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Thytronic NC020 Manual

Filter & capacitor bank protection relay
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NC020
FILTER & CAPACITOR BANK
PROTECTION RELAY
MANUAL
NC020 - Manual - 05 - 2022

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Summary of Contents for Thytronic NC020

  • Page 1 NC020 FILTER & CAPACITOR BANK PROTECTION RELAY MANUAL NC020 - Manual - 05 - 2022...

  • Page 2: Table Of Contents

    — 4 FUNCTION CHARACTERISTICS 4.1 HARDWARE DESCRIPTION .................................... 20 Power supply board ..................................... 20 CPU board ........................................21 Input board ........................................21 MMI (keyboard, LED and display) ................................21 4.2 SOFTWARE DESCRIPTION ....................................22 Kernel ..........................................22 Drivers ..........................................22 Application........................................22 NC020 - Manual - 05 - 2022...
  • Page 3 Phase overcurrent 50/51 - Standard inverse time curve (IEC 60255-3/BS142 type A) ..............72 Phase overcurrent 50/51 - Very inverse time curve (IEC 60255-3/BS142 type B) ................73 Phase overcurrent 50/51 - Extremely inverse time curve (IEC 60255-3/BS142 type C) ..............74 NC020 - Manual - 05 - 2022...
  • Page 4 8.4 APPENDIX B1 - I/O Diagram ...................................82 8.5 APPENDIX B2 - Interfaces ..................................... 83 8.6 APPENDIX B3 - Connection diagrams ................................84 8.7 APPENDIX C - Dimensions ....................................85 8.8 APPENDIX D - EC Declaration of conformity ...............................86 NC020 - Manual - 05 - 2022...

  • Page 5: Introduction

    I N T R O D U C T I O N — Scope and liability This document describes the functions, the technical data of NC020 devices; instructions for mount- ing, setting and commissioning are included. This manual has been checked out, however, deviations from the description cannot be completely ruled out, so that no liability in a legal sense for correctness and completeness of the information or from any damage that might result from its use is formally disclaimed.

  • Page 6: Product Identification

    • Test label with following informations: data, serial number and test operator signature. — Environment The NC020 device must be employed according to the environment conditions shown (see technical data). In case of different environment conditions, appropriate provisions must be provided (conditioning system, humidity control, etc...).
  • Page 7 MMI (Man Machine Interface) Operator front panel ThyVisor Setting and monitoring software Log file A text file that lists actions that have occurred (ThyVisor). J2SE Java Platform Standard Edition Software Firmware Upgrade Firmware upgrade eXtensible Markup Language NC020 - Manual - 05 - 2022 INTRODUCTION...
  • Page 8 ON delay timer with reset ( delay) OUTPUT RESET RESET INPUT ON delay timer without reset ( delay) OUTPUT INPUT DROP OFF delay timer (dropout) without reset ( delay) DROP DROP OUTPUT Symbols.ai NC020 - Manual - 05 - 2022 INTRODUCTION...
  • Page 9 DROP INPUT Minimum pulse width operation for output relays ( OUTPUT INPUT Latched operating mode for output relays and LEDs Latched OUTPUT INPUT Pulse operating mode for output relays OUTPUT Symbols1 .ai NC020 - Manual - 05 - 2022 INTRODUCTION...

  • Page 10: General

    Filter capacitor banks consist of capacitor bank and series connected air core. Their task is to ab- sorb the harmonic currents generated by loads and all above mentioned power electronic devices. The aim of NC020 is to provide a reliable and cost effective solution for such an application granting capacitor bank safe operations.

  • Page 11: Photo

    (start-trip). • The event recorder (SER) runs continuously capturing in circular mode the last fifty events upon trigger of binary input/output. • Digital fault recorder (DFR) in COMTRADE format (oscillography). NC020 - Manual - 05 - 2022 GENERAL...

  • Page 12: Technical Data

    • Air discharge 8 kV Reference standards EN 60255-22-3 IEC 60255-22-3 EN 61000-4-3 IEC 61000-4-3 Radiated radio-frequency fields • 80...1000 MHz AM 80% 10 V/m • 900 MHz Pulse modulated 10 V/m NC020 - Manual - 05 - 2022 TECHNICAL DATA...

  • Page 13: Emission

    250 V Overvoltage category — Certifications Reference standards Product standard for measuring relays EN 50263 CE Conformity • EMC Directive 2014/30/EC • Low Voltage Directive 2014/35/EC • Type tests IEC 60255-6 NC020 - Manual - 05 - 2022 TECHNICAL DATA...

  • Page 14: Input Circuits

    300 mW (5 V/ 5 mA) Life: • Mechanical operations Electrical operations Minimum pulse width (K1t ...K4t 0.01...0.50 s (step 0.01 s) Note 1 The different versions must be select on order NC020 - Manual - 05 - 2022 TECHNICAL DATA...

  • Page 15: Mmi

    = RMS value of fundamental component for neutral current, = compensation setting for neutral current). Note 6 Setting of the compensation parameters are available inside the Set \ IN Compensation menu. NC020 - Manual - 05 - 2022 TECHNICAL DATA...

  • Page 16: Phase Overcurrent - 50/51 Rms

    CLP (I > 0.100...10.00 I 0.100...0.999 I (step 0.001 I 1.00...10.00 I (step 0.01 I I> Operating time (t > 0.02...60.0 s 0.02...9.99 s (step 0.01 s) 10.0...60.0 s (step 0.1 s) NC020 - Manual - 05 - 2022 TECHNICAL DATA...

  • Page 17: Phase Overcurrent - 50/51 Fundamental

    50N/51N First threshold definite time (I > 0.100...10.00 I 0.100...0.999 I (step 0.001 I 1.00...10.00 I (step 0.01 I Note 1 The computed residual current I (vectorial sum of the phase currents) is employed NC020 - Manual - 05 - 2022 TECHNICAL DATA...

  • Page 18: Peak Overvoltage - 59H

    Trip I>, I>>, I>>>, IE>, IE>>,IN>AL, IN>, IN>>, U>, U>>, U>>> BF Time delay (t 0.06...10.00 s (step 0.01 s) Operate time accuracy 5% or ± 10 ms Note 1 The computed peak voltage is employed NC020 - Manual - 05 - 2022 TECHNICAL DATA...

  • Page 19: Control And Monitoring

    INC Comp exe command Note 6 N MOD calib available inside the Commands\Compensation\Set compensation menu NC020 - Manual - 05 - 2022 TECHNICAL DATA...

  • Page 20: Function Characteristics

    The circuit board additionally comprises: INPUT CIRCUITS: • Three binary input circuits, The logical input circuits and the block circuits include photo-couplers which provide for galvanic separation. OUTPUT CIRCUITS: • Four output relays (k1...K4). NC020 - Manual - 05 - 2022 FUNCTION CHARACTERISTICS...

  • Page 21: Cpu Board

    • An eight keys 8 keyboard, • a backlight LCD display, • Eight signalling LEDs, • RS232 communication port. Note 1 The phase and neutral rated currents must be adjusted by means dip-switch. NC020 - Manual - 05 - 2022 FUNCTION CHARACTERISTICS...

  • Page 22: Software Description

    This handles the menus, available both on the panel and by means of Modbus messages, which may be run from commands using the keyboard, LEDs and LCD display. MMI information is stored in EEPROM and may be loaded remotely by means of the basic protocol functions. NC020 - Manual - 05 - 2022 FUNCTION CHARACTERISTICS...

  • Page 23: Data Base (Application/Drivers)

    Xml files used for communication. The automatic code generation criteria ensures the quality of the result in terms of the reusability, verifiability and maintainability of the software life cycle. NC020 - Manual - 05 - 2022 FUNCTION CHARACTERISTICS...

  • Page 24: I/O Description

    L 3 -2 nd 2 L 3 -2 3 rd 2 L 3 RMS L3RMS IL 1R MS . ai • Unbalanced neutral current (RMS value of the fundamental component) I ACQUISITION ≈ IN. ai NC020 - Manual - 05 - 2022 FUNCTION CHARACTERISTICS...
  • Page 25 ϕ ϕ ϕ (Phi (° ) Fa se .a i • Peak voltages V ACQUISITION ∑ ⋅ ≈ ⋅ ⋅ ⋅ ⋅ pk(1...3) π V 1 V 2V 3. a i NC020 - Manual - 05 - 2022 FUNCTION CHARACTERISTICS...

  • Page 26: Use Of Measured Values

       Fault ...     Fault 19     DIGITAL FAULT RECORDER (OSCILLOGRAPHY) Record 1     Record 2     NC020 - Manual - 05 - 2022 FUNCTION CHARACTERISTICS...

  • Page 27: Binary Inputs

    The input activation drives an expressly programmed output relay. Remote reset IN3 t O F F Logic IN3 t O N n.c. IN3 t IN3 t n.o. Binary input IN3 Binary input allocation for remote reset Remote-reset.ai NC020 - Manual - 05 - 2022 FUNCTION CHARACTERISTICS...

  • Page 28: Output Relays

      Note 1 Reduced breaking capacity for the K3 relay compared to that of relay K1, K2 and K4. Note 2 All output relay are unassigned in the default setting. NC020 - Manual - 05 - 2022 FUNCTION CHARACTERISTICS...

  • Page 29: Led Indicators

     Start I<< (Start I<<)  Trip I<< (Trip I<<)  TD State   CB OPEN  CB CLOSED Note 1 The LEDs 5 lights when the discharge time expires NC020 - Manual - 05 - 2022 FUNCTION CHARACTERISTICS...

  • Page 30: Communication Interfaces

    Note 1 After installation, the same communication port must be selected to define the ThyVisor parameters (typically COM4, COM5,...). NC020 - Manual - 05 - 2022 FUNCTION CHARACTERISTICS...

  • Page 31: Protective Elements

    = 100 A • Measurement reading mode - With Reading Relative setting all measures are related to the nominal value, - With Reading Direct setting all measures are related to the primary value. NC020 - Manual - 05 - 2022 FUNCTION CHARACTERISTICS...

  • Page 32: Undercurrent - 37

    First element undercurrent element - logic diagram Fun-F37_S1.ai Start I<< I<< I<<ST-K START-L L1RMS I<< ≤ L1RMS I<<deflogic <<def ≥1 L2RMS <<def I<<TR-K & TRIP-L L3RMS Trip I<< Second element undercurrent element - logic diagram Fun-F37_S2.ai NC020 - Manual - 05 - 2022 FUNCTION CHARACTERISTICS...

  • Page 33: Td Discharge Time

    & L2RMS I< Element LED 5 L3RMS min[ L 1RMS, L2RMS L2RMS 0.100 I< Start 0.100 s I< Trip Delay timer output TD Dscharge Discharge timer (TD) - logic diagram TD.ai NC020 - Manual - 05 - 2022 FUNCTION CHARACTERISTICS...

  • Page 34: Neutral Unbalance Current - 46N

    Note 1 Compensation is possible only if the following two conditions are satisfied: - the IL1 phase current is greater than 0.1 In - the RMS value of fundamental component of the unbalance current ( ) is less than 0.5 NC020 - Manual - 05 - 2022 FUNCTION CHARACTERISTICS...
  • Page 35 BLOCK Neutral unbalance current (46N) - Alarm element logic diagram (IN> 46NAL.ai Note 1 The common settings concerning the Breaker failure protection are adjustable inside the Breaker Failure - BF menu. NC020 - Manual - 05 - 2022 FUNCTION CHARACTERISTICS...
  • Page 36 CB OPEN CB CLOSED CB OPEN 0.1 s INCLP>> Output t INCLP>> HIGH THRESHOLD/ LOW THRESHOLD/ HIGH THRESHOLD/ BLOCK UNBLOCK BLOCK Neutral unbalance current (46N) - Second element logic diagram (IN>>) 46N-S2.ai NC020 - Manual - 05 - 2022 FUNCTION CHARACTERISTICS...

  • Page 37: Phase Overcurrent - 50/51 Rms

    Timers-F50-51.ai Note 1 When the input value is more than 20 times the set point , the operate time is limited to the value corresponding to 20 times the set point NC020 - Manual - 05 - 2022 FUNCTION CHARACTERISTICS...
  • Page 38 RMS phase overcurrent (50/51 RMS) - First element logic diagram (I>) Fun_50-51-RMS.ai Note 1 The common settings concerning the Breaker failure protection are adjustable inside the Breaker Failure - BF menu. NC020 - Manual - 05 - 2022 FUNCTION CHARACTERISTICS...

  • Page 39: Fundamental Phase Overcurrent - 50/51

    I>> element fundamental phase overcurrent timers - 50/51 Note 1 When the input value is more than 20 times the set point , the operate time is limited to the value corresponding to 20 times the set point NC020 - Manual - 05 - 2022 FUNCTION CHARACTERISTICS...
  • Page 40 UNBLOCK BLOCK Fundamental phase overcurrent (50/51) - I>> element logic diagram Fun_50-51-S2.ai Note 1 The common settings concerning the Breaker failure protection are adjustable inside the Breaker Failure - BF menu. NC020 - Manual - 05 - 2022 FUNCTION CHARACTERISTICS...
  • Page 41 CB CLOSED CB OPEN CB State 0.1 s CLP>>> Output t >>> HIGH THRESHOLD/ LOW THRESHOLD/ HIGH THRESHOLD/ BLOCK UNBLOCK BLOCK Fundamental phase overcurrent (50/51) - I>>> element logic diagram Fun_50-51-S3.ai NC020 - Manual - 05 - 2022 FUNCTION CHARACTERISTICS...

  • Page 42: Residual Overcurrent - 50N/51N

    Set \ 50N-51N \ IE>Element (IE>>Element ) \ IE>Setpoints (IE>> Setpoints) menus. Note 1 The common settings concerning the Breaker failure protection are adjustable inside the Breaker Failure - BF menu. NC020 - Manual - 05 - 2022 FUNCTION CHARACTERISTICS...
  • Page 43 CB CLOSED CB OPEN CB State 0.1 s IECLP>> Output t >> IECLP HIGH THRESHOLD/ LOW THRESHOLD/ HIGH THRESHOLD/ BLOCK UNBLOCK BLOCK Residual overcurrent (50N/51N) - IE>> element logic diagram Fun_50-51-S3.ai NC020 - Manual - 05 - 2022 FUNCTION CHARACTERISTICS...

  • Page 44: Peak 0Vervoltage - 59H

    Set \ 59H \ U>Element (U>>Element, U>>>Element) \ U>Setpoints (U>> Set- points, U>>> Setpoints) menus. Note 1 The common settings concerning the Breaker failure protection are adjustable inside the Breaker Failure - BF menu. NC020 - Manual - 05 - 2022 FUNCTION CHARACTERISTICS...
  • Page 45 CB CLOSED CB OPEN CB State 0.1 s UCLP> Output t > UCLP HIGH THRESHOLD/ LOW THRESHOLD/ HIGH THRESHOLD/ BLOCK UNBLOCK BLOCK Peak overvoltage (59H) - U> element logic diagram Fun_59H-S1.ai NC020 - Manual - 05 - 2022 FUNCTION CHARACTERISTICS...
  • Page 46 CB CLOSED CB OPEN CB State 0.1 s UCLP>> Output t >> UCLP HIGH THRESHOLD/ LOW THRESHOLD/ HIGH THRESHOLD/ BLOCK UNBLOCK BLOCK Peak overvoltage (59H) - U>> element logic diagram Fun_59H-S2.ai NC020 - Manual - 05 - 2022 FUNCTION CHARACTERISTICS...
  • Page 47 CB CLOSED CB OPEN CB State 0.1 s UCLP>>> Output t >>> UCLP HIGH THRESHOLD/ LOW THRESHOLD/ HIGH THRESHOLD/ BLOCK UNBLOCK BLOCK Peak overvoltage (59H) - U>>> element logic diagram Fun_59H-S3.ai NC020 - Manual - 05 - 2022 FUNCTION CHARACTERISTICS...

  • Page 48: Breaker Failure - Bf

    ON≡CB Closed & Trip BF & Logic INx t INx t n.c. INx t INx t n.o. Binary input INx Trip int-prot Logic diagram concerning the breaker failure element -BF Fun-BF_Pro-n.ai NC020 - Manual - 05 - 2022 FUNCTION CHARACTERISTICS...

  • Page 49: Control And Monitoring

    It is assigned to the IN2 binary input. 52b is the auxiliary contact in the breaker that is in the opposite position as the breaker (52b open = CB closed). It is assigned to the IN1 binary input. NC020 - Manual - 05 - 2022 FUNCTION CHARACTERISTICS...

  • Page 50: Test

    Note 1 The test is performed (LED) even if the concerning element is assigned to almost one output relay Note 2 The test is performed (LED & relays) even if the concerning element is assigned to almost one output relay NC020 - Manual - 05 - 2022 FUNCTION CHARACTERISTICS...

  • Page 51: Measures, Logic States And Counters

    Note 2 Fault 0 is the newest event, while the Fault 19 is the oldest event Note 3 Counter is updated at any new record; it may be cleared by means ThyVisor NC020 - Manual - 05 - 2022 MEASURES, LOGIC STATES AND COUNTERS...

  • Page 52: Event Recording - Events

    Note 1 The newest event data are stored inside the event addressed by the Last event parameter (1...50) Note 2 Counter is updated at any new record; it may be cleared by means ThyVisor NC020 - Manual - 05 - 2022 MEASURES, LOGIC STATES AND COUNTERS...

  • Page 53: Oscillography - Dfr

    = 50 Hz is 640 ms Note 1 The oscillographic recorder requires a licence; to purchase it please contact Thytronic. Note 2 COMTRADE format; (Common Format for Transient Data); This is a standard for the data exchange for various types of tests or simulation data, etc, for power system applications.
  • Page 54 Display example Fault record oscillo-phase.ai NC020 - Manual - 05 - 2022 MEASURES, LOGIC STATES AND COUNTERS...

  • Page 55: Installation

    • Remove the upper tile and open the little door to access the fastening screws. Removing tie to access the fastening screws Remove-tile.ai • The fixed case is fastened by means of four screws onto the panel as indicated in the drawing. NC020 - Manual - 05 - 2022 INSTALLATION...
  • Page 56 482.6 START START START START TRIP TRIP TRIP TRIP Rack mounting Rack-mount.ai To allow opening of the keyboard door a one unit space must be provided when several rack are overlapping mounted. NC020 - Manual - 05 - 2022 INSTALLATION...

  • Page 57: Electrical Connections

    Examples of connection diagrams are reported on Appendix to this manual. CAUTION Devices must be installed by qualified personnel only. No liability is accepted from Thytronic due to improper use. For the A1...A22 connections and E1...E3 (RS485), screw terminals with following characteristics are available: •...
  • Page 58 It is advisable to verify that the technical characteristic of the contacts be suitable for the applied load (about current, nominal voltage, make and break current , etc..). All contacts are shown in de-energized state for standard reference NC020 - Manual - 05 - 2022 INSTALLATION...
  • Page 59 Termination resistors allow adjusting the impedance of the line, reducing the influence of the induc- tive components of the same, which might compromise good communication. Pro-N NA016 ≅ SUPERVISION UNIT RS485 BLOUT- BLOUT+ 120 Ω FRONT PANEL RS485-wiring.ai NC020 - Manual - 05 - 2022 INSTALLATION...

  • Page 60: Nominal Current I N And I En Setting

    - eliminate any potential differences between the human body and the device by touching the metallic case, - avoid touching the printed circuit and connections (tracks, component terminals), - avoid handing the device to others, - set the programming DIPs by using antistatic tools. NC020 - Manual - 05 - 2022 INSTALLATION...
  • Page 61 Dip-switch localization concerning the nominal current setting inside the front board Note 1 Place switches 1 ... 4 according to the number on the printed circuit board (not considering the numbers on the component) NC020 - Manual - 05 - 2022 INSTALLATION...

  • Page 62: Led Allocation

    • The auxiliary voltage in the panel falls within the operative range of relays. • The rated current of the line CT’s corresponds to the settings of relay. • All wirings are correct. • All screws are tightly screwed. NC020 - Manual - 05 - 2022 INSTALLATION...

  • Page 63: Programming And Settings

    SW ThyVisor The ThyVisor sw is a “browser” of data (setting, measure, etc..); it implements an engine that is afford to rebuild the menu set up and the relationships to data concerning all Thytronic protective relays by means of XML files.

  • Page 64: Mmi (Man Machine Interface)

    “E” to be replaced by the symbol “!”. On must be remember that changes are NOT active until the Note 1 Setting changes are enabled when the La mEnabling setting by MMI parameter is set NC020 - Manual - 05 - 2022 SETTING AND COMMISSIONING...

  • Page 65: Test

    • Test I>>> led • Test ..• Test I<< led • Test I> full • Test I>> full • Test I>>> full • Test ..• Test I<< full Example NC020 - Manual - 05 - 2022 SETTING AND COMMISSIONING...

  • Page 66: Communication

    Differently from the Set menu the changes are stored and became active immediately without the Store command. Note 1 The tests are only active when the selected function is assigned to a relay NC020 - Manual - 05 - 2022 SETTING AND COMMISSIONING...

  • Page 67: Menu Tree

    2.00000 In Last fault F-V1 2.0000 Vn F-V2 0.0000 Vn F-V3 0.0000 Vn F-Year 2012 F-Month F-Day F-Hour 10 h F-Minute 20 m PROCEED SET MENU’ F-Second F-Millisecond 0 ms NC020_read.ai NC020 - Manual - 05 - 2022 SETTING AND COMMISSIONING...
  • Page 68 50N/51N tIECLP>> 0.50 s tIE>>RES 0.00 s IE>>def 10.0 In I>>> Setpont IE>> Element I>>> Definite IECLP>>def 2.00 In tIE>>def 0.20 s PROCEED SET MENU’ PROCEED PROFILE A MENU’ NC020_set.ai NC020 - Manual - 05 - 2022 SETTING AND COMMISSIONING...
  • Page 69 Test I>>> led Test IE> led Test U>>> led Test I<< led Test Test I> full Test I>> full Test I>>> full Test IE> full Test U>>> full Test I<< full NC020_set1.ai NC020 - Manual - 05 - 2022 SETTING AND COMMISSIONING...

  • Page 70: Maintenance

    NC020 - Manual - 05 - 2022 SETTING AND COMMISSIONING...

  • Page 71: Appendix

    Note 2 When the input value is more than 20 times the set point , the operate time is limited to the value corresponding to 20 times the set point Nota 3 With setting more than 2.5 In, the upper limit of the measuring range is limited to 40 In. NC020 - Manual - 05 - 2022 APPENDIX...

  • Page 72: Phase Overcurrent 50/51 - Standard Inverse Time Curve (Iec 60255-3/Bs142 Type A)

    10 s 0.5 s 0.2 s 0.1 s 0.02 s /I> 0.01 7 8 9 10 I /I>> Note: match of operating and setting time takes place when I/I> = 700 F_51-IECA-Char.ai NC020 - Manual - 05 - 2022 APPENDIX...

  • Page 73: Phase Overcurrent 50/51 - Very Inverse Time Curve (Iec 60255-3/Bs142 Type B)

    10 s 0.5 s 0.1 s 0.2 s 0.02 s /I> 0.01 I /I>>inv 7 8 9 10 Note: match of operating and setting time takes place when I/I> = 14.5 F_51-IECB-Char.ai NC020 - Manual - 05 - 2022 APPENDIX...

  • Page 74: Phase Overcurrent 50/51 - Extremely Inverse Time Curve (Iec 60255-3/Bs142 Type C)

    10 s 0.02 s 0.1 s 0.2 s 0.5 s /I > 0.01 7 8 9 10 I /I >> Note: match of operating and setting time takes place when I/I> F_51-IECC-Char.ai NC020 - Manual - 05 - 2022 APPENDIX...

  • Page 75: Appendix A2 - Inverse Time Ansi/Ieee Curves

    Note 2 When the input value is more than 20 times the set point , the operate time is limited to the value corresponding to 20 times the set point Nota 3 With setting more than 2.5 In f the upper limit of the measuring range is limited to 40 In. NC020 - Manual - 05 - 2022 APPENDIX...

  • Page 76: Phase Overcurrent 50/51 - Moderately Inverse Time Curve (Ansi/Ieee Type Mi)

    10 s 0.1 s 0.5 s 0.2 s 0.02 s /I> 0.01 I /I>> 7 8 9 10 /I> Note: match of operating and setting time takes place when = 1.664 F_51-ANSIMI-Char.ai NC020 - Manual - 05 - 2022 APPENDIX...

  • Page 77: Phase Overcurrent 50/51 - Very Inverse Time Curve (Ansi/Ieee Type Vi)

    10 s 0.02 s 0.1 s 0.2 s 0.5 s /I> 0.01 I /I>> 7 8 9 10 /I> Note: match of operating and setting time takes place when = 2.306 F_51-ANSIVI-Char.ai NC020 - Manual - 05 - 2022 APPENDIX...

  • Page 78: Phase Overcurrent 50/51 - Extremely Inverse Time Curve (Ansi/Ieee Type Ei)

    0.02 s 0.1 s 10 s 0.2 s 0.5 s /I> 0.01 I /I>> 7 8 9 10 /I> Note: match of operating and setting time takes place when = 2.789 F_51-ANSIEI-Char.ai NC020 - Manual - 05 - 2022 APPENDIX...

  • Page 79: Appendix A3 - Capacitor Curves

    , the upper limit is 50 I Note 1 When the input value is more than 20 times the set point , the operate time is limited to the value corresponding to 20 times the set point NC020 - Manual - 05 - 2022 APPENDIX...

  • Page 80: Rms Phase Overcurrent 50/51 Rms - Capacitor Curve

    = 0.02 s > = 0.1 s > = 1.0 s > = 10 s > = 60 s 0.01 /I>inv 9 10 Operating characteristic concerning the Phase overcurrent RMS element (50/51 RMS) F_51RMS-Capacitor-Char.ai NC020 - Manual - 05 - 2022 APPENDIX...

  • Page 81: Rms Phase Overcurrent 50/51 Fundamental - Capacitor Curve

    [s] · 1000000 100000 10000 1000 >> = 0.02 s >> = 0.1 s >> = 1.0 s >> = 10 s >> = 60 s 0.01 I /I>>inv 9 10 F_51-fond-Capacitor-Char.ai NC020 - Manual - 05 - 2022 APPENDIX...

  • Page 82: Appendix B1 - I/O Diagram

    APPENDIX B1 - I/O Diagram Circuit Breaker Monitoring Remore Reset ≅ 120Ω FRONT PANEL 1 DTR 2 GND 3 TXD 4 RXD Input-output circuits NA016-I-O.ai NC020 - Manual - 05 - 2022 APPENDIX...

  • Page 83: Appendix B2 - Interfaces

    APPENDIX B2 - Interfaces 120Ω FRONT PANEL 1 DTR 2 GND 3 TXD 4 RXD Interfaces.ai NC020 - Manual - 05 - 2022 APPENDIX...

  • Page 84: Appendix B3 - Connection Diagrams

    All diagram must be considered just as example; they cannot be comprehensive for real applications. For all diagrams the output contacts are shown in de-energized state for standard reference. 50/51 50/51RMS 50N/51N 50BF CB position CIrcuit Breaker Monitoring Remote Reset NC020-SCH.ai NC020 - Manual - 05 - 2022 APPENDIX...

  • Page 85: Appendix C - Dimensions

    LED 1: Trip of the I>, I>>, I>>> elements (RMS or DFT) LED 2: Trip of the 50N, 46N elements LED 3: Trip of the 59H element LED 4: CB Open (CB position) LED 5: TD state NC020 - Manual - 05 - 2022 APPENDIX...

  • Page 86: Appendix D - Ec Declaration Of Conformity

    Piazza Mistral 7 - 20139 MILANO The undersigned manufacturer herewith declares that the product Protection relay - type NC020 is in conformity with the previsions of the following EC directives (including all applicable amendments) when installed in accordance with the installation instructions: Reference n°...

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