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ORION ITALIA Instruction Manual
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ORION ITALIA Instruction Manual

Electrical variable analyzer relay
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O R I O N I T A L I A
I N S T R U C T I O N M A N U A L
E V A R
Electrical variable analyzer relay
Software rev.: EVAR S 1.19
Manual P/N: EVAR GBM 31/05/2006
Via G. Orsi 35, 29100 Piacenza [PC] – Italia
Phone: ++ 39 0523 591161, Fax: ++ 39 0523 593898, Internet:
www.orionitalia.com

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  • Page 1 O R I O N I T A L I A I N S T R U C T I O N M A N U A L E V A R Electrical variable analyzer relay Software rev.: EVAR S 1.19 Manual P/N: EVAR GBM 31/05/2006 Via G.
  • Page 3 For any requests, please contact: ORION ITALIA ASSISTANCE SERVICE PHONE.: ++39 0523 591161 FAX: ++39 0523 593898 INTERNET: www.orionitalia.com SYMBOLS IN THE TEXT AND THEIR MEANINGS It indicates an OBLIGATION, an operation that must be obligatory followed.
  • Page 5 I N D E X 1. GENERAL INFORMATION ....................Description ................................ Applications ............................... Protection and functionality ......................... Digital measurement ............................Signalling and programming ........................Communication ..............................Specifications ..............................Meaning of the order code .......................... 2. INSTALLING ..........................Identification ..............................Unpacking ................................
  • Page 6 4.11 Setpoint page 11: POWER FACTOR 4.13 ....................4.12 Setpoint page 12: DEMAND PROTECT. 4.16 ..................... 4.13 Setpoint page 13: THD PROTECTION 4.18 ....................4.14 Setpoint page 14: PULSE COUNTER 4.18 ....................4.15 Setpoint page 15: EVENT RECORDER 4.19 ....................4.16 Setpoint page 16: COMMUNICATIONS 4.20 ....................
  • Page 7 Chapter 1: General Information 1. General information DESCRIPTION The EVAR relay has been designed for the electrical parameters continuous monitoring in the medium or low- voltage 1-phase or 3-phase systems. It allows a direct or remote monitoring of the system general conditions as it immediately signals any fault.
  • Page 8 Chapter 1: General information SIGNALLING AND PROGRAMMING • LCD & LED display indication. • Indication and storage of fault conditions and their values. • Indication on the system status: - NORMAL - POWER FAULT - CURRENT FAULT - POWER FACTOR FAULT - VOLTAGE FAULT - DEMAND FAULT - UNBALANCE FAULT...
  • Page 9 Chapter 1: General Information DIMENSION FRONT PANEL CUTOUT 144 x 144 x 141 mm 137 x 137 mm WEIGHT APPLICABILITY 1.5 Kg System: one and three and four-wire; Frequency: 50 and 60 Hz; Current: max. 5000 A; Voltage: max. 69 KV PHASE AND GROUND CT INPUTS VOLTAGE INPUT Source CT (In):...
  • Page 10 Chapter 1: General information DEMAND MONITORING MEASURED PARAMETERS (Accuracies based on less than (Accuracies based on 100% 6xIn and 125% Un inputs) In and 100% Un inputs) Current: Phase A, B, C Currents Measured values: Phase A, B, C Current Accuracy: ±...
  • Page 11 Test certificate (if required) Inspect the unit and inform ORION ITALIA of any damage. If reshipment is required the original container and packing should be used. MOUNTING The mounting should be carried out as follows: 1.
  • Page 12 Chapter 2: Installing WIRING – OUTPUT RELAY AND SWITCH INPUTS “SW” Before carrying out the installation of the unit, it is necessary to read and understand the indications provided by the Constructor. All the installation operations must be carried out by qualified personnel with adequate knowledge of the functioning of the unit and of the content of this manual.
  • Page 13 Chapter 2: Installing MODALITA DI COLLEGAMENTO CON TOROIDI CURRENT TRANSFORMER CONNECTIONS TYPES COLLEGAMENTO CON COLLEGAMENTO RESIDUO COLLEGAMENTO TOROIDE DUE TOROIDI DI TERRA DI TERRA SEPARATO 2 CTs CONNECTION RESIDUAL GROUND CONNECTION ZERO SEQUENCE GROUND CONNECTION LINEA LINE 1A o 5A SECONDARIO TC 1A or 5A SECONDARY CTS 29 30 29 30...
  • Page 14 Chapter 2: Installing CURRENT TRANSFORMERS (CT) Current transformers should supply the required current to the total secondary load including also the burdens of: • the CT inputs (= 0.1 VA) • the connection wiring. The current transformers (1, 2, 3 or 4) supply the relay with current proportional to the current in each of the phases of the system being protected.
  • Page 15 MAXIMUM DISTANCE OF 1000 METERS. For larger systems, additional RS-485 channels must be added. For increasing the number of relays on a single channel to more than 32, consult ORION ITALIA. Figure 2.4 – Communications ELECTRICAL VARIABLE ANALYZER RELAY – EVAR Software rev.: EVAR S 1.19...
  • Page 16 Chapter 2: Installing CONTROL POWER • Voltage ranges for the relay EVAR 20 Vdc 341 Vdc ....................20 Vac 260 Vac • Power supply connection terminals 32 and 34........................No internal or external adjustments are required to use any of the above supply voltages. For the external protection, the relay EVAR has no internal fuses.
  • Page 17 Chapter 3: Using of the menu 3. Using of the menu MENU STRUCTURE EVAR menu is a tree-structure type, consisting of: • PAGE function access; • LINE setpoints for selecting, entering and reading data. MENU ACCESS You can have access to the menu, by pressing one of the following keys: ⇒...
  • Page 18 Chapter 3: Using of the menu QUICK SURFING GUIDE The operation mode of the PAGE, LINE, VALUE and STORE keys is described in details only in the description of the first PAGE of the SETPOINT Menu. As the mode is the same even for surfing in the other pages, the use of these keys, starting from the second PAGE of the Menu, will not be repeated.
  • Page 19 Chapter 3: Using of the menu MENU STRUCTURE In the following page you can find the representation of the complete structure consisting of the EVAR Menu Pages. The two menus represented can be activated by using the following keys: POINTS ⇒...
  • Page 20 Chapter 3: Using of the menu SETPOINT PAGE 1 POINTS SETPOINT ACCESS ▼ PAGE ▲ SETPOINT PAGE 2 SYSTEM SETUP ▼ PAGE ▲ ACTUAL SETPOINT PAGE 3 ACTUAL VALUES 1 VALUES DATE & TIME CURRENT ▼ PAGE ▲ ▼ PAGE ▲...
  • Page 21 Chapter 3: Using of the menu HOW TO USE SETPOINTS AND ACTUAL VALUES KEYS POINTS SETPOINT PAGE 1 SETPOINT ACCESS LINE ENTER ACCESS CODE: X X X SETPOINT ACCESS ENABLED LINE ENTER NEW ACCESS Select: NO or YES ▲VALUE or▼VALUE CODE: ENTER NEW ACCESS STORE...
  • Page 23 Enter the primary current rating of the phase current transformers being used. This value is found on the transformer nameplate. In case your transformer has a rating outside this range, please contact ORION ITALIA. All three current transformers must have the same rating.
  • Page 24 Chapter 4: Menu "SETPOINTS" GROUND CT RATING 5 A ÷ 5000 A RANGE: ...................... PRIMARY 100 A STEPS: ........................Enter the primary current rating of the ground current transformers being used VT CONNECTION RANGE: NONE, WYE, DELTA-DELTA, OPEN DELTA, Van, Vab, ......
  • Page 25 Chapter 4: Menu "SETPOINTS" Setpoint page 4: OUTPUT RELAYS SETPOINT PAGE 4 You can set the features of output contacts to suit specific applications. OUTPUT RELAYS ALARM NON-OP. RANGE: DE-ENERG. ENERG..................STATE: DE-ENERG. You can select the Non-Oper. state of the alarm relay contacts. The wiring diagram in Chapter 2 shows the relay contacts without control power.
  • Page 26 Chapter 4: Menu "SETPOINTS" Setpoint page 5: SWITCH INPUTS SETPOINT PAGE 5 You can set switch inputs features to suit specific applications. SWITCH INPUTS ALARM When the alarm contact is assigned to one of the switch inputs, a change in the switch status will produce an alarm condition and the alarm contact will activate.
  • Page 27 Chapter 4: Menu "SETPOINTS" SWITCH 3 TRANS.: RANGE: OPEN TO CLOSED; CLOSED TO OPEN ............OPEN TO CLOSED It determines the operating sequence of the SW3 input. ⇒ OPEN TO CLOSED enabling the switch input SW3 transition in open to closed mode. CLOSED TO OPEN ⇒...
  • Page 28 Chapter 4: Menu "SETPOINTS" Ph. OVERCURRENT RANGE: NONE; ALARM; AUX. 1; AUX. 2 ............... RELAY: NONE Phase overcurrent condition can be associated with the activation of the ALARM; AUX 1; AUX 2 contact or disabled. NONE: disabling; • If NONE is selected, by pressing the LINE key, Gnd. OVERCURRENT RELAY will be displayed.
  • Page 29 Chapter 4: Menu "SETPOINTS" Ph. O/C CURVE 0.5 ÷ 1.1 RANGE: ......................... SHIFT STEPS: ..........................0. It allows to enter the curve shift multipler (see appendix A). By pressing the LINE key, END OF PAGE CURRENT PROTECT. will be displayed. Gnd. OVERCURRENT 0.5 ÷...
  • Page 30 Chapter 4: Menu "SETPOINTS" OVERVOLTAGE RANGE: NONE; ALARM; AUX. 1; AUX. 2 ............... RELAY: NONE Overvoltage condition can be associated with the activation of the ALARM; AUX 1; AUX 2 contact or disabled. NONE: disabling; • If NONE is selected, by pressing the LINE Key, PHASE REVERSAL RELAY will be displayed.
  • Page 31 Chapter 4: Menu "SETPOINTS" Setpoint page 8: UNBALANCE PROT. SETPOINT PAGE 8 You can enter the setpoints which determine the current and voltage unbalance protections. UNBALANCE PROT. • If 1 CURRENT TRANSF. has been selected in PHASE CTs WIRING, by pressing the LINE Key, VOLT UNBALANCE DELAY will be displayed.
  • Page 32 Chapter 4: Menu "SETPOINTS" Setpoint page 9: FREQUENCY PROT. SETPOINT PAGE 9 You can enter the setpoints which determine the frequency protections. • FREQUENCY PROT. → If NONE has been selected in VT CONNECTION [ SETPOINT PAGE 2], by pressing the LINE Key, END OF PAGE FREQUENCY PROT.
  • Page 33 Chapter 4: Menu "SETPOINTS" 4.10 Setpoint page 10: POWER PROTECT. SETPOINT PAGE 10 You can enter the setpoints which determine the positive and negative power protections. POWER PROTECT. • If NONE has been selected in VT CONNECTION [→ SETPOINT PAGE 2], by pressing the LINE Key, END OF PAGE POWER PROT.
  • Page 34 Chapter 4: Menu "SETPOINTS" POSITIVE KW RANGE: NONE; ALARM; AUX. 1; AUX. 2 ............... RELAY: NONE Positive real power condition can be associated with the activation of the ALARM; AUX 1; AUX 2 contact or disabled. NONE:....disabling; • If NONE is selected, by pressing the LINE Key, NEGATIVE KW will be displayed. 10 ÷...
  • Page 35 Chapter 4: Menu "SETPOINTS" NEGATIVE KVAR RANGE: NONE; ALARM; AUX. 1; AUX................ RELAY: NONE Negative reactive power condition can be associated with the activation of the ALARM; AUX 1; AUX 2 contact or disabled. NONE: disabling; • If NONE is selected, by pressing the LINE Key, END OF PAGE POWER PROTECTION will be displayed.
  • Page 36 Chapter 4: Menu "SETPOINTS" POWER FACTOR 2 DELAY Leading POWER FACTOR 1 DELAY Power factor 1 1,00 dropout Power factor 2 dropout 0,95 0,90 Power factor 1 pickup Power factor 2 0,85 pickup POWER FACTOR 1 Lagging DELAY POWER FACTOR 2 DELAY P.F.
  • Page 37 Chapter 4: Menu "SETPOINTS" P.F. LAGGING 1 0.01 ÷ 1.00 RANGE: ......................DROPOUT: 0.02 STEPS: 0.01 ......................... It allows to enter the power factor lagging – level 1 dropout level in relation to the intervention value. 0.5 s ÷ 600.0 s P.F.
  • Page 38 Chapter 4: Menu "SETPOINTS" 4.12 Setpoint page 12: DEMAND PROTECT. SETPOINT PAGE 12 You can enter the setpoint which set up the demand metering functions of: 1. current demand phase and ground DEMAND PROTECT. 2. three-phase demand for real, reactive and apparent power. Demand time period Once DEMAND PERIOD, or PHASE CT RATING PRIMARY [ SETPOINT PAGE 2], or VT PRIMARY and SECONDARY, etc.,...
  • Page 39 Chapter 4: Menu "SETPOINTS" Gnd AMPS DEMAND RANGE: NONE; ALARM; AUX. 1; AUX. 2 ..............RELAY: NONE Ground current demand condition can be associated with the activation of the ALARM; AUX 1; AUX 2 contact or disabled. NONE: disabling; • If NONE is selected, by pressing the LINE Key, POWER DEMAND T.
  • Page 40 Chapter 4: Menu "SETPOINTS" 4.13 Setpoint page 13: THD PROTECTION SETPOINT PAGE 13 You can enter the setpoints which determine the current and voltage THD protections. THD PROTECTION. CURRENT THD RANGE: NONE; ALARM; AUX. 1; AUX. 2 ............... RELAY: NONE Current THD condition can be associated with the activation of the ALARM;...
  • Page 41 Chapter 4: Menu "SETPOINTS" PULSE COUNTER 0.5 s ÷ 600.0 s RANGE: ..................... DELAY: 30.0 SEC STEPS: 0.5 s ........................You can use this setpoint to set a time delay between when a programmed number of pulses has occurred and when an output relay is energized. END OF PAGE Last LINE of PAGE 14.
  • Page 42 Chapter 4: Menu "SETPOINTS" 4.16 Setpoint page 16: COMMUNICATIONS SETPOINT PAGE 16 This page contains setpoints controlling the EVAR communications with other devices. COMMUNICATIONS MODBUS ADDRESS Enter the logic address. COM1 RS-232 RANGE: 1200; 2400; 4800; 9600; 19200; 38400; 57600 ........
  • Page 43 Chapter 5: Menu "ACTUAL VALUES" 5. Menu "ACTUAL VALUES" Actual values 1: CURRENT ACTUAL VALUES 1 This page gives information on the system phase and ground currents being monitored by the EVAR relay. CURRENT A: 0.00 B: 0.00 It displays the RMS value of phase A, B and C phase currents. This message will only be displayed if 2 or 3 CTs has been selected in PHASE CTs C: 0.00 WIRING [...
  • Page 44 Chapter 5: Menu "ACTUAL VALUES" Actual values 3: POWER ACTUAL VALUES 3 It displays the values of: - total RMS three phase real power as well as the individual phase real power (only for POWER WYE system); - total RMS three phase reactive power as well as the individual phase reactive power (only for WYE system);...
  • Page 45 Chapter 5: Menu "ACTUAL VALUES" Phase C P.F LAGGING 0.00 ÷ LEADING 0.00; V=0 AND/OR I=0 RANGE: ........V=0 AND/OR I=0 It displays the individual phase C power factor. ACTUAL VALUES 3 Last LINE of PAGE 3. Press LINE key or ▲PAGE key, the first Line of PAGE 4 will be displayed. END OF PAGE Actual values 4: ENERGY ACTUAL VALUES 4...
  • Page 46 Chapter 5: Menu "ACTUAL VALUES" Actual values 5: DEMAND ACTUAL VALUE 5 You can read the demand of currents and powers. DEMAND PHASE A CURRENT It displays the phase A current demand. DEMAND 0.00 A PHASE B CURRENT It displays the phase B current demand. DEMAND 0.00 A PHASE C CURRENT...
  • Page 47 Chapter 5: Menu "ACTUAL VALUES" Actual values 6: EVAR STATUS ACTUAL VALUES 6 It displays the relay status. EVAR STATUS It displays the alarms status. ALARMS INACTIVE ACTUAL VALUES 6 Last LINE of PAGE 6. Press LINE key or ▲PAGE key: the first Line of PAGE 7 will be displayed. END OF PAGE Actual values 7: EVENTS It displays the events [ →...
  • Page 48 Chapter 5: Menu "ACTUAL VALUES" Actual values 8: POWER ANALYSIS ACTUAL VALUES 8 You can find information on the harmonics. POWER ANALYSIS A: 0.0 B: 0.0 It displays the calculated THD for each current input RMS C: 0.0 % THD AMP GROUND CURRENT It displays the calculated THD for ground current.
  • Page 49 Chapter 5: Menu "ACTUAL VALUES" 5.10 Actual values 10: PULSE COUNTER ACTUAL VALUES 10 It displays the information on the pulse counter monitored by the relay. PULSE COUNTER PULSE COUNTER It displays the total number of pulses starting from the latest data clearing. PULSE COUNTER You can clear the data stored in the pulse counter.
  • Page 51 Chapter 6: Event recorder 6. Event recorder GENERAL INFORMATION EVAR is provided with an Event Recorder which stores the data concerning: • Alarm conditions • Control conditions occurred while EVAR is operating. All events, up to 20 max., will be stored in a memory buffer operating in FIFO (First-In, First-Out) mode.
  • Page 53 Chapter 7: Troubleshooting 7. Troubleshooting • EVAR CANNOT TURN ON ⇒ Check the control power fuses. • VOLTAGES ARE NOT DISPLAYED ⇒ Check the control power fuses. • CURRENTS ARE NOT DISPLAYED ⇒ Check the CTs wiring. Check the terminal for short-circuiting. •...
  • Page 55 ORION ITALIA reserves the right to modify the relay and/or replace what is described in this manual without any previous notice.
  • Page 57 Chapter 9: Appendix A Appendix A This Appendix lists the 3 possible curve types, and their corresponding curve shapes. They are listed as follows: ANSI CURVES Moderately Inverse Normal Inverse Very Inverse Extremely Inverse IAC CURVES IAC Short Time IAC Inverse IAC Very Inverse IAC Extremely Inverse IEC/BS142 CURVES...
  • Page 58 Chapter 9: Appendix A ANSI CURVES MODERATELY INVERSE TIMED O/C TRIP TIMES MODERATELY INVERSE ---------------------------------- Formula T= S * M * ( A + B / ( I / Ipu - C ) + D / ( I / Ipu - C ) ^2 + E / ( I / Ipu - C ) ^3 ) TRIP TIME (SEC) CURVE SHAPE CONSTANT A= 0.1735 CURVE SHIFT MULTIPLIER...
  • Page 59 Chapter 9: Appendix A MODERATELY INVERSE 1000 TIME O/C DIAL 0.01 0.01 MULTIPLE OF PICKUP CURRENT (PER UNIT) ELECTRICAL VARIABLE ANALYZER RELAY – EVAR Software rev.: EVAR S 1.19 Manual P/N: EVAR GBM 31/05/2006...
  • Page 60 Chapter 9: Appendix A ANSI CURVES NORMAL INVERSE TIMED O/C TRIP TIMES NORMAL INVERSE ---------------------------------- Formula T= S * M * ( A + B / ( I / Ipu - C ) + D / ( I / Ipu - C ) ^2 + E / ( I / Ipu - C ) ^3 ) TRIP TIME (SEC) CURVE SHAPE CONSTANT A= 0.0274 CURVE SHIFT MULTIPLIER...
  • Page 61 Chapter 9: Appendix A NORMAL INVERSE 1000 TIME O/C DIAL 0.01 0.01 MULTIPLE OF PICKUP CURRENT (PER UNIT) ELECTRICAL VARIABLE ANALYZER RELAY – EVAR Software rev.: EVAR S 1.19 Manual P/N: EVAR GBM 31/05/2006...
  • Page 62 Chapter 9: Appendix A ANSI CURVES VERY INVERSE TIMED O/C TRIP TIMES VERY INVERSE ---------------------- Formula T= S * M * ( A + B / ( I / Ipu - C ) + D / ( I / Ipu - C ) ^2 + E / ( I / Ipu - C ) ^3 ) TRIP TIME (SEC) CURVE SHAPE CONSTANT A= 0.0615 CURVE SHIFT MULTIPLIER...
  • Page 63 Chapter 9: Appendix A VERY INVERSE 1000 TIME O/C DIAL 0.01 0.01 MULTIPLE OF PICKUP CURRENT (PER UNIT) ELECTRICAL VARIABLE ANALYZER RELAY – EVAR Software rev.: EVAR S 1.19 Manual P/N: EVAR GBM 31/05/2006...
  • Page 64 Chapter 9: Appendix A ANSI CURVES EXTREMELY INVERSE TIMED O/C TRIP TIMES EXTREMELY INVERSE -------------------------------- Formula T= S * M * ( A + B / ( I / Ipu - C ) + D / ( I / Ipu - C ) ^2 + E / ( I / Ipu - C ) ^3 ) TRIP TIME (SEC) CURVE SHAPE CONSTANT A= 0.0399 CURVE SHIFT MULTIPLIER...
  • Page 65 Chapter 9: Appendix A EXTREMELY INVERSE 1000 TIME O/C DIAL 0.01 0.01 MULTIPLE OF PICKUP CURRENT (PER UNIT) ELECTRICAL VARIABLE ANALYZER RELAY – EVAR Software rev.: EVAR S 1.19 Manual P/N: EVAR GBM 31/05/2006...
  • Page 66 Chapter 9: Appendix A IAC CURVES IAC SHORT INVERSE TIMED O/C TRIP TIMES IAC SHORT INVERSE ------------------------------- Formula T= S * M * ( A + B / ( I / Ipu - C ) + D / ( I / Ipu - C ) ^2 + E / ( I / Ipu - C ) ^3 ) TRIP TIME (SEC) CURVE SHAPE CONSTANT A= 0.043 CURVE SHIFT MULTIPLIER...
  • Page 67 Chapter 9: Appendix A IAC SHORT INVERSE TIME O/C DIAL 0.01 MULTIPLE OF PICKUP CURRENT (PER UNIT) ELECTRICAL VARIABLE ANALYZER RELAY – EVAR 9.11 Software rev.: EVAR S 1.19 Manual P/N: EVAR GBM 31/05/2006...
  • Page 68 Chapter 9: Appendix A IAC CURVES IAC INVERSE TIMED O/C TRIP TIMES IAC INVERSE ---------------------------------- Formula T= S * M * ( A + B / ( I / Ipu - C ) + D / ( I / Ipu - C ) ^2 + E / ( I / Ipu - C ) ^3 ) TRIP TIME (SEC) CURVE SHAPE CONSTANT A= 0.2078 CURVE SHIFT MULTIPLIER...
  • Page 69 Chapter 9: Appendix A IAC INVERSE 1000 TIME O/C DIAL MULTIPLE OF PICKUP CURRENT (PER UNIT) ELECTRICAL VARIABLE ANALYZER RELAY – EVAR 9.13 Software rev.: EVAR S 1.19 Manual P/N: EVAR GBM 31/05/2006...
  • Page 70 Chapter 9: Appendix A IAC CURVES IAC VERY INVERSE TIMED O/C TRIP TIMES IAC VERY INVERSE ---------------------------- Formula T= S * M * ( A + B / ( I / Ipu - C ) + D / ( I / Ipu - C ) ^2 + E / ( I / Ipu - C ) ^3 ) TRIP TIME (SEC) CURVE SHAPE CONSTANT A= 0.090 CURVE SHIFT MULTIPLIER...
  • Page 71 Chapter 9: Appendix A IAC VERY INVERSE 1000 TIME O/C DIAL MULTIPLE OF PICKUP CURRENT (PER UNIT) ELECTRICAL VARIABLE ANALYZER RELAY – EVAR 9.15 Software rev.: EVAR S 1.19 Manual P/N: EVAR GBM 31/05/2006...
  • Page 72 Chapter 9: Appendix A IAC CURVES IAC EXTREMELY INVERSE TIMED O/C TRIP TIMES IAC EXTREMELY INVERSE ------------------------------------- Formula T= S * M * ( A + B / ( I / Ipu - C ) + D / ( I / Ipu - C ) ^2 + E / ( I / Ipu - C ) ^3 ) TRIP TIME (SEC) CURVE SHAPE CONSTANT A= 0.004 CURVE SHIFT MULTIPLIER...
  • Page 73 Chapter 9: Appendix A IAC EXTREMELY INVERSE 1000 TIME O/C DIAL 0.01 MULTIPLE OF PICKUP CURRENT (PER UNIT) ELECTRICAL VARIABLE ANALYZER RELAY – EVAR 9.17 Software rev.: EVAR S 1.19 Manual P/N: EVAR GBM 31/05/2006...
  • Page 74 Chapter 9: Appendix A IEC/BS142 CURVES IEC SHORT TIME O/C TRIP TIMES IEC SHORT TIME ----------------------- Formula T= S * M * ( K / ( ( I / Ipu ) * * E - 1 ) ) TRIP TIME (SEC) CURVE SHAPE CONSTANT K= 0.050 CURVE SHIFT MULTIPLIER CURVE SHAPE CONSTANT E= 0.040...
  • Page 75 Chapter 9: Appendix A IEC SHORT TIME TIME O/C DIAL 0.01 MULTIPLE OF PICKUP CURRENT (PER UNIT) ELECTRICAL VARIABLE ANALYZER RELAY – EVAR 9.19 Software rev.: EVAR S 1.19 Manual P/N: EVAR GBM 31/05/2006...
  • Page 76 Chapter 9: Appendix A IEC/BS142 CURVES IEC -A (NORMAL INVERSE) O/C TRIP TIMES IEC-A (NORMAL INVERSE) ------------------------------------ Formula T= S * M * ( K / ( ( I / Ipu ) * * E - 1 ) ) TRIP TIME (SEC) CURVE SHAPE CONSTANT K= 0.140 CURVE SHIFT MULTIPLIER CURVE SHAPE CONSTANT E= 0.020...
  • Page 77 Chapter 9: Appendix A IEC-A (NORMAL INVERSE) 1000 TIME O/C DIAL MULTIPLE OF PICKUP CURRENT (PER UNIT) ELECTRICAL VARIABLE ANALYZER RELAY – EVAR 9.21 Software rev.: EVAR S 1.19 Manual P/N: EVAR GBM 31/05/2006...
  • Page 78 Chapter 9: Appendix A IEC/BS142 CURVES IEC -B (VERY INVERSE) O/C TRIP TIMES IEC-B (VERY INVERSE) ------------------------------------ Formula T= S * M * ( K / ( ( I / Ipu ) * * E - 1 ) ) TRIP TIME (SEC) CURVE SHAPE CONSTANT K= 13.500 CURVE SHIFT MULTIPLIER CURVE SHAPE CONSTANT E= 1.000...
  • Page 79 Chapter 9: Appendix A IEC-B (VERY INVERSE) 1000 TIME O/C DIAL 0.01 MULTIPLE OF PICKUP CURRENT (PER UNIT) ELECTRICAL VARIABLE ANALYZER RELAY – EVAR 9.23 Software rev.: EVAR S 1.19 Manual P/N: EVAR GBM 31/05/2006...
  • Page 80 Chapter 9: Appendix A IEC/BS142 CURVES IEC -C (EXTREMELY INVERSE) O/C TRIP TIMES IEC-C (EXTREMELY INVERSE) ------------------------------------ Formula T= S * M * ( K / ( ( I / Ipu ) * * E - 1 ) ) TRIP TIME (SEC) CURVE SHAPE CONSTANT K= 80.000 CURVE SHIFT MULTIPLIER CURVE SHAPE CONSTANT E= 2.000...
  • Page 81 Chapter 9: Appendix A IEC-C (EXTREMELY INVERSE 1000 TIME O/C DIAL 0.01 MULTIPLE OF PICKUP CURRENT (PER UNIT) ELECTRICAL VARIABLE ANALYZER RELAY – EVAR 9.25 Software rev.: EVAR S 1.19 Manual P/N: EVAR GBM 31/05/2006...
  • Page 83 Chapter 10: Appendix B 10. Appendix B STATION NAME =______________________ ISSUE DATE =______________ EQUIPMENT =______________________ APPLIED DATE =______________ DESIGNATION VOLTAGE =______________________ EVAR S/N =______________ DEVICE NUMBER =______________________ PHASE CT RATIO =______________________ GROUND CT RATIO =______________________ RELAY SETTINGS SETPOINTS ACCESS SETTINGS =_____________________________ ACCESS CODE (111 to 999) SYSTEM SETUP SETTINGS...
  • Page 84 Chapter 10: Appendix B Ph. UNDERCURRENT DROPOUT (1 to 100%) =_____________________________ Ph. UNDERCURRENT DELAY (0.5 to 600.0 SEC) =_____________________________ DETECT UNDERCUR. BELOW 2%CT? (NO or YES) =_____________________________ Ph. OVERCURRENT RELAY (NONE or ALARM or AUX.1 or AUX. =_____________________________ Ph. OVERCURRENT LEVEL (2 to 500% CT) =_____________________________ Ph.
  • Page 85 Chapter 10: Appendix B FREQUENCY PROT. SETTINGS UNDERFREQUENCY RELAY (NONE or ALARM or AUX.1 or =_____________________________ AUX. 2) UNDERFREQUENCY LEVEL (40.00 to 70.00 Hz) =_____________________________ UNDERFREQUENCY DROPOUT (0.01 to 5.00 Hz) =_____________________________ UNDERFREQUENCY DELAY (0.5 to 600 SEC) =_____________________________ Y RELAY (NONE or ALARM or AUX.1 or AUX. =_____________________________ =_____________________________ OVERFREQUENCY LEVEL (40.00 to 70.00 Hz)
  • Page 86 Chapter 10: Appendix B Ph-B AMPS DEMAND LEVEL (2 to 500%CT) =_____________________________ Ph-C AMPS DEMAND RELAY (NONE or ALARM or AUX. 1 or =_____________________________ AUX. 2) Ph-C AMPS DEMAND LEVEL (2 to 500%CT) =_____________________________ Gnd AMPS DEMAND RELAY (NONE or ALARM or AUX. 1 or =_____________________________ AUX.

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