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Thytronic NA20 Manual

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NA20
PHASE, NEGATIVE SEQUENCE,
RESIDUAL OVERCURRENT, THERMAL IMAGE
PROTECTION RELAY
MANUAL
NA20 - Manual - 04 - 2022

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Summary of Contents for Thytronic NA20

  • Page 1 NA20 PHASE, NEGATIVE SEQUENCE, RESIDUAL OVERCURRENT, THERMAL IMAGE PROTECTION RELAY MANUAL NA20 - Manual - 04 - 2022...

  • Page 2: Table Of Contents

    Trip Circuit Supervision - 74TCS ..................................21 Selective block - BLOCK2 ....................................21 Circuit Breaker supervision ..................................21 CT supervision - 74CT ....................................21 Pilot wire diagnostic .....................................21 Demand measures ......................................21 Oscillography (DFR) ......................................22 PLC (Programmable Logic Controller) ...............................22 NA20 - Manual - 04 - 2022...
  • Page 3 Relays ..........................................112 Counters ........................................112 Self test .........................................112 Pilot wire diagnostic ....................................113 Selective Block - BLOCK2 ..................................113 Fault recording - SFR ....................................113 Event recording - SER ....................................113 Oscillography - DFR ....................................114 NA20 - Manual - 04 - 2022...
  • Page 4 8.5 APPENDIX B2 - Interfaces ....................................172 8.6 APPENDIX B3- Connection diagrams ................................ 173 8.7 APPENDIX C - Dimensions ....................................176 8.8 APPENDIX D - Setting table ..................................177 8.9 APPENDIX E - EC Declaration of conformity ............................. 208 NA20 - Manual - 04 - 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 NA20 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 NA20 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 Setting and monitoring software Log file A text file that lists actions that have occurred (ThyVisor). J2SE Java Platform Standard Edition Subnet Mask (Ethernet nomenclature) Software Firmware Upgrade Firmware upgrade eXtensible Markup Language NA20 - Manual - 04 - 2022 INTRODUCTION...
  • Page 8 EXOR logic gate INPUT ON delay timer with reset ( delay) OUTPUT RESET RESET INPUT ON delay timer without reset ( delay) OUTPUT INPUT OFF delay timer (dropout) without reset ( delay) OUTPUT Symbols.ai NA20 - Manual - 04 - 2022 INTRODUCTION...
  • Page 9 RESET 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 NA20 - Manual - 04 - 2022 INTRODUCTION...

  • Page 10: General

    G E N E R A L Preface The relay type NA20 is typically used in HV, MV and LV radial networks as feeder or power trans- former protection. In solidly grounded systems the residual overcurrent protection can be used on feeders of any length,...

  • Page 11: Main Features

    (start-trip). • The event recorder (SER) runs continuously capturing in circular mode the last three hundred events upon trigger of binary input/output. • Digital fault recorder (DFR) in COMTRADE format (oscillography). NA20 - Manual - 04 - 2022 GENERAL...

  • Page 12: Technical Data

    Electrostatic discharge • Contact discharge 6 kV • 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 NA20 - Manual - 04 - 2022 TECHNICAL DATA...

  • Page 13: Emission

    Reference voltage 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 60255-1 NA20 - Manual - 04 - 2022 TECHNICAL DATA...

  • Page 14: Input Circuits

    Short duration current (0,5 s) 30 A Minimum switching load 300 mW (5 V/ 5 mA) Life: • Mechanical operations • Electrical operations ‡ Block output (Logic selectivity) Quantity Type optocoupler NA20 - Manual - 04 - 2022 TECHNICAL DATA...

  • Page 15: Mmi

    100 Mbps • Protocol ModBus®TCP/IP Note 1 Different version must be selected at ordering Note 2 Extended list of reading variables (eg. ) Note 3 Different version must be selected at ordering NA20 - Manual - 04 - 2022 TECHNICAL DATA...

  • Page 16: General Settings

    CT’s for thermal image protection. If the secondary rated current of the line CT’s equals the rated current of the NA20 relay, as usually happens, the I value is the ratio between the rated current of the protected element and the primary rated current of the CT’s...

  • Page 17: Negative Sequence / Positive Sequence Current Ratio - I

    Asymptotic reference value: 1.1 I > Minimum operate time: 0.1 s Equation is valid for 1.1 ≤ I > ≤ 20 With I > pickup ≥ 2.5 I , the upper limit is 50 I NA20 - Manual - 04 - 2022 TECHNICAL DATA...

  • Page 18: Thermal Image - 49

    (p.u. of the basic over temperature corresponding to the basic current Assuming that the secondary rated current of the line CT’s equals the rated current of the NA20 relay, as usually happens, the value is the ratio between the rated current of the protected element and the primary rated current of the CTs 0.02...

  • Page 19: Residual Overcurrent - 50N/51N

    0.002...0.999 I (step 0.001 I 1.00...10.00 I (step 0.01 I > Operating time (t > 0.04...200 s 0.04...9.99 s (step 0.01 s) 10.0...99.9 s (step 0.1 s) 100...200 s (step 1 s) NA20 - Manual - 04 - 2022 TECHNICAL DATA...

  • Page 20: Breaker Failure - Bf

    Asymptotic reference value: 1.1 I > Minimum operate time: 0.1 s Equation is valid for 1.1 ≤ I > ≤ 20, with I > pickup ≥ 0.5 I , the upper limit is 10 I NA20 - Manual - 04 - 2022 TECHNICAL DATA...

  • Page 21: Control And Monitoring

    F I X ) • Rolling on demand period (t 1...60 min (step 1 min) ROL ) • Number of cycles for rolling on demand (N. 1...24 (step 1) ROL ) NA20 - Manual - 04 - 2022 TECHNICAL DATA...

  • Page 22: Plc (Programmable Logic Controller)

    BLK2OUT-Iph, BLK2OUT-IE,...etc Current converter Note 1 For the DFR function a licence is required; call Thytronic for purchasing. Note 2 The measures of temperature are available only when the MPT module on Thybus is enabled (eigth Pt100 inputs) Note 3 Output relay K7...K10 and binary input IN3...IN42 states are available only when the concerning I/O circuits are implemented (MRI and MID16 modules on Thybus) Note 4 For the PLC function a licence is required;...

  • Page 23: Metering

    Temperature PT3 Temperature PT4 Temperature PT5 Temperature PT6 Temperature PT7 Temperature PT8 Note 1 The measures of temperature are available only when the MPT module on Thybus is enabled (eigth Pt100 inputs) NA20 - Manual - 04 - 2022 TECHNICAL DATA...

  • Page 24: Function Characteristics

    Input BLOCK I/O BLKIN Input BLKOUT Uaux RELAYS Output contacts K1...K6 POWER SUPPLY BOARD hw.ai Printed boards hold the circuit components arranged according to a modular allocation of the main functions. NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...

  • Page 25: Power Supply Board

    The removable plug allows separation of the MMI module for free access to the CPU board when DIP-switch setting is required. Note 1 The phase and residual nominal currents must be adjusted by means dip-switch. NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...

  • Page 26: Software Description

    Example are: • Keyboard management • RTC (Real Time Clock) updating • RAM/EEPROM updating • Diagnostic • Input acquisition • Output relay management • MMI • I/O updating • DSP data processing NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...

  • Page 27: 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. NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...

  • Page 28: I/O Description

    • Direct • Calculated • Phase • Sequence • Harmonic • Demand Direct • Frequency. The measure of period is taken from current inputs. ACQUISITION ≈ ≈ (Hz) ≈ F. a i NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 29 L 3 F I X L x F I X L x n F I X F I X F I X F I X F I X Fi x-De ma nd . ai NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 30 Media aritmetica nell’inervallo L1MIN R OL ∑ L 2 MIN L x MIN L x n L 3 MIN Reset Min-Demand.ai Use of over-described measures is shown in the following tables. NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...

  • Page 31: Conventions

    L1, L2, L3 ordered, while an inverse cyclic sequence is defined when the three phases are L1, L3, L2 ordered. D i re c t se q u e nce cy cl i c order I nv er se s equence cy cl i c order fasori1.ai NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...

  • Page 32: Use Of Measured Values

     Record 2              Record ...              NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...

  • Page 33: Binary Inputs

     Open CB    Close CB    Preset DTheta (thermal image preset)    Remote trip    Reset on demand measures    NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 34 Note 1 To enable the profile switching the “Input-selected” parameter must be set inside the “Profile selection” submenu. If multiple setting groups are not required, Group A is the default selection NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 35 Note 4 The activation of one binary input produces indiscriminately a block of all protective elements programmed for being blocked from Block1 NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 36 Binary input INx Binary input allocation for CB state acquisition CB-pos.ai Note 1 The reset of the total counters is practicable by means ThyVisor command with Session Level 1 (available with password) NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 37 Remote trip n.c. INx t INx t n.o. Binary input INx Binary input allocation for remote trip Remote-trip.ai Reset on demand measures The input activation make a reset of all demand measures. NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...

  • Page 38: Output Relays

    - No-latched , in order that it stays ON for normal conditions and the other way round it goes OFF if any fault is detected and/or the auxiliary supply turns OFF. NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 39 Close CB command relays (CBclose-K)       Remote tripping relays (RemTrip-K)       Not received pulses at BLIN signalling relays (PulseBLIN-K)       NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...

  • Page 40: Led Indicators

    Note 1 The START and the TRIP LED are user assignable to any function; other than starting and tripping information can be assigned to them too, just the same for L1...L5 Note 2 All LEDs are unassigned in the default setting. NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 41      Remote tripping LEDs (RemTrip-L)        Not received pulses at BLIN signalling LEDs (PulseBLIN-L)        NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...

  • Page 42: Communication Interfaces

    • RS485 port on the rear side for bus communication. • Ethernet port on the rear side for bus communication. To connect the local port you need to use a cable USB Type B - Type A; the Thytronic cable code L10042 can be supplied.

  • Page 43: Protective Elements

    It must be programmed to the same value of the residual CT(s) primary nominal current. Example 1 NA20 = 100 A /1 A = 1 A Es1-IEn.ai The residual CT primary current I must be set as: I = 100 A NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 44 Measures may be displayed according the following operating modes: - With RELATIVE setting all measures are related to the nominal value, - With PRIMARY setting all measures are related to the primary value. NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...

  • Page 45: Thermal Protection With Rtd Thermometric Probes - 26

    0 . 2 5 s 0 . 2 5 s 0 . 2 5 s Pt1...8 update t-refresh-F26.ai Note 1 The 26 menu is available when the MPT module is enabled NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 46 - 26 \ PTx Probe \ ThALx Trip where x = 1...8. Note 1 The common settings concerning the Breaker failure protection are adjustable inside the Breaker Failure - BF menu. NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...

  • Page 47: Undercurrent - 37

    The parameter may be adjusted independently for both profiles A or B. Note 1 The description of the logical block (Block 1) function may be found in the “Logic Block” paragraph inside CONTROL AND MONITORING section. NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 48 Block1 INx t INx t n.c. INx t Block1 input (ON≡Block) INx t Block1 n.o. Binary input INx Logic diagram concerning the threshold (I<) of the undercurrent element - 37 Fun-F37_S1.ai NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...

  • Page 49: Negative Sequence Overcurrent - 46

    Set \ Profile A(or B) \ Negative sequence overcurrent-46 \ I2>> Element \ Setpoints menu. 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 NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 50 Note 1 The common settings concerning the Breaker failure protection are adjustable inside the Breaker Failure - BF menu. NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 51 Note 1 The exhaustive treatment of the logical block (Block 1) function may be found in the “Logic Block” paragraph inside CONTROL AND MONITOR- ING section Note 2 The exhaustive treatment of the selective block (Block 2) function may be found in the “Selective Block” paragraph inside CONTROL AND MON- ITORING section NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 52 CB OPEN 0.1 s > 2CLP Output t 2CLP> HIGH THRESHOLD/ LOW THRESHOLD/ HIGH THRESHOLD/ BLOCK UNBLOCK BLOCK Negative sequence overcurrent (46) - Logic diagram of the first threshold (I2>) 46S1-diagram.ai NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 53 >> Block2 OUT ≥1 BLOUT1 >>> Block2 OUT Pilot wire output ST-IE BLK2 Block2 output Negative sequence overcurrent (46) - Logic diagram of the blocking signals concerning the first element (I2>) 46S1_BL-diagram.ai NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 54 CB OPEN 0.1 s >> 2CLP Output t >> 2CLP HIGH THRESHOLD/ LOW THRESHOLD/ HIGH THRESHOLD/ BLOCK UNBLOCK BLOCK Negative sequence overcurrent (46) - Logic diagram of the second threshold (I2>>) 46S2-diagram.ai NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 55 >> Block2 OUT ≥1 BLOUT1 >>> Block2 OUT Pilot wire output ST-IE BLK2 Block2 output Negative sequence overcurrent (46) - Logic diagram of the blocking signals concerning the second element (I2>>) 46S2_BL-diagram.ai NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...

  • Page 56: Negative Sequence Current / Positive Sequence Current Ratio - I2/I1

    Set \ Profile A(or B) \ Negative sequence current/positive sequence current ratio-I2/I1 \ I21> Element \ Setpoints menu. Note 1 The common settings concerning the Breaker failure protection are adjustable inside the Breaker Failure - BF menu. NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 57 Note 1 The setting may be found in the “CT supervision ” paragraph inside CONTROL AND MONITORING section Note 2 The description of the logical block (Block 1) function may be found in the “Logic Block” paragraph inside CONTROL AND MONITORING section NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...

  • Page 58: Thermal Image - 49

    • The upper limit is 20 I Note 1 Assuming that the secondary rated current of the line CT’s equals the rated current of the NA20 relay, as usually happens, the IB value is the ratio between the rated current of the protected component (line, transformer,...) and the primary rated current of the CT’s.
  • Page 59 Note 3 The common settings concerning the Breaker failure protection are adjustable inside the Breaker Failure - BF menu. NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 60 Note 1 The exhaustive treatment of the logical block (Block 1) function may be found in the “Logic Block” paragraph inside CONTROL AND MONITOR- ING section Note 2 The exhaustive treatment of the selective block (Block 2) function may be found in the “Selective Block” paragraph inside CONTROL AND MONITORING section NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 61 CB CLOSED CB OPEN 0.1 s DthCLP Output t DthCLP HIGH THRESHOLD/ LOW THRESHOLD/ HIGH THRESHOLD/ BLOCK UNBLOCK BLOCK Thermal image (49) - Logic diagram of the first alarm threshold Fun_49_AL1.ai NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 62 >> Block2 OUT F-IE ≥1 BLOUT1 >>> Block2 OUT Pilot wire output ST-IE BLK2 Block2 output Thermal image (49) - Logic diagram of the blocking signals concerning the first alarm element NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 63 CB CLOSED CB OPEN 0.1 s DthCLP Output t DthCLP HIGH THRESHOLD/ LOW THRESHOLD/ HIGH THRESHOLD/ BLOCK UNBLOCK BLOCK Thermal image (49) - Logic diagram of the second alarm threshold Fun_49_AL2.ai NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 64 >> Block2 OUT F-IE ≥1 BLOUT1 >>> Block2 OUT Pilot wire output ST-IE BLK2 Block2 output Thermal image (49) - Logic diagram of the blocking signals concerning the second alarm element 49AL2_BL-diagram.ai NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 65 CB OPEN CB CLOSED CB OPEN 0.1 s DthCLP Output t DthCLP HIGH THRESHOLD/ LOW THRESHOLD/ HIGH THRESHOLD/ BLOCK UNBLOCK BLOCK Thermal image (49) - Logic diagram of the trip threshold Fun_49_Dth.ai NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 66 >> Block2 OUT F-IE ≥1 BLOUT1 >>> Block2 OUT Pilot wire output ST-IE BLK2 Block2 output Thermal image (49) - Logic diagram of the blocking signals concerning the trip element 49_BL-diagram.ai NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 67 [s] 10000 1000 0 .0 0 .6 0 .8 1 .0 0.01 7 8 9 10 Operating characteristic concerning the thermal image element (49) - T=1 min F_49-1min-Char.ai NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 68 [s] 100000 10000 1000 0 .0 0 .6 0 .8 1 .0 7 8 9 10 Operating characteristic concerning the thermal image element (49) - T = 200 min F_49-200min-Char.ai NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...

  • Page 69: Phase Overcurrent - 50/51

    B) \ Phase overcurrent-50/51 \ I> Element \ Setpoints menu. 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 NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 70 Set \ Profile A(or B) \ Phase overcurrent-50/51 \ I> Element (I>> Element, I>>> Element) \ Setpoints menus. Note 1 The common settings concerning the Breaker failure protection are adjustable inside the Breaker Failure - BF menu. NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 71 & & Block1 I>>>BF I>>>BF Trip I>>> & Start I>>> I>>>BLK2IN BLK2INI>>> & & Block2 I>>>BLK2OUT BLK2OUT Start I>>> & General logic diagram of the phase overcurrent elements - 50/51 all-F50-51.ai NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 72 Note 1 The exhaustive treatment of the logical block (Block 1) function may be found in the “Logic Block” paragraph inside CONTROL AND MONITOR- ING section Note 2 The exhaustive treatment of the selective block (Block 2) function may be found in the “Selective Block” paragraph inside CONTROL AND MONITORING section NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 73 CB OPEN CB CLOSED CB OPEN 0.1 s CLP> Output t CLP> HIGH THRESHOLD/ LOW THRESHOLD/ HIGH THRESHOLD/ BLOCK UNBLOCK BLOCK Phase overcurrent (50/51) - First element logic diagram (I>) Fun_50-51S1.ai NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 74 >> Block2 OUT F-IE ≥1 BLOUT1 >>> Block2 OUT Pilot wire output ST-IE BLK2 Block2 output Phase overcurrent (50/51) - Logic diagram of the blocking signals concerning the first element (I>) 50-51S1_BL-diagram.ai NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 75 CB OPEN CB CLOSED CB OPEN 0.1 s CLP>> Output t > > HIGH THRESHOLD/ LOW THRESHOLD/ HIGH THRESHOLD/ BLOCK UNBLOCK BLOCK Phase overcurrent (50/51) - Second element logic diagram (I>>) Fun_50-51S2.ai NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 76 >> Block2 OUT F-IE ≥1 BLOUT1 >>> Block2 OUT Pilot wire output ST-IE BLK2 Block2 output Phase overcurrent (50/51) - Logic diagram of the blocking signals concerning the second element (I>>) 50-51S2_BL-diagram.ai NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 77 CB OPEN CB CLOSED CB OPEN 0.1 s CLP>>> Output t CLP>>> HIGH THRESHOLD/ LOW THRESHOLD/ HIGH THRESHOLD/ BLOCK UNBLOCK BLOCK Phase overcurrent (50/51) - Third element logic diagram (I>>>) Fun_50-51S3.ai NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 78 >> Block2 OUT F-IE ≥1 BLOUT1 >>> Block2 OUT Pilot wire output ST-IE BLK2 Block2 output Phase overcurrent (50/51) - Logic diagram of the blocking signals concerning the third element (I>>>) 50-51S3_BL-diagram.ai NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...

  • Page 79: Residual Overcurrent - 50N/51N

    \ IE> Element \ Setpoints menu. 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 NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 80 Note 1 The common settings concerning the Breaker failure protection are adjustable inside the Breaker Failure - BF menu. Note 2 The exhaustive treatment of the logical block (Block 1) function may be found in the “Logic Block” paragraph inside CONTROL AND MONITOR- ING section NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 81 & & Block1 IE>>>BF IE>>>BF & Trip IE>>> Start IE>>> IE>>>BLK2IN BLK2INIE>>> & & Block2 IE>>>BLK2OUT BLK2OUT Start IE>>> & General logic diagram of the residual overcurrent elements - 50N/51N all-F50N-51N.ai NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 82 \ Selective block OUT menu. Note 1 The exhaustive treatment of the selective block (Block 2) function may be found in the “Selective Block” paragraph inside CONTROL AND MONITORING section NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 83 CB OPEN CB CLOSED CB OPEN 0.1 s ECLP> Output t ECLP> HIGH THRESHOLD/ LOW THRESHOLD/ HIGH THRESHOLD/ BLOCK UNBLOCK BLOCK Residual overcurrent (50N/51N) - First element logic diagram (IE>) Fun_50N-51NS1.ai NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 84 F-IE IE>BLK2OUT ≥1 BLOUT1 (ON≡Enable) >>> Block2 OUT Pilot wire output ST-IE BLK2 Block2 output Residual overcurrent (50N/51N) - Logic diagram of the blocking signals concerning the first element (IE>) 50N-51NS1_BL-diagram.ai NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 85 CB CLOSED CB OPEN 0.1 s E CLP>> Output t > ECLP > HIGH THRESHOLD/ LOW THRESHOLD/ HIGH THRESHOLD/ BLOCK UNBLOCK BLOCK Residual overcurrent (50N/51N) - Second element logic diagram (IE>>) Fun_50N-51NS2.ai NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 86 BLOUT1 Block2 output >>> Block2 OUT Pilot wire output IE>>BLK2OUT (ON≡Enable) ST-IE BLK2 Block2 output Residual overcurrent (50N/51N) - Logic diagram of the blocking signals concerning the second element (IE>>) 50N-51NS2_BL-diagram.ai NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 87 CB CLOSED CB OPEN 0.1 s ECLP>>> Output t >> ECLP > HIGH THRESHOLD/ LOW THRESHOLD/ HIGH THRESHOLD/ BLOCK UNBLOCK BLOCK Residual overcurrent (50N/51N) - Third element logic diagram (IE>>>) Fun_50N-51NS3.ai NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 88 >>> Block2 OUT Pilot wire output & Block2 output IE>>>BLK2OUT ST-IE BLK2 (ON≡Enable) Block2 output Residual overcurrent (50N/51N) - Logic diagram of the blocking signals concerning the third element (IE>>>) 50N-51NS3_BL-diagram.ai NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...

  • Page 89: Breaker Failure - Bf

    (52nd or 52b ) may suffice Note 2 The exhaustive treatment of the logic block (Block 1) function may be found in the “Logic Block” paragraph inside CONTROL AND MONITORING section NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 90 BLK1 BF & Block1 Logic INx t INx t n.c. INx t Block1 input (ON≡Block) INx t Block1 n.o. Binary input INx Logic diagram concerning the breaker failure element -BF Fun-BF_Pro-n.ai NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...

  • Page 91: Control And Monitoring

    Note 1 In the following treatment, the logical block is defined as “Logical block” or “Block1” Note 2 The Block 1 signal forces a timer reset NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 92 50N-51N1 element Binary input INx (I2/I1)>BLK1 (I2/I1)> element 74TCSBLK1 74TCS element BFBLK1 BF element S<BLK1 74CT element Block1 info Block1 (internal state) Logic diagram concerning the logic block element -Block1 Block1_L.ai NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...

  • Page 93: Selective Block -Block2

    When a binary input is programmed for selective block input, the IN1 tON, INx tON, IN1 tOFF and INx tOFF time delays must be reset to zero; the Logic parameters (ON/OFF) must be programmed in the same way of the related output relay connected with-it. NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 94 Note 1 In the absence of suitable provisions, a short circuit on a pilot wire causes the block of the receiving relay, so a possible fault (contemporary or following) inside the protected zone, cannot be cleared that being the case the protective relay blocked. NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 95 (the selectivity will be lost). Start xx (internal elements) BLK2OUT-Iph BLK2OUT-IE BLK2OUT-Iph/IE F-IPh, F-IE, F-IPh/IE F-IPh, F-IE, F-IPh/IE tF timers TF-timer.ai NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 96 Note 1 Full diagnostic of pilot wires is only available when committed pilot wire input/outputs are employed Note 2 When several outputs are parallel linked the pulse emission must be enabled inside one device only, sooner inside the outermost device NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 97 = 0.100 s • I>>BLK2IN = ON • I>>BLK2OUT = ON • PulseBLIN1 = 1 s • PulseBLOUT1 = OFF • t = 0.25 s F-IPh • t = 0.30 s B-IPh NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...

  • Page 98: Remote Tripping

    Remote trip Remote trip Logic INx t O N INx t O F F Remote trip RemTrip-K n.c. INx t INx t n.o. RemTrip-L Binary input INx Remote tripping logic diagram Fun-Remote-trip.ai NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...

  • Page 99: Frequency Tracking

    54 Hz 63Hz 0.25 I Locked frequency (Displayed value) 60 Hz (0 Hz) f (Hz) Frequency tracking IF.ai All protective elements are always operative; accuracy is guaranteed inside locked frequency band. NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...

  • Page 100: Second Harmonic Restraint - 2Ndh-Rest

    (No-latched inside Set \ Relays menu) and the Logic parameters (Energized/De-energized) must be programmed in the same way of the related binary input connected with-it. NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...

  • Page 101: Cold Load Pickup - Clp

    CB OPEN CB State CB CLOSED (52a=ON) (52a=OFF) (52a=OFF) 0.1 s CLPxx Output t TRANSIENT THRESHOLD/ STEADY STATE TRANSIENT THRESHOLD/ BLOCK THRESHOLD/UNBLOCK BLOCK Cold Load Pickup logic diagram - CLP CLP-diagram.ai NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 102 \ Profile A(or B) \ Phase overcurrent - 50/51\ I> Element \ Definite time menu. CB position can be acquired by means one or two binary inputs; allocation of 52a and 52b func- tions is available inside the Set \ Inputs \ Binary input1(x) menu. NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...

  • Page 103: Ct Supervision - 74Ct

    CT monitoring logic diagram - 74CT Fun-74CT.ai Note 1 The exhaustive treatment of the logic block (Block 1) function may be found in the “Logic Block” paragraph inside CONTROL AND MONITORING section NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...

  • Page 104: Trip Circuit Supervision - 74Tcs

    (Block 1) function may be found in the “Logic Block” paragraph inside CONTROL AND MONITORING section Note 2 Following assumption are considered for the framework: Logic: ON, Timers t and t reset to zero OFF: TRIP contact of the protection: DE-energized, No latched NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 105 Outputs are reset to zero after 6 s from the TRIP contact open. Note 1 The trip contact (TRIP) of the protection relays must be set with automatic reset (No-latched operating mode). NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 106 ) / 2 = (103.7 + 30425) / 2 = 15264 Ω ~ 15 k Ω (Power dissipated by the R resistor) = U /R = 110 / 15000 = 0.8 W NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...

  • Page 107: Circuit Breaker Supervision

    (tbreak>) is exceeded, an output relay and/or LED can be activated. The four criteria can be contemporaneously or separately set. All the named parameters are available inside the Set \ Circuit Breaker supervision \ CB Diagnostic menu. NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 108 SumIL1^2t SumIL2^2t SumIL3^2t CB Diagnostic - Cumulative tripping energy I2t Mode-tOpen State tbreak Ktrig-break break tbreak-K & tbreak-L ≥ From CB position Opening transition CB Diagnostic - CB operating time Fun-CB-diagnostic.ai NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...
  • Page 109 Minima frequenza Derivata di frequenza Mancata apertura interruttore 74TCS Monitoraggio del circuito di apertura dell’interruttore Richiusura automatica per fotovoltaico (opzionale) Note 1 For a detailed description please refer to the application notes NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...

  • Page 110: Demand Measures

    Nota 1 The 26 menu is available when the MPT module is enabled Nota 2 The output relay K7...K10 and binary input IN3...IN45 states is meaningful when the I/O circuits are present (MRI and MID16 modules) NA20 - Manual - 04 - 2022 FUNCTION CHARACTERISTICS...

  • Page 111: Measures, Logic States And Counters

    • 52a ON/OFF • 52b ON/OFF • Open CB ON/OFF • Close CB ON/OFF • Thermal image presetting ON/OFF • Remote trip ON/OFF • Reset on demand measures NA20 - Manual - 04 - 2022 MEASURES, LOGIC STATES AND COUNTERS...

  • Page 112: Relays

    • Total PLC I/O assigned not-matching • PLC I/O assigned not-matching OK/NOT OK • MMI module Boot OK/NOT OK • MMI module Run-time OK/NOT OK • MRI module Boot OK/NOT OK • MRI module Run-time NA20 - Manual - 04 - 2022 MEASURES, LOGIC STATES AND COUNTERS...

  • Page 113: Pilot Wire Diagnostic

    Note 4 Event 0 is the newest event, while the Event 299 is the oldest event Note 5 Counter is updated at any new record; it may be cleared by means ThyVisor NA20 - Manual - 04 - 2022 MEASURES, LOGIC STATES AND COUNTERS...

  • Page 114: Oscillography - Dfr

    (34 + 20 · 4 + 4 · 4 + 2) · (0.25 + 0.25) Note 1 Data are stored into non-volatile memory; they are retained once power is turned off. NA20 - Manual - 04 - 2022 MEASURES, LOGIC STATES AND COUNTERS...
  • Page 115 N = int · = 75 60 (Hz) (34 + 20 · 4 + 4 · 4 + 2) · (0.50 + 0.50) Phase/to/phase fault record Phase/to/earth fault record NA20 - Manual - 04 - 2022 MEASURES, LOGIC STATES AND COUNTERS...

  • Page 116: Installation

    The depth dimension, as indicated in the drawing, must be increased by as much as needed to allow room for the wiring. START TRIP 102.5 ±0.3 N.4 holes ø 3,5 Flush-mount.ai Flush mounting NOTE Separation of fixed and removable parts is NOT required NA20 - Manual - 04 - 2022 INSTALLATION...
  • Page 117 START TRIP Projecting mounting Projecting.ai NA20 - Manual - 04 - 2022 INSTALLATION...
  • Page 118 Cutout dimension and mounting steps concerning the separate operator panel are the same for the flushing mounting (see previous pages. 212.5 128.5 START TRIP N.4 fori ø 4,5 Separate operator panel Separate-mount.ai A standard direct shielded cable with RJ45 connectors must be used for connections. Separate-mount1.ai NA20 - Manual - 04 - 2022 INSTALLATION...
  • Page 119 482.6 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. NA20 - Manual - 04 - 2022 INSTALLATION...

  • Page 120: Electrical Connections

    Examples of connection diagrams are reported on Appendix to this manual. Devices must be installed by qualified personnel only. CAUTION No liability is accepted from Thytronic due to improper use. For the A1...A22 connections, screw terminals with following characteristics are available: • Nominal cross section: 0.14...2.5 mm...
  • Page 121 The same considerations also apply when the sensor is positioned near bends in the cabling. It is recommended that the transformer be placed away from bends in the conductors). Fig. 2a Fig. 2b Fig. 2c Current balanced transformer Toroide.ai NA20 - Manual - 04 - 2022 INSTALLATION...
  • Page 122 • Position input wiring away from high energy sources. • Set a debounce timer (tON and/or tOFF) to alloy the transient to decay. • Use shielded cables with ground connection on only one end (preferably at the relay side. NA20 - Manual - 04 - 2022 INSTALLATION...
  • Page 123 For security reasons, a change of the Ethernet communication parameters become active only after an hw reset. RS485 port RS485 communication circuit connections must be made using screened twisted pair cable observ- NA20 - Manual - 04 - 2022 INSTALLATION...
  • Page 124 Pro-N Pro-N ≅ SUPERVISION UNIT RS485 BLOUT- BLOUT+ 120 Ω FRONT PANEL RS485-wiring.ai Thybus port In order to extend I/O capability, the Pro_N relays can be customized through external auxiliary mod- NA20 - Manual - 04 - 2022 INSTALLATION...
  • Page 125 THYBUS OUTPUT 54 53 42 41 38 37 36 35 IN10 OUTPUT INPUT IN11 MODULO INGRESSI REMOTI MID-16 IN12 IN13 1 2 3 4 5 6 7 8 9 IN14 IN15 IN16 NA20 - Manual - 04 - 2022 INSTALLATION...
  • Page 126 One MRI module, two MID16 modules, one MPT module, one MCI module and one MMI module (separate operator panel) can be connect at the same time to the Thybus port (maximum expansion). NA20 - Manual - 04 - 2022 INSTALLATION...
  • Page 127 Block out signals concerning the NA21 devices (S3.1, S3.2 e S3.3) are split on two isolated outputs by means of MRB devices (B2.1, B2.2 and B2.3) to allow proper selectivity logic operation. Nota 1 All diagram must be considered just as example; they cannot be comprehensive for real applications. NA20 - Manual - 04 - 2022 INSTALLATION...
  • Page 128 NA20 - Manual - 04 - 2022 INSTALLATION...
  • Page 129 Accelerated logic example NA20 - Manual - 04 - 2022 INSTALLATION...

  • Page 130: Nominal Current I N And I En Setting

    • Remove the auxiliary supply Unplug the RS485, RJ45 cables (Ethernet and/or Thybus). • Remove the upper tile and open the little door to access the fastening screws. Removing tie to access the fastening screws Remove-tile.ai NA20 - Manual - 04 - 2022 INSTALLATION...
  • Page 131 • Unscrew gradually back to back the four fastening screw in order avoid loss of the internal wash- Unmounting of the case from the switchboard is not needed. Unmounting set-in.ai • Split the MMI module and disconnect cable Split MMI module from fixed module Split-MMI.ai NA20 - Manual - 04 - 2022 INSTALLATION...
  • Page 132 - 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. NA20 - Manual - 04 - 2022 INSTALLATION...
  • Page 133 Dip-switch localization concerning the nominal current setting inside the CPU board set-In.ai • Reassemble all parts with the previous operations in reverse order. • Reconnect the RS485 and RJ45 cables (Ethernet and/or Thybus). NA20 - Manual - 04 - 2022 INSTALLATION...

  • Page 134: Led Allocation

    • The auxiliary voltage in the panel falls within the operative range of Pro_N relays. • The rated current (1 A or 5 A) of the line CT’s corresponds to the setting of Pro_N relays. • All wirings are correct. • All screws are tightly screwed. NA20 - Manual - 04 - 2022 INSTALLATION...

  • Page 135: 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 136: Mmi (Man Machine Interface)

    “SELF-TEST “PILOT WIRE DIAGNOSTIC >>” “SELECTIVE BLOCK BLOCK2 >>” “FAULT RECORDING >>” “EVENTS RECORDING >>” Setting modifying (SET) Note 1 Setting changes are enabled when the La mEnabling setting by MMI parameter is set NA20 - Manual - 04 - 2022 SETTING AND COMMISSIONING...
  • Page 137 • Press the Enter button for a few seconds; new message appears: “Confirm settings?” • Answer to the message ENTER: YES to confirm changes or RESET: NO to abort. The end of the LED blinking points out the end of procedure. NA20 - Manual - 04 - 2022 SETTING AND COMMISSIONING...

  • Page 138: Test

    • Answer to the message ENTER: YES to confirm changes or RESET: NO to abort. The end of the LED blinking points out the end of procedure. Note 1 Instantly all the relays are switched in rest state, including relays programmed as “normally energized” NA20 - Manual - 04 - 2022 SETTING AND COMMISSIONING...

  • Page 139: Circuit Breaker Commands

    START and TRIP LEDs and by appearance of the pointer on the bottom • Change the parameters by means the Up (increment) or Down (decrement) buttons, using the Left and Right keys to move to the previous or next character NA20 - Manual - 04 - 2022 SETTING AND COMMISSIONING...

  • Page 140: Modules Management

    IN14...IN29 with one MID16 module IN30...IN45 with two MID16 modules Output relays K1...K6 on board K7...K10 with MRI module LEDs: ON, START, TRIP, L1...L5 on board L6...L10 with MRI module NA20 - Manual - 04 - 2022 SETTING AND COMMISSIONING...

  • Page 141: Maintenance

    NA20 - Manual - 04 - 2022 SETTING AND COMMISSIONING...

  • Page 142: Appendix

    Nota 3 With setting more than 2.5 In for the 50/51 elements and 0.5 IEn for the 50N/51N elements, the upper limit of the measuring range is limited to 50 In and 10 IEn respectively. NA20 - Manual - 04 - 2022 APPENDIX...

  • Page 143: Negative Sequence Overcurrent 46 - Standard Inverse Time Curve (Iec 60255-3/Bs142 Type A)

    = 0.2 s > = 0.1 s > = 0.02 s 0.01 > 7 8 9 10 Note: match of operating and setting time takes place when I > = 700 F_46-IECA-Char.ai NA20 - Manual - 04 - 2022 APPENDIX...

  • Page 144: Negative Sequence Overcurrent 46 - Very Inverse Time Curve (Iec 60255-3/Bs142 Type B)

    = 0.1 s > = 0.2 s > = 0.02 s > 0.01 7 8 9 10 Note: match of operating and setting time takes place when I > = 14.5 F_46-IECB-Char.ai NA20 - Manual - 04 - 2022 APPENDIX...

  • Page 145: Negative Sequence Overcurrent 46 - Extremely Inverse Time Curve (Iec 60255-3/Bs142 Type C)

    = 0.2 s > = 0.5 s > = 0.02 s > = 0.1 s > 0.01 7 8 9 10 Note: match of operating and setting time takes place when I > F_46-IECC-Char.ai NA20 - Manual - 04 - 2022 APPENDIX...

  • Page 146: Phase Overcurrent 50/51 - Standard Inverse Time Curve (Iec 60255-3/Bs142 Type A)

    = 0.2 s t> = 0.1 s t> = 0.02 s 0.01 I /I>inv 7 8 9 10 Note: match of operating and setting time takes place when I/I> = 700 F_51-IECA-Char.ai NA20 - Manual - 04 - 2022 APPENDIX...

  • Page 147: Phase Overcurrent 50/51 - Very Inverse Time Curve (Iec 60255-3/Bs142 Type B)

    = 0.1 s t> = 0.2 s t> = 0.02 s 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 NA20 - Manual - 04 - 2022 APPENDIX...

  • Page 148: Phase Overcurrent 50/51 - Extremely Inverse Time Curve (Iec 60255-3/Bs142 Type C)

    = 0.02 s t> = 0.1 s t> = 0.2 s t> = 0.5 s I/I> 0.01 7 8 9 10 Note: match of operating and setting time takes place when I/I> F_51-IECC-Char.ai NA20 - Manual - 04 - 2022 APPENDIX...

  • Page 149: Phase Overcurrent 50/51 - Long Time Inverse Curve (Iec Bs B Li)

    = 0.2 s t> = 0.1 s t> = 0.02 s 0.01 I /I>inv 7 8 9 10 Note: match of operating and setting time takes place when I/I> = 121 F_51-IEC-LTI-Char.ai NA20 - Manual - 04 - 2022 APPENDIX...

  • Page 150: Residual Overcurrent 50N/51N - Standard Inverse Time Curve (Iec 60255-3/Bs142 Type A)

    = 0.2 s E>inv = 0.1 s E>inv = 0.02 s E>inv 0.01 > 7 8 9 10 Note: match of operating and setting time takes place when I > = 700 F_51N-IECA-Char.ai NA20 - Manual - 04 - 2022 APPENDIX...

  • Page 151: Residual Overcurrent 50N/51N - Very Inverse Time Curve (Iec 60255-3/Bs142 Type B)

    = 0.1 s E>inv = 0.2 s E>inv = 0.02 s E>inv > 0.01 7 8 9 10 Note: match of operating and setting time takes place when I > = 14.5 F_51N-IECB-Char.ai NA20 - Manual - 04 - 2022 APPENDIX...

  • Page 152: Residual Overcurrent 50N/51N - Extremely Inverse Time Curve (Iec 60255-3/Bs142 Type C)

    = 0.02 s E> = 0.1 s E> = 0.2 s E> = 0.5 s > 0.01 7 8 9 10 Note: match of operating and setting time takes place when I > F_51-IECC-Char.ai NA20 - Manual - 04 - 2022 APPENDIX...

  • Page 153: Residual Overcurrent 50N/51N - Long Time Inverse Curve (Iec Bs B Li)

    = 0.2 s E>inv = 0.1 s E>inv = 0.02 s E>inv 0.01 > 7 8 9 10 Note: match of operating and setting time takes place when I > = 121 F_51N-IEC-LTI-Char.ai NA20 - Manual - 04 - 2022 APPENDIX...

  • Page 154: Appendix A2 - Inverse Time Ansi/Ieee Curves

    Nota 3 With setting more than 2.5 In for the 50/51 elements and 0.5 IEn for the 50N/51N elements, the upper limit of the measuring range is limited to 50 In and 10 IEn respectively. NA20 - Manual - 04 - 2022 APPENDIX...

  • Page 155: Negative Sequence Overcurrent 461 - Moderately Inverse Time Curve (Ansi/Ieee Type Mi)

    = 0.02 s > = 0.2 s > = 0.5 s > 0.01 7 8 9 10 Note: match of operating and setting time takes place when I > = 1.664 F_46-ANSIMI-Char.ai NA20 - Manual - 04 - 2022 APPENDIX...

  • Page 156: Negative Sequence Overcurrent 46 - Very Inverse Time Curve (Ansi/Ieee Type Vi)

    = 0.2 s > = 0.5 s > = 1 s 0.01 > 7 8 9 10 Note: match of operating and setting time takes place when I > = 2.306 F_67-ANSIVI-Char.ai NA20 - Manual - 04 - 2022 APPENDIX...

  • Page 157: Negative Sequence Overcurrent 46 - Extremely Inverse Time Curve (Ansi/Ieee Type Ei)

    = 5 s > = 1 s > = 0.5 s > 0.01 7 8 9 10 Note: match of operating and setting time takes place when I > = 2.789 F_46-ANSIEI-Char.ai NA20 - Manual - 04 - 2022 APPENDIX...

  • Page 158: Phase Overcurrent 50/51 - Moderately Inverse Time Curve (Ansi/Ieee Type Mi)

    = 0.5 s t> = 0.2 s t> = 0.02 s I/I> 0.01 7 8 9 10 Note: match of operating and setting time takes place when I/I> = 1.664 F_51-ANSIMI-Char.ai NA20 - Manual - 04 - 2022 APPENDIX...

  • Page 159: Phase Overcurrent 50/51 - Very Inverse Time Curve (Ansi/Ieee Type Vi)

    = 0.2 s t> = 0.5 s = 1 s t> 0.01 I/I> 7 8 9 10 Note: match of operating and setting time takes place when I/I> = 2.306 F_51-ANSIVI-Char.ai NA20 - Manual - 04 - 2022 APPENDIX...

  • Page 160: Phase Overcurrent 50/51 - Extremely Inverse Time Curve (Ansi/Ieee Type Ei)

    = 0.5 s = 5 s t> t> = 1 s I/I> 0.01 7 8 9 10 Note: match of operating and setting time takes place when I/I> = 2.789 F_51-ANSIEI-Char.ai NA20 - Manual - 04 - 2022 APPENDIX...

  • Page 161: Residual Overcurrent 50N/51N - Moderately Inverse Time Curve (Ansi/Ieee Type Mi)

    = 0.5 s > = 0.2 s > = 0.02 s > 0.01 7 8 9 10 Note: match of operating and setting time takes place when I > = 1.664 F_51N-ANSIMI-Char.ai NA20 - Manual - 04 - 2022 APPENDIX...

  • Page 162: Residual Overcurrent 50N/51N - Very Inverse Time Curve (Ansi/Ieee Type Vi)

    = 0.2 s > = 0.5 s = 1 s > > 0.01 7 8 9 10 Note: match of operating and setting time takes place when I > = 2.306 F_51N-ANSIVI-Char.ai NA20 - Manual - 04 - 2022 APPENDIX...

  • Page 163: Residual Overcurrent 50N/51N - Extremely Inverse Time Curve (Ansi/Ieee Type Ei)

    = 0.5 s = 5 s > > = 1 s > 0.01 7 8 9 10 Note: match of operating and setting time takes place when I > = 2.789 F_51N-ANSIEI-Char.ai NA20 - Manual - 04 - 2022 APPENDIX...

  • Page 164: Appendix A3 - Inverse Time - Rectifier, I T And Em Curves

    Nota 3 With setting more than 2.5 In for the 50/51 elements and 0.5 IEn for the 50N/51N elements, the upper limit of the measuring range is limited to 50 In and 10 IEn respectively. NA20 - Manual - 04 - 2022 APPENDIX...

  • Page 165: Phase Overcurrent 50/51 - Rectifier Curves

    = 0.5 s t> = 0.1 s t> = 0.02 s t> = 0.1 s I/I> 0.01 7 8 9 10 Note: match of operating and setting time takes place when I/I> F_51-RI-Char.ai NA20 - Manual - 04 - 2022 APPENDIX...

  • Page 166: Negative Sequence Overcurrent 46 - I T Inverse Curves (I2T=K)

    = 1 s > = 0.5 s > = 0.2 s > = 0.02 s > = 0.1 s 0.01 Note: match of operating and setting time takes place when I > F_46-I2t-Char.ai NA20 - Manual - 04 - 2022 APPENDIX...

  • Page 167: Phase Overcurrent 50/51 - I T Inverse Curves (I2T=K)

    = 0.2 s t> = 0.02 s t>> = 0.02 s t> = 0.1 s t>> = 0.1 s 0.01 Note: match of operating and setting time takes place when I/I> F_51-I2t-Char.ai NA20 - Manual - 04 - 2022 APPENDIX...

  • Page 168: Negative Sequence Overcurrent 46 - Electromechanical Inverse Curves (Em)

    =t > · [-0.236 I> + 0.339] · 1000 > = 0.02 s > = 0.1 s 0.01 Note: match of operating and setting time takes place when I > F_46-EM-Char.ai NA20 - Manual - 04 - 2022 APPENDIX...

  • Page 169: Phase Overcurrent 50/51 - Electromechanical Inverse Curves (Em)

    10000 0.28 t =t> · [-0.236 (I/I> + 0.339] · 1000 t> = 0.02 s t> = 0.1 s 0.01 Note: match of operating and setting time takes place when I/I> F_51-EM-Char.ai NA20 - Manual - 04 - 2022 APPENDIX...

  • Page 170: Residual Overcurrent 50N/51N - Electromechanical Inverse Curves (Em)

    Residual overcurrent 50N/51N - Electromechanical inverse curves (EM) t [s] 10000 1000 > = 0.02 s > = 0.1 s 0.01 Note: match of operating and setting time takes place when I > F_51N-EM-Char.ai NA20 - Manual - 04 - 2022 APPENDIX...

  • Page 171: Appendix B1 - I/O Diagram

    APPENDIX B1 - I/O Diagram NA20 THYBUS BLOUT- BLOUT+ ≅ FRONT PANEL I/O schematic diagram (five binary inputs version) NA10-I-O.ai NA20 - Manual - 04 - 2022 APPENDIX...

  • Page 172: Appendix B2 - Interfaces

    OUTPUT INPUT MODULO 4 RELE’ + 8 INGRESSI DIGITALI MID8 MODULO INGRESSI REMOTI 4 RELAYS + 8 BINARY INPUTS MODULE 1 2 3 4 5 6 7 8 9 FRONT PANEL Interfaces.ai NA20 - Manual - 04 - 2022 APPENDIX...

  • Page 173: Appendix B3- Connection Diagrams

    For all diagrams the output contacts are shown in de-energized state for standard reference. L1 L2 L3 NA20 ≅ BLOUT- BLOUT+ FRONT PANEL Schema di collegamento dei circuiti d’entrata con tre TA di fase e corrente residua da traformatore toroidale sommatore NA20 - Manual - 04 - 2022 NA20-SCH.ai APPENDIX...
  • Page 174 NA20 50/51 74CT 50BF 50N/51N CB position Schema di collegamento dei circuiti d’entrata con due TA di fase e corrente residua da traformatore toroidale sommatore NA20-SCH2.ai NA20 - Manual - 04 - 2022 APPENDIX...
  • Page 175 NA20 50/51 74CT 50BF 50N/51N CB position NA20-SCH4.ai Schema di collegamento dei circuiti d’entrata con tre TA di fase e corrente residua dal ritorno dei TA di fase (Holmgreen) NA20 - Manual - 04 - 2022 APPENDIX...

  • Page 176: Appendix C - Dimensions

    SEPARATE PROJECTING MOUNTING PROJECTING MOUNTING (Separate operator panel) (Stand alone) OPERATOR PANEL RACK MOUNTING FLUSH MOUNTING CUTOUT 482.6 102.5 ±0.3 START START START START TRIP TRIP TRIP TRIP N.4 holes ø 3.5 NA20 - Manual - 04 - 2022 APPENDIX...

  • Page 177: Appendix D - Setting Table

    Active-ON | Active-OFF IN3 tON 0.00 ... 9.99 step = 0.01 Value 10.0 ... 100.0 step = 0.1 IN3 tOFF 0.00 ... 9.99 step = 0.01 Value 10.0 ... 100.0 step = 0.1 NA20 - Manual - 04 - 2022 APPENDIX...
  • Page 178 0 ... 500 step = 5 Logic De-energized | Energized Operation MODE No-latched | Pulse | Latched Minimum pulse width 0 ... 500 step = 5 LEDs START Type No-latched | Latched TRIP Type No-latched | Latched NA20 - Manual - 04 - 2022 APPENDIX...
  • Page 179 PT1 Probe ThAL1 Alarm ThAL1 Enable ThAL1 Enable OFF | ON 26 PT1 Alarm threshold ThAL1 0 ... 200 step = 1 ThAL1 Operating time Value 0 ... 100 step = 1 NA20 - Manual - 04 - 2022 APPENDIX...
  • Page 180 START | TRIP | L1 | L2 | L3 | L4 | L5 | Th>4 Trip Th>4 Enable Th>4 Enable OFF | ON 26 PT4 Trip threshold Th>4 0 ... 200 step = 1 Th>4 Operating time NA20 - Manual - 04 - 2022 APPENDIX...
  • Page 181 K1 | K2 | K3 | K4 | K5 | K6 | Th>7 Trip LEDs Th>7-L START | TRIP | L1 | L2 | L3 | L4 | L5 | PT8 Probe ThAL8 Alarm NA20 - Manual - 04 - 2022 APPENDIX...
  • Page 182 I2> Trip relays I2>TR-K K1 | K2 | K3 | K4 | K5 | K6 | I2> Start LEDs I2>ST-L START | TRIP | L1 | L2 | L3 | L4 | L5 | NA20 - Manual - 04 - 2022 APPENDIX...
  • Page 183 Setpoints I21CLP> Mode I21CLP> Mode OFF | ON - Element blocking | ON - Change setting I21CLP> Activation time 0.00 ... 9.99 step = 0.01 Value 10.0 ... 100.0 step = 0.1 NA20 - Manual - 04 - 2022 APPENDIX...
  • Page 184 Dth> Breaker failure Dth>BF OFF | ON Disabling Dth> by 50-51 start Dth>disby50-51 OFF | ON Dth> Trip relays Dth>-K K1 | K2 | K3 | K4 | K5 | K6 | NA20 - Manual - 04 - 2022 APPENDIX...
  • Page 185 0.00 ... 9.99 step = 0.01 Value 10.0 ... 100.0 step = 0.1 I>> Reset time delay 0.00 ... 9.99 step = 0.01 Value 10.0 ... 100.0 step = 0.1 I>> Logical block I>>BLK1 OFF | ON NA20 - Manual - 04 - 2022 APPENDIX...
  • Page 186 START | TRIP | L1 | L2 | L3 | L4 | L5 | Definite time 50/51 Third threshold definite time State OFF | ON 0.100 ... 0.999 step = 0.001 Pickup value 1.00 ... 9.99 step = 0.01 10.0 ... 40.0 step = 0.1 NA20 - Manual - 04 - 2022 APPENDIX...
  • Page 187 IECLP>> Activation time 0.00 ... 9.99 step = 0.01 Value 10.0 ... 100.0 step = 0.1 tE>> Reset time delay 0.00 ... 9.99 step = 0.01 Value 10.0 ... 100.0 step = 0.1 NA20 - Manual - 04 - 2022 APPENDIX...
  • Page 188 Value 0.03 ... 10.00 step = 0.01 Second Harmonic Restraint - 2ndh-REST Second harmonic restraint threshold State OFF | ON Pickup value 10 ... 50 step = 1 I2ndh> reset time delay NA20 - Manual - 04 - 2022 APPENDIX...
  • Page 189 START | TRIP | L1 | L2 | L3 | L4 | L5 | BF Trip LEDs BF-TR-L START | TRIP | L1 | L2 | L3 | L4 | L5 | Profile B Base current IB NA20 - Manual - 04 - 2022 APPENDIX...
  • Page 190 START | TRIP | L1 | L2 | L3 | L4 | L5 | PT4 Probe ThAL4 Alarm ThAL4 Enable ThAL4 Enable OFF | ON 26 PT4 Alarm threshold ThAL4 0 ... 200 step = 1 NA20 - Manual - 04 - 2022 APPENDIX...
  • Page 191 K1 | K2 | K3 | K4 | K5 | K6 | ThAL7 Alarm LEDs ThAL7-L START | TRIP | L1 | L2 | L3 | L4 | L5 | Th>7 Trip Th>7 Enable Th>7 Enable OFF | ON NA20 - Manual - 04 - 2022 APPENDIX...
  • Page 192 I2CLP> Activation time 0.00 ... 9.99 step = 0.01 Value 10.0 ... 100.0 step = 0.1 I2> Reset time delay 0.00 ... 9.99 step = 0.01 Value 10.0 ... 100.0 step = 0.1 NA20 - Manual - 04 - 2022 APPENDIX...
  • Page 193 OFF | ON 0.100 ... 0.999 step = 0.001 Pickup value 1.00 ... 40.00 step = 0.01 0.100 ... 0.999 step = 0.001 I2>>def within CLP I2CLP>>def 1.00 ... 40.00 step = 0.01 NA20 - Manual - 04 - 2022 APPENDIX...
  • Page 194 K1 | K2 | K3 | K4 | K5 | K6 | DthAL2 Alarm LEDs DthAL2-L START | TRIP | L1 | L2 | L3 | L4 | L5 | Dth> Element Dth> Enable Dth> Enable OFF | ON NA20 - Manual - 04 - 2022 APPENDIX...
  • Page 195 1.00 ... 20.00 step = 0.01 0.02 ... 9.99 step = 0.01 I>inv Operating time t>inv 10.0 ... 60.0 step = 0.1 I>> Element Setpoints I>> Enable I>> Enable OFF | ON NA20 - Manual - 04 - 2022 APPENDIX...
  • Page 196 I>>> Start relays I>>>ST-K K1 | K2 | K3 | K4 | K5 | K6 | I>>> Trip relays I>>>TR-K K1 | K2 | K3 | K4 | K5 | K6 | NA20 - Manual - 04 - 2022 APPENDIX...
  • Page 197 0.002 ... 0.999 step = 0.001 IE>inv within CLP IECLP>inv 1.00 ... 2.00 step = 0.01 0.02 ... 9.99 step = 0.01 IE>inv Operating time tE>inv 10.0 ... 60.0 step = 0.1 IE>> Element Setpoints NA20 - Manual - 04 - 2022 APPENDIX...
  • Page 198 OFF | ON 0.002 ... 0.999 step = 0.001 Pickup value 1.00 ... 10.00 step = 0.01 0.002 ... 0.999 step = 0.001 IE>>>def within CLP IECLP>>>def 1.00 ... 10.00 step = 0.01 NA20 - Manual - 04 - 2022 APPENDIX...
  • Page 199 BF Residual current threshold State OFF | ON Pickup value 0.01 ... 2.00 step = 0.01 BF Time delay Value 0.06 ... 10.00 step = 0.01 BF Logical block BF-BLK1 OFF | ON NA20 - Manual - 04 - 2022 APPENDIX...
  • Page 200 | 74 | 75 | 76 | 77 | 78 | 79 | 80 | 81 | 82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | 90 | 91 | 92 | 93 | 94 | 95 | 96 | 97 | 98 | 99 NA20 - Manual - 04 - 2022 APPENDIX...
  • Page 201 60 ... 299 step = 1 300 ... 3600 step = 10 0.0 ... 59.9 step = 0.1 Timer 14 60 ... 299 step = 1 300 ... 3600 step = 10 NA20 - Manual - 04 - 2022 APPENDIX...
  • Page 202 START | TRIP | L1 | L2 | L3 | L4 | L5 | Circuit breaker opening time diagnostic LEDs tbreak-L START | TRIP | L1 | L2 | L3 | L4 | L5 | CT supervision - 74CT NA20 - Manual - 04 - 2022 APPENDIX...
  • Page 203 0.05 ... 60.00 step = 0.05 Element pickup trigger ON | OFF Trigger from outputs K1 | K2 | K3 | K4 | K5 | K6 | Binary input trigger ON | OFF NA20 - Manual - 04 - 2022 APPENDIX...
  • Page 204 IN28 | IN29 | IN30 | IN31 | IN32 | IN33 | IN34 | IN35 | IN36 | IN37 | IN38 | IN39 | IN40 | IN41 | IN42 | IN43 | IN44 | IN45 | Off NA20 - Manual - 04 - 2022 APPENDIX...
  • Page 205 IN28 | IN29 | IN30 | IN31 | IN32 | IN33 | IN34 | IN35 | IN36 | IN37 | IN38 | IN39 | IN40 | IN41 | IN42 | IN43 | IN44 | IN45 | Off NA20 - Manual - 04 - 2022 APPENDIX...
  • Page 206 OFF | ON Type Multicast | Broadcast Multicast address Broadcast address Rx port 0 ... 20000 step = 1 Tx port 0 ... 20000 step = 1 TimeToLive(Multicast) 0 ... 20 step = 1 NA20 - Manual - 04 - 2022 APPENDIX...
  • Page 207 NA20 - Manual - 04 - 2022 APPENDIX...

  • Page 208: Appendix E - Ec Declaration Of Conformity

    Piazza Mistral 7 - 20139 MILANO The undersigned manufacturer herewith declares that the product Protection relay - type NA20 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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