause is also available on the oled display through the | messages | state menu item. 3.1.1.2 ct s tatus the green led labeled ct will flash during ct1 calibration. it will be solid gr een when ct connections are correct, and off when a ct is connected incorrectly. 3.1.1.3 a larm the yellow led labeled alarm will be on when measured current is ab ove an alarm setting. 3.1.2 e thernet /ip m odule led i ndication there are three led? s on the optional ac700-cua-03 ethernet/ip communications module. their purpose and indication are shown in tables 2, 3, and 4. table 2: n etwork s tatus led (ns) led s tate d escription off no power or no ip address green on-line, one or more connections established green, flashing on-line, no connections established red duplicate ip address, fatal error red, flashing one or more connections timed out table 3: m odule s tatus led (ms) led s tate d escription off no power green controlled by a scanner in run state green, flashing not configured, or scanner in idle state red major fault (exception- state, fatal error) red, flashing recoverable fault(s) table 4: l ink /a ctivity led (link) led s tate d escription off no link, no activity green link established green, flickering activity www.datasheet.co.kr datasheet pdf - http://www..net/
page 8 EL731 ac/dc sensitive earth-leakage relay rev. 2 pub. EL731, february 28, 2012 3.2 m ain m enus the ?top? menu item (select exit in the main menu) displays earth-leakage current(s ) as a numeric percent of full scale (5a) and as a bar graph. 3.2.1 m etering menu: metering with metering selected in the main menu, press the enter key to display a list of metering options. use the up and down arrow keys to scroll through the options list. press the enter key to display the selected information. information available: ct1 primary current (ma), ct2 primary current (ma) , combined ct1 and ct2 current (ma), internal EL731 temperature (c and f), ptc status, and rtd temperature (c and f). 3.2.2 m essages menu: messages selecting this menu item allows the trip state, alarm state, trip counter, alarm counter, and EL731 running time to be viewed. 3.2.3 s etup see appendix b for a setup summary and setting record. 3.2.3.1 e arth- f ault p rotection menu: setup | protection | ctx earth fault the earth fault enable/disable menu enables or disables current monitoring through the selected ct input. when enabled, the system ch ecks to ensure the ct is connected properly. a trip will occur if an efct is not connected. see section 3.1.1.1. the trip time menu sets the trip delay. the range for this menu item is 0 ? 2 seconds in millisecond increments where 0 indicates that as soon as current is detected above the trip level, a trip occurs. the trip level menu sets the trip level. the setting range is 30 ma to 5 a. the alarm level setting range is the same as the trip level range. trips are latched, requiring a local or remote reset input, and alarms auto- reset. the calibrate menu applies to ct1 (0 to 100 hz). when ct1 is used, the EL731 must be calibrated after installation, with ct1 connected and power removed from the load. the ct led flashes during calibration. the input filter menu applies to ct2 (20 to 15,000 hz) and allows selection of different input filters. the available filters and their descriptions are shown in table 5. table 5: ct2 i nput f ilters f ilter f requency r esponse no filter 20 hz to 15 khz low pass filter at 90hz 20 to 90 hz high pass filter at 190hz 190 hz to 15 khz for full-spectrum protection, use ct1 and ct2 and select the high pass filter to avoid frequency overlap between the inputs. 3.2.3.2 t emperature p rotection menu: setup | protection | ptc local temp menu: setup | protection | rtd local temp menu: setup | hardware | temp sensor the temperature-sensor input, at terminals 3, 4, and 5, can be configured as a ptc thermistor or a 100-ohm- platinum rtd (or disabled) in the setup | hardware | temp sensor menu . ptc overtemperature alarm and trip actions can be selected in the setup | protection | ptc temperature menu, or alarm and trip temperature settings and actions can be programmed in the setup | protection | rtd temperature menu . 3.2.3.3 o utput r elay a ssignments menu: setup | relay outputs | relay x each of the three output relays can be assigned to one of the functions listed in table 6. more than one relay can be assigned the same function. the default assignments are trip (fail-safe) for relay 1, alarm (fail-safe) for relay 2, and watchdog for relay 3. table 6: r elay f unctions f unction a ssignment or a ction trip relay operates when a trip occurs. fail-safe or non-fail-safe mode selection is active. alarm relay operates when an alarm occurs. fail-safe or non-fail-safe mode selection is active. watchdog relay is energized when the supply voltage is applied and the EL731 is operating properly. current relay is energized when current is detected the fail-safe mode setting for each relay allows the individual relay to be configured as fail-safe (normally energized) or non-fail-safe (normally de-energized). the test function performs a test of the specified relay?s operation. 3.2.3.4 a nalog o utput menu: setup | analog output a 4-20 ma programmable current output is provided. analog % level enables the output to be configured such that 20 ma corresponds to full scale of the selected ct (5 a) or corresponds to the trip level for the selected ct. ct select selects which ct measurement will be represented by the analog output. the selections are ct1 , ct2 , or both. www.datasheet.co.kr datasheet pdf - http://www..net/
page 9 EL731 ac/dc sensitive earth-leakage relay rev. 2 pub. EL731, february 28, 2012 3.2.3.5 m iscellaneous c onfiguration menu: setup | system config used to access additional system configuration elements described in the following sections. 3.2.3.5.1 p assword menu: setup | system config | change password menu: setup | system config | password enable used to enable and change the EL731 password (four- character numeric field). when enabled, the password must be entered to change a set point. the default password is 1111. 3.2.3.5.2 m enu t imeout used to set the time before the system times out due to lack of activity and the menu system returns to the main menu display (see section 3.2). in password mode the password entered will be cleared. the timeout is measured from the last key press. 3.2.3.5.3 m aintenance used to clear trip and al arm counters, load defaults, restart the system, and display the firmware version, build date, and serial number. 3.2.4 p assword menu: password with password security active, all set points are locked. to enable programming, the password must be entered through the password menu. while navigating through the menus when a valid password has been entered, an asterisk (*) is shown at the beginning of the first line of the display. 3.3 t rip r eset the reset button will clear a trip when pressed for two and a half seconds. the trip will only clear if the fault is no longer present. keeping reset pressed will not prevent an alarm or trip. if password is enabled, reset will not function until the password has been entered. www.datasheet.co.kr datasheet pdf - http://www..net/
page 10 EL731 ac/dc sensitive earth-leakage relay rev. 2 pub. EL731, february 28, 2012 s 1 s 2 p 1 lr 53428 us c r r 121.0 (4.76) 20.5 (0.81) m5 screws 30.0 (1.18) 56.0 (2.21) 46.0 (1.81) 121.0 (4.76) 80.0 (3.15) note 2 mounting detail top 25.0 (0.98) 82.0 (3.23) 69.8 (2.75) efct - 1fc flux conditioner (optional) 138.0 max (5.43) 5.5 (0.22) 110.0 (4.33) 5.5 (0.22) 22.0 (0.87) 5.0 (0.20) ? recessed for 8-mm hex nut 1.0 (0.04) deep front notes: 1. dimensions in millimetres (inches). 2. mounting screws: m4 or 8-32. 3. press mounting feet in place using installation tool provided. 30.0 (1.18) side 56.0 (2.21) 126.0 (4.96) efct-1 earth fault ct 600 v class, insulation class a figure 7. efct-1 outline and mounting details. www.datasheet.co.kr datasheet pdf - http://www..net/
page 11 EL731 ac/dc sensitive earth-leakage relay rev. 2 pub. EL731, february 28, 2012 p p ss 2 2 1 1 s p 1 1 lr 53428 us c r efct-2 eart h f ault ct 600 v class, insulation class a r 215.0 (8.46) 64.0 (2.52) 31.0 (1.22) m5 screws top mounting detail 52.3 (2.06) 215.0 (8.46) 162.0 (6.38) m5 or 10-32 tap 26.5 (1.04) 25.0 (0.98) 236 max (9.29) 139.7 (5.50) flux conditioner (included) bonding screw 5.0 (0.20) dia 8.5 (0.33) 8.5 (0.33) side 31.0 (1.22) 198.0 (7.80) 60.0 (2.36) front notes: 1. dimensions in millimetres (inches) 2. mounting screws: m5 or 10-32. 215.0 (8.46) figure 8. efct-2 outline and mounting details. www.datasheet.co.kr datasheet pdf - http://www..net/
page 12 EL731 ac/dc sensitive earth-leakage relay rev. 2 pub. EL731, february 28, 2012 p p ss 2 2 1 1 26.5 (1.04) 68.0 (2.68) 17.0 (0.67) m5 screws top 68.0 (2.68) 34.0 (1.34) 52.5 (2.07) 42.6 (1.68) m4 or 8-32 tap mounting detail 25.0 (0.98) 110.0 max (0.43) 72.0 (2.83) 34.0 (1.34) 26.0 (1.02) 58.0 (2.28) 5.0 (0.20) 5.0 (0.20) 7. 0 (0.87) 4.0 (0.16) ? recessed for 7-mm hex nut 3.0 (0.12) deep front 26.5 (1.04) 52.5 (2.07) side mounting foot installation tool detail ?a? notes: 1. dimensions in millimetres (inches). 2. press mounting feet in place using installation tool provided (detail ?a?) 3. mounting screws: m4 or 8-32. lr 53428 us c r r efct-1 earth fault ct 600 v class, insulation class a figure 9 efct-26 outline and mounting details. www.datasheet.co.kr datasheet pdf - http://www..net/
page 13 EL731 ac/dc sensitive earth-leakage relay rev. 2 pub. EL731, february 28, 2012 4 . t heory of o peration ct1 and ct2 have independent trip and alarm current-level and time-delay set points and independent metering. this enables different protection levels and separate metering for the high- and low-frequency ranges. full-current metering, summing ct1 and ct2 metering, is provided as an oled metering selection, an analog output selection, and in optional network communications. to improve full-current-metering accuracy by avoiding band overlap, select the ct2 high- pass filter. 4.1 ct1 t heory of o peration the EL731 applies a known signal to the secondary winding of the efct-series sensor connected to input ct1. current flowing in th e efct primary affects this signal, and its magnitude can be accurately measured across a wide frequency range. the EL731 can measure current as low as 30 ma in a frequency range of 0 to 90 hz. open and short efct connections are detected. 4.2 ct2 t heory of o peration ct2 is a core-balance zero-sequence current- transformer application, with digital filtering to enable a wide spectrum of analysis. there are three digital-filter ranges: full range, low pass, and high pass. ct2 includes detection of open or short efct-series current sensor wiring. 4.2.1 ct2 f ull r ange f ilter the full range frequency selection configures the EL731 to respond to the en tire frequency spectrum that ct2 is capable of monitoring ? 20 to 15,000hz. 4.2.2 ct2 l ow p ass f ilter the low pass frequency selection configures the EL731to respond to only the low end of its frequency range ? 20 to 90 hz. 4.2.3 ct2 h igh p ass f ilter the high pass frequency selection configures the EL731to respond to only the high end of its frequency range ? 190 to 15,000 hz. 5. p ersonal c omputer i nterface 5.1 f lash m emory u pdate the EL731 control program is stored in flash memory. this allows field upgrades to be made through the upgrade module (optional). the following are required: ? a windows pc with a usb interface and the se-flash program installed. se-flash is available at www.startco.ca. ? a file containing the EL731 code (.s19 file) ? a usb cable or tia232 through ca-945 converter with ethernet cable. ? an ac700-cua-00 upgrade module www.datasheet.co.kr datasheet pdf - http://www..net/
page 14 EL731 ac/dc sensitive earth-leakage relay rev. 2 pub. EL731, february 28, 2012 6. t echnical s pecifications 6.1 EL731 supply: option 0 ................................. 13 va, 120 to 240 vac (+10, -45%) 50/60 hz; 7 w, 100 to 250 vdc (+10, -25%) option 1 ................................. 7 w, 32 to 60 vdc (+20, - 25%) 9 va, 24 to 44 vac (10%), 50/60 hz option 2 ................................. 7 w, 16 to 30 vdc (+20, -25%) dc and low frequency (current transformer 1) frequency response ........... dc to 90 hz measurement method ......... true rms detection method ............... ct driven oscillator trip-level setting .............. 30 to 5,000 ma alarm-level setting ........... 30 to 5,000 ma trip-time settings ............. 0 to 2 s trip accuracies: trip level ....................... -10% at 60 hz time delay .................... - 5% (minimum of 35 ms at 60 hz) ct ...................................... efct series thermal withstand continuous ...................... 25 a earth-fault current 1 second ........................... 400 a earth-fault current detection ............................ ct open & short ac/carrier (current transformer 2) frequency response: filter 1 ............................. 20 to 15,000 hz filter 2 ............................. 20 to 90 hz filter 3 ............................. 190 to 15,000 hz measurement method ......... true rms detection ............................ ct open & short trip-level setting .............. 30 to 5,000 ma alarm-level setting ........... 30 to 5,000 ma trip time settings .............. 0 to 2 s trip accuracies: trip-level ......................... -10% at 60 hz trip-time ......................... - 5% (minimum 25 ms at 60 hz) ct ...................................... efct series thermal withstand continuous ...................... 25 a earth-fault current 1 second ........................... 400 a earth-fault current output relays: relay 1: contact configuration ......n.o. and n.c. operating mode ...............fa il-safe/non-fail-safe csa/ul rating ...............8 a resistive, 250 vac, 8 a resistive, 30 vdc supplemental contact ratings make/carry 0.2 s ........ 30 a rating code ................ b300 break: dc ........................ 50 w resistive, 150 vdc ac ........................ 2500 va (pf=1.0) 360 va (pf=0.4) subject to maximums of 8 a and 250 v (ac or dc) relays 2 & 3: contact configuration ......n.o. and n.c. operating mode ...............fa il-safe/non-fail-safe csa/ul rating ...............5 a resistive, 250 vac, 5 a resistive, 30 vdc supplemental contact ratings make/carry 0.2 s ........ 30 a rating code ................ b300, r300 break: dc ........................ 28 w resistive ac ........................ 1500 va (pf=1.0) 360 va (pf=0.4) subject to maximums of 5 a and 250 v (ac or dc) terminals ...................................wire clamping, 24 to 12 awg (0.2 to 2.5 mm 2 ) conductors 4?20 ma-analog output: type .......................................... loop powered range ........................................ 4 to 22 ma full scale (20 ma) ................... 5 a primary loop voltage ............................ 8 to 26 vdc load .......................................... 500 ? (maximum with 24-vdc supply) isolation .................................... 120 vac parameter .................................. ct1, ct2, or combined current communication options network protocol ...............ethernet/ip display type .............................2x16 oled dimensions: (body) height ..............................44 mm (1.7?) width ...............................92 mm (3.6?) depth ...............................100 mm (3.9?) dimensions: (bezel) height ..............................48 mm (1.9?) width ...............................96 mm (3.8?) projecti on .........................13. 7 mm (0.54?) shipping weight ........................0.45 kg (1 lb) www.datasheet.co.kr datasheet pdf - http://www..net/
page 15 EL731 ac/dc sensitive earth-leakage relay rev. 2 pub. EL731, february 28, 2012 ptc-thermistor input: cold resistance ................ 1500 ? maximum at 20 ? c trip level ......................... 2800 ? 100 ? reset level ....................... 1500 ? ? 100 ? sensor current .................. 1 ma maximum rtd input: rtd type ......................... 3 wire pt100 range ................................. -40 to 200 ? c with open and short detection sensor current ................... 1 ma lead compensation ........... 25 ? maximum accuracy ............................ 3 ? c environment: operating temperature ...... -40 to 60 ? c storage temperature .......... -55 to 80 ? c humidity ............................ 85 % non-condensing pwb conformal coating .......... mil-1-46058 qualified ul qmju2 recognized certification .............................. csa lr 53428 us c r ul listed csa c22.2 no.14 industrial control equipment ul 508 industrial control equipment ul 1053 ground fault sensing and relaying equipment surge withstand ......................... ansi/ieee c37.90.1-2002 (oscillatory and fast transient) 6.2 c urrent s ensors efct-1: current ratio ....................... 5:0.05 a insulation ............................. 600-v class window diameter ............... 82 mm (3.2") shipping weight .................. 900 g (2.0 lb) efct-2 current ratio ....................... 5:0.05 a insulation ............................. 600-v class window diameter ............... 139.7 mm (5.5") shipping weight .................. tbd efct-26 current ratio ....................... 5:0.05 a insulation ............................. 600-v class window diameter ............... 26 mm (1.0") shipping weight .................. 450 g (1.0 lb) 7. o rdering i nformation - EL731- communications: 0= none 3= ethernet/ip supply: 0 ? universal ac/dc supply 1 ? 48vdc/24vac supply 2 ? 24vdc supply 00 future use efct-1 ........... earth-fault current transformer, 82-mm (3.2?) window efct-2 ........... earth-fault current transformer, with flux conditioner 139-mm (5.5?) window efct-26 .......... earth-fault current transformer, 26-mm (1.0?) window efct-1fc ....... flux conditioner, 70 mm (2.7?) window pga-0500 ........ analog percent current meter ac700-smk .... din rail and surface-mount adapter ac700-cua-0 communications upgrade adapter adapter type 0 ? firmware upgrade module 3 ? ethernet/ip 8. w arranty the EL731 earth-leakage relay is warranted to be free from defects in material and workmanship for a period of 5 years from the date of purchase. littelfuse startco will (at littelfuse startco?s option) repair, replace, or refund the original purchase price of an EL731 that is determined by littelfuse startco to be defective if it is returned to the factory, freight prepaid, within the warranty period. this warranty does not apply to repairs required as a result of misuse, negligence, an accident, improper installation, tampering, or insufficient care. littelfuse startco does not warrant products repaired or modified by non-littelfuse startco personnel. www.datasheet.co.kr datasheet pdf - http://www..net/
page 16 EL731 ac/dc sensitive earth-leakage relay rev. 2 pub. EL731, february 28, 2012 9. p erformance t est some jurisdictions require periodic earth-fault performance tests. a test record form is provided for recording the date and the resu lt of the performance tests. the following earth-fault system tests are to be conducted by qua lified personnel. a) evaluate the interconnect ed system in accordance with the overall equipment manufacturer?s detailed instructions. b) verify proper location of the efct current sensors. ensure the cables pass through the current-sensor window. this check can be done visually with knowledge of the circuit. the connection of the current-sensor secondary to the EL731 is not polarity sensitive. c) verify that the system is correctly earthed and that alternate earth paths do not exist that bypass the current sensor. high-voltage testers and resistance bridges can be used to determine the existence of alternate earth paths. d) verify proper reaction of the circuit-interrupting device in response to a simulated or controlled earth- fault current. to simulate earth-fault current, use ct- primary current injection. fi g. 10 shows a test circuit using an se-400 ground-fault-relay test unit. the se-400 has a programmable output of 0.5 to 9.9 a for a duration of 0.1 to 9.9 seconds. fig. 10 shows the use of resistors that redu ce the injected current to 10% of the se-400 setting. set the test current to 120% of the EL731 setting. inject the test current through the current-sensor window. verify that the circuit under test has react ed properly. correct any problems and re-test until the proper reaction is verified. e) record the date and the results of the test on the attached test-record form. note: do not inject test current directly into current- sensor-input terminals 10 and 11. i test from power source efct-x load 11 10 s21 s22 14 15 l1 l2/n r1 l n r2 12 11 op2 op1 3 5 1 l l1 l2 n rmt1 rmt2 8 9 remote test r1 = 10 , 10 w, 1% r2 = 0.1 , 10 w, 1% i test = 1/10 se-400 setting EL731 se-400 8 7 s11 s12 efct-x figure 10. earth-fault-test circuit. table 7. e arth- f ault- t est r ecord d ate t est r esults retain this record for the authority having jurisdiction. www.datasheet.co.kr datasheet pdf - http://www..net/
page 17 EL731 ac/dc sensitive earth-leakage relay rev. 2 pub. EL731, february 28, 2012 this page intentionally left blank. www.datasheet.co.kr datasheet pdf - http://www..net/
page 18 EL731 ac/dc sensitive earth-leakage relay rev. 2 menu level 1 2 3 4 5 6 pub. EL731, february 28, 2012 a ppendix a EL731 m enu m ap earth leakage current ? {ct1 and/or ct2 current in percent as value and bar graph} metering ? ct1 current ? {ct1 current in milliamperes} ct2 current ? {ct2 current in milliamperes} full current ? {ct1+ct2 current in milliamperes} internal temp ? {EL731temperature measurement} ptc status ? {ptc state} rtd temperature ? {rtd temperature in celsius & farenheit} exit ? {return to previous menu} messages ? trip state ? {trip status} alarm state ? {alarm status} trip counter ? {trip counter} alarm counter ? {alarm counter} running time ? {running hours} exit ? {return to previous menu} setup ? protection ? ct1 earth fault ? enable/disable ? [e/d] trip time ? [x] trip level ? [x] alarm level ? [x] calibrate ? [p] exit ? {return to previous menu} ct2 earth fault ? enable/disable ? [e/d] trip time ? [x] trip level ? [x] alarm level ? [x] input filter ? [e] exit ? {return to previous menu} ptc local temp ? trip action ? [e/d] alarm action ? [e/d] rtd local temp ? trip action ? [e/d] trip level ? [x] alarm action ? [e/d] alarm level ? [x] exit ? {return to previous menu} relay outputs ? relay 1 ? function ? [e] fail-safe mode ? [e/d] test ? [p] www.datasheet.co.kr datasheet pdf - http://www..net/
page 19 EL731 ac/dc sensitive earth-leakage relay rev. 2 menu level 1 2 3 4 5 6 pub. EL731, february 28, 2012 exit ? {ret. to prev menu} relay 2 ? function ? [e] fail-safe mode ? [e/d] test ? [p] exit ? {ret. to prev. menu} relay 3 ? function ? [e] fail-safe mode ? [e/d] test ? [p] exit ? {ret. to prev. menu} exit ? {return to previous menu} analog output ? analog % level ? [e] ct select ? [e] exit ? {return to previous menu} hardware ? temp. sensor ? [ptc sensor / rtd sensor / disabled] system config ? change password ? [s] password enable ? [e/d] menu timeout ? [x] maintenance ? clear counters ? [p] load defaults ? [p] restart system ? [p] firmware ver. ? [p] system version ? [p] rom version ? [s] build date ? [s] serial number ? [s] exit ? {ret. to prev menu} exit ? {return to previous menu} exit ? {return to previous menu} password ? [s] exit ? {return to main menu} l egend ? : this menu item has a sub menu, press enter view sub menu. ? : last menu, press enter key to view data. [p]: prompt for response from user [y/n]: yes/no. [x]: numeric. [s]: string. specific string format may be required. [e]: selection is from a list of values. [ea]: ethernet address (xxx.xxx.xxx.xxx). [e/d]: enable/disable. www.datasheet.co.kr datasheet pdf - http://www..net/
page 20 EL731 ac/dc sensitive earth-leakage relay rev. 2 pub. EL731, february 28, 2012 a ppendix b s ystem p arameters parameter and settings min default max unit program selection protection ct1 earth fault enable/disable enable ? enable ? disable trip time 0 30 2,000 ms trip level 30 60 5,000 ma alarm level 30 30 5,000 ma ct2 earth fault enable/disable enable ? enable ? disable trip time 0 30 2,000 ms trip level 30 60 5,000 ma alarm level 30 30 5,000 ma input filter full range ? full range, ? 190 hz high pass ? 90 hz low pass ptc local temp trip action disabled ? enabled ? disabled alarm action disabled ? enabled ? disabled rtd local temp trip action disabled ? enabled ? disabled trip level 40 150 200 degree celsius alarm action disabled ? enabled ? disabled alarm level 40 125 200 degree celsius relay outputs relay 1: function trip ? trip ? current ? watchdog ? alarm mode failsafe relay 2 function alarm ? trip ? current ? watchdog ? alarm mode failsafe relay 3 function watchdog ? trip ? current ? watchdog ? alarm mode failsafe ry pulse time analog output ct select ct1 current ? ct1 current ? ct2 current ? full current analog % level disabled ? enabled ? disabled hardware temp sensor disabled ? disabled ? ptc sensor ? rtd sensor system config change password 0000 1111 9999 password enable disabled ? enabled ? disabled menu timeout 1 10 60 minutes ? enabled ? disabled www.datasheet.co.kr datasheet pdf - http://www..net/

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