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NA11 - Manual - 02 - 2009

MANUAL

NA11

PHASE & RESIDUAL OVERCURRENT

PROTECTION RELAY,

AUTOMATIC RECLOSING

2NA11 - Manual - 02 - 2009

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..................................................................................................................................................................................................14

3.2 INPUT CIRCUITS ...............................................................................................................................................................................................14

Auxiliary power supply

aux .......................................................................................................................................................................14

Phase current input circuits........................................................................................................................................................................14

Residual current input circuit......................................................................................................................................................................14

Binary input circuits......................................................................................................................................................................................14

Block input (logic selectivity) ......................................................................................................................................................................14

3.3 OUTPUT CIRCUITS............................................................................................................................................................................................15

Output relays..................................................................................................................................................................................................15

Block output (Logic selectivity)...................................................................................................................................................................15

3.4 MMI.....................................................................................................................................................................................................................15

3.5 COMMUNICATION INTERFACES ...................................................................................................................................................................15

Local port........................................................................................................................................................................................................15

Remote ports..................................................................................................................................................................................................15

3.6 GENERAL SETTINGS ........................................................................................................................................................................................16

3.7 PROTECTIVE ELEMENTS .................................................................................................................................................................................16

Thermal protection with Pt100 probes - 26 ...............................................................................................................................................16

Phase overcurrent - 50/51 - settings for 1/5 A standard CTs version ...................................................................................................16

Phase overcurrent - 50/51 - settings for low power CTs version (LPCT) .............................................................................................17

Residual overcurrent - 50N/51N - settings for 1/5 A standard CTs version........................................................................................ 19

Breaker Failure - BF..................................................................................................................................................................................... 20

Residual overcurrent - 50N/51N - settings for low power CTs version (LPCT) ................................................................................. 20

Breaker failure - BF.......................................................................................................................................................................................22

3.8 CONTROL AND MONITORING....................................................................................................................................................................... 23

Second harmonic restraint - 2ndh-REST.................................................................................................................................................. 23

Trip Circuit Supervision - 74TCS................................................................................................................................................................. 23

Selective block - BLOCK2 ........................................................................................................................................................................... 23

Circuit Breaker monitoring ......................................................................................................................................................................... 23

CT supervision - 74CT .................................................................................................................................................................................. 23

Pilot wire diagnostic .................................................................................................................................................................................... 23

Demand measures ....................................................................................................................................................................................... 23

Oscillography (DFR) ......................................................................................................................................................................................24

PLC (Programmable Logic Controller) .......................................................................................................................................................24

3.9 MEASURES ........................................................................................................................................................................................................25

NA11 - Manual - 02 - 2009

4 FUNCTION CHARACTERISTICS 26

4.1 HARDWARE DESCRIPTION.............................................................................................................................................................................26

Power supply board......................................................................................................................................................................................27

CPU board.......................................................................................................................................................................................................27

Input board .....................................................................................................................................................................................................27

MMI (keyboard, LED and display) ..............................................................................................................................................................27

4.2 SOFTWARE DESCRIPTION ............................................................................................................................................................................. 28

Base software............................................................................................................................................................................................... 28

Real-time operating system........................................................................................................................................................................ 28

Task................................................................................................................................................................................................................. 28

Drivers............................................................................................................................................................................................................ 29

Application Software ................................................................................................................................................................................... 29

Data Base ...................................................................................................................................................................................................... 29

Self test (Application) .................................................................................................................................................................................. 29

Development tools (Builder)....................................................................................................................................................................... 29

4.3 I/O DESCRIPTION............................................................................................................................................................................................. 30

Metering inputs ............................................................................................................................................................................................ 30

Signal processing......................................................................................................................................................................................... 30

Conventions................................................................................................................................................................................................... 33

Use of measured values...............................................................................................................................................................................34

Binary inputs ..................................................................................................................................................................................................35

LED indicators................................................................................................................................................................................................42

Communication interfaces...........................................................................................................................................................................44

4.4 PROTECTIVE ELEMENTS .................................................................................................................................................................................45

Rated values...................................................................................................................................................................................................45

Thermal protection with RTD thermometric probes (26) ........................................................................................................................47

Phase overcurrent - 50/51........................................................................................................................................................................... 49

Residual overcurrent - 50N/51N ................................................................................................................................................................ 59

4.5 CONTROL AND MONITORING........................................................................................................................................................................71

Automatic reclosure (79)..............................................................................................................................................................................71

Logical block - BLOCK1 ................................................................................................................................................................................75

Selective block -BLOCK2 .............................................................................................................................................................................77

Remote tripping .............................................................................................................................................................................................81

Frequency tracking.......................................................................................................................................................................................82

Second Harmonic Restraint - 2ndh-REST ................................................................................................................................................ 83

Cold Load Pickup - CLP ................................................................................................................................................................................84

Trip circuit supervision - 74TCS...................................................................................................................................................................86

Circuit breaker supervision ........................................................................................................................................................................ 89

Oscillography ................................................................................................................................................................................................91

5 MEASURES, LOGIC STATES AND COUNTERS 92

Measures........................................................................................................................................................................................................92

Protection .......................................................................................................................................................................................................92

Delayed inputs ...............................................................................................................................................................................................92

Internal states................................................................................................................................................................................................92

Relays............................................................................................................................................................................................................. 93

Counters......................................................................................................................................................................................................... 93

Self test .......................................................................................................................................................................................................... 93

Selective Block - Block2 ..............................................................................................................................................................................94

Fault recording - SFR....................................................................................................................................................................................94

Event recording - SER...................................................................................................................................................................................94

Oscillography - DFR ......................................................................................................................................................................................94

6 INSTALLATION 97

6.1 PACKAGING .......................................................................................................................................................................................................97

6.2 MOUNTING........................................................................................................................................................................................................97

6.3 ELECTRICAL CONNECTIONS ........................................................................................................................................................................101

6.4 NOMINAL CURRENT InAND IEn SETTING FOR TRADITIONAL CTs ......................................................................................................112

6.5 LED ALLOCATION............................................................................................................................................................................................116

6.6 FINAL OPERATIONS .......................................................................................................................................................................................116

4NA11 - Manual - 02 - 2009

7 PROGRAMMING AND SETTINGS 117

7.1 SW ThySetter...................................................................................................................................................................................................117

ThySetter installation..................................................................................................................................................................................117

ThySetter use ...............................................................................................................................................................................................117

7.2 MMI (Man Machine Interface) ................................................................................................................................................................... 118

Reading variables (READ)......................................................................................................................................................................... 118

Setting modifying (SET) ............................................................................................................................................................................. 119

TEST.............................................................................................................................................................................................................. 120

COMMUNICATION..................................................................................................................................................................................... 120

Circuit breaker commands ....................................................................................................................................................................... 120

7.3 MENU TREE......................................................................................................................................................................................................121

7.4 MAINTENANCE...............................................................................................................................................................................................126

7.5 REPAIR ..............................................................................................................................................................................................................126

7.6 PACKAGING.....................................................................................................................................................................................................126

8 APPENDIX 127

8.1 APPENDIX A1 - Inverse time IEC curves ...................................................................................................................................................127

Mathematical formula ................................................................................................................................................................................127

Phase overcurrent 50/51 - Standard inverse time curve (IEC 60255-3/BS142 type A)................................................................... 128

Phase overcurrent 50/51 - Very inverse time curve (IEC 60255-3/BS142 type B) ........................................................................... 129

Phase overcurrent 50/51 - Extremely inverse time curve (IEC 60255-3/BS142 type C).................................................................. 130

Residual overcurrent 50N/51N - Standard inverse time curve (IEC 60255-3/BS142 type A) .........................................................131

Residual overcurrent 50N/51N - Very inverse time curve (IEC 60255-3/BS142 type B)..................................................................132

Residual overcurrent 50N/51N - Extremely inverse time curve (IEC 60255-3/BS142 type C) ....................................................... 133

8.2 APPENDIX A2 - Inverse time ANSI/IEEE curves .......................................................................................................................................134

Phase overcurrent 50/51 - Moderately inverse time curve (ANSI/IEEE type MI)............................................................................135

Phase overcurrent 50/51 - Very inverse time curve (ANSI/IEEE type VI) .........................................................................................136

Phase overcurrent 50/51 - Extremely inverse time curve (ANSI/IEEE type EI)................................................................................137

Residual overcurrent 50N/51N - Moderately inverse time curve (ANSI/IEEE type MI) ................................................................ 138

Residual overcurrent 50N/51N - Very inverse time curve (ANSI/IEEE type VI) .............................................................................. 139

Residual overcurrent 50N/51N - Extremely inverse time curve (ANSI/IEEE type EI)..................................................................... 140

8.3 APPENDIX A3 - Inverse time - RECTIFIER, I2t and EM curves ................................................................................................................141

Phase overcurrent 50/51 - Rectifier curves ............................................................................................................................................142

Phase overcurrent 50/51 - I2t inverse curves (I2t=K) ........................................................................................................................... 143

Phase overcurrent 50/51 - Electromechanical inverse curves (EM)..................................................................................................144

Residual overcurrent 50N/51N - Electromechanical inverse curves (EM)........................................................................................145

8.4 APPENDIX B1 - I/O Diagram .........................................................................................................................................................................146

8.5 APPENDIX B2 - Interfaces ............................................................................................................................................................................147

8.6 APPENDIX B3 - Connection diagrams ....................................................................................................................................................... 148

8.7 APPENDIX C - Dimensions............................................................................................................................................................................152

8.8 APPENDIX D - Setting table......................................................................................................................................................................... 153

8.9 APPENDIX E - Revisions history...................................................................................................................................................................187

8.10 APPENDIX F - EC Declaration of conformity............................................................................................................................................. 188

NA11 - Manual - 02 - 2009INTRODUCTION

1 INTRODUCTION

Scope and liability

This document describes the functions, the technical data of NA11 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 NA11 devices with ﬁrmware version 1.60 and following.

Revision history is listed in appendix.

Conformity

The product complies with the CEE directives:

EMC Council Directives: 89/336/EEC

Low voltage Directives: 73/23/EEC

Technical support

Contact: THYTRONIC Technical Service www.thytronic.it

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.

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.

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.

6NA11 - Manual - 02 - 2009 INTRODUCTION

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 NA11 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 ThySetter[1] menu:

Phase overcurrent -50/51

The parameter description (measures, thresholds, operate time,...) and related value:

First threshold 50/51 deﬁnite time

I>def

The display messages (MMI) are shown as:

NA11

Notes are highlighted with cursive letters inside colored bar

Note: Useful description note

Glossary/deﬁnitions

En Relay residual nominal current

Enp Residual CT primary nominal current

nRelay phase nominal current

np Phase CT primary nominal current

50/51 Phase overcurrent ANSI code

50N/51N Residual overcurrent ANSI code

74CT CT supervision

79 Automatic reclosing

52 or 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)

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

BF Breaker Failure

CT Current Transformer

Fw Firmware

K1...K6 Output relays

J2SE Java Platform Standard Edition

Pulse Output relay with pulse operation

Note 1 The graphic interface and the operation of the ThySetter software are described in the relative chapters

•

NA11#0A2MM00

In5A 1A 5A

UAUX 110-230 Vac/dc

IEn 5A 1A 5A

5NA11#0A2MM00

In5A 1A 5A

UAUX 110-230 Vac/dc

IEn 5A 1A 5A

NA11 - Manual - 02 - 2009INTRODUCTION

Log ﬁle A text ﬁle that lists actions that have occurred (ThySetter).

Latched Output relay with latched operation (manual reset) Output relay with

latched operation (automatic reset)

MMI (Man Machine Interface) Operator front panel

No-latched Output relay with no-latched operation (automatic reset)

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)

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 time interval between the instant when the characteris-

tic quantity in operate condition is changed, under speciﬁed condi-

tions, and the instant when the relay operates

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 Relay diagnostic

Start Leave an initial condition or reset condition

Subnet Mask (Ethernet nomenclature)

Sw Software

CT Current Transformer

TCS Trip Circuit Supervision

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

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.

ThySetter Setting and monitoring software

Trip Operation (with operate time)

tTR Output relay minimum pulse width

Upgrade Firmware upgrade

XML eXtensible Markup Language

8NA11 - Manual - 02 - 2009 INTRODUCTION

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 (ThySetter + communication interface)

Logic external signal (intput); may be a command coming from a binary input or a sw command

It is available for reading (ThySetter + 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)

IL3

Max[IL1 ,IL2 ,IL3 ]

IL2

IL1

tON tON tON tON

RESET

INPUT

OUTPUT

tDROP

tON tON

INPUT

OUTPUT

tON tON tON

INPUT

OUTPUT

tON

& &

≥1≥1

EXOR logic gate

tDROP

I>>

II ≥

I>>

tON

RESET

NA11 - Manual - 02 - 2009INTRODUCTION

Symbols1 .ai

tON tON tON

RESET

INPUT

OUTPUT

tDROP

tDROP tDROP

Minimum pulse width operation for output relays (tTR

)

tTR

INPUT

OUTPUT

tTR

INPUT

OUTPUT

Latched operating mode for output relays and LEDs

Pulse operating mode for output relays

INPUT

OUTPUT

Latched

tTR

RESET

OFF delay timer (dropout) with reset (tDROP delay)

10 NA11 - Manual - 02 - 2009 GENERAL

2 GENERAL

Preface

The relay type NA11 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.

Following input circuits are available:

Three phase current and one residual current inputs with nominal currents independently select-

able at 1 A or 5 A using DIP-switch.

Two binary inputs.

One block input (logic selectivity).

In addition to the main protection element, the breaker failure (BF), CT monitoring (74CT), Trip Circuit

Supervision (TCS), Programmable Logic Controller (PLC) and automatic reclosing function (79) are

also provided.

Setting, programming and reading operations must be effected by means of Personal Computer with

ThySetter software or by means of remote communication interface (RS485 bus and Ethernet net-

work); all operations must be performed through MMI.

According to the hardware conﬁgurations, the NA11 protection relay can be shipped in various case

styles depending on the required mounting options:

Flush.

Projecting mounting.

Rack.

With separate operator panel.

Other options are:

Auxiliary power supply operating range.

Communication protocols.

Photo

•

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