Thytronic NA011 User manual

NA011 - Manual - 05 - 2022
MANUAL
NA011
PHASE & RESIDUAL OVERCURRENT,
AUTOMATIC RECLOSURE
PROTECTION RELAY

2
NA011 - Manual - 05 - 2022
TABLE OF CONTENTS
1 INTRODUCTION 5
Scope and liability...........................................................................................................................................................................................5
Applicability......................................................................................................................................................................................................5
Conformity ........................................................................................................................................................................................................5
Technical support ............................................................................................................................................................................................5
Copyright...........................................................................................................................................................................................................5
Warranty...........................................................................................................................................................................................................5
Safety recommendations...............................................................................................................................................................................5
Insulation tests ................................................................................................................................................................................................5
Product identification .....................................................................................................................................................................................6
Environment .....................................................................................................................................................................................................6
Graphical conventions ...................................................................................................................................................................................6
Glossary/definitions ........................................................................................................................................................................................6
2 GENERAL 10
Preface........................................................................................................................................................................................................... 10
Photo .............................................................................................................................................................................................................. 10
Main features.................................................................................................................................................................................................11
3 TECHNICAL DATA 12
3.1 GENERAL............................................................................................................................................................................................................12
Mechanical data ...........................................................................................................................................................................................12
Insulation ........................................................................................................................................................................................................12
EMC tests for interference immunity.........................................................................................................................................................12
Voltage dip and interruption........................................................................................................................................................................12
EMC tests for interference immunity.........................................................................................................................................................12
Emission......................................................................................................................................................................................................... 13
Mechanical tests.......................................................................................................................................................................................... 13
Climatic tests................................................................................................................................................................................................. 13
Safety ............................................................................................................................................................................................................. 13
Certifications................................................................................................................................................................................................. 13
3.2 INPUT CIRCUITS ...............................................................................................................................................................................................14
Auxiliary power supply
U
aux .......................................................................................................................................................................14
Phase current input circuits........................................................................................................................................................................14
Residual current input circuit......................................................................................................................................................................14
Binary input circuits......................................................................................................................................................................................14
3.3 OUTPUT CIRCUITS............................................................................................................................................................................................14
Output relays..................................................................................................................................................................................................14
3.4 MMI.....................................................................................................................................................................................................................15
3.5 COMMUNICATION INTERFACES ...................................................................................................................................................................15
Local port........................................................................................................................................................................................................15
Remote ports..................................................................................................................................................................................................15
3.6 GENERAL SETTINGS ........................................................................................................................................................................................15
3.7 PROTECTIVE ELEMENTS .................................................................................................................................................................................15
Phase overcurrent - 50/51............................................................................................................................................................................15
Residual overcurrent - 50N/51N .................................................................................................................................................................17
3.8 CONTROL AND MONITORING....................................................................................................................................................................... 19
Circuit Breaker monitoring ......................................................................................................................................................................... 19
Oscillography (DFR) ..................................................................................................................................................................................... 19
3.9 MEASURES ....................................................................................................................................................................................................... 19
Currents ......................................................................................................................................................................................................... 19
Digital inputs ................................................................................................................................................................................................. 19
Automatic Reclose....................................................................................................................................................................................... 19
Circuit Breaker.............................................................................................................................................................................................. 19
4 FUNCTION CHARACTERISTICS 20
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
Base protocol (kernel)..................................................................................................................................................................................22
Calibration (kernel)........................................................................................................................................................................................22

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Communication (drivers)..............................................................................................................................................................................22
MMI (drivers) .................................................................................................................................................................................................22
Data Base (application/drivers)................................................................................................................................................................. 23
Self-test (application) .................................................................................................................................................................................. 23
Development tools ....................................................................................................................................................................................... 23
4.3 I/O DESCRIPTION..............................................................................................................................................................................................24
Metering inputs .............................................................................................................................................................................................24
Signal processing..........................................................................................................................................................................................24
Use of measured values...............................................................................................................................................................................25
Binary inputs ..................................................................................................................................................................................................26
Output relays................................................................................................................................................................................................. 28
LED indicators............................................................................................................................................................................................... 29
Communication interfaces.......................................................................................................................................................................... 30
4.4 PROTECTIVE ELEMENTS .................................................................................................................................................................................31
Phase overcurrent - 50/51........................................................................................................................................................................... 33
Residual overcurrent - 50N/51N .................................................................................................................................................................36
Breaker failure - BF...................................................................................................................................................................................... 39
4.5 CONTROL AND MONITORING....................................................................................................................................................................... 40
Circuit breaker supervision ........................................................................................................................................................................ 40
Circuit breaker commands ......................................................................................................................................................................... 40
Automatic reclosure - 79..............................................................................................................................................................................41
Test..................................................................................................................................................................................................................45
Oscillography ................................................................................................................................................................................................45
5 MEASURES, LOGIC STATES AND COUNTERS 46
Measures........................................................................................................................................................................................................46
Circuit breaker ...............................................................................................................................................................................................46
Binary inputs ..................................................................................................................................................................................................46
Counters..........................................................................................................................................................................................................46
Fault recording - SFR....................................................................................................................................................................................46
Event recording - Events..............................................................................................................................................................................46
Info...................................................................................................................................................................................................................47
Protections trip ..............................................................................................................................................................................................47
Self-test...........................................................................................................................................................................................................47
Oscillography - DFR ......................................................................................................................................................................................47
6 INSTALLATION 49
6.1 PACKAGING...................................................................................................................................................................................................... 49
6.2 MOUNTING....................................................................................................................................................................................................... 49
6.3 ELECTRICAL CONNECTIONS ..........................................................................................................................................................................51
6.4 NOMINAL CURRENT InAND IEn SETTINGS................................................................................................................................................56
6.5 NOMINAL CURRENT InSETTING FOR LPCT .............................................................................................................................................. 58
6.6 LED ALLOCATION............................................................................................................................................................................................. 58
6.7 FINAL OPERATIONS ........................................................................................................................................................................................ 58
7 PROGRAMMING AND SETTINGS 59
7.1 SW ThyVisor ..................................................................................................................................................................................................... 59
ThyVisor installation..................................................................................................................................................................................... 59
ThyVisor use.................................................................................................................................................................................................. 59
7.2 MMI (Man Machine Interface) ..................................................................................................................................................................... 60
Reading variables (READ)........................................................................................................................................................................... 60
Setting modifying (SET) ............................................................................................................................................................................... 60
Test...................................................................................................................................................................................................................61
Communication..............................................................................................................................................................................................62
Reset................................................................................................................................................................................................................62
DEFAULT (Option) ..........................................................................................................................................................................................62
Data/time setting (Time) ...............................................................................................................................................................................62
Circuit breaker commands ..........................................................................................................................................................................62
7.3 MENU TREE....................................................................................................................................................................................................... 63
7.4 MAINTENANCE................................................................................................................................................................................................ 70
7.5 REPAIR............................................................................................................................................................................................................... 70
7.6 PACKAGING...................................................................................................................................................................................................... 70
8 APPENDIX 71
8.1 APPENDIX A1 - Inverse time IEC curves .....................................................................................................................................................71
Mathematical formula ..................................................................................................................................................................................71
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
Residual overcurrent 50N/51N - Standard inverse time curve (IEC 60255-3/BS142 type A) ...........................................................75
Residual overcurrent 50N/51N - Very inverse time curve (IEC 60255-3/BS142 type B)....................................................................76

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Residual overcurrent 50N/51N - Extremely inverse time curve (IEC 60255-3/BS142 type C) ..........................................................77
8.2 APPENDIX A2 - Inverse time ANSI/IEEE curves ........................................................................................................................................ 78
Mathematical formula ................................................................................................................................................................................. 78
Phase overcurrent 50/51 - Moderately inverse time curve (ANSI/IEEE type MI)............................................................................. 79
Phase overcurrent 50/51 - Very inverse time curve (ANSI/IEEE type VI) .......................................................................................... 80
Phase overcurrent 50/51 - Extremely inverse time curve (ANSI/IEEE type EI)..................................................................................81
Residual overcurrent 50N/51N - Moderately inverse time curve (ANSI/IEEE type MI) ...................................................................82
Residual overcurrent 50N/51N - Very inverse time curve (ANSI/IEEE type VI) ................................................................................ 83
Residual overcurrent 50N/51N - Extremely inverse time curve (ANSI/IEEE type EI)........................................................................84
8.3 APPENDIX A3 - Inverse time I2t curves ........................................................................................................................................................85
Formula generale ..........................................................................................................................................................................................85
Phase overcurrent 50/51 - I2t inverse curves (I2t=K) ..............................................................................................................................86
Residual overcurrent 50N/51N - I2t inverse curves (I2t=K)....................................................................................................................87
8.4 APPENDIX B1 - I/O Diagram .......................................................................................................................................................................... 88
8.5 APPENDIX B2 - Interfaces ............................................................................................................................................................................. 89
8.6 APPENDIX B3 - Connection diagrams ......................................................................................................................................................... 90
8.7 APPENDIX C - Dimensions..............................................................................................................................................................................94
8.8 APPENDIX D- EC Declaration of conformity ................................................................................................................................................95

INTRODUCTION 5
NA011 - Manual - 05 - 2022
1 INTRODUCTION1 INTRODUCTION
Scope and liability
This document describes the functions, the technical data of NA011 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.
The information given in this document is reviewed regularly; any corrections and integration will be
included in subsequent editions that are identified by the date of revision.
We appreciate any suggestions for improvement.
We reserve the right to make technical improvements without notice.
Applicability
This manual is valid for NA011 devices with firmware version 1.40 and following.
Revision history is listed in appendix.
Conformity
The product complies with the EU directives:
• EMC Council Directives: 2014/30/EU
• Low voltage Directives: 2014/35/EU
Technical support
Contact: THYTRONIC Technical Service www.thytronic.it
Copyright
All right reserved; It is forbidden to copy, modify or store material (document and sw) protected by
copyright without Thytronic consent.
Warranty
Thytronic warrants devices against defects in materials and workmanship under normal use for a
period of ONE (1) YEAR from the date of retail purchase by the original end-user purchaser (“War-
ranty Period”).
Safety recommendations
The warming contained in this document are all-important for safety; special attention must be paid
to the following symbols:
Installation and commissioning must be carried out by qualified person; Thytronic assumes no re-
sponsibility for damages caused from improper use that does not comply all warning and caution in
this manual.
In particular the following requirements must be met:
• Remove power before opening it.
• Verify the voltage absence by means suitable instrumentation on relay connections; attention must
be paid to all circuits supplied by external sources (binary input, CT, etc...)
• Care must be taken when handling metal parts (front panel, connectors).
Insulation tests
After insulation tests, hazardous voltages (capacitor charges,...) may be arise; it is advisable to grad-
ually reduce the test voltage avoiding to erase it abruptly.
WARNING Death, severe personal injury or substantial property damage can result if proper precautions
are not taken.
CAUTION Minor personal injury or property damage can result if proper precautions are not taken
CAUTION
Settings must be established on the basis of a coordination study.
Numerical values inside examples have educational purpose only; they don’t be used, in no way,
for actual applications.

INTRODUCTION 6
NA011 - Manual - 05 - 2022
Product identification
Each device is equipped with:
• Identification label installed on the front side with following informations: code number, phase and
residual nominal currents, auxiliary voltage range and CE mark:
• Test label with following informations: data, serial number and test operator signature.
Environment
The NA011 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...).
If contaminants are present (dust, corrosive substances, etc...), filters must be provided.
Graphical conventions
The CEI/IEC and ANSI symbols is employed where possible:
e.g.: 51 = ANSI code concerning the overcurrent element.
Following text formats are used:
The ThyVisor[1] menu:
Phase overcurrent -50/51
The parameter description (measures, thresholds, operate time,...) and related value:
First threshold 50/51 denite time
I>def
The display messages (MMI) are shown as:
NA011
Notes are highlighted with cursive letters inside colored bar
Note: Useful description note
Glossary/definitions
I
En Relay residual nominal current
I
Enp Residual CT primary nominal current
I
nRelay phase nominal current
I
np Phase CT primary nominal current
50/51 Phase overcurrent ANSI code
50N/51N Residual overcurrent ANSI code
79 Automatic reclosing
DFR Digital Fault Recorder (Oscillography)
SER Sequential Event Recorder
SFR Sequential Fault Recorder
ANSI American National Standard Institute
IEEE Institute of Electrical and Electronics Engineers
IEC International Electrotechnical Commission
CENELEC Comité Européen de Normalisation Electrotechnique
Note 1 The graphic interface and the operation of the ThyVisor software are described in the relative chapters
NA011#xxx0
In5A 1A
50-51
50N-51N
CB OPEN
CB CLOSED
79
5A
UAUX 24-230 Vac/dc
1
2
3
4
5
NA011#xxx1
I
I
n
n
Rated 50...500A
Extended 50...1250A
50-51
50N-51N
CB OPEN
CB CLOSED
79
UAUX
24-230 V
1
2
3
4
5
NA011#xxx2
In5A 1A
50-51
50N-51N
CB OPEN
CB CLOSED
79
5A
UAUX 24-230 Vac/dc
IEn 1A 1A 5A
1
2
3
4
5
NA011#xxx3
I
I
n
n
Rated 50...500A
Extended 50...1250A
50-51
50N-51N
CB OPEN
CB CLOSED
79
IEn 1A 1A 5A UAUX
24-230 V
1
2
3
4
5

INTRODUCTION 7
NA011 - Manual - 05 - 2022
52 o CB (Circuit Breaker) Circuit Breaker
52a Auxiliary contact in the breaker that is in the same position as the
breaker. It can be assigned to a binary input to locate the CB posi-
tion (Breaker failure and/or CB diagnostic functions). (52a open = CB
open)
52b Auxiliary contact in the breaker that is in the opposite position as the
breaker (52b open = CB closed)
K1...K4 Output relays
tTR1... tTR4 Output relay minimum pulse width
Latched Output relay with latched operation (manual reset) Output relay with
latched operation (automatic reset)
No-latched Output relay with no-latched operation (automatic reset)
CT or TA Current Transformer
LPCT Low Power Current Transformer
P1 IEC nomenclature for primary polarity mark of CTs (as an alternative to
a ANSI dot)
P2 IEC nomenclature for primary polarity mark of CTs (as an alternative to
a ANSI no-dot)
S1 IEC nomenclature for secondary polarity mark of CTs (as an alternative
to a ANSI dot)
S2 IEC nomenclature for secondary polarity mark of CTs (as an alternative
to a ANSI no-dot)
Self test Diagnostic
Start Leave an initial condition or reset condition (Pickup)
Trip Operation (with operate time)
Operating time Duration of time interval between the instant when the character-
istic quantity in reset condition is changed, under specified condi-
tions, and the instant when the relay operates
Dropout ratio The ratio of a reset value to an operate value in well-specified con-
ditions. The dropout ratio may be lower or greater than 1 according
as an over or under element is considered
Reset time Duration of the time interval between the instant when the charac-
teristic quantity in operate condition is changed, under specified
conditions, and the instant when the relay operates.
The stated reset time is related to a step variation of characteristic
quantity in operate condition to the reset condition.
Overshoot time The critical impulse time for a relay which is in its reset condition,
is the longest duration a specified change in the input energizing
quantity(ies) (characteristic quantity), which will cause the relay
to change to operate condition, can be applied without the relay
switches. The overshoot time is the difference from the operate time
and the critical impulse time.
The declared values for the overshoot time are applicable with the
lower setting value of the operation time.
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
Sw Software
Fw Firmware
Upgrade Firmware upgrade
XML eXtensible Markup Language

INTRODUCTION 8
NA011 - Manual - 05 - 2022
Symbols.ai
Symbols
I>> Start
I>> BF_OUT
IPh Block2
Logic internal signal (output); may be a logical state (e.g.I>> Start ) or a numerical value
It is available for reading (ThyVisor + communication interface)
Logic external signal (intput); may be a command coming from a binary input or a sw command
It is available for reading (ThyVisor + communication interface)
Internal signal (e.g. Breaker Failure output state concerning to the 2nd threshold of the 50 element)
It is not available for reading (missing arrow)
AND and NAND logic gates
OR and NOR logic gates
Limit block (I>> threshold).
Computation block (Max phase current)
Threshold setting (e.g. pickup
I>>) .
The value is available for reading and is adjustable by means ThySetter + MMI.
Switch
ON delay timer with reset (tON delay)
ON delay timer without reset (tON delay)
OFF delay timer (dropout) without reset (tDROP delay)
Curve type (definite/inverse time)
0T
IL3
Max[IL1 ,IL2 ,IL3 ]
IL2
IL1
tON tON tON tON
t
RESET
INPUT
OUTPUT
tDROP
tON tON
t
INPUT
OUTPUT
tON tON tON
t
INPUT
OUTPUT
0T
tON
& &
≥1≥1
EXOR logic gate
tDROP
=1
I >>
II ≥
I>>
tON
RESET
0T
0 T

INTRODUCTION 9
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Symbols1 .ai
tON tON tON
t
RESET
INPUT
OUTPUT
tDROP
tDROP
tDROP tDROP
Minimum pulse width operation for output relays (tTR )
tTR
t
tTR
INPUT
OUTPUT
tTR
0 T
tTR
t
tTR
INPUT
OUTPUT
Latched operating mode for output relays and LEDs
Pulse operating mode for output relays
t
INPUT
OUTPUT
Latched
tTR
T0
RESET
OFF delay timer (dropout) with reset (tDROP delay)

GENERAL 10
NA011 - Manual - 05 - 2022
2 GENERAL2 GENERAL
Preface
The relay type NA011 can be used in radial networks as feeder or power transformer protection.
In solidly grounded systems the residual overcurrent protection can be used on feeders of any length,
while in ungrounded or Petersen coil and/or resistance grounded systems, the residual overcurrent
protection can be used on feeders of small length in order to avoid unwanted trippings due to the
capacitive current contribution of the feeder on external ground fault.
Beside to the phase and residual overcurrent protections, the automatic reclosing function is pro-
vided.
The NA011 protection relay may be shipped with traditional CTs or low power (LPCT) current inputs;
for both versions, the residual overcurrent protection can use the measured (CTs or balanced trans-
former) or the calculated residual current.
Following input circuits are available:
Phase current inputs
Traditional CTs
• Three phase current inputs with secondary nominal currents independently selectable at 1 A or 5 A
through DIP-switches.
Low power CTs
• Three phase current inputs with primary nominal currents independently selectable through
DIP-switches and software.
Residual current input
Measured residual current
• One residual current input with secondary nominal current selectable at 1 A or 5 A through DIP-
switches.
Calculated residual current
• Residual current is calculated by the vector sum of the three phase currents, measured by three
1 A or 5 A CTs or by three LPCT type sensors.
Setting, programming and reading operations must be effected by means of Personal Computer with
ThyVisor software or by means of remote communication interface (RS485 bus); all operations must
be performed through MMI.
The NA011 hardware case is suitable for flash and rack mounting
Photo

GENERAL 11
NA011 - Manual - 05 - 2022
Main features
• Metallic case.
• Backlight LCD 2x16 Display.
• Eight LEDs that may be joined with matrix criteria to many and various functions.
• RESET key to clear LED indications and latched output relays.
• Three binary inputs.
• Independently settable for start, trip, self-test and control four output relay (K1...K4) Each output
relay may be set with normally energized or normally de-energized operating mode and manual or
automatic reset (latched/no-latched).
• Rear RS485 port, with ModBus protocol.
• RS232 front serial port (local communication for ThyVisor).
• Real time clock with super capacitor backup.
The most significant constructive features are:
• Galvanically insulated input and output circuits (communication and binary circuits included).
• Fast sampling rate for inputs.
• Optimum filtering of input signals through combined use of analog and digital filters.
• Traditional electromechanical-type final output contacts with continuous monitoring of control coil
continuity.
• Auxiliary supply comprising a switching-type voltage stabilizing circuit having a very wide working
range and a very small power dissipation
The most significant operating features are:
• Programming of operating modes and parameters by means of the front keys and alphanumeric
display, with a programming procedure based on carrying out guided selections and on explicit and
immediate signalling of the operations being performed, so that such procedure can be carried out
without coding tables or mnemonic informations.
• The feature modification operations do not interrupt the normal functions of the relay.
• Impossibility of programming unacceptable parameter values, thanks to the automatic limitation of
top and bottom scale values for the relative setting ranges.
• Currents are sampled 64 times per period and measured in the effective value (RMS) of the funda-
mental component using the DFT (Discrete Fourier Transform) algorithm and digital filters.
• The fault recorder (SFR) runs continuously capturing in circular mode the last twenty events upon
trigger of binary input/output and/or element pickup (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).

TECHNICAL DATA 12
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3 TECHNICAL DATA3 TECHNICAL DATA
3.1 GENERAL
Mechanical data
Mounting Flush, Rack
External dimensions 177 x 107 x 105 (high x width x depth)
Terminals screw connection
Mass 1.2 kg
Reference standards EN 60529, EN 60529/A1
• Degrees of protection provided by enclosures (IP Code)
• Front IP52
• Terminals IP20
Insulation
Reference standards EN 60255-5 IEC 60255-5
High voltage test (50 Hz 60 s)
• Auxiliary power supply 2 kV
• Input circuits 2 kV
• Output circuits 2 kV
• Output circuits (between open contacts) 1 kV
• Communication interfaces 500 V
Impulse voltage withstand test (1.2/50 ms):
• Auxiliary power supply 5 kV
• Input circuits 5 kV
• Output circuits 5 kV
• Output circuits (between open contacts) 2.5 kV
Insulation resistance >100 MW
EMC tests for interference immunity
Reference standards
• Product standard for measuring relays EN 50263
• Generic standards immunity for industrial environments EN 61000-6-2
• Electromagnetic compatibility requirements for measuring relays and protection equipment
EN 60255-26
• Apparati di automazione e controllo per centrali e stazioni elettriche
• Compatibilità elettromagnetica - Immunità ENEL REMC 02
• Normativa di compatibilità elettromeccanica per apparati e sistemi
ENEL REMC 01
Voltage dip and interruption
Reference standards EN 61000-4-29
IEC 60255-22-11
Voltage dips, short interruptions and voltage variations on dc input power port immunity tests
Auxiliary power supply in dc energizing quantity
• Interruption (UT=40%) 100 ms
• Interruption (UT=0%) 50 ms
• Voltage variations (UT=80...120%) 10 s
EMC tests for interference immunity
Reference standards EN 60255-22-1 IEC 60255-22-1
EN 61000-4-12 EN 61000-4-12
Damped oscillatory wave
• 0.1 MHz and 1 MHz common mode 2.5 kV
• 0.1 MHz and 1 MHz differential mode 1.0 kV
• Ring wave common mode 2.0 kV
• Ring wave differential mode 1.0 kV
Reference standards EN 60255-22-2 IEC 60255-22-2
EN 61000-4-2 IEC 61000-4-2
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
• 900 MHz Pulse modulated 10 V/m

TECHNICAL DATA 13
NA011 - Manual - 05 - 2022
Reference standards EN 60255-22-4 IEC 60255-22-4
EN 61000-4-4 IEC 61000-4-4
Fast transient burst (5/50 ns)
• Auxiliary power supply 2 kV
• Input circuits 4 kV
Reference standards EN 60255-22-5 IEC 60255-22-5
EN 61000-4-5 IEC 61000-4-5
High energy pulse
• Uaux (line-to-ground 10 ohm, 9 mF) 2 kV
• Uaux (line-to-line 0 ohm, 18 mF) 1 kV
• I/O ports (line-to-ground 40 ohm, 0.5 mF) 2 kV
• I/O ports (line-to-line 40 ohm, 0.5 mF) 1 kV
Reference standards EN 60255-22-6 IEC 60255-22-6
EN 61000-4-6 IEC 61000-4-6
Conducted radio-frequency fields
• 0.15...80 MHz AM 80% 1kHz 10 V
Reference standards EN 60255-22-7 IEC 60255-22-7
EN 61000-4-16 IEC 61000-4-16
Power frequency immunity tests
• Dc voltage 30 V
• 50 Hz continuously 30 V
• 50 Hz 1 s 300 V
• 0.015...150 kHz 30 V
Reference standards EN 61000-4-8 IEC 61000-4-8
Magnetic field 50 Hz
• 50 Hz continuously 100 A/m
• 50 Hz 1 s 1 kA/m
Reference standards EN 61000-4-10 IEC 61000-4-10
Damped oscillatory magnetic field
• Damped oscillatory wave 0.1 MHz 30 A/m
• Damped oscillatory wave 1 MHz 30 A/m
Emission
Reference standards EN 60255-25 IEC 60255-25
EN 61000-6-4 IEC 61000-6-4
EN 55011 CISPR 11
Electromagnetic emission tests
• Conducted emission auxiliary power supply 0.15...0.5 MHz 79 dB mV
• Conducted emission auxiliary power supply 0.5...30 MHz 73 dB mV
• Radiated emission 30...230 MHz 40 dB mV/m
• Radiated emission 230...1000 MHz 47 dB mV/m
Mechanical tests
Reference standards EN 60255-21-1 EN 60255-21-2 RMEC01
Vibration, shock, bump and seismic tests on measuring relays and protection equipment
• EN 60255-21-1 Vibration tests (sinusoidal) Class 1
• EN 60255-21-2 Shock and bump test Class 1
Climatic tests
Reference standards IEC 60068-x ENEL R CLI 01 CEI 50
Operating temperature -25...+70 °C
Storage temperature -40...+85 °C
Permissible relative humidity 10...95 %
Atmospheric pressure 70...110 kPa
Safety
Reference standards EN 61010-1
Safety requirements for electrical equipment for measurement, control and laboratory use
Pollution degree 3
Reference voltage 250 V
Overvoltage category III
Certifications
Reference standards
Product standard for measuring relays EN 50263
CE Conformity
• EMC Directive 2014/30/EU
• Low Voltage Directive 2014/35/EU
• Type tests IEC 60255-6

TECHNICAL DATA 14
NA011 - Manual - 05 - 2022
3.2 INPUT CIRCUITS
Auxiliary power supply U
aux
Voltage
Nominal value (range)[1] 24...230 V~/-
Operative range 19...265 V~/19...300 V-
Inrush current (max)
• 24 V- 3 A, 1 ms
• 48 V- 5 A, 1 ms
• 110 V- 10 A, 1 ms
• 230 V~ 40 A, 1 ms
Frequency (for alternate voltage supply) 45...66 Hz
Max distortion factor ( for alternating voltage supply) 15%
Max alternating component (for dc voltage supply):
• Full wave rectified sine wave (Sine wave) 100 % (80 %)
Power consumption:
• Maximum (energized relays, three LEDs, backlight ON) 4.5 W (UAUX = 24 V-)
• Maximum (energized relays, three LEDs, backlight ON) 9 VA (UAUX = 230 V~)
Phase current input circuits
Standard CTs:
Connections M4 terminals
Relay nominal phase current In1 A or 5 A selectable by DIP-switch
Permanent overload 25 A
Thermal overload (1 s) 500 A
Dynamic overload (half cycle) 1250 A
Rated consumption (for any phase) ≤0.002 VA (In=1 A), ≤0.04 VA (In=1 A)
LPCT - Low Power Current Transformers:
Connections RJ45 plug
Relay nominal phase current In100 A
Extended primary current 50 A...1250 A selectable by DIP-switch
Max primary current 12.5 kA
Nominal secondary voltage (with Inp = 100 A) 22.5 mV
Residual current input circuit[2]
Relay nominal residual current IEn 1 A or 5 A selectable by DIP-switch
Permanent overload 25 A
Thermal overload (1 s) 500 A
Dynamic overload (half cycle) 1250 A
Rated consumption ≤0.006 VA (IEn=1 A), ≤0.12 VA (IEn=5 A)
Binary input circuits
Quantity 3
Type optocoupler
Operative range 24...265 V~/-
Min activation voltage UDIGmin 18 V
Max consumption, energized 3 mA
Funzioni selezionabili:
• IN1 None, 52b, Trip EXT[3]
• IN2 None, 52a, Trip EXT, CB Open
• IN3 None, 79 Enable, 79 Remote[4], Trip EXT, CB Close
3.3 OUTPUT CIRCUITS
Output relays
Quantity 4
Type of contacts changeover (SPDT, type C)
Nominal current 8 A
Nominal voltage/max switching voltage 250 V~/400 V~
Breaking capacity:
• Direct current (L/R = 40 ms) 50 W (K1, K2, K4 trip)
• Direct current (L/R = 40 ms) 30 W (K3 signalling)
• Alternating current (l= 0,4) 1250 VA
Make 1000 W/VA
Short duration current (0,5 s) 30 A
Minimum switching load 300 mW (5 V/ 5 mA)
Mechanical life (Electrical life) 106operations (105operations)
Minimum pulse width (K1tTR...K4tTR) 0.01...0.50 s (step 0.01 s)
Note 1 The different versions must be select on order
Note 2 The residual current input is available on NA011#xxx2 and NA011#xxx3 versions
Note 3 - With “Trip-EXT” setting the selected relay (K1 ... K4) is driven when the binary input is powered
Note 4 - With “79 Remote” setting the reclosing sequence starts, when the binary input is powered (trigger from external protective device)

TECHNICAL DATA 15
NA011 - Manual - 05 - 2022
3.4 MMI
Display 16x2 LCD backlight module
LEDs
Quantity 8
• ON/fail (green) 1
• Start (yellow) 1
• Trip (red) 1
• Trip I>, I>>, I>>> (red) 1
• Trip IE>, IE>> (red) 1
• 52a - Circuit Breaker closed (red) 1
• 52b - Circuit Breaker open (red) 1
• 79 - Automatic reclosure (red) 1
Keyboard 8 keys
3.5 COMMUNICATION INTERFACES
Local port
Connection RJ10
Baud rate 19200 bps
Parity None
Protocol Modbus RTU®
Remote ports
RS485
• Connection screw terminals
• Baud rate 1200...57600 bps
• Protocol ModBus®RTU
IEC 60870-5-103
3.6 GENERAL SETTINGS
Relay nominal frequency fn50, 60 Hz
Phase CT primary nominal current Inp [1] 1 A...5000 A
1...99 A (step 1 A)
100...5000 A (step 5 A)
Residual CT primary nominal current IEnp [2] 1 A...1000 A
1...99 A (step 1 A)
100...5000 A (step 5 A)
3.7 PROTECTIVE ELEMENTS
Phase overcurrent - 50/51
I> Element
I> Curve type (I>Curve)DEFINITE,
IEC/BS A, B, C,
ANSI/IEEEE MI, VI, EI, I2T
CLP Activation time (tCLP>) 0.00...100.0 s
0.00...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
I> Reset time delay (t>RES)0.00...100.0 s
0.00...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
Definite time
50/51 First threshold definite time (I>def) 0.100...20.0 In
0.100...0.999 In (step 0.001 In)
1.00...9.99 In (step 0.01 In)
10.0...20.0 In (step 0.1 In)
I>def within CLP (ICLP>def) 0.100...20.0 In
0.100...0.999 In (step 0.001 In)
1.00...9.99 In (step 0.01 In)
10.0...20.0 In (step 0.1 In)I>def
I>def Operating time (t>def) 0.03...10.00 s (step 0.01 s)
Note 1 The rated phase current settings doesn’t concern the 50/51 protection elements; they must agree with nominal primary current for traditional CT
inputs or dip-switch 50...1250 A for LPCT inputs for a right reading of the phase current primary values (Reading Direct).
Note 2 The rated residual current settings doesn’t concern the 50N/51N protection elements; they must agree with nominal primary current of the CT
inputs for a right reading of the residual current primary values (Reading Direct).
For the NA011#xxx0 and NA011#xxx1 versions (no residual current input circuit), the parameter is meaningless

TECHNICAL DATA 16
NA011 - Manual - 05 - 2022
Inverse time[1]
50/51 First threshold inverse time (I>inv) 0.100...2.50 In
0.100...0.999 In (step 0.001 In)
1.00...2.50 In (step 0.01 In)
I>inv within CLP (ICLP>inv) 0.100...10.00 In
0.100...0.999 In (step 0.001 In)
1.00...10.00 In (step 0.01 In)I>inv
I>inv Operating time (t>inv) 0.02...60.0 s
0.02...9.99 s (step 0.01 s)
10.0...60.0 s (step 0.1 s)
I>> Element
CLP Activation time (tCLP>>def) 0.00...100.0 s
0.00...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
I>> Reset time delay (t>>RES)0.00...100.0 s
0.00...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
Definite time
50/51 Second threshold definite time (I>>def) 0.100...20.0 In
0.100...0.999 In (step 0.001 In)
1.00...9.99 In (step 0.01 In)
10.0...20.0 In (step 0.1 In)
I>>def within CLP (ICLP>def) 0.100...20.0 In
0.100...0.999 In (step 0.001 In)
1.00...9.99 In (step 0.01 In)
I>>def Operating time (t>>def) 0.03...10.00 s (step 0.01 s)
I>>> Element
CLP Activation time (tCLP>>>def) 0.00...100.0 s
0.00...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
I>>> Reset time delay (t>>>RES)0.00...100.0 s
0.00...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
Definite time
50/51 Third threshold definite time (I>>>def) 0.100...20.0 In
0.100...0.999 In (step 0.001 In)
1.00...9.99 In (step 0.01 In)
10.0...20.0 In (step 0.1 In)
I>>>def Operating time (t>>>def) 0.03...10.00 s (step 0.01 s)
Pickup time ≤ 0.03 s
Dropout ratio 0.95...0.98
Dropout time ≤ 0.04 s
Overshoot time 0.03 s
Pickup accuracy ± 4% ± 1% In
Operate time accuracy 5% or ± 10 ms
Note 1
Standard Inverse Time (IEC 255-3/BS142 type A or SIT): t = 0.14 · t>inv / [(I/I>inv)0.02 - 1]
Very Inverse Time (IEC 255-3/BS142 type B or VIT): t = 13.5 · t>inv / [(I/I>inv) - 1]
Extremely Inverse Time (IEC 255-3/BS142 type C or EIT): t = 80 · t>inv / [(I/I>inv)2 - 1]
Moderately Inverse (ANSI/IEEE type MI): t = t>inv · {0.01 / [(I/I>inv)0.02 - 1] + 0.023}
Very Inverse (ANSI/IEEE type VI): t = t>inv · {3.922 / [(I/I>inv)2- 1] + 0.098}
Extremely Inverse (ANSI/IEEE type EI): t = t>inv · {5.64 / [(I/I>inv)2- 1] + 0.024}
I-squared-t (I 2t = K): t = 16 · t>inv / (I/I>inv)2
where:
t:operate time
I>inv:pickup value
t>inv:operate time setting
Asymptotic reference value: 1.1 I>inv
Minimum operate time: 0.1 s
Equation is valid for 1.1 ≤ I/I>inv ≤ 20
With I>inv pickup ≥ 2.5 In, the upper limit is 50 In

TECHNICAL DATA 17
NA011 - Manual - 05 - 2022
Residual overcurrent - 50N/51N
IE> Element
IE> Curve type (IE>Curve)DEFINITE, IEC/BS A, B, C,
ANSI/IEEE MI, VI, EI, I2T
CLP Activation time (tECLP>) 0.00...100.0 s
0.00...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
IE> Reset time delay (tE>RES)0.00...100.0 s
0.00...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
Definite time
50N/51N First threshold definite time (IE>def) 0.005...5.00 IEn
0.005...0.999 IEn (step 0.001 IEn)
1.00...5.00 IEn (step 0.01 IEn)
IE>def within CLP (IECLP>def) 0.005...5.00 IEn
0.005...0.999 IEn (step 0.001 IEn)
1.00...5.00 IEn (step 0.01 IEn)
IE>def Operating time (tE>def) 0.03...10.00 s (step 0.01 s)
Inverse time[1]
50N/51N First threshold inverse time (IE>inv) 0.005...2.00 IEn
0.005...0.999 IEn (step 0.001 IEn)
1.00...2.00 IEn (step 0.01 IEn)
IE>inv Operating time (tE>inv) 0.02...60.0 s
0.02...9.99 s (step 0.01 s)
10.0...60.0 s (step 0.1 s)
IE>> Element
IE>> Curve type (IE>>Curve)DEFINITE, IEC/BS A, B, C,
ANSI/IEEE MI, VI, EI, I2T
CLP Activation time (tECLP>>) 0.00...100.0 s
0.00...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
IE>> Reset time delay (tE>>RES)0.00...100.0 s
0.00...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
Definite time
50N/51N Second threshold definite time (IE>>def) 0.005...5.00 IEn
0.005...0.999 IEn (step 0.001 IEn)
1.00...5.00 IEn (step 0.01 IEn)
IE>>def within CLP (IECLP>>def) 0.005...5.00 IEn
0.005...0.999 IEn (step 0.001 IEn)
1.00...5.00 IEn (step 0.01 IEn)
IE>>def Operating time (tE>>def) 0.03...10.00 s (step 0.01 s)
Note 1
Standard Inverse Time (IEC 255-3/BS142 type A or SIT): t = 0.14 · tE>inv / [(IE/ IE>inv)0.02 - 1]
Very Inverse Time (IEC 255-3/BS142 type B or VIT): t = 13.5 · tE>inv / [(IE/IE>inv) - 1]
Extremely Inverse Time (IEC 255-3/BS142 type C or EIT): t = 80 · tE>inv / [(IE/IE>inv)2 - 1]
Moderately Inverse (ANSI/IEEE type MI): t = tE>inv · {0.01 / [(IE/IE>inv)0.02 - 1] + 0.023}
Very Inverse (ANSI/IEEE type VI): t = tE>inv · {3.922 / [(IE/IE>inv)2- 1] + 0.098}
Extremely Inverse (ANSI/IEEE type EI): t = tE>inv · {5.64 / [(IE/IE>inv)2- 1] + 0.024}
I-squared-t (I 2t = K): t = 16 · tE>inv / (I/IE>inv)2
where:
IE:residual current input
t:operate time
IE>inv:pickup value
tE>inv:operate time setting
Asymptotic reference value: 1.1 IE>
Minimum operate time: 0.1 s
Equation is valid for 1.1 ≤ IE/ IE>inv ≤ 20

TECHNICAL DATA 18
NA011 - Manual - 05 - 2022
Inverse time[1]
50N/51N First threshold inverse time (IE>inv) 0.005...2.00 IEn
0.005...0.999 IEn (step 0.001 IEn)
1.00...2.00 IEn (step 0.01 IEn)
IE>inv Operating time (tE>inv) 0.02...60.0 s
0.02...9.99 s (step 0.01 s)
10.0...60.0 s (step 0.1 s)
Pickup time ≤ 0.03 s
Dropout ratio 0.95...0.98
Dropout time ≤ 0.04 s
Overshoot time 0.03 s
Pickup accuracy ± 4% ± 1% IEn
Operate time accuracy 5% or ± 10 ms
Breaker Failure
BF Time delay (tBF) 0.10...10.00 s
0.10...0.99 s (step 0.01 s)
1.00...10.00 s (step 0.05 s)
1.0...0.99 s (step 0.01 s)
Operate time accuracy 5% or ± 10 ms
Note 1
Standard Inverse Time (IEC 255-3/BS142 type A or SIT): t = 0.14 · tE>>inv / [(IE/ IE>>inv)0.02 - 1]
Very Inverse Time (IEC 255-3/BS142 type B or VIT): t = 13.5 · tE>>inv / [(IE/IE>>inv) - 1]
Extremely Inverse Time (IEC 255-3/BS142 type C or EIT): t = 80 · tE>>inv / [(IE/IE>>inv)2 - 1]
Moderately Inverse (ANSI/IEEE type MI): t = tE>>inv · {0.01 / [(IE/IE>>inv)0.02 - 1] + 0.023}
Very Inverse (ANSI/IEEE type VI): t = tE>>inv · {3.922 / [(IE/IE>>inv)2- 1] + 0.098}
Extremely Inverse (ANSI/IEEE type EI): t = tE>>inv · {5.64 / [(IE/IE>>inv)2- 1] + 0.024}
I-squared-t (I 2t = K): t = 16 · tE>>inv / (I/IE>>inv)2
where:
IE:residual current input
t:operate time
IE>>inv:pickup value
tE>>inv:operate time setting
Asymptotic reference value: 1.1 IE>>
Minimum operate time: 0.1 s
Equation is valid for 1.1 ≤ IE/ IE>>inv ≤ 20

TECHNICAL DATA 19
NA011 - Manual - 05 - 2022
3.8 CONTROL AND MONITORING
Automatic reclose (79)
79 Function mode 79 Mode Rapid - Rapid+Slow
Number of delayed reclosures N.DAR 0...5
Rapid reclosure dead time trdt 0.1...60 s
0.0...19.9 s step 0.1 s,
20..60 s step 1 s
Slow reclosure dead time tsdt 1...200 s (step 1 s)
Reclaim time tr1...200 s (step 1 s)
Slow reclosure fault discrimination time td1...10 s (step 1 s)
Circuit Breaker monitoring
Circuit breaker diagnostic
Diagnostic (CB check) 52a/52b - 52a - 52b
Oscillography (DFR)
Format COMTRADE
Number of records 2
Recording mode circular
Sampling rate 16 samples / power cycle
Set trigger:
• Pre-trigger time 0...63 T[1] [2]
• Trigger inputs IN1, IN2, IN3
• Triggeroutputs K1...K4
• Manual Trigger ThyVisor
• General Trigger general from start / trips Start, Trip
• Trigger from start / trips Start I>, I>>, ...Trip I>...
Set analog channels:
Analog 1...Analog 4
• Instantaneous currents value iL1, iL2, iL3, iE
• Phase currents IL1, IL2, IL3
• Residual current IE
Set digital channels:
• Inputs IN1, IN2, IN3
• Outputs K1...K4
• General trigger from start / trip General Start, General Trip
3.9 MEASURES
Currents
RMS value of the fundamental component for phase currents (IL1, IL2, IL3)
RMS value of the fundamental component for residual current (IE)
Digital inputs
IN1 None, 52b, Trip EXT[2]
IN2 None, 52a, Trip EXT, T, CB Open
IN3 None, 79 Enable, 79 Remote[3], Trip EXT, T, CB Close
Automatic Reclose
79 Active Mode On - Off
79 Cycle State Reset - On - Off
79 Run On - Off
79 Residual time
79 Last event
Circuit Breaker
Position Open - Closed - Unknown
Note 1 - T = number of power cycles
Example, with setting T=4 the pre-trigger is 80 ms with f = 50 Hz
Note 2 - With “Trip-EXT” programming, when the binary input is activated the selected output relay (K1 ... K4) is driven
Note 3 -With “79 Remote” programming, when the binary input is activated the reclosing cycle is started (trigger from external protective device)

FUNCTION CHARACTERISTICS 20
NA011 - Manual - 05 - 2022
4 FUNCTION CHARACTERISTICS4 FUNCTION CHARACTERISTICS
4.1 HARDWARE DESCRIPTION
The following figure illustrates the basic structure of the relay.
Printed boards hold the circuit components arranged according to a modular allocation of the main
functions.
Power supply board
All the components necessary for conversion and stabilization functions are provided.
Input range: 24...230 V.
The circuit provides stabilized voltages of +5 V and -5 V, required for the analogue measurement and
+3.3 V for supplying the digital circuits.
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).
hw.ai
RTC
CPU BOARD
POWER SUPPLY BOARD
INPUT MODULE
CTs
DSP
1A/5A
≈
≈
≈
≈
EEprom
RS485
RELAYS
K1...K4 Output contacts
RS232
MMI
LCD
LEDs
BINARY INPUTS
IN1
Input
IN2
IN3
POWER SUPPLY
+5 V +10 V 0 V +24 V -10 V POWER FAIL RESET
Uaux
≈
≈
≈
LPCTs CURRENT INPUTS
IL1
IL2
IL3
L1
L2
SettingLPCT
800 A
400 A
200 A
100 A
50 A
L3
In=50...1250A