USER MANUAL - seb barlassina
Contents
1. s T l gt 44 S Pa 1 0 380V if T 2 0 100v Ri DAL 01 me PI P2 3 gt 43 T L 6 0 380V 7 0 100V E L gt U2 pa 1 8 GS SH 89 i R2 11 0380V lt N 12 0 100V U3 E Dn 13 lt L 16 0 380V lt gt ez C 17 0 100V L A uo 18 N Si R3 S35 DSH 85 gt 34 Ez S26 SHE dI LI DIGI a KE S25 R4 O 25 010 2 Ke T S27 GK a 00 3 KE Ly RE DSH 88 47 lt Uaux RS gt 36 TEST Me a A S37 45 1 46 j LINEH aR a 23 S 4 L LINEL gt 20 8 Haz 5 STAR DELTA Insertion 30 SEB Divisione Elettronica e Sistemi INSTALLATION a 1 0 380V 2 0 100V pS PI P2 s2 st i a 6 0 380V 7 0 100V 8 Pi P2 s2 st 11 0 380V muss lt 12 0 100V lt 13 16 0 380V lt 17 0 100V VOLTAGE BALANCE ANSI 60 Insertion 31 SEB Divisione Elettronica e Sistemi INSTALLATION 172 9 Dimensioni meccaniche Case outlines N 4 fori 4 6 Dima montaggio da incasso Flush mounting panel cut out Montaggio incassato Flush mounting Dimensioni pannello frontale trasparente Transparent front panel sizes 208 x 89 5 mm 32 SEB Divisione2. 16 5 7 Output relays programming fig 2 18 5 8 Digital inputs function programming fig 2 eee eee 20 5 9 062091 007620275 006 2 555555559 5555 24555 54595995 RE ESL EME EAR ERE LAE 555 549 5 5555 45495 54554 95544 21 5 10 Parameter values visualization fig 3 23 bol A E e S EEE EEEE EET EE EEE eddie ite 24 5 12 Trip counters f0 3 stare SS Dee 58 55 5555 58 55 2555 58 55 5553 26 Go INS TFALEATION 0 an te tt rote a ET DER TID LEE BG 28 6 1 SUP ei lt 0 Kad om adage es td rr 24444 Ee ERE 28 62 Cabling sre eed hee LED LE DLL DUNG DLL DESDE DPE TDL DL 29 6 3 Relays R3 and R4 Signalling Command set up 33 6 4 RS485 serial communication 201 eee eee 33 7 TIME DEPENDENT CURVES see 34 8 TEGHNIGAL GHARAGTERISTICS 0a alianti 35 OS TABLES sele ea aa astanti 36 Information printed in this manual subject to change without prior notice This manual must not be reproduced in whole or in part in any form or by any means
3. 7 TIME DEPENDENT CURVES Curva Curve A Curva Curve B 1000 1000 100 8 10 4 NNS W 2 AU 2 1 s oN S 4 i 05 R 0 15 iW E S 4 k 12001 0 01 e NOTH 2 L g NYD 2 C g U Uthresh U Uthresh Curva Curve C Time dependent characteristic 100 Ki K 0 02s U 1 Uthresh 10 _ Curve IEC 255 4 A B 6 8 Ki 0 14 135 80 aa a 0 02 1 2 S K Parameter 0 01 20 00 s i U U gt Ratio between the greatest measured si de Uo Uo gt voltage and the threshold U gt or Uo gt 028 U lt U Ratio between the threshold U lt and 018 the lowest measured voltage K 0 08 r NOS o U Uthresh 1 15 20 34 SEB Divisione Elettronica e Sistemi TECHNICAL CHARACTERISTICS 8 TECHNICAL CHARACTERISTICS Measuring inputs Rated line voltage Un and residual voltage Uon Thermal withstand continuously Thermal withstand for 1 s Rated frequency Primary VT s voltage Output contacts ratings Number of relays note 1 Rated current Rated voltage Contact configuration Breaking capability note 2 tripping relays R1 R2 signalling relays R3 R4 R5 note 3 Mechanical life D
4. 0 10 V dc ac The digital input acquisition is valid when the voltage value stays in the range Hl or LO for at least 40 ms DISPLAY OF MEASURES the user can select the continuous display of a measured voltage primary values all the voltage measures can be transmitted to an external controller through the RS485 port EVENTS information related to the last 8 events TRIP or STATUS are recorded in the EEPROM memory Information includes the threshold set up and activated relays TRIP event only the measured voltages the digital input status date and time of the event SELF DIAGNOSIS the software includes a non stop monitoring module that controls the functionality of all hardware and software resources of the protection relay Detected fault conditions are reported by e diagnostic message on the display e glow of ared LED on front panel e RS output relay drop off SEB Divisione Elettronica e Sistemi GENERAL CHARACTERISTICS The fault condition signalling stays until faults are pointed out by the monitoring module during this condition the protection functions are suspended to avoid unsuitable tripping STATUS FUNCTION when the STATUS function is activated by one of the digital input when programmed the protection relay memorizes information related to measured voltages and digital input status see par 5 11 EVENTS The recorded information allows an analysis of trip causes in co operative protection relays s
5. TRIP INHIBITION 5 10 Parameter values visualization fig 3 L1 L2 L3 L4 L5 L6 THRESHOLDS STATUS The actual status of each threshold is displayed only the thresholds available depending on FUNCTION SELECTION set up are visualized ref paragraph 5 2 For each threshold are displayed the threshold identification U lt U gt etc and the threshold status the status can show one of the following values ON active threshold OFF disabled threshold programmed OFF at ref E1 par 5 6 OFF_DIG threshold programmed active but momentary disabled by a digital input actual status Examples U lt lt U gt gt Uo gt Uo gt gt ON OFF ON OFF DIG M1 M2 OUTPUT RELAY STATUS The actual status of each output relay is displayed for each relay the following information is displayed e relay identification R1 R2 R3 R4 e relay status ON activated OFF non activated Note that ON OFF do not necessary mean energized or de energized see ref F 1 N1 N2 DIGITAL INPUT STATUS The actual status of each digital input is displayed 23 SEB Divisione Elettronica e Sistemi DISPLAY AND PROGRAMMING For each digital input the following information is presented e digital input identification DIG1 DIG2 DIG3 e digital input status HI or LO P1 P2 P3 P4 DISPLAY OF MEASUREMENTS The actual value of the measured voltages is displayed only the measured voltages depending on FUNCTION SELECTION ref C1 paragr
6. Sed DIVISIONE ELETTRONICA E SISTEMI UARAN DIGITAL UNDER AND OVERVOLTAGE MULTIFUNCTION RELAY USER MANUAL P500D804 July 2004 SEB Divisione Elettronica e Sistemi INDEX INDEX 1 GENERAL CHARACTERISTICS 3a ants attend ideati alan iaia 1 2 FRONCPANEL IENS ea aaa aaa i 4 3 o FRONT PANEL LED SIGNALLING S wrx atest ete te totaal ate 5 Mavs dolo 5 4 PROGRAMMING AND TEST sic desde ches cdl shade cobs ts iii de cds heels hate 6 4 1 How to program the protection relay eee 6 4 2 Howto modify a visualized parameter 7 4 9 ROSO rin nio LIRA anda dI LE AC AEE EES iii 7 4 4 Testof outputrelays imine il ini lin le ei 8 5 DISPLAY AND PROGRAMMING ecg pice dee ou pele ipo die pia 9 del Standard display cs ests cul cst def ini fa doti of ce ai al el 55555 5 alii ai ace 9 5 2 Visualization structure ttt torio 018 ae dol nea 10 5 3 ADDRESS and TIME fig 1 12 5 4 Protection function selection fig 1 14 5 5 Nominal values set up fig 2 15 5 6 Thresholds and time delays set up fig 2
7. lt trip condition on U lt or U lt lt thresholds red U gt gt gt trip condition on U gt or U gt gt thresholds red Uo trip condition on Uo gt or Uo gt gt thresholds red The last trip condition threshold indication is also showed on front panel display more information on trip condition are presented in the recorded EVENT see par 5 11 NOTE even when only the ANSI 27 function is activated undervoltage thresholds an internal 2 Un overvoltage threshold is always active therefore if a mistake on the protection relay insertion is made 100 V protection signal input terminals connected to one or more plant VT s with more than 200 V nominal output the red LED related to U gt threshold will lit without any trip of output relays When the ANSI 59 function is activated overvoltage thresholds the trip of the protection relay will show the mistake SEB Divisione Elettronica e Sistemi PROGRAMMING AND TEST 4 PROGRAMMING AND TEST The protection relay is easily programmable following the instructions in the next paragraphs e HOW TO PROGRAM THE PROTECTION RELAY e HOW TO MODIFY A VISUALIZED PARAMETER All parameters can be freely modified the proper protection set up as required by the plant management is submitted to the operator s judgement 4 1 Howto program the protection relay The programmable parameters are showed in Figures 1 2 and 3 at the following references B2 B7 relay address RS
8. B C A B C Characteristic constant 0 01 20 00 s 0 01 20 00 s 0 01 20 00 s Resolution 0 01s 0 01s 0 01s Additional delay 0 00 99 99 s 0 00 99 99 s 0 00 99 99 s OTHER VALUES Burden referred to the 0 3 VA phase 0 3 VA phase rated value Output relays Configurable for each thresholds R1 R2 R3 R4 STRAT TRIP normally ON OFF 36 SEB DIVISIONE ELETTRONICA E SISTEMI UFFICIO COMMERCIALE Via Segantini 5 20825 BARLASSINA MB tel 39 0362 5669 1 fax 39 0362 556622 web www seb barlassina it mail to servizio clienti seb barlassina it
9. Elettronica e Sistemi INSTALLATION 6 3 Relays R3 and R4 Signalling Command set up The protection relay is supplied with R3 and R4 relays configured as SIGNALLING RELAYS with 2 change over output contacts with breaking capability equals to 0 2 A at 110 Vdc L R 40 ms 100000 operations Each R3 and R4 relay can be configured as COMMAND RELAY with 1 change over output contact with breaking capability equals to 0 5 A at 110 Vdc L R 40 ms 100000 operations The new configuration is obtained with the following cabling 6 4 RS485 serial communication port The digital protection relay UAR4N presents an insulated serial interface RS485 half duplex that allow the multi drop connection up to 31 protection units When the STANDARD Seb communication protocol is selected the transmission speed is automatically selected between 300 to 9600 bauds and the protocol is ASCII HEX the documentation related to the protocol is freely available on request When the MODBUS communication protocol is selected the transmission speed can be programmed between 300 to 9600 bauds ref B3 par 5 3 It is suggested to use a shielded twisted pair AWG22 terminal 19 not connected internally can be used for shields connections 120 Ohm 120 Ohm CONTROLLORE PROTEZ 1 PROTEZ 2 PROTEZ 3 It is suggested to terminate the serial line with a resistance 120 Q 1 4 W 33 SEB Divisione Elettronica e Sistemi TIME DEPENDENT CURVES
10. modify a visualized parameter When the parameter to be modified is visualized on front panel display do the following sequence 1 PRESS ENTER to activate the parameter modification session If one or more parameters are modifiable on the first of them will appear a blinking cursor If no parameters are modifiable no blinking cursor will appear 2 MODIFY THE PARAMETER pressing the arrow push buttons and when two parameters are modifiable the push button allows to point out the parameter to be modified the selected parameter will blink 2 when numerical parameters are pointed out the push button allows to select the digit to be modified increasing of the parameter a the digits are increased by 1 unit b the other parameters are presented following the selection list 3 PRESS ENTER to end parameter modification session The modification session is ended and the parameter stops to blink NOTE if a numerical parameter is selected out of the accepted range as shown in Table A when the push button ENTER is pressed for few seconds an error message will be displayed as Data Error and the parameter will be displayed again with the former value 4 3 Reset When the push button RESET is pressed the protection relays returns to the standard condition e reset of glowing LEDs e drop off of tripped relays e reset of any parameter changed but not confirmed parameters are shown as confirmed at the end of
11. the UAR4N model they are not used 6 2 Cabling Voltage circuits It is suggested to terminate the voltage wirings using plug terminals Minimum suggested wire cross section 1 5 mm With reference to the insertion diagram in the next page the voltages measured by the protection relay have the following matching U1 terminals 1 3 voltages with Un programmed from 110 to 380 V terminals 2 3 voltages with Un programmed from 0 to 100 V U2 terminals 6 8 voltages with Un programmed from 110 to 380 V terminals 7 8 voltages with Un programmed from 0 to 100 V U3 terminals 11 13 voltages with Un programmed from 110 to 380 V terminals 12 13 voltages with Un programmed from 0 to 100 V Uo terminals 16 18 voltages with Uon programmed from 110 to 380 V terminals 17 18 voltages with Uon programmed from 0 to 100 V For 2 phase functions only the voltages U1 and U2 are measured for the functions as residual voltage 59N or 59 Vo or stator earth fault 95 64S only the voltage Uo is measured The input terminals related to Uo have to be connected to a VT sensible to residual voltages e g star open delta VT module Other circuits output relays etc It is suggested to terminate the wiring using plug terminals Minimum suggested wire cross section 1 5 mm 29 SEB Divisione Elettronica e Sistemi INSTALLATION
12. the last programming session 7 SEB Divisione Elettronica e Sistemi PROGRAMMING AND TEST e display on STANDARD MODE Fig 1 ref A1 par 5 1 4 4 Test of output relays When the output relays test is selected Fig 2 ref F8 it is possible to command an output relay one at the time to trip from the current status allowing functional tests on electrical plants The output relays are activated with the following sequence 1 SELECT THE VISUALIZATION of the desired output relay to be tested TEST R1 OFF 2 PRESS ENTER to activate the test session the message OFF will start to blink 3 PRESS and the message on the display will change as TEST ON 4 PRESS ENTER to command the instantaneous trip of the output relay change of the current status The relay will stay on the new condition until e the B or RESET push button is pressed e the ENTER push button is pressed and the sequence at points 3 and 4 is repeated presenting OFF condition The same procedure will be used for R2 R3 and R4 relays SEB Divisione Elettronica e Sistemi DISPLAY AND PROGRAMMING 5 DISPLAY AND PROGRAMMING The contents and the structure of the displayed messages are shown in figures 1 2 and 3 the references A1 B1 B2 etc identify specific displayed messages in the figures 5 1 Standard display A1 STANDARD DISPLAY It is the standard displayed message without operator s intervention no push buttons pressed for at
13. 485 and date time C1 relay function D1 D6 nominal values contrast etc E1 E5 thresholds and time delays F1 F7 output relays functions G1 G3 digital input functions H1 H3 special functions R1 R12 partial trip counters reset The programming sequence is the following 1 SELECT the visualization on display of the parameter to be modified using the arrow push buttons 2 ACTIVATE the PARAMETER MODIFICATION session depressing the ENTER push button and modify the parameter value 3 END the parameter modification session depressing again the ENTER push button 4 REPEAT the procedure from 1 to 3 for all the parameters required to obtain the new protection relay set up 5 CONFIRM the new protection relay set up at the visualization CONFIRM PROG Fig 2 ref J1 within 5 minutes depressing the push buttons ENTER and up to visualize YES and ENTER again to confirm NOTE The protection relay continues to operate using the previous set up until the new set up is confirmed as at point 5 above the visualization of the modified parameters before the new set up confirmation is only temporary to allow an easy definition of the new protection set up If the new set up is not confirmed within 5 minutes from the last pressed push button the protection relay visualizes again the previous set up the parameters set up that the protection relay is still using SEB Divisione Elettronica e Sistemi PROGRAMMING AND TEST 4 2 Howto
14. 4N with rear socket e transparent front panel for rack installation e blister with items 1 2 3 4 5 CS VERSION flush mounting installation e protection relay module UARAN with rear socket e transparent front panel for rack flush mounting installation e n 2 brackets for flush mounting e blister with items 1 2 3 4 5 e blister with item 6 Sacchetto BLISTER 1 n 8 screws to fix wire terminals of current circuits NOT USED 2 n 4 screws to fix the relay rear socket on the 19 rack or on the two brackets for flush mounting and n 2 screws to fix optionally the protection relay on the front of the 19 rack 3 n 2 knobs to fix the transparent front panel 4 n 8 washers to be used to fix wire current terminals NOT USED 5 n 8 growers to be used to fix wire current terminals NOT USED 6 small items to fix brackets on the cabinet only CS version The knobs to fix the transparent front panel must be screwed through the front panel itself the operation will create a screw thread in the plastic material to prevent knob missing 28 SEB Divisione Elettronica e Sistemi INSTALLATION NOTE The items related to current inputs are the standard supplied items with all SIGMA N protection relays but for
15. 59 function is activated overvoltage thresholds the trip of the protection relay will show the mistake FUNCTION FUNCTION FUNCTION 3 U gt 2U lt gt Uo gt BALANCE 14 Examples SEB Divisione Elettronica e Sistemi DISPLAY AND PROGRAMMING 5 5 Nominal values set up fig 2 D1 NOMINAL LINE VOLTAGE SELECTION Un programmable Un XXX XX V Un nominal line voltage selection nominal secondary voltage of plant VTs selectable between the followings 57 73 63 50 72 16 100 110 125 190 220 230 380 400 The Un selection is not visualized when the selection of the function of the protection relay includes only residual voltage measurement see selection table par 5 4 C1 D2 NOMINAL RESIDUAL VOLTAGE SELECTION Uon programmable Uon XXX XX V Uon nominal residual voltage selection nominal secondary voltage of plant residual voltage transformers selectable between the followings 57 73 63 50 72 16 100 110 125 190 220 230 380 400 The Uon selection is not visualized when the selection of the function of the protection relay includes only line voltage measurement see selection table par 5 4 C1 D3 PRIMARY VT s LINE VOLTAGE programmable V prim XXXXXX V Primary voltage value of the installed line VT s the value is programmable from 000001 to 999999 V D4 PRIMARY VT s RESIDUAL VOLTAGE programmable Vo prim XXXXXX V Primary voltage value of the installed resid
16. DIGITAL DIG1 ccc DIG2 ccc DIG3 ccc INPUT XXXXXXXX XXXXXXXX XXXXXXXX H1 H2 H3 SPECIAL INHIBIT 3 U lt U lt lt 3 U gt U gt gt FUNCTION U lt lt lt XX XXXXXXXX XXXXXXXX J1 CONFIRM PROG To FIGURE 3 Figure 2 11 DISPLAY AND PROGRAMMING SEB Divisione Elettronica e Sistemi C ni SS wu UU ee wuu 66 2999 5555 Li 2999 d Sud ANIL Sud aLvd Sud LOL lt lt on lt lt on SLA rid eld cla LLY 2999 2999 d 2999 I 2999 d 2999 I 2999 d 2999 L 2999 d 2999 L 2999 d lt on lt on lt lt a lt lt a lt a lt a gt gt gt gt gt N gt N SUALNNOI OW 6H 99 Za 99 SY va Y C9 VU 99999990 Ti 8a ss ww yy ee wu 66 MMM E9I0 MMM 210 MMM SIG SWT L T4 9160 T4 Ta Ta Ta SLO FLO KLO cio LLO HON UN un XX X un KATA uuuuuuuu uuuuuuu S_XX XX ALT UN XXX 99999999 on Ta EN Ta ca Ta In Ta dds d Ta DIC Ta 301 1 T4 AYTA Ta eeeee Ta Ta SINIAH olo 60 8d zo 90 so vd KD ZD LO A AAAAAK A AAAAAA A AKKKKK A AAAAAA SOLVLS XX X 0f XX X N XXX ZN XX X IN SAVASVAN vd d Zd Ld MMM COI SNIVIS MMM EDI MMM THI TULISIA N LN 2959 FH 299 SOLWLS 222 255 TI SAYTA cw LA 5 0375375 snq4e s SES 5 0 4545 5 0 4545 5 04545 SAOLVIS SALVIS SINHAH lt lt on lt on lt lt
17. a lt n gt gt gt N TOHSHYHL TWNOIS SHAVNSVAN 91 sl VI K VI z FYNOIH 00043 ADDRESS and TIME fig 1 B1 RELAY MODEL not programmable 5 3 UAR4N mod 4T The nominal input voltages are programmable ref D1 and D2 par 5 5 12 SEB Divisione Elettronica e Sistemi DISPLAY AND PROGRAMMING B2 COMMUNICATION PROTOCOL programmable B2 PROTOCOL XXXXXXXX The communication protocol is programmable between the followings STANDARD ASCII SEB protocol MODBUS Modbus protocol SLAVE When the MODBUS protocol is selected the following display is showed to allow the selection of the transmission speed B3 BAUDRATE XXXX The xxxx parameter is selectable between the followings 300 600 1200 2400 4800 9600 When the STANDARD protocol is selected the baud rate is automatically selected by the protection relay B4 ADDRESS programmable NR RELAY 001 Programmable address from 001 to 255 The number is used on RS485 port to address a specific relay when two or more protection relays are linked on the same serial line B5 RELAY SERIAL NUMBER not programmable SER NR 0012345 B6 SOFTWARE REVISION LEVEL not programmable SW REV LL gli Ls dd mm yy hh mm ss Time and date are programmable and they ar
18. aph 5 4 are displayed For each voltage the following information is displayed e voltage identification U1 U2 U3 Uo e actual value expressed as Un or Uon e actual primary value expressed as Volts Ul 1 20 U3 0 86 Uo 0 11 24000 V 8600 V 33 VN 5 11 Events fig 3 On the display are shown the memorized information related to the last 8 TRIP events Examples The 8 events are recorded and identified with a progressive number from 1 to 8 the more recent event shows a lower number Q1 EVENT NUMBER El CCCCCCCCe The index E1 E2 E8 identifies the memorized event The parameter cccccccc gives information on the kind of event and it can show one of the following values NONE no event memorized U lt event on threshold U lt trip U lt lt event on threshold U lt lt trip U gt event on threshold U gt trip U gt gt event on threshold U gt gt trip Uo gt event on threshold Uo gt trip Uo gt gt event on threshold Uo gt gt trip STATUS information recorded on external command POWER ON switch on of the protection relay auxiliary power For the events NONE and POWER ON no other information is presented for the other events the following displays give more detailed information on the event 24 SEB Divisione Elettronica e Sistemi DISPLAY AND PROGRAMMING Q2 TRIP THRESHOLD El U gt x Xx Un It shows the threshold related to the TRIP condition of the protection relay and the value of the thres
19. d event is displayed using the following values 1 Trip inhibition when all voltages are lower 0 2 Un see H1 par 5 9 2 Logical function on undervoltage thresholds see H2 par 5 9 3 Logical function on overvoltage thresholds see H3 par 5 9 If no functions are activated the message NONE is displayed Q7 Q8 Q9 Q10 MEMORIZED MEASURED VOLTAGES ON EVENT y yy Un y yy Un y yy Un y yy Un The values of the measured voltages at the event are displayed the values are expressed as Un and Uon terms There are presented only the voltages measured coherently with the selection on FUNCTION SELECTION set up ref C1 paragraph 5 4 Q11 Q12 Q13 DIGITAL INPUTS STATUS ON EVENT El El El DIGI vv DIG2 vv DIG3 vv The status of the digital inputs at the event are displayed The parameter vv can assume the value HI or LO Q14 Q15 DATE AND TIME OF THE EVENT El Date El Time dd mm yy hh mm ss The date and time of the event are showed 5 12 Trip counters fig 3 In this section are displayed the total and partial counters of the output relay activation on TRIP conditions for each thresholds and the numbers of programming sessions with the date and time of the last confirmed programming session The total counters the number of confirmed programming sessions and the date and time of the last confirmed programming session are not modifiable or resettable the information related to the last programming sess
20. e the additional time delay is added to time delay TI The additional time delay activation is controlled by the digital inputs to allow the use of the UARAN relay with co operating protection relays The available settings for each timers are listed in Table A OUTPUT RELAYS the UARAN controls 4 output relays named R1 R2 R3 and R4 these relays can be programmed to be activated on START or TRIP conditions of one or more thresholds SEB Divisione Elettronica e Sistemi GENERAL CHARACTERISTICS START instantaneous activation of the output relay when at least one of the measured voltages exceeds the programmed threshold value TRIP activation of the output relay when the programmed time delay TI or TI TA related to a threshold expires The quiescent state of each single relay R1 R2 R3 and R4 can be programmed as normally energized ON or normally de energized OFF An additional relay R5 normally energized is controlled by the self diagnosis routines to report detected fault conditions DIGITAL INPUTS there are available 3 digital inputs to activate the following functions when enabled by the programmed set up e additional time delay related to one or more thresholds e on off thresholds e STATUS function recording of measures on external event e pilot wire fault monitoring For each digital input can be programmed the condition that activates the related functions HI voltage gt 20 V dc ac LO voltage
21. e lower than 0 2 Un e relay trip enable or relay trip inhibition when all the measured voltages are lower than U lt and U lt lt thresholds all the measured voltages are higher than U gt and U gt gt thresholds SEB Divisione Elettronica e Sistemi FRONT PANEL KEYS 2 FRONT PANEL KEYS The 5 push buttons on the front panel allow to view all the protection parameters and to modify the protection set up B right arrow down arrow programming session activation or parameter confirmation change or increment of the selected parameter RESET reset of the protection relay rif Par 4 3 VISUALIZATION OF PARAMETERS all visualizations are circular and they can be displayed using the two arrow push buttons e the structure of the visualizations and their contents are showed in Figures 1 2 and 3 e when the sealable transparent front panel is installed only the arrow push buttons and the RESET push button are accessible to prevent unauthorized modification of the protection set up MODIFICATION OF PARAMETERS e remove the transparent sealable front panel to access ENTER and push buttons SEB Divisione Elettronica e Sistemi FRONT PANEL KEYS 3 FRONT PANEL LED SIGNALLINGS POWER auxiliary supply available green FAIL fault condition detected by SELF DIAGNOSIS software or by red PILOT WIRE FAULT MONITORING function REMOTE communication session active on RS485 port red U lt lt
22. e used to mark recorded events B7 TIME DATE programmable 13 SEB Divisione Elettronica e Sistemi DISPLAY AND PROGRAMMING NOTE the clock is not provided with back up battery therefore a loss of auxiliary supply will force time date to the following condition 01 01 90 00 00 00 5 4 Protection function selection fig 1 C1 FUNCTION SELECTION programmable FUNCTION XXXXXXXX The selection of the active function defines the selectable thresholds ACTIVABLE FUNCTION ana SELECTION THRESHOLDS Undervoltage 2 phase 27 2 U lt Overvoltage 2 phase 59 2 U gt Under overvoltage 2 phase 27 59 2 U lt gt U lt U lt lt Under overvoltage 3 phase 27 59 3 U lt gt U gt U gt gt Residual overvoltage 59N 59Vo Uo gt Under overvoltage 2 phase U lt U lt lt U gt and residual overvoltage eee SITA Under overvoltage 3 phase U lt U lt lt U gt and residual overvoltage t REO Under overvoltage 2 phase U lt U lt lt U gt Under overvoltage 3 phase U lt U lt lt U gt and stator 95 earth fault LAD ai Voltage balance 60 BALANCE Stator earth fault 95 STATOR95 NOTE if only the ANSI 27 function is activated undervoltage thresholds and a mistake on the protection relay insertion is made 100 V protection signal input terminals connected to one or more plant VT s with more than 200 V nominal output the red LED related to U gt threshold will lit without any trip of output relays When the ANSI
23. ed Corrective action verify pilot wire short or open circuit The string eeeeeeee can be SEB Divisione Elettronica e Sistemi DISPLAY AND PROGRAMMING HARDWARE Detected fault condition on hardware or software resources of the 5 2 protection relay all functions are suspended Corrective action replace the protection relay and contact SEB post sales service Visualization structure A1 ANSI 27 Alternative FAIL TRIP Ul Uo 59 59N displays eeeeeeee U gt gt XXXXXX V XXXXXX V B1 B2 B3 B4 B5 B6 B7 UAR4N PROTOCOL BAUDRATE NR RELAY SER NR VERS SW dd mm yy mod 4T yyyyyyyy nnnn XXX ZZZZZZZ XX XX hh mm ss C1 Function selection FUNCTION 2U lt 3U lt 2U gt 3U gt 2U lt gt 3U lt gt Uo gt 2U lt gt Uo qaaaadag 3U lt gt Uo 2U lt gt ST 3U lt gt ST BILANCE STATOR95 SETUP NOMINAL Nominal data VALUES fig 2 THRESHOL THRESHOLDS set up SET UP fig 2 RELAYS OUTPUT RELAYS set up FUNCTION fig 2 DIGITAL DIGITAL INPUTS set up INPUT fig 2 SPECIAL SPECIAL FUNCTION set up FUNCTION fig 2 J1 CONFIRM PROG MEASURES SIGNAL Display of SIGNALS and OUTPUT RELAYS status amp EVENTS STATUS fig 3 EVENTS Display of EVENTS data fig 3 COUNTERS Display of COUNTERS data fig 3 Figure 1 10 SEB Divis
24. hold in relative terms The information is not shown on STATUS or POWER ON events Q3 ACTIVATED OUTPUT RELAYS El RELAY nnnnnnn It shows the list of the output relays activated by the threshold trip El RELAY E3 RELAY 1 3 4 1 4 When no output relays have been activated no relays programmed to TRIP on the threshold the following message will be displayed El RELAY NONE El T Tot Www ww S It is shown the total delay to the TRIP of the output relays from the under or overvoltage detection when additional delays are activated the change of the status of the digital input that controls the additional delay during the delay itself could bring to a total time different from the sum of the programmed delays If the total time is greater than 999 seconds the display of tenths is omitted Examples Q4 TOTAL TIME DELAY TO TRIP When the event is memorized on external command STATUS the message N A Not Applicable is shown instead of the number of seconds El T Tot N A Q5 DIGITAL CHANNELS RELATED TO MEMORIZED EVENT El DIG T7374 The list of the digital inputs related to the memorized event is displayed STATUS function command or additional time TA enabled rif E4 par 5 6 If no digital inputs were activated the message NONE is displayed 25 SEB Divisione Elettronica e Sistemi DISPLAY AND PROGRAMMING Q6 ACTIVE SPECIAL FUNCTIONS El F SPE 13 The list of the active special functions at the memorize
25. igital inputs Number of inputs External control voltage Typical current sink Data transmission Standard Communication protocol Transmission speed Optional Auxiliary supply programmable 57 73 63 50 72 16 100 110 V 125 190 220 230 380 400 2 Un Uon 2 Un Uon 50 60 Hz 1 999999 V 4 1 5A 250 V change over 0 5 A 0 2 A gt 108 3 as Uaux 2 mA RS485 half duplex MOD BUS ASCII 300 9600 baud selectable fibre optic module 24 320 Vdc 20 mange 48 230 Vac 20 Frequency Vac 47 63 Hz Burdens min max 5 10 W Environmental conditions Operation 10 60 C Transport and storage 25 80 C Relative humidity without condensation lt 95 Protection degree for flush mounting IP 52 optional IP 54 Weight 2 5 kg Note 1 The additional relay R5 is controlled by self test program Note 2 Breaking capability at 110 Vdc L R 40 ms 100 000 operations Note 3 The output contacts of R3 and R4 relays can be configured as signalling or tripping relays SEB Divisione Elettronica e Sistemi TABLES 9 TABLES Table A Rated values and settings Setting 0 30 1 60 Un 0 30 2 00 Un 0 01 1 60 Uon OFF OFF OFF Resolution 0 01 Un 0 01 Un 0 01 Uon TRIP DELAYS Definite time Setting 0 02 99 99 s 0 02 99 99 s 0 02 99 99 s Resolution 0 01 s 0 01 s 0 01s Dependent time U lt U gt Uo gt Characteristic curves IEC 255 A B C A
26. ion are used to control unauthorized access 26 SEB Divisione Elettronica e Sistemi DISPLAY AND PROGRAMMING The partial counter can be modified following the standard set up procedure for parameters as described at paragraph 4 2 the partial counters are immediately modified in the memory the recorded values are immediately resetted without the need of the programming confirmation R1 R12 TRIP COUNTERS U gt U gt P iSCCE T LGEcc Display of the partial P and total T counters of the TRIP condition related to each threshold When the value exceed 9999 the counter starts again from 0000 The counters are identified by the threshold name U lt U lt lt Uo gt etc they are presented only the counters related to the active thresholds coherently with the selection on FUNCTION SELECTION set up ref C1 paragraph 5 4 The partial counters are modifiable in the range from 0000 to 9999 following the standard set up procedure paragraph 4 2 R13 R15 TOTAL PROGRAMMING SESSIONS AND DATE TIME OF THE LAST PROGRAMMING SESSION TOT PRG DATE PRG TIME PRG eeee dd mm yy hh mm ss Display of the number of confirmed programming sessions from the factory set up and the date and time of the last confirmed programming session 27 SEB Divisione Elettronica e Sistemi INSTALLATION 6 INSTALLATION 6 1 Supplied kit RK VERSION 19 rack installation the proper rack is supplied by SEB e protection relay module UAR
27. ione Elettronica e Sistemi DISPLAY AND PROGRAMMING From FIGURE 1 D1 D2 D3 D4 D5 D6 SETUP NOMINAL Un Uon V prim Vo prim DISPLAY CONTRAST VALUES XXX XX V XXX XX V XXXXXX V XXXXXX V eeeeeeee LEV n E1 E2 E3 E4 E5 THRESHOL U lt ccc U lt TI eeeee TA U lt TA U lt SETUP n nn XXXXXX V XX XX 5 XX XX S eeeeeeee USS CCG U lt lt TI INDIP TA U lt lt TA U lt lt n nn XXXXXX XX XX S XX XX S eeeeeeee U gt ccc U gt TI eeeee TA U gt TA U gt n nn XXXXXX V XX XX S XX XX S eeeeeeee U gt gt ccc U gt gt TI INDIP TA U gt gt TA U gt gt n nn XXXXXX V XX XX S XX XX S eeeeeeee Uo gt ccc Uo gt TI eeeee TA Uo gt TA Uo gt n nn XXXXXX V XX XX S XX XX S eeeeeeee Uo gt gt ccc Uo gt gt TI INDIP TA Uo gt gt TA Uo gt gt n nn XXXXXX V XX XX S XX XX S eeeeeeee F1 F2 F3 F4 F5 F6 F7 RELAYS R1 RL U lt RI U lt lt R1 U gt R1 U gt gt R1 Uo gt R1 Uo gt gt FUNCTION ORM ccc XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX 78 R2 TEST R1 ORM ccc VY YY YY R3 ORM ccc R4 ORM ccc G1 G2 G3
28. ires The additional time delay TA will be added if the time delay TI is programmed at least equals to 50 ms digital input acquisition time 40 ms E5 DIGITAL INPUT ACTIVE ON THRESHOLD not programmable TA U gt eeeeeceee It shows the digital input programmed to activate the additional time delay TA on the displayed threshold The parameter eeeeeeee can show one of the following values DISABLED none of the digital inputs has been programmed to activate an additional time delay related to threshold U gt DIG1 digital input DIG1 activates the TA delay on threshold U gt DIG2 digital input DIG2 activates the TA delay on threshold U gt DIG3 digital input DIG3 activates the TA delay on threshold U gt More than one digital input can activate the same additional time delay e g DIG 1 3 Please note that to activate the additional time delay at least one of the digital inputs should be programmed ref G1 G2 G3 paragraph 5 8 When a TIME DEPENDENT characteristic threshold has been programmed the visualization is omitted as no additional time delays can be defined and programmed on time dependent delays 5 7 Output relays programming fig 2 The session allows to program the activation of the output relays R1 R2 R3 or R4 on START or TRIP conditions for each threshold In the programming session are displayed only the thresholds available depending on FUNCTION SELECTION set up ref C1 paragraph 5 4 18 SEB Div
29. isione Elettronica e Sistemi DISPLAY AND PROGRAMMING Equivalent information and set up related to relay R1 is available for the relays R2 R3 and R4 just changing the relay identification F1 OUTPUT RELAY R1 QUIESCENT STATUS programmable R1 NORM xxx Programming of the R1 relay status when no START or TRIP conditions are activated none of the measured voltages exceed their thresholds NORM OFF normally de energized energized status on activation NORM ON normally energized de energized status on activation F2 OUTPUT RELAY R1 ACTIVATION ON THRESHOLD U lt STATUS programmable Rl U lt XXXXX Programming of the R1 output relay activation START TRIP NONE when one of the line voltages is below the programmed threshold U lt The parameter xxxxx is selectable as the following START instantaneous output relay R1 activation when one of the measured line voltage is below the programmed threshold U lt TRIP output relay R1 activation when one of the measured line voltage is below the programmed threshold level U lt for at least TI or TI TA seconds NONE no activation related to threshold U lt F3 F7 OUTPUT RELAY ACTIVATION ON THRESHOLD U lt lt U gt U gt gt Uo gt and Uo gt gt STATUS programmable Rl U gt gt R1 U lt lt Rl Uo gt XXXXX XXXXX XXXXX Programming of the output relay activation STAR TRIP NONE when one of the measured line voltages is below the thresholds U lt lt or exceeds the th
30. least 5 minutes or when the RESET push button has been pressed The displayed information is function of the protection relay status NORMAL FUNCTIONING During this state the following information can be visualized as defined by set up e Protection function ANSI code the display shows the ANSI codes of the selected functions ref C1 FUNCTION SELECTION e Measured voltage the display shows one of the measured voltages the voltage to be visualized is selected by operator ref D4 The voltage is visualized as primary value if the selection of the voltage to be visualized refers to a voltage not measured depending on FUCTION SELECTION no values are presented ON TRIP CONDITION When a trip condition occurs the protection relay visualizes the TRIP message that includes the threshold related to the trip the displayed messages are as the following TRIP TRIP TRIP TRIP U gt Uo gt gt U lt lt Uo gt The information of the trip as well the glowing of the related LEDs is displayed until the RESET push button is pressed If a new trip condition occurs the displayed information will be updated information related to previous trips are recorded in EVENTS memory FAULT CONDITION When a permanent or temporary fault condition is detected by the self diagnosis module the following message is displayed FAIL eeeceece PILOT Detected fault condition on pilot wire the function related to DIG1 digital input is suspend
31. lowing points references E1 E5 are effective for all the thresholds U lt lt U gt U gt gt Uo gt Uo gt gt just taking into consideration the change of the threshold identification with limits as presented in table A E1 THRESHOLD LEVEL SET UP programmable U lt ccc n nn U lt threshold identification U lt lt U gt U gt gt Uo gt Uo gt gt ccc ON enabled threshold OFF disabled threshold available but not active n nn threshold level expressed in terms of relative values Un threshold U lt U lt lt U gt U gt gt Uon threshold Uo gt Uo gt gt Examples 16 SEB Divisione Elettronica e Sistemi DISPLAY AND PROGRAMMING U lt ON U gt gt OFF Uo gt gt ON 0 50 1 50 1 00 E2 THRESHOLD LEVEL IN PRIMARY VALUES not programmable U lt XXXXXX V The programmed threshold ref E1 is shown in terms of primary voltage the value depends on the programmed VT s primary values ref D3 and D4 paragraph 5 5 U lt threshold identification U lt U lt lt U gt U gt gt Uo gt Uo gt gt XXXXXX threshold level expressed in Volts primary values E3 TIME DELAY SET UP programmable TI eeeee XX XX S Set up of time delay to the activation TRIP of the programmed output relays when the measured voltage exceeds the threshold level Parameter TI eeeee time delay characteristic For U lt U gt and Uo gt thresholds the time delay can be selected between one of the follo
32. nctions cannot be activated on residual voltage thresholds Uo gt and Uo gt gt When the selected function of the protection relay includes only line voltage measurement see selection table par 5 4 C1 the set ups related to special function are not shown H1 TRIP INHIBITION WHEN ALL MEASURED VOLTAGES ARE LOWER THAN 0 2 Un programmable INHIBIT U lt lt lt XXX Programming of TRIP inhibition of the protection relay wnen ALL THE MEASURED LINE VOLTAGES are lower than 0 2 Un voltage absence TRIP inhibition The parameter xxx can selected between the following OFF disabled function the protection relay operates normally and when undervoltage thresholds are activated the protection relay TRIPs when one or more of the measured line voltages are below the programmed thresholds U lt and or U lt lt ON enabled function the protection relay does NOT TRIP on activated undervoltage thresholds when ALL the measured line voltages are below the 0 2 Un value NOTE when activated the INHIBIT U lt lt lt function please take into consideration the following 21 SEB Divisione Elettronica e Sistemi DISPLAY AND PROGRAMMING a if one or more output relays are programmed to trip on START condition of U lt and U lt lt thresholds for threshold set up ref F2 and F3 these relays will trip as the START condition is detected and activated without any delays b the time delays on the TRIP conditions related to thresh
33. olds U lt and U lt lt should be programmed at least 60 ms 0 06 s to avoid inopportune trips of the output relays related to the thresholds due to transient decrease of voltages on the plant H2 LOGICAL FUNCTIONS ON UNDERVOLTAGE THRESHOLDS programmable 3 U lt U lt lt YYYYYY Programming of logical functions on undervoltage thresholds the functions refer only on phase voltages special functions do not act on the residual voltage thresholds The parameter yyyyyy can selected between the following NORMAL standard operation of the undervoltage thresholds the programmed TRIP output relays on U lt and or U lt lt trip when at least one of the measured phase voltage is below the threshold values DISABLED the trip of the output relays related to U lt and U lt lt thresholds is disabled when ALL the measured phase voltages are below the threshold values ENABLED the trip of the output relays related to U lt and U lt lt thresholds is enabled only when ALL the measured phase voltages are below the threshold values NOTE the DISABLE and ENABLE conditions are evaluated independently for each threshold U lt and U lt lt therefore depending on the measured voltages could be disabled or enabled the trip related to U lt threshold and not the trip on U lt lt threshold e g all measured voltages are lower than U lt value but one of them is not lower than the U lt lt threshold value About the time delays rela
34. reshold U gt or U gt gt and when the measured residual voltage exceeds the threshold Uo gt or Uo gt gt TEST RI XXXXXXXX Example F8 TEST OF OUTPUT RELAY R1 See paragraph 4 4 19 SEB Divisione Elettronica e Sistemi DISPLAY AND PROGRAMMING 5 8 Digital inputs function programming fig 2 For each digital input one of the following functions are selectable a additional time delay related to one or more thresholds b ON OFF threshold C STATUS function recording of measures on external command d pilot wire fault monitoring only DIG2 monitors DIG1 When function a is programmed a message is displayed at ref E5 par 5 6 When the function of more than one digital input refers to the same threshold the priority will be the following a OF selection threshold disabled has the priority on TA function additional time delay b the ALL selection ALL the thresholds has the priority on single threshold selection G1 DIGITAL INPUT DIG1 SET UP programmable DIGI cc XXXXXXXX Programming of the function related to digital input channel 1 DIG1 Parameter cc programming of the condition that activates the function related to digital input DIG1 the condition is selectable between HI and LO Parameter xxxxxxx programming of the function related to digital input DIG1 the following functions are selectable NONE no functions active related to digital input DIG1 TA U lt additional
35. ted to U lt and U lt lt threshold please refer to the NOTE at point H1 TRIP INHIBITION H3 LOGICAL FUNCTIONS ON OVERVOLTAGE THRESHOLDS programmable 3 U gt U gt gt YYYYYY Programming of logical functions on overvoltage thresholds the functions refer only on phase voltages special functions do not act on the residual voltage thresholds The parameter yyyyyy can selected between the following 22 SEB Divisione Elettronica e Sistemi DISPLAY AND PROGRAMMING NORMAL standard operation of the overvoltage thresholds the programmed output relays on U gt and or U gt gt trips when at least one of the measured phase voltage is higher than the threshold values DISABLED the trip related to U gt and U gt gt thresholds is disabled when ALL the measured phase voltages are higher than the threshold values ENABLED the trip related to U gt and U gt gt thresholds is enabled only when ALL the measured phase voltages are higher than the threshold values NOTE the DISABLE and ENABLE conditions are evaluated independently for each threshold U gt and U gt gt therefore depending on the measured voltages could be disabled or enabled the trip related to U gt threshold and not the trip on U gt gt threshold e g all measured voltages are higher than U gt value but one of them is not higher than the U gt gt threshold value About the time delays related to U gt and U gt gt threshold please refer to the NOTE at point H1
36. time delay on threshold U lt TA U lt lt additional time delay on threshold U lt lt TA U gt additional time delay on threshold U gt TA U gt gt additional time delay on threshold U gt gt TA Uo gt additional time delay on threshold Uo gt TA Uo gt gt additional time delay on threshold Uo gt gt TA ALL additional time delay on all thresholds OF U lt threshold U lt disabled OF U lt lt threshold U lt lt disabled OF U gt threshold U gt disabled OF U gt gt threshold U gt gt disabled OF Uo gt threshold Uo gt disabled OF Uo gt gt threshold Uo gt gt disabled OF ALL all thresholds disabled STATUS activation of status function see paragraph 1 20 SEB Divisione Elettronica e Sistemi DISPLAY AND PROGRAMMING G2 DIGITAL INPUT DIG2 SET UP programmable DIG2 cc XXXXXXXX Programming of the function related to digital input channel 2 DIG2 the selections available are the same as presented for DIG1 ref G1 plus the following MONITOR activation of pilot wire monitor function G3 DIGITAL INPUT DIG3 SET UP programmable DIG3 cc XXXXXXXX Programming of the function related to digital input channel 3 DIG3 the selections available are the same as presented for DIG1 ref G1 5 9 Special functions fig 2 The special functions can be activated on under and overvoltage thresholds U lt U lt lt U gt U gt gt related to the line measured voltages U1 U2 and U3 the special fu
37. ual voltage VT the value is programmable from 000001 to 999999 V D5 STANDARD DISPLAY SELECTION programmable DISPLAY eeeeeeee It allows to select the standard displayed information ref A1 when no trip condition occurs and no fault condition have been detected by the self diagnosis module the available selections are the following 15 SEB Divisione Elettronica e Sistemi DISPLAY AND PROGRAMMING ANSI displays of ANSI code U1 displays measured voltage U1 U2 displays measured voltage U2 U3 displays measured voltage U3 Uo displays measured residual voltage Uo The voltages can be line to line or line to neutral depending on VT s or relay insertion The list of the selectable voltages depends on the programmed FUNCTION SELECTION ref C1 the voltage is displayed in primary values the value depends on D3 and D4 set ups Selection examples DISPLAY DISPLAY DISPLAY ANSI Ul Uo D6 DISPLAY CONTRAST LEVEL programmable CONTRAST LEV x The display contrast level is programmable from 0 to 9 The backlighted display is switched off if no push button is pressed for at least 5 minutes when one of the front panel push button is pressed the display is switched on 5 6 Thresholds and time delays set up fig 2 In the programming session are displayed only the thresholds available depending on FUNCTION SELECTION set up ref C1 paragraph 5 4 The information and set ups related to threshold U lt in the fol
38. wing INDIP independent time delay DIP A time delay as curve A IEC 255 4 inverse time DIP B time delay as curve B IEC 255 4 very inverse time DIP C time delay as curve C IEC 255 4 extremely inverse time For the remaining thresholds the TI parameter is fixed as INDIP independent time Parameter xx xx Time independent time delay seconds to activate the programmed output relays the output relay trips when the measured voltage exceeds the threshold level for at least xx xx seconds programmable from 00 02 to 99 99 s Time dependent value of the parameter K see formulas paragraph 7 TI DIP B TI DIP A TI INDIP 02 50 K 10 00 K 03 25 5 NOTE the index K or s is shown coherently to the selected time delay characteristic when the push button ENTER is pressed 17 SEB Divisione Elettronica e Sistemi DISPLAY AND PROGRAMMING E4 ADDITIONAL TIME DELAY SET UP programmable The selection is displayed only when a TIME INDEPENDENT characteristic has been selected TI INDIP at ref E3 when TIME DEPENDENT characteristic has been programmed the selection will not be displayed TA U lt XX XX 5 The additional time delay TA is programmable from 00 00 to 99 99 seconds please note that at least one of the digital inputs should be programmed to activate time delay function ref G1 G2 G3 paragraph 5 8 The additional time delay TA is added to the time delay TI to obtain the output relay trip when the TI TA time exp
39. without the express written permission of SEB Divisione Elettronica e Sistemi SEB Divisione Elettronica e Sistemi GENERAL CHARACTERISTICS 1 GENERAL CHARACTERISTICS The protection relay UAR4N performs functions such as under and overvoltage and residual overvoltage relay the user can select one of the functions listed in the table below Fumetto ans Meesured voltages Undervoltage 2 or 3 phase Overvoltage 2 or 3 phase U1 U2 U3 Stator earth fault 95 residual voltage Under and overvoltage 2 or 3 phase 27 59 59N U1 U2 U3 Uo residual overvoltage Under and overvoltage 2 or 3 phase stator earth fault 95 residual voltage se a ake eat Voltage unbalance o U1 U2 U3 All the set up and measured parameters can be viewed on the front panel display and transmitted on the RS485 communication serial port THRESHOLDS the following thresholds are available e undervoltage thresholds U lt U lt lt e overvoltage thresholds U gt U gt gt e residual overvoltage Uo gt Uo gt gt The available settings for each threshold are listed in Table A Related to each threshold partial and total counters of TRIP conditions are available TRIP DELAYS a programmable time delay TI is available for each threshold it can be programmed as definite time or dependent time in compliance with IEC 255 4 standard For each threshold programmed as definite time an additional programmable time delay TA is availabl
40. ystems PILOT WIRE FAULT MONITORING when the function is programmed the digital input DIG2 is used to control the correct functionality of the pilot wire Digital input DIG2 is always expected to be complementary of DIG1 input HI LO or LO HI to identify faults on pilot wire The fault condition is reported as detected by the self diagnosis module but the protection functions are not suspended only the functions related to DIG1 digital input are suspended as the DIG1 status cannot be longer considered as true The fault condition is reported when DIG1 and DIG2 signals are not complementary for more then 100 ms REMOTE COMMUNICATION the opto insulated serial port RS485 can communicate with a personal computer or a remote control and monitoring system equipped with an RS485 interface or with a standard RS485 RS232 converter It is possible to select the communication standard between STANDARD ASCII 7 bit Seb protocol or MODBUS ASCII mode SLAVE All the set up and measured parameters can be transmitted on the RS485 communication serial port when communication is active LED REMOTE glows the operator on front panel can view the relay set up but changes of parameters are disabled ENTER and buttons disabled SPECIAL FUNCTIONS the following special functions can be activated by the operator on the measured phase voltages special functions do not act on the residual voltage e trip inhibition when all measured line voltages ar
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