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USER MANUAL - seb barlassina

1. 1 ANSI ALTERNATIVE FAIL BLOCK Ua XX XXX DISPLAYS eeeeeeee U lt V 1 B2 B3 B4 B5 B6 B7 CU90N PROTOCOL BAUDRATE NR RELAY SER NR SW REV dd mm yy YYYYYYYY nnnn XXX 277222227 22 22 hh mm ss C1 FUNCTION Selection function aaaaaaaa REGOL EQUALIZ C2 INSERT Selection insertion aaaaaaaa UNIPOL BIPOLAR 2TRAFO SET UP NOMINAL _ Nominal data VALUES FIG 2 and 4 PARAM PARAMETERS set up SE UP FIG 2 and 4 RELAYS OUTPUT RELAYS set up FUNCTION FIG 2 and 4 DIGITAL DIGITAL INPUTS set up INPUT FIG 2 and 4 J1 CONFIRM PROG MEASURES SIGNALS Display of SIGNAL and OUTPUT RELAYS status amp EVENTS STATUS FIG 3 and 5 EVENTS Display of EVENTS data FIG 3 and 5 COUNTERS Display of COUNTERS data FIG 3 and 5 Figure 1 16 DISPLAY AND PROGRAMMING SEB Divisione Elettronica e Sistemi 2 eunDi J AYN ls OL 50dd NUIANOI Lr SINANI 5IG 2914 INLIOIG 9
2. WYON yu LISAL Id vu NIE vu ANI va PI vu lt lt vu n vu gt N vu WIA vu NOV vu pa WAON LISAL lt ldl ca MIE u ANI u PI lt lt I n gt u NICO u NOV u u WYON 24 1542 Id 24 NIE ca ANI ca PI 24 lt lt I cad n eu gt 0 ZI NOV cu XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX WYON NOILONOA IH 1641 lt lql TA NIE Tad ANI Ta PI Iu lt lt I Ta n Ta gt N TA NIC I NOV Iu Ta 5 114 Old 64 84 Zd 94 SA vd d ld WISVNH ANI MIE WOO MIE sod MIE lt lt Wid MOOT ava dei ala o UUU S XX XX ur uu u uu u uu u Ur uu u uf uu u uf uu u ANIO PI IL lt 992 lt lt I el n gt N TIOHSHYHL 584 SLI 594 SS svi sea sz 819 S 99 90 8 222 22 S X XXX ZIVOANAL OL WOOL 29999 IL WVuVd LEI 164 lla dA un uu u 22272 dA XXX X uf uuu u ZNV IOO8W dn Las 27 SNI IZ
3. Wvuvd 484 dvi dea dla U 20999999 A XXXXXX V A XX XXX Sun IVA LSVHLNOO AV IdSIG urad uN ul V TIVNIWON dn Lds 90 La L 17 DISPLAY AND PROGRAMMING SEB Divisione Elettronica e Sistemi ss ww uy 9000 L 2999 d 1 0999 ANIL Did LOL HASNO HASNO HONNO HONNO SH HLNOOO ZH SY va 8a SS Uu uu uni pp MM 5IG MM 291 MM Ur 22 2 QUTI TH eyed TH TH TH TH MI TH 99 GLO YLO co LLO 09 ur 22 2 1 2242 uuuuuuuu x t r dA 22272 dA 27772 XXX UA XX X 0090992920 IH DIO TH TH
4. 12 44 8 1 11 0 380 lt 4 12 0 125V lt U3 16 0 380V 17 0 125V lt U4 DIG3 COKE 4 Uaux Q l R1 R2 R3 R4 R5 TEST LINE H VOLTAGE REGULATOR ANSI 90 2 TRANFORMERS insertion Fig 7 52 SEB Divisione Elettronica e Sistemi INSTALLATION 12 4 8 R2 0 380V 0 125V VI U4 LLL gt 11 0 380V Go 12 0 125V lt gt R3 R4 lt lt DIG3 CHE ees gt Uaux R5 po DE TEST een 45 lt lt LINE H D R S 4 en EDs 22 5 VOLTAGE EQUALIZING ANSI 25A Fig 8 53 SEB Divisione Elettronica e Sistemi INSTALLATION 172 9 Dimensioni meccaniche Case outlines N 4 fori 24 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 54 SEB Divisione Elettronica e Sistemi INSTALLATION Other circuits output relays etc It is suggested to terminate the current wiring using plug terminals Minimum suggested wire cross section 1 5 mm 83 Relays and R4 Signaling Command set up The CU9ON unit is supplied with and R4 relays configured as SIGNALING RELAYS with 2 change over output contacts with breaking capability equals to 0 2 A at 11
5. B Vp programmed reference voltage Un Va measured voltage Un Z current compensation coefficient la measured current input 11 In a insensibility degree The issue of commands will continue as long as the module of B is higher than 0 7 an output relay can be activated to signal the regulating process in progress selection IB ref F10 paragraph 6 6 The type of the issued command is function of the B sign B gt 0 LOWER command DIM B 0 RAISE command AUM SEB Divisione Elettronica e Sistemi GENERAL CHARACTERISTICS Two set up values are available Vp1 Z1 and Vp2 Z2 and selectable by an external command digital input to take into consideration two different configuration of the installation The maximum allowed value for the compensation current la can be defined threshold la when the measured current exceeds the la threshold the compensation algorithm will consider la la gt When a command AUM or DIM is issued the related counters partial and total are increased there are also available counters related to the command issue under normal condition CMNOR and counters related to command issue under overload condition CMSVR where overload condition is detected when the flowing current is higher than I threshold Command timing The duration TCOM of the AUM DIM commands is programmable definite time to match the characteristics of the tap changer The time delay between two co
6. 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 Programming of the R1 relay quiescent status NORM OFF normally de energized energized status on activation NORM ON normally energized de energized status on activation F2 OUTPUT RELAY ACTIVATION FOR COMMANDS AUM E DIM programmable F2 F3 R1 AUM R1 DIM XXXXXXXX Output relay R1 programmed to issue the AUM or DIM command the same relay cannot be programmed for both functions The parameter xxxxxxxx is selectable as the following ON R1 output relay activation to issue the command NONE no activation 42 SEB Divisione Elettronica e Sistemi VOLTAGE EQUALIZING MODE PARAMETERS SET UP F4 F5 OUTPUT RELAY ACTIVATION ON THRESHOLDS STATUS U lt AND U gt programmable F4 F5 U lt U gt XXXXXXX XXXXXXX Programming of the R1 output relay activation NONE ON on the thresholds status The parameter xxxxxxxx is selectable as the following ON R1 output relay activation on the threshold NONE no activation Examples R1 U R1 U ON NO AZION F6 OUTPUT RELAY ACTIVATION WHEN EQUALIZING OPERATIONS ARE DISABLED programmable Rl BLK Programming of the R1 output relay activation NONE ON when the regulation operations are disa
7. Current compensation coefficient Z1 0 042 Vp Reference voltage Vp2 1 Un Current compensation coefficient Z2 0 042 Vp Insensitivity degree INS 0 016 Vp Time delay curve TI DIP E Time delay parameter TI K 60s Command length TCOM 1 56 Minimum time delay between 2 commands 5s Undervoltage threshold U lt 0 9 Un Overvoltage threshold U gt 1 2 Un Maximum compensation current threshold la gt 0 72 In Overload condition threshold I gt 0 86 In Overcurrent threshold function disabled gt gt 0 94 In Reverse power angle 150 Unbalanced current threshold Id 0 1 In Time delay Id TI Id 55 Overcurrent disabling BLK gt gt ON Tap changer signal inconsistency disabling BLK POS ON Command inconsistency disabling BLK COM ON 58 SEB Divisione Elettronica e Sistemi SET UP EXAMPLE FOR VOLTAGE REGULATOR Reverse power disabling BLK INV Function relay R1 Function relay R2 Function relay R3 Function relay R4 DIG1 DIG2 DIG3 Counters ON AUM Norm OFF DIM Norm OFF B gt Norm OFF BLK Norm OFF ESTR POS Active status INTER Active status ESTR NEG Active status All resetted This set up parameters have no influences on the operations of the CU90N unit with this set up and application 59 SEB Divisione Elettronica e Sistemi TECHNICAL CHARACTERISTICS 10 TECHNICAL CHARACTERISTICS Measuring inputs Rated voltage Un programmable Ther
8. Sed DIVISIONE ELETTRONICA E SISTEMI CU90N VOLTAGE REGULATING UNIT VOLTAGE EQUALIZING UNIT USER MANUAL P500D818 August 2004 SEB Divisione Elettronica e Sistemi INDEX INDEX 1 GENERAL GCHARAGCTERISTIGS Ld eem tant cce estie tem ila 1 1 4 Voltage REGULATION mode ANSI 90 4 1 2 Voltage EQUALIZING mode ANSI 25 7 2 FRONT PANEI KEYS oiu dl test 9 3 2 castors 10 4 PROGRAMMING AND 5 lt 11 4 1 How to program the Unit serenata 11 4 2 Howto modify a visualized 2 20000022 12 4 3 m 12 T4 TeldyS zeit tiet teret terres tette 13 5 DISPLAY AND PROGRAMMING 000000010002 14 5 1 Standa rd diSplay ARTRERICP C rn 14 52 Visualization iene 16 53 xAddress andime f9 T ea EEEE 20 54 Operating mode selection and insertion fig 1 22 6 VOLTAGE REGULATING MODE PARAMETERS 23 6 1 Nominal values set up fig 2 23 6 2 Voltage regulatio
9. 05 00 s EST MINIMUM TIME DELAY BETWEEN TWO CONSECUTIVE COMMANDS programmable To XX XX S Set up of the minimum time delay between the issue of two consecutive commands the set up is present only with dependent time delays selection DIP I and DIP E at reference E1T programmable 00 10 99 99 s resolution 0 01 s Example TO 10 00 s 6 4 Thresholds set up fig 2 E1S UNDERVOLTAGE THRESHOLD SET UP programmable U n nn Un n nn threshold value expressed as Un programmable 0 70 1 10 Un resolution 0 01 Un 26 SEB Divisione Elettronica e Sistemi VOLTAGE REGULATING MODE PARAMETERS SET UP When the measured voltage exceeds the threshold value U lt the regulation function will be temporary disabled Command AUM DIM issue disabled the threshold is always active U lt 0 80 Un E2S OVERVOLTAGE THRESHOLD SET UP programmable Example U gt n nn Un n nn threshold value expressed as Un programmable 0 90 1 50 Un resolution 0 01 Un When the measured voltage exceeds the threshold value U gt the regulation function will be temporary disabled Command AUM DIM issue disabled the threshold is always active E3S MAXIMUM COMPENSATION CURRENT THRESHOLD programmable gt n nn In n nn threshold value expressed as In programmable 0 10 9 99 In resolution 0 01 In When the measured current la transducer 11 exceeds the threshold value the regulation algorithm see formula in
10. SNI TH 9999 TH TH SINHAN 10 99 so o co LO RX KRF A A A SOLWLS g XX X Ad XXX X TN XXX X e SINANI vd SOIVIS MM MM INLIOIG cN LN 999 pH 9999 CI SOLVLS TI SAVIHI 241 LW SOLVLS SOLVLS SINHAH 9 TOHSHYHL S IVNDIS SH ns VN 7 3YNDIH wo Address and time fig 1 B1 UNIT MODEL not programmable 5 3 CUSON 20 SEB Divisione Elettronica e Sistemi DISPLAY AND PROGRAMMING B2 B3 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 CU9ON unit B4 ADDRESS programmable NR RELAY 001 Programmable address from 001 to 255 The number is used on RS485 port to address the CU90N unit when other CU90N units or SIGMA N 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 Zi ed Li dd mm yy hh mm
11. UP programmable DIG2 cc 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 Programming of the function related to digital input channel 3 DIG3 the selections available are the same as presented for DIG1 ref G1 6 8 Parameter values visualization fig 3 L1 L2 THRESHOLDS STATUS The actual status of the I gt gt and Id thresholds is displayed The Id threshold status is displayed only if insertion 2TRAFO has been selected at reference C2 par 5 4 For each threshold the status can show one of the following values ON active threshold OFF disabled threshold programmed OFF Examples L1 L2 I gt gt Id gt ON OFF L3 L4 L5 L6 L7 STATUS OF THE BLOCKING CAUSES The programmed status of each condition which will cause the disabling of the regulation operations ON condition programmed enabled 33 SEB Divisione Elettronica e Sistemi VOLTAGE REGULATING MODE PARAMETERS SET UP OFF condition programmed disabled Examples BLK I gt gt BLK Id gt BLK POS BLK COM BLK INV ON OFF ON OFF OFF The BLK Id gt display is presented only if the 2TRAFO insertion has been selected ref C2 paragraph 5 4 M1 2 OUTPUT RELAY STATUS The actual sta
12. Z LH SNI IH dA TH 9999 TH Ta SINHIAH 60 80 10 99 so o co LO XX XX4 A A AKKKKA SOLWLS XX X nI XX X PI g XX X4 AG XXX X n SAINOSVAN Sd vd d 50 515 MM IVLIDIO cN LN 999 pi CI 50115 999 Cad TI SAVIHI LN snjeqs snjeqs snjeqs snjeqs snjeqs 503225 snjeqs SNLWLS SNLWLS 9 ANI VIE WOO ATE Sod MIE Wid I MTA PI I ILOHSWHHIL S IVNDIS SH 0s VN Z1 91 91 v1 1 21 V1 2 3unoiJ uo 18 DISPLAY AND PROGRAMMING SEB Divisione Elettronica e Sistemi S OL eun6i4 7290 Lr XXXXXXXX XXXXXXXX SINANI DId 2014 IVLIOIG 9 29 LS XXXXXXXX 299 NYON pu 1544 lt lal pu NIE va n vu gt N vu NIC vu NOV vd va AKKAKKAKA XXXXXXXX XXXXXXXX XXXXXXXX XXXXXX
13. characteristics and tap changer two transformers can be managed with the same CU90N regulating unit With reference to figure 7 the CU9ON unit controls the two transformers TR1 and TR2 reading the currents flowing in TR1 and TR2 The AUM DIM commands are delivered to both transformers the control inputs of the two tap changer must be connected in parallel taking into consideration for the regulating algorithm the current flowing in TR1 SEB Divisione Elettronica e Sistemi GENERAL CHARACTERISTICS The CU9ON unit verifies that the difference between the current flowing in TR2 and TR1 will be lower then the programmable threshold Id gt The current threshold Id gt defines the maximum allowed vector difference between the current la flowing in TR1 I1 input and the current 12 flowing in TR2 I2 input The threshold Id can be programmed to activate an output relay for alarm signaling with related programmable time delay to activation 1 2 Voltage EQUALIZING mode ANSI 25A The CU9ON unit is used to equalize the generator voltage to the grid voltage for automatic paralleling of generators see insertion fig 8 The CU90N unit delivers commands to generator voltage regulation unit when the measured voltage Va generator side transducer U3 differs from the measured voltage VI network side transducer U4 more than a define value The degree of insensibility a must be programmed depending on the regulator characte
14. paragraph 1 1 utilizes a current value equals to la gt independently from the effective current value The threshold is always active Example la 1 20 In E4S OVERLOAD CONDITION THRESHOLD programmable I gt n nn In n nn threshold value expressed as In programmable 0 10 9 99 In resolution 0 01 In When the measured current la transducer 11 exceeds the threshold value I the CU90N unit considers the AUM or DIM commands issued under overload conditions the issued command counter CMSVR will be increased instead of the counter CMNOR The threshold is always active E5S OVERCURRENT THRESHOLD programmable I gt gt ccc n nn In 27 SEB Divisione Elettronica e Sistemi VOLTAGE REGULATING MODE PARAMETERS SET UP ccc ON enabled threshold OFF disabled threshold available but not active n nn threshold value expressed as In programmable 0 10 9 99 In resolution 0 01 In When the measured current transducer I1 exceeds the threshold value I gt gt the regulation function will be temporary disabled command AUM DIM issue disabled on the front panel the LED named BLK will glow and a message will be displayed E6S UNBALANCED CURRENT THRESHOLD programmable The set up is presented only if the 2TRAFO insertion has been selected at reference C2 The threshold defines the maximum vectorial difference between the currents flowing in the two transformers the threshold represents the module of the curren
15. relays can be programmed to issue raise AUM or lower DIM commands the commands can be issued as SEB Divisione Elettronica e Sistemi GENERAL CHARACTERISTICS e definite time e dependent time as function of the voltage difference e continue commands The output relays can also be programmed for alarm tripping on the following conditions undervoltage U or overvoltage U gt overcurrent threshold gt gt unbalanced currents thresholds Id reverse power the regulating operations remain enabled regulating function disabled for any cause condition B gt 1 voltage regulation or equalization in progress The output relays activation related to the thresholds I gt gt Id and to the reverse power condition detection are available only with the VOLTAGE REGULATOR ANSI 90 operation mode 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 With the VOLTAGE REGULATOR operating mode partial and total counters of the issued commands are available under normal operation and under overload operation DIGITAL INPUTS there are available 3 digital inputs to activate the following functions when enabled by the programmed set up e on off voltage regulating or equalizing function e tap changer position VOLT
16. second set of parameters Vp2 and Z2 Vp2 programmable 0 800 1 200 Un resolution 0 010 Un 22 programmable 0 000 0 600 Vp resolution 0 002 Vp2 22 1 100 0 098 6 3 Regulation time delay programming fig 2 Note the time delays refer to the issue of the commands AUM and DIM Example E1T TIME DELAY BETWEEN TWO COMMANDS programmable TI eeeee XXX X S Programming of the time delay between two consecutive commands Parameter TI eeeee time delay characteristic INDIP independent time delay DIP I inverse time delay DIP E exponential time delay CONT continuous command Formulas of the time delays are described in paragraph 1 1 Parameter xx xx 25 SEB Divisione Elettronica e Sistemi VOLTAGE REGULATING MODE PARAMETERS SET UP Time independent time delay seconds between the issue of two consecutive commands programmable from 000 1 to 999 9 s resolution 1 s Time dependent and DIP E value of the parameter K see formulas paragraph 1 1 programmable from 1 to 200 s resolution 1 s Continue command not applicable no influences fixed to 0 0 s DIP I TI CONT TI INDIP 002 0 K 000 0 S 003 25 E2T COMMAND LENGTH programmable TCOM XX XX S Examples Set up of the command length commands AUM and DIM the programming is not presented when selected Tl CONT at reference E1T programmable 00 10 99 99 s resolution 0 01 s Example TCOM
17. the proper rack is supplied by SEB electronic unit CU90N with rear socket e transparent front panel for rack installation e blister with items 1 2 3 4 5 CS VERSION flush mounting installation electronic unit CU90N with rear socket transparent front panel for rack flush mounting installation n 2 brackets for flush mounting blister with items 1 2 3 4 5 blister with item 6 000000009 Sacchetto BLISTER 1 n 8 screws to fix wire terminals of current circuits 2 n 4 screws to fix the relay rear socket on the 19 rack or on the two brackets for flush mounting 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 terminals current 5 n 8 growers to be used to fix wire terminals current 6 items to fix the brackets for flush mounting only with CS version The knobs to fix the transparent front panel must be screwed through the panel the front panel itself the operation will create a screw thread in the plastic material and the knobs will never be missed NOTE The items related to current inputs are the standard supplied items with all SIGMA N protection relays but for
18. 0 Vac L R 40 ms 100000 operations Each and R4 relay 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 84 RS485 serial communication port The CU90N unit presents an insulated serial interface RS485 half duplex that allow the multi drop connection up to 31 protection units There are available 2 selectable communication protocols ref B2 paragraph 5 3 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 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 55 SEB Divisione Elettronica e Sistemi INSTALLATION 120 Ohm 120 Ohm CONTROLLORE PROTEZ 1 PROTEZ 2 PROTEZ 3 It is suggested to terminate the serial line with a resistance 120 1 4 W 56 SEB Divisione Elettronica e Sistemi SET UP EXAMPLE FOR VOLTAGE REGULATOR 9 SET UP EXAMPLE FOR VOLTAGE REGULATOR As a general example the set up of a CU90N unit operating as voltage regulating unit will be presented in the following The installation is repr
19. 3 Equalizing time delay programming fig 4 Note the time delays refer to the issue of the commands AUM and DIM Example E1T TIME DELAY BETWEEN TWO COMMANDS programmable TI eeeee XXX X S Programming of the time delay between two consecutive commands Parameter eeeee time delay characteristic INDIP independent time delay inverse time delay DIP E exponential time delay CONT continuous command Formulas of the time delays are described in paragraph 1 2 Parameter xx xx Time independent time delay seconds between the issue of two consecutive commands programmable from 000 1 to 999 9 s resolution 1 s Time dependent DIP I and DIP E value of the parameter K see formulas paragraph 1 1 programmable from 1 to 200 s resolution 1 s Continue command not applicable no influences fixed to 0 0 s TI DIP I TI CONT TI INDIP 002 0 K 000 0 s 003 2 S 40 Examples SEB Divisione Elettronica e Sistemi VOLTAGE EQUALIZING MODE PARAMETERS SET UP E2T COMMAND LENGTH programmable TCOM 8 Set up of the command length commands and DIM the programming is not presented when selected Tl CONT at reference E1T XX xx programmable 00 10 99 99 s resolution 0 01 s Example TCOM 05 00 s EST MINIMUM TIME DELAY BETWEEN TWO CONSECUTIVE COMMANDS programmable To XX XX 5 Set up of the minimum time delay between the issue of two consecutive commands the set up
20. AGE REGULATOR mode selection of alternative parameters set Vp2 22 for voltage regulation e recording of measures on external event e pilot wire fault monitoring only digital input DIG2 For each digital input can be programmed the condition that activates the related functions HI voltage gt 20 V dc ac LO voltage 0 10 V dc ac The digital input acquisition is valid when the voltage value stays in the range HI or LO for at least 40 ms DISPLAY OF MEASURES the user can select the continuous display of a measured parameter such as e measured voltage e measured voltage difference SEB Divisione Elettronica e Sistemi GENERAL CHARACTERISTICS e measured line current only VOLTAGE REGULATION mode EVENTS information related to the last 8 events such as external anomaly detection alarm on thresholds gt gt or Id external command STATUS or POWER ON condition are recorded in the EEPROM memory Information includes the event code the activated relays if any the measured parameters the digital input status the main set up data and the 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 CU90N unit Detected fault conditions are reported by e diagnostic message on the display e glow of a red LED on front panel R5output relay drop off The fault condition signaling s
21. AND TEST 4 PROGRAMMING AND TEST The CU90N unit is easily programmable following the instructions in the next paragraphs e HOW TO PROGRAM THE UNIT e HOW TO MODIFY A VISUALIZED PARAMETER All parameters can be freely modified the proper unit set up as required by the plant management is submitted to the operator s judgment 41 Howto program the unit The programmable parameters are showed in Figures 1 2 3 4 and 5 at the following references B2 B7 unit protocol address RS485 and date time C1 C2 functional mode selection and insertion D1 D6 nominal values contrast etc E1 E8 functional parameters thresholds and enabling F1 F11 output relays functions G1 G3 digital input functions R1 R4 partial counters reset REGULATING mode only 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 unit set up 5 CONFIRM the new unit set up at the visualization CONFIRM PROG Fig 1 ref J1 within 5 minutes depressing the push buttons ENTER and up to visualize YES and ENTER again to confirm NOTE The unit will continue to operate using the previou
22. FRONT PANEL KEYS 2 FRONT PANEL KEYS The 5 push buttons on the front panel allow to visualize all the parameters and to modify the CU90N unit set up gt right arrow down arrow programming session activation or parameter confirmation change or increment of the selected parameter RESET VISUALIZATION OF PARAMETERS reset of the CU9ON unit ref par 4 3 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 3 4 and 5 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 unit 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 LED SIGNALING 3 FRONT PANEL LED SIGNALING POWER green FAIL red REMOTE red COM red AN EXT red BLK red 9 9 9 9 9 auxiliary supply available fault condition detected by SELF DIAGNOSIS software or by PILOT WIRE FAULT MONITORING function communication session active on RS485 port regulation or equalizing in progress B module gt 1 external anomaly condition detected regulation or equalizing operations disabled 10 SEB Divisione Elettronica e Sistemi PROGRAMMING
23. INAL LINE VOLTAGE SELECTION Un programmable Un XXX XX V Un nominal line voltage selection nominal secondary voltage of plant VT selectable between the followings 57 73 63 50 72 16 100 110 125 190 220 230 380 400 D3 PRIMARY PHASE CURRENT programmable In prim XXXX A Primary phase current value of the installed phase CT the value is programmable from 0001 to 9999 A D4 PRIMARY LINE VOLTAGE programmable Un prim XXXXXX V Primary voltage value of the installed line VT the value is programmable from 000001 to 999999 V D5 STANDARD DISPLAY SELECTION programmable DISPLAY It allows to select the standard displayed information ref 1 when no anomalies blocking condition occurs and no fault condition have been detected by the self diagnosis module the available selections are the following NORMALE displays ANSI 90 la displays the measured line current I1 transducer Va displays the measured line voltage U3 transducer Vp displays the programmed line voltage SEB Divisione Elettronica e Sistemi VOLTAGE REGULATING MODE PARAMETERS SET UP DV displays the computed voltage difference DV Va Vp Z Ia Vp ref paragraph 1 1 DISPLAY DISPLAY DISPLAY NORMALE Ia DV D6 DISPLAY CONTRAST LEVEL programmable CONTRAST LEV x The display contrast level is programmable from O to 9 The backlighted display is switched off if no push button is presse
24. XX WHON ISHL lt lal x Mid lt n ca gt cd NIG EU NOV cd ed AKAKAKAK XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX WYON 24 ISHL lt 191 za NIE cad n ceu gt N ZI NICO 24 NOV 24 AKAKARAK XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX WHON NOILONOA 1641 14 TW MIE Ta n TH gt N TA NIC Iu WAY TY Ta 84 14 94 SA d ld un uu uU un uu u lt a gt n TOHSAYHL Sca 519 Si 99200 6 22722 S X XXX ZIMOdWAL OL WOOL 99900 IL WNVuVd 164 124 22272 ZN IOD 4H 4010 1485 SNI dla AST oooooooo A XXXXXX A XX XXX SHN TVA LISVALNOO AV IdSIG urzd uf TWNINON LV ea La 40 145 340913 19 DISPLAY AND PROGRAMMING SEB Divisione Elettronica e Sistemi eJnBiJ ss ww uy AA 1 4 ANIL Did LOL HONNO HONNO SH HLNOOO SY eeeereee 721 8a ss uu uu TOIA QUTI TH eyed TH TH TH TH co LLO 00 60 80 un 2272 un 2272 uuuuuuuu CT 22272 UA XXX 00000000 TA TH TH DIO TH AVIHI TH
25. age condition U U alarm signaling for overcurrent condition I gt gt alarm signaling for current unbalance condition Id alarm signaling for reverse power even without disabling of the regulation operation e regulation operation disabled for any cause signaling of the condition B gt 1 regulation in progress 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 quiescent status NORM OFF normally de energized energized status on activation NORM ON normally energized de energized status on activation F2 F3 OUTPUT RELAY ACTIVATION FOR COMMANDS AUM E DIM programmable F2 F3 R1 AUM R1 DIM XXXXXXXX XXXXXXXX Output relay R1 programmed to issue the AUM or DIM command the same relay cannot be programmed for both functions The parameter xxxxxxxx is selectable as the following ON R1 output relay activation to issue the command NONE no activation 30 SEB Divisione Elettronica e Sistemi VOLTAGE REGULATING MODE PARAMETERS SET UP F4 F7 OUTPUT RELAY ACTIVATION ON THRESHOLDS STATUS U lt U gt gt gt Id programmable F4 F5 F6 F7 U lt U gt I gt gt gt XXXXXXX XXXXXXX XXXXXXX XXXXXXX Programming of the R1 output relay activation NONE ON on the thresholds status The parameter xxxxx
26. anger step lower than 3 3 times the tap changer step therefore we could choose a insensitivity degree equals to 1 6 0 016 Vp Maximum current compensation value la normally this current threshold is programmed equals to the nominal current of the transformer therefore la 0 72 In Overload condition threshold I normally this current threshold is programmed 1 2 times the nominal current of the transformer therefore I 0 86 In 57 SEB Divisione Elettronica e Sistemi SET UP EXAMPLE FOR VOLTAGE REGULATOR Overcurrent threshold I gt gt normally this current threshold is programmed 1 3 times the nominal current of the transformer therefore I gt 0 94 In The time delay between two commands is chosen exponential with a minimum time delay between two commands of 5 seconds and command length of 1 5 seconds In this example the digital input of the CU90N unit will be used for the acquisition of the tap changer position in order to disable the regulation function for changer position inconsistency Protocol STANDARD Nr relay 001 Serial number non programmable SW rev non programmable Date dd mm yy actual date Time hh mm ss actual time Function REGOL Insertion BIPOL Nominal current ref CT s secondary side 5A Nominal voltage ref VT s secondary side 100 V Nominal current ref CT s primary side 1000 A Nominal voltage ref VT s primary side 20000 V Display NORMAL Contrast 8 Reference voltage Vp1 1 Un
27. bled for under or overvoltage condition or from an external command The parameter xxxxxxxx is selectable as the following ON R1 output relay activation when operations are disabled NONE no activation F7 OUTPUT RELAY ACTIVATION WHEN EQUALIZATION OPERATIONS ARE IN PROGRESS programmable BI gt XXXXXXX Programming of the R1 output relay activation NONE ON when the equalization operations are in progress condition B 21 ref paragraph 1 2 The parameter xxxxxxxx is selectable as the following ON R1 output relay activation when operations are in progress NONE no activation Example R1 gt ON 43 SEB Divisione Elettronica e Sistemi VOLTAGE EQUALIZING MODE PARAMETERS SET UP F8 TEST OF OUTPUT RELAY R1 TEST RI XXXXXXXX See paragraph 4 4 Digital input function programming fig 4 For each digital input one of the following functions are selectable e on off voltage equalizing function e recording of measures on external event STATUS ref par 1 e pilot wire fault monitoring only digital input DIG2 G1 DIGITAL INPUT DIG1 SET UP programmable DIGI 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 function related to digital input DIG1 The following functions are selectabl
28. cie LLL LLL 45 FoU Nemo e 47 8 INSTALLATION 622255 230132 etse eeu Me ble aM D NEN E 49 9s Supplied Kite uan eot TT 49 D eCHDIIigun 0 suc siu tO Uds s iecur oa I sant RET lc Ee ES de 50 8 3 Relays R3 and R4 Signaling Command 55 8 4 RS485 serial communication port 55 9 SET UP EXAMPLE FOR VOLTAGE 57 10 TECHNICAL 8 2 2 2 2 21 eterne tnt sede seed 60 11 B bc 62 SEB Divisione Elettronica e Sistemi INDEX 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 without the express written permission of SEB Divisione Elettronica e Sistemi SEB Divisione Elettronica e Sistemi GENERAL CHARACTERISTICS 1 GENERAL CHARACTERISTICS The CU90N unit belongs to SIGMA N digital protection line and it performs functions as voltage regulating unit for transformers equipped with tap changer or voltage equalizing unit for generator paralleling jointly with the SCK4N unit it performs function as automatic synchronizing and coupler device The user can select one of the functional modes listed below Voltage regulating unit for tap changer control 2290 Voltage equalizer unit for automatic sy
29. d for at least 5 minutes when one of the front panel push button is pressed the display is switched on Examples 6 2 Voltage regulation parameters set up fig 2 The information refers to the set up of the parameters related to the voltage regulation mode for the meaning of the parameters please refer to paragraph 1 1 E1P REFERENCE VOLTAGE SET UP programmable 1 n nnn Un Set up of the reference voltage first set of parameters Vp1 and 21 Vp1 programmable 0 800 1 200 Un resolution 0 010 Un 1 1 050 Un E2P CURRENT COMPENSATION COEFFICIENT programmable 21 Set up of the current compensation coefficient first set of parameters Vp1 and Z1 Example 21 programmable 0 000 0 600 Vp resolution 0 002 71 0 152 Vp When Z1 0 000 the voltage regulation is not influenced by the current flowing in the transformer Example 24 SEB Divisione Elettronica e Sistemi VOLTAGE REGULATING MODE PARAMETERS SET UP E3P SET UP INSENSITIVITY DEGREE programmable INS n nnn Vp Set up of the insensitivity parameter as function of the regulation steps available see paragraph 1 1 INS programmable 0 008 0 030 Vp resolution 0 002 INS 0 020 Vp E4P PROGRAMMING OF THE 274 SET OF PARAMETERS programmable Example Vp2 Z2 n nnn Un Vp Set up of the reference voltage and of the current compensation coefficient related to the
30. e one of them NONE no functions active related to digital input DIG1 BLK EST disabling of the equalizing operations external command STATUS activation of status function see paragraph 1 G2 DIGITAL INPUT DIG2 SET UP programmable DIG2 cc 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 44 SEB Divisione Elettronica e Sistemi VOLTAGE EQUALIZING MODE PARAMETERS SET UP available are the same as presented for DIG1 ref G1 7 8 Parameter values visualization fig 5 THRESHOLDS STATUS Programmable thresholds are used when the CU90N unit is operating as voltage regulator ANSI 90 U lt and U gt threshold are always active 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 F1 N1 N2 DIGITAL INPUT STATUS The actual status of each digital input is displayed For each digital input the following information is presented e d
31. esented by a HV MV transformer equipped with tap changer with the following characteristics e Primary nominal voltage 150 kV e Secondary nominal voltage 20 kV e Nominal power 25 MVA e Secondary nominal current 722 A e VT son the secondary side 20 V3 0 1 N3 kV Ctson the secondary side 1000 5A On load tap changer range 5 step 1 96 The insertion diagram of the CU90N unit is presented in fig 6 When the HV MV transformer is working at the nominal condition the current measured by the CU9ON unit will be 0 72 In where In Comments on the set up Reference voltage the reference voltage will be the nominal voltage therefore Vp 1 Un where Un 100 V as the phase to phase voltage will be measured Current compensation coefficient Z it is supposed from information on the 20 kV distribution network that when the HV MV transformer delivers the nominal current it is necessary to have a secondary voltage at the transformer equals to 10396 of the nominal voltage in order to guarantee the nominal voltage condition in the worst point of the network Therefore the current compensation coefficient Z at the nominal current of the HV MV transformer equals to 0 72 In of the CU90N have to be programmed to 0 03 0 72 0 042 Vp Insensitivity degree the on load tap changer regulation step is equals to 1 of the nominal voltage the insensitivity degree should have to be programmed greater than 0 6 times the tap ch
32. external causes fig 2 The regulating operation of the CU90N unit can be disabled on external anomalies or commands ref paragraph 1 NOTE to allow the operation disabling due to tap changer signals inconsistency 3 digital input must be programmed for the functions ESTRPOS ESTRNEG and INTER see paragraph 6 7 To allow the operation disabling due to command inconsistency 2 digital input must be programmed for the functions ESTRPOS and ESTRNEG see paragraph 6 7 1 OVERCURRENT programmable BLK I gt gt CEC ccc ON enabled function when the current overcame the gt gt threshold OFF disabled function available but not active E2B TAP CHANGER SIGNALS INCONSISTENCY programmable BLK POS ccc ccc ON enabled function when tap changer signals are inconsistent OFF disabled function available but not active E3B COMMAND INCONSISTENCY programmable BLK COM ccc 29 SEB Divisione Elettronica e Sistemi VOLTAGE REGULATING MODE PARAMETERS SET UP ccc ON enabled function when command signals are inconsistent OFF disabled function available but not active E4B REVERSE POWER programmable BLK INV ccc ccc ON enabled function when reverse power is detected OFF disabled function available but not active 6 6 Output relays programming fig 2 The session allows to program the activation of the output relays R1 R2 R3 or R4 on AUM and DIM commands alarm signaling for overvoltage and undervolt
33. following messages will be presented BLOCK BLOCK BLOCK BLOCK U gt U lt gt gt BLOCK U gt disabled for overvoltage condition always active BLOCK U lt disabled for undervoltage condition always active BLOCK gt gt disabled for overcurrent condition if function enabled BLOCK AN EXT disabled for external anomaly detection if function enabled BLOCK INV ALIM disabled for reverse power condition if function enabled For the blocking function programming function ON OFF please refer to paragraph 6 5 only for the VOLTAGE REGULATION mode The message of the blocking cause will be shown as long as the blocking condition is present 14 SEB Divisione Elettronica e Sistemi DISPLAY AND PROGRAMMING FAULT CONDITION When a permanent or temporary fault condition is detected by the self diagnosis module the following message is displayed FAIL F PILOT Detected fault condition on pilot wire the function related to DIG1 digital input is suspended Corrective action verify pilot wire short or open circuit The string eeeeeeee can be HARDWARE Detected fault condition on hardware or software resources of the protection relay all functions are suspended Corrective action replace the unit and contact SEB post sales service 15 SEB Divisione Elettronica e Sistemi DISPLAY AND PROGRAMMING 5 2 Visualization structure
34. he currents measured coherently with the insertion selection at ref C2 paragraph 5 4 The current Iw represent the current 12 transducer 12 insertion BIPOL or Id module of the vectorial difference between la and 12 insertion 2TRAFO Q12 013 Q14 DIGITAL INPUTS STATUS ON EVENT El El E DIG1 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 Q15 Q16 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 6 10 Counters fig 3 In this section are displayed the total and partial counters of the command issued to the tap changer 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 session are used to control unauthorized access 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 R2 COUNTERS FOR COMMAND UNDER NORMAL CONDITIONS R1 R2 CMNOR CMNOR PEC T Display of the part
35. ial P and total counters of the command to the tap changer issued under normal condition current la lower then the threshold I gt When the value exceed 9999 the counter starts again from 0000 37 SEB Divisione Elettronica e Sistemi VOLTAGE REGULATING MODE PARAMETERS SET UP 4 COUNTERS FOR COMMAND UNDER OVERLOAD CONDITIONS R3 R4 CMSVR CMSVR Display of the partial P and total counters of the command to the tap changer issued under overload condition current la higher then the threshold I gt When the value exceed 9999 the counter starts again from 0000 R5 R7 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 38 SEB Divisione Elettronica e Sistemi VOLTAGE EQUALIZING MODE PARAMETERS SET UP 7 VOLTAGE EQUALIZING MODE PARAMETERS SET UP 7 1 Nominal values set up fig 4 01 NOMINAL LINE VOLTAGE SELECTION Un programmable Un V Un nominal line voltage selection nominal secondary voltage of plant VT selectable between the followings 57 73 63 50 72 16 100 110 125 190 220 230 380 400 D2 PRIMARY LINE VOLTAGE programmable Un prim V Primary voltage value of the installed line VT the va
36. igital input identification DIG1 DIG2 DIG3 e digital input status HI or LO P1 P2 P3 P4 MEASUREMENTS DISPLAY The actual values of the measured and computed parameters are displayed P1 P2 P3 yyyyyy V Measured voltage generator side Ua measured voltage network side UI computed voltage difference DV where DV Va Vp P4 B When VI 0 the computed values of DV and B are considered not meaningful therefore the message will be displayed at and P4 7 9 X Events fig 5 On the display are shown the memorized information related to the following events e operations disabled due to external anomaly ref paragraph 1 2 e external command STATUS e POWER ON 45 SEB Divisione Elettronica e Sistemi VOLTAGE EQUALIZING MODE PARAMETERS SET UP 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 The index 1 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 BLK U lt regulation operations disabled on threshold U lt BLK U gt regulation operations disabled on threshold U gt STATUS information recorded on external command POWER switch on of the unit auxiliary power For the events NONE a
37. ions Note 3 The output contacts of R3 and R4 relays can be configured as signaling or tripping relays 61 SEB Divisione Elettronica e Sistemi TABLES 11 TABLES Table A REGULATION MODE parameters Parameter Threshold Setting Resolution Vp1 Vp2 Voltage reference 0 80 1 20 Un 0 01 Un Current compensation 21 22 coefficient 0 000 0 600 Vp 0 002 Vp INS a Insensitivity degree 0 008 0 030 Vp 0 002 Vp Max current compensation la gt walle 0 10 9 99 In 0 01 In Overload condition threshold I gt command issue under 0 10 9 99 In 0 01 In overload conditions Overcurrent threshold dis regulation function disabling A etn Reverse power angle 180 180 1 Unbalanced current alarm Id gt threshold 2TRAFO 0 10 9 99 In 0 01 In Functional enable thresholds U gt Overvoltage threshold 0 90 1 50 Un 0 01 Un U lt Undervoltage threshold 0 70 1 10 Un 0 01 Un Time delay TCOM AUM DIM commands length 0 10 99 99 s 0 01 s Time delay selection INDIP INV EXP CONT Time delay between two commands time definite Soe one Minimum time delay between To two commands 0 10 99 99 s 0 01 s time dependent Characteristic constant K dependent time 1 200 8 ve Id Time delay threshold ld 0 02 99 99 6 0 01 s 62 63 SEB DIVISIONE ELETTRONICA E SISTEMI UFFICIO COMMERCIALE Via Segantini 5 20825 BARLASSINA MB tel 39 0362 5669 1 fax 39 0362 556622 web ww
38. is present only with dependent time delays selection DIP I and DIP E at reference E1T XX xx programmable 00 10 99 99 s resolution 0 01 s Example To 10 00 s 7 4 Thresholds set up fig 4 E1S UNDERVOLTAGE THRESHOLD SET UP programmable U lt n nn Un n nn threshold value expressed as Un programmable 0 70 1 10 Un resolution 0 01 Un When the measured voltage exceeds the threshold value U the equalizing function will be temporary disabled command AUM DIM issue disabled the threshold is always active Example U 0 80 Un E2S OVERVOLTAGE THRESHOLD SET UP programmable U n nn Un 41 SEB Divisione Elettronica e Sistemi VOLTAGE EQUALIZING MODE PARAMETERS SET UP n nn threshold value expressed as Un programmable 0 90 1 50 Un resolution 0 01 Un When the measured voltage exceeds the threshold value U gt the equalizing function will be temporary disabled command AUM DIM issue disabled the threshold is always active 7 5 Operation disabling on external causes This functionality is only used when the 9 unit is operating as voltage regulator ANSI 90 7 6 Output relays programming fig 4 The session allows to program the activation of the output relays R1 R2 R3 or R4 on AUM and DIM commands alarm signaling for overvoltage and undervoltage condition U gt U lt equalizing operations disabled for any cause signaling of the condition gt 1 equalizing in progress
39. lue is programmable from 000001 to 999999 V D3 STANDARD DISPLAY SELECTION programmable DISPLAY It allows to select the standard displayed information ref 1 when no anomalies blocking condition occurs and no fault condition have been detected by the self diagnosis module the available selections are the following NORMALE displays ANSI 25A Va displays the measured voltage generator U3 transducer VI displays the measured voltage network U4 transducer DV displays the voltage difference Va VI Examples DISPLAY DISPLAY DISPLAY NORMALE Va DV D4 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 39 SEB Divisione Elettronica e Sistemi VOLTAGE EQUALIZING MODE PARAMETERS SET UP 7 2 Voltage equalizing parameters set up fig 4 The information refers to the set up of the parameters related to the voltage equalizing mode for the meaning of the parameters please refer to paragraph 1 2 E1P SET UP INSENSITIVITY DEGREE a programmable INS n nnn Vl Set up of the insensitivity parameter as function of the voltage regulation system of the generator see paragraph 1 2 INS programmable 0 008 0 030 Vp resolution 0 002 Vp INS 0 020 VI 7T
40. mal withstand continuously Thermal withstand for 1 s Rated phase current In Thermal withstand continuously Thermal withstand for 1 s Rated frequency Primary CT s current 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 signaling relays R3 R4 R5 note 3 Mechanical life Digital inputs Number of inputs External control voltage Typical current sink Data transmission Standard Communication protocol Transmission speed Optional Auxiliary supply Range Frequency Vac Burdens min max Environmental conditions Operation Transport and storage Relative humidity without condensation Protection degree for flush mounting optional Weight 57 73 63 50 72 16 100 110 V 125 190 220 230 380 400 V 2 Un 2 Un 1A or 5A 4 In 100 In 50 60 Hz 1 9999 1 999999 V 4 41 5A 250 V change over 0 5A 0 2 A gt 106 3 as Uaux 2 RS 485 half duplex MOD BUS ASCII 300 9600 baud selectable fibre optic module 24 320 Vdc 20 48 230 Vac 20 47 63 Hz 5 10 W 10 60 C 25 80 C lt 95 IP 52 IP 54 2 5 kg Note 1 The additional relay R5 is controlled by self test program SEB Divisione Elettronica e Sistemi TECHNICAL CHARACTERISTICS Note 2 Breaking capability at 110 Vdc L R 40 ms 100 000 operat
41. mmands can be programmed as definite time inverse time T exponential time T 2018 continue the command will be issued until B gt 0 7 The definite time selection is preferable when step down transformers in cascade are equipped with tap changer When dependent time functions are used it is available a programmable minimum time delay To between the issue of two consecutive commands Operation disabling The voltage regulation operations can be disabled by e external command digital input e detection of anomaly condition such as under or over voltage U lt U gt overcurrent threshold tap changer signals inconsistency command inconsistency reverse power flowing in the controlled transformer The disabling causes are programmable except U lt and U gt always active SEB Divisione Elettronica e Sistemi GENERAL CHARACTERISTICS Tap changer signals inconsistency The voltage regulation function can be disabled when the CU9ON unit verifies more than one of the digital inputs programmed to detect the tap changer position are active signals ESTRPOS ESTRNEG INTER where ESTRPOS highest position positive ESTRNEG lowest position negative INTER intermediate position The check of the status and the disable condition of the voltage regulation function is performed only if the specific blocking function has been enabled in the programming section Command inconsis
42. n parameters set up fig 2 24 6 3 Regulation time delay programming fig 2 sese 25 64 Thresholds set up fig 2 42 4 4 2242 4222442 422144 242442242 24 4 4 24 26 6 5 Operation disabling on external causes fig 2 29 6 6 Output relays programming fig 2 5016500850855 505505505 30 6 7 Digital input function programming fig 2 32 6 8 Parameter values visualization fig 3 22222211111 1 33 0 9 Events ione enel DEL tas eats I e 35 6 10 Counters 3 5625 52 react ete SEE 37 7 VOLTAGE EQUALIZING MODE PARAMETERS SET UP 39 7 1 Nominal values set up fig 4 nnois 39 7 2 Voltage equalizing parameters set up fig 4 40 7 3 Equalizing time delay programming fig 4 40 7 4 Thresholds set up fig 4 eee ie lo ia 2 ia eee 41 7 5 Operation disabling on external causes 42 7 6 Output relays programming fig 4 42 77 Digital input function programming fig 4 44 7 8 Parameter values visualization fig 5 sees 45 1 9 Events renne d
43. nchronizing of generators 25A All the functions of the unit are fully programmable by the front panel keyboard or through the RS485 serial interface set up and measured parameters can be visualized on the front panel display and transmitted on the RS485 communication serial port OPERATING MODES the CU90N unit manages the following functional modes e voltage regulating unit for transformers equipped with tap changer e voltage equalizer for generator paralleling The two operating modes are independent and only one at the same time can be selected The User Manual is divided into two separate sections one for each mode as the programming data is different for each operating mode THRESHOLDS when the operating mode VOLTAGE REGULATING is active the following voltage and current thresholds are available undervoltage threshold U lt overvoltage threshold U gt e maximum compensation current la gt e overload threshold I e overcurrent threshold short circuit gt gt e current unbalance alarm threshold Id The gt gt and Id thresholds can be used to disable the regulating operations When the operating mode VOLTAGE EQUALIZING is active there are ONLY AVAILABLE an undervoltage threshold U and an overvoltage threshold U gt to disable the equalizing function The available settings for each threshold are listed in Table A OUTPUT RELAYS there are available 4 output relays R1 R2 R3 R4 the output
44. nd POWER ON no other information is presented for the other events the following displays give more detailed information on the event Q2 THRESHOLD IDENTIFICATION El eeee Not shown for STATUS event It is shown the threshold that caused the operation disabling E2 U lt E5 U gt 0 70 Un 1 25 Un Q3 PARAMETER SET UP It is shown the parameter INS insensitivity related to the equalizing function El INS 0 040 04 ACTIVATED OUTPUT RELAYS El RELAY nnnnnnn It shows the list of the output relay activated by the threshold trip El RELAY E3 RELAY 1 3 4 1 4 46 Examples SEB Divisione Elettronica e Sistemi VOLTAGE EQUALIZING MODE PARAMETERS SET UP When no output relays have been activated no relays programmed to TRIP on the threshold the following message will be displayed El RELAY NONE Q5 DIGITAL CHANNELS RELATED TO MEMORIZED EVENT El DIG ly 53 The list of the digital inputs related to the memorized event is displayed STATUS function command If no digital inputs were activated the message NONE is displayed Q6 Q7 MEASURED VOLTAGES ON EVENT El Va El 171 y yy Un y yy Un The values of the measured voltages at the event are displayed the values are expressed as Un 08 09 Q10 DIGITAL INPUTS STATUS ON EVENT El El E DIG1 vv DIG2 vv DIG3 vv The status of the digital inputs at the event are displayed The parame
45. ndition The same procedure will be used for R2 and R4 relays 13 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 3 4 and 5 the references A1 B1 B2 etc identify specific displayed messages in the figures The figure 1 main menu is applicable for all operation modes whilst the remaining figures are applicable as following Figure 2 and 3 VOLTAGE REGULATING MODE paragraph 6 Figure 4 and 5 VOLTAGE EQUALIZING MODE paragraph 7 51 Standard display A1 STANDARD DISPLAY It is the standard displayed message without operator s intervention no push buttons pressed for at least 5 minutes or when the RESET push button has been pressed The displayed information is function of the unit status NORMAL OPERATIONS During this state the following information can be visualized as defined by set up e Unit function ANSI code the display shows the ANSI codes of the enabled functions see ref C1 e Measured parameters the display shows one of the measures current voltage or voltage difference The measure is visualized as primary values when the selected measure is not managed by the operating mode incoherent selection no values will be presented TEMPORARY BLOCKED REGULATION or EQUALIZING OPERATIONS When the temporary block condition of the regulation or equalizing function occurs the
46. ons are in progress NONE no activation Example R1 ON F11 TEST OF OUTPUT RELAY R1 TEST R1 XXXXXXXX See paragraph 4 4 6 7 Digital input function programming fig 2 For each digital input one of the following functions are selectable e on off voltage regulating function e tap changer highest position tap changer lowest position e tap changer intermediate position e selection of alternative parameters set Vp2 and Z2 for voltage regulation e recording of measures on external event STATUS ref par 1 e pilot wire fault monitoring only digital input DIG2 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 function related to digital input DIG1 32 SEB Divisione Elettronica e Sistemi VOLTAGE REGULATING MODE PARAMETERS SET UP The following functions are selectable one of them NONE no functions active related to digital input DIG1 BLK EST disabling of the regulation operations external command SET2 ON use of parameters Vp2 and 22 for regulation ESTRPOS tap changer highest position ESTRNEG tap changer lowest position INTER tap changer intermediate position STATUS activation of status function see paragraph 1 G2 DIGITAL INPUT DIG2 SET
47. 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 SEB Divisione Elettronica e Sistemi GENERAL CHARACTERISTICS panel can visualize the unit set up but changes of parameters are disabled ENTER and buttons disabled 11 Voltage REGULATION mode ANSI 90 The description of the displayed information for the VOLTAGE REGULATION operation mode is shown in paragraph 6 figure 1 2 and 3 The CU90N voltage regulating unit is used to control the secondary voltage of a transformer equipped with on load tap changer insertion fig 6 and 7 CU90N unit delivers commands to the tap charger when the controlled voltage Va input transducer U3 differs from the programmed reference voltage value Vp more than a programmed quantity This voltage difference called degree of insensibility a must be programmed taking into consideration the value of the steps of the changer If the regulated value is the voltage at the end of a transmission line the CU90N unit can compensate the line voltage drop using the CURRENT COMPENSATION function In paragraph 9 is presented an example of parameter set up with current compensation function Regulation algorithm The condition which determines the issue of commands to the changer is the following 8 21 where Va Vp Z Ia Vp a Vp
48. pted 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 unit returns to the standard condition e reset of glowing LED s e drop off of tripped relays e reset of any parameter changed but not confirmed parameters are shown as confirmed at the end of the last programming session e display on STANDARD MODE Fig 1 ref A1 par 5 1 12 SEB Divisione Elettronica e Sistemi PROGRAMMING AND TEST 4 4 Test of output relays When the output relays test is selected Fig 2 ref F11 and Fig 4 ref F8 itis 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 R1 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 the 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 co
49. ref paragraph 1 1 alarm for threshold Id gt insertion 2TRAFO alarm for threshold gt gt insertion BIPOL external command STATUS POWER ON 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 The index 1 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 BLK U lt regulation operations disabled on threshold U lt BLK U gt regulation operations disabled on threshold U gt BLK gt gt regulation operations disabled on threshold gt gt BLK POS regulation operations disabled on tap changer position inconsistency BLK COM regulation operations disabled on command inconsistency BLK INV regulation operations disabled on reverse power detection gt gt alarm on threshold gt gt insertion BIPOL Id alarm on threshold Id insertion 2TRAFO STATUS information recorded on external command POWER ON switch on of the unit 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 35 SEB Divisione Elettronica e Sistemi VOLTAGE REGULATING MODE PARAMETERS SET UP Q2 THRESHOLD IDENTIFICATION Not shown for STATUS event Yn It is shown the thre
50. ristics Regulation algorithm The condition which determines the issue of commands to the changer is the following 21 where Va VI a VI VI measured voltage network side Un Va measured voltage generator side Un insensibility degree The issue of commands will continue as long as the module of B is higher than 0 7 an output relay can be activated to signal the regulating process in progress selection IB ref F7 paragraph 7 6 The type of the issued command is function of the B sign B gt 0 LOWER command issue DIM B 0 RAISE command issue AUM Command timing The duration TCOM of the AUM DIM commands is programmable definite time to match the characteristics of the voltage regulator of the generator The time delay between two commands can be programmed as SEB Divisione Elettronica e Sistemi GENERAL CHARACTERISTICS definite time inverse time T exponential time T 2078 continue the command will be issued until B gt 0 7 When dependent time functions are used it is available a programmable minimum time delay To between the issue of two consecutive commands Blocking functions The voltage equalizing function can be blocked by e external command digital input detection of under or over voltage condition U lt U gt on network side The blocking functions related to voltage thresholds are always active SEB Divisione Elettronica e Sistemi
51. s 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 set up If the new set up is not confirmed within 5 minutes from the last pressed push button the unit visualizes again the previous set up the parameters set up that the unit is still using 11 SEB Divisione Elettronica e Sistemi PROGRAMMING AND TEST 4 2 to 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 gt 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 acce
52. shold that caused the operation disabling if programmed ref paragraph 6 5 or the alarm signaling if programmed ref paragraph 6 6 This information is not presented on STATUS event 2 gt gt E5 U gt 8 Id gt 2 50 In 1 25 Un 0 60 In Q3 Q4 Q5 PARAMETER SET UP It is shown the parameters related to the regulation function voltage reference Vp insensitivity degree INS current compensation coefficient Z El Vp El INS El 2 0 98 Un 0 040 Vp 0 200 Vp Q6 ACTIVATED OUTPUT RELAYS El RELAY nnnnnnn It shows the list of the output relay 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 Q7 DIGITAL CHANNELS RELATED TO MEMORIZED EVENT Examples El DIG 1 3 4 The list of the digital inputs related to the memorized event is displayed STATUS function command If no digital inputs were activated the message NONE is displayed Q8 Q9 Q10 Q11 MEASURED CURRENTS AND VOLTAGES ON EVENT Q8 Q9 Q10 Q11 El Va El Ia El El Iw y yy Un y yy In y yy In 36 SEB Divisione Elettronica e Sistemi VOLTAGE REGULATING MODE PARAMETERS SET UP The values of the measured voltage currents and the angle between the current and the voltage at the event are displayed the values are expressed as Un In and degree There are presented only t
53. ss Time and date are programmable and they are used to mark recorded events B7 TIME DATE programmable 21 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 Operating mode selection and insertion fig 1 C1 OPERATING MODE SELECTION programmable FUNCTION XXXXXXXX The following operating mode are available Operating mode SELECTION ANSI Voltage regulating unit for tap changer control REGOL 009 Voltage equalizer unit for automatic synchronizing of EQUALIZ generators Examples C1 C1 FUNCTION FUNCTION REGOL EQUALIZ C2 INSERTION SELECTION programmable The selection is presented ONLY FOR VOLTAGE REGULATION operating mode INSERZ XXXXXXXX The available selections are the followings Voltage regulation with only one measured current UNIPOL Voltage regulation with TWO measured current BIPOL Voltage regulation with TWO PARALLEL OPERATING TRANSFORMERS 2TRAFO the threshold current unbalance Id will be available 22 SEB Divisione Elettronica e Sistemi VOLTAGE REGULATING MODE PARAMETERS SET UP 6 VOLTAGE REGULATING MODE PARAMETERS SET UP 6 1 Nominal values set up fig 2 D1 NOMINAL CURRENT SELECTION In programmable In jA In nominal phase current programmable 1 A or 5 A D2 NOM
54. t difference vector Id ccc n nn In ccc ON enabled threshold OFF disabled threshold available but not active n nn threshold value expressed as In programmable 0 10 9 99 In resolution 0 01 In To signal the unbalanced condition alarm an output relay can be activated by the threshold Example Id ON 0 20 In E7S UNBALANCED CONDITION TIME DELAY programmable TI Id XX XX S Set up of the time delay related to the unbalanced condition threshold Id to activate the output relay for alarm signaling xx xx time delay programmable 00 02 99 99 seconds Example TI Ide 20 00 s E8S REVERSE POWER ANGLE programmable tnnn 28 SEB Divisione Elettronica e Sistemi VOLTAGE REGULATING MODE PARAMETERS SET UP Set up of the angular sector which defines the condition of reverse power power flowing from the MV side of the transformer the angular sector is defined as INV 90 where programmable 180 180 resolution 1 The measured angle is between the current la transducer 11 and the voltage Va transducer U3 MINV 60 The issue of AUM DIM commands will be temporary disabled if programmed when the vector of the current la is within the angular sector 150 30 the measured voltage Va is used as a reference Example Note the angle are considered positive when the current vector lags referred to the voltage vector 6 5 Operation disabling on
55. tays until faults are pointed out by the monitoring module during this condition the unit functions are suspended to avoid unsuitable tripping STATUS FUNCTION when the STATUS function is activated by one of the digital input when programmed the unit memorizes information related to measured parameters and digital input status see par 6 9 and 7 9 EVENTS The recorded information allows an analysis of the installation parameters when an external event is detected e g trip of protection relays circuit breaker open 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 unit 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
56. tency The voltage regulation function can be disabled when the 9 unit verifies that one of the digital inputs programmed to detect the extreme tap changer position signals ESTRPOS and ESTRNEG is active in the following condition gt 1 B gt 0 command DIM issue active digital input ESTRPOS gt 1 lt 0 command AUM issue active digital input ESTRNEG The check of the status and the disable condition of the voltage regulation function is performed only if the specific blocking function has been enabled in the programming section Reverse power The voltage regulation function can be disabled when the CU90N unit verifies the reverse power flow in the controlled transformer power flowing from the MV side of the transformer the regulation function can be disabled if the measured angle between the current la transducer 11 and the voltage Va transducer U3 in the angular sector 90 where is programmable from 180 to 180 The disable condition of the voltage regulation function is performed only if the specific blocking function has been enabled in the programming section if the blocking function has not been programmed when the reverse power condition is detected the CU9ON unit will operate considering the parameter Z 0 Unbalanced load alarm It is available the 2TRAFO insertion mode see insertion fig 7 to allow the management of 2 parallel operating transformers with the same electrical
57. ter vv can assume the value HI or LO Q11 012 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 7 10 Counters fig 5 In this section are displayed the total and partial counters of the command issued to the voltage control unit of the generator and the numbers of programming sessions with the date and time of the last confirmed programming session 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 47 SEB Divisione Elettronica e Sistemi VOLTAGE EQUALIZING MODE PARAMETERS SET UP R1 R2 COUNTERS OF ISSUED COMMANDS R1 R2 CMNOR CMNOR P Display of the partial and total T counters of the issued commands to the voltage regulator of the generator When the value exceed 9999 the counter starts again from 0000 R3 R5 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 48 SEB Divisione Elettronica e Sistemi INSTALLATION 8 INSTALLATION 8 1 Supplied kit RK VERSION 19 rack installation
58. the CU90N unit when operating as VOLTAGE EQUALIZER ANSI 25 they are not used 49 SEB Divisione Elettronica e Sistemi INSTALLATION 82 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 Va terminals 1 3 voltages with Un programmed from 190 to 380 V terminals 2 3 voltages with Un programmed from 0 to 125 V VI terminals 16 18 voltages with Un programmed from 190 to 380 V terminals 17 18 voltages with Un programmed from 0 to 125 V Current circuits It is suggested to terminate the current wiring using eyelet terminals Minimum suggested wire cross section 2 5 mm With reference to the insertion diagram in the next page the currents measured by the protection relay have the following matching current la terminals A1 A2 current 12 terminals B1 B2 50 SEB Divisione Elettronica e Sistemi INSTALLATION 11 0 380 12 0 125V Va C5 2 4 16 0 380V 17 0 125 RI 2 U4 v Fr CUOI R3 8 42 58 42 R4 I I Uaux R5 2 9 m TEST c Ge LINE H I LINE L gt gt gt 8 AL 3 I I VOLTAGE REGULATOR ANSI 90 Fig 6 51 SEB Divisione Elettronica e Sistemi INSTALLATION
59. tus 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 1 N2 DIGITAL INPUT STATUS The actual status of each digital input is displayed 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 P5 P6 MEASUREMENTS DISPLAY The actual values of the measured and computed parameters are displayed the parameters related to disabled measurements are not displayed as function of the insertion programmed at ref C2 paragraph 5 4 P1 P2 yyyyyy V yyyyyy V Measured voltage Ua and computed voltage difference DV where DV Va Vp Z Ia Vp ref paragraph 1 1 B Parameter B ref paragraph 1 1 34 SEB Divisione Elettronica e Sistemi VOLTAGE REGULATING MODE PARAMETERS SET UP P4 P5 yyyyy A P4 Measured current la transducer 11 P5 Measured current 12 transducer 12 insertion BIPOL or computed current Id module of the vectorial difference between the currents la and I2 only 2TRAFO insertion ref C2 paragraph 5 4 6 9 Events fig 3 On the display are shown the memorized information related to the following events operations disabled due to external anomaly
60. w seb barlassina it mail to servizio clienti seb barlassina it
61. xxx is selectable as the following ON R1 output relay activation on the threshold NONE no activation Examples R1 U R1 U R1 Id ON ON NO AZION NOTE the selection F7 is presented only if the insertion 2TRAFO has been selected at reference C2 par 5 4 F8 OUTPUT RELAY ACTIVATION ON REVERSE POWER programmable R1 INV XXXXXXX Programming of the R1 output relay activation NONE ON on the detection of the reverse power condition ref paragraph 1 1 The parameter xxxxxxxx is selectable as the following ON R1 output relay activation on the reverse power condition NONE no activation F9 OUTPUT RELAY ACTIVATION WHEN REGULATION OPERATIONS ARE DISABLED programmable R1 BLK XXXXXXX Programming of the R1 output relay activation NONE ON when the regulation operations are disabled for any of the programmed causes ref E1B E4B paragraph 6 5 The parameter xxxxxxxx is selectable as the following ON R1 output relay activation when operations are disabled NONE no activation 31 SEB Divisione Elettronica e Sistemi VOLTAGE REGULATING MODE PARAMETERS SET UP F10 OUTPUT RELAY ACTIVATION WHEN REGULATION OPERATIONS ARE IN PROGRESS programmable R1 B XXXXXXX Programming of the R1 output relay activation NONE ON when the regulation operations are in progress condition B gt 1 ref paragraph 1 1 The parameter xxxxxxxx is selectable as the following ON R1 output relay activation when operati

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