Thytronic NC20 Manuale utente

NC2 0 - Manual - 01 - 2 015

MANUAL

NC20

MULTIFUNCTION PROTECTION FOR

BANK CAPACITORS/HARMONIC FILTERS

WITH UNDER/OVERVOLTAGE ELEMENTS

NC2 0 - Manual - 01 - 2 015

TABLE OF CONTENTS

1 INTRODUCTION 5

Scope and liability...........................................................................................................................................................................................5

Applicability......................................................................................................................................................................................................5

Conformity ........................................................................................................................................................................................................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

Product standard for measuring relays.....................................................................................................................................................12

Mechanical data ...........................................................................................................................................................................................12

Insulation ........................................................................................................................................................................................................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 Uaux ......................................................................................................................................................................14

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

Unbalance neutral current input circuit....................................................................................................................................................14

Voltage input circuits....................................................................................................................................................................................14

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

3.3 OUTPUT CIRCUITS............................................................................................................................................................................................14

Relays..............................................................................................................................................................................................................14

Block output (Logic selectivity)...................................................................................................................................................................14

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

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

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

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

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

3.7 PROTECTIVE FUNCTIONS ...............................................................................................................................................................................16

Base current - IB...........................................................................................................................................................................................16

Discharge time - TD......................................................................................................................................................................................16

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

Undervoltage - 27..........................................................................................................................................................................................16

Undercurrent - 37..........................................................................................................................................................................................17

Phase unbalance - 46 ...................................................................................................................................................................................17

Neutral unbalance current - 46N................................................................................................................................................................17

Thermal image - 49....................................................................................................................................................................................... 18

RMS Phase overcurrent - 50/51................................................................................................................................................................. 19

Phase overcurrent - 50/51 Fundamental .................................................................................................................................................. 20

Residual overcurrent - 50N/51N ................................................................................................................................................................ 20

Overvoltage - 59.............................................................................................................................................................................................22

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

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

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

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

Circuit Breaker supervision........................................................................................................................................................................ 23

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

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

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

NC2 0 - Manual - 01 - 2 015

Oscillography (DFR) .................................................................................................................................................................................... 23

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

3.9 METERING..........................................................................................................................................................................................................24

Accuracy (type tests)....................................................................................................................................................................................24

Measures........................................................................................................................................................................................................24

4 FUNCTION CHARACTERISTICS 25

4.1 HARDWARE DESCRIPTION.............................................................................................................................................................................25

Power supply board......................................................................................................................................................................................26

CPU board.......................................................................................................................................................................................................26

Input board .....................................................................................................................................................................................................26

MMI (keyboard, LED and display) ..............................................................................................................................................................26

4.2 SOFTWARE DESCRIPTION ..............................................................................................................................................................................27

Base software................................................................................................................................................................................................27

Real-time operating system.........................................................................................................................................................................27

Task..................................................................................................................................................................................................................27

Drivers............................................................................................................................................................................................................ 28

Application Software................................................................................................................................................................................... 28

Data Base ...................................................................................................................................................................................................... 28

Self test (Application) .................................................................................................................................................................................. 28

Development tools (Builder)....................................................................................................................................................................... 28

4.3 I/O DESCRIPTION............................................................................................................................................................................................. 29

Metering inputs ............................................................................................................................................................................................ 29

Signal processing......................................................................................................................................................................................... 29

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

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

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

Output relays................................................................................................................................................................................................. 40

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

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

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

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

Thermal protection with RTD thermometric probes - 26 ....................................................................................................................... 48

TD Discharge time.........................................................................................................................................................................................56

Phase unbalance current - 46.....................................................................................................................................................................57

Neutral unbalance current - 46N............................................................................................................................................................... 63

Phase overcurrent - 50/51 RMS..................................................................................................................................................................82

Phase overcurrent - 50/51 Fundamental .................................................................................................................................................. 89

Residual overcurrent - 50N/51N .................................................................................................................................................................96

4.5 CONTROL AND MONITORING......................................................................................................................................................................112

Logical block - BLOCK1..............................................................................................................................................................................112

Selective block -BLOCK2 ...........................................................................................................................................................................114

Remote tripping .......................................................................................................................................................................................... 119

Frequency tracking .................................................................................................................................................................................... 120

Cold Load Pickup - CLP ..............................................................................................................................................................................121

Trip circuit supervision - 74TCS................................................................................................................................................................ 123

Circuit breaker supervision .......................................................................................................................................................................126

Oscillography ............................................................................................................................................................................................. 129

5 MEASURES, LOGIC STATES AND COUNTERS 130

Protection .................................................................................................................................................................................................... 130

Delayed inputs ............................................................................................................................................................................................ 130

Internal states............................................................................................................................................................................................. 130

Counters........................................................................................................................................................................................................131

Self test .........................................................................................................................................................................................................131

Selective Block - BLOCK2..........................................................................................................................................................................132

Fault recording - SFR..................................................................................................................................................................................132

Event recording - SER................................................................................................................................................................................ 133

Oscillography - DFR ................................................................................................................................................................................... 133

NC2 0 - Manual - 01 - 2 015

6 INSTALLATION 135

6.1 PACKAGING.....................................................................................................................................................................................................135

6.2 MOUNTING......................................................................................................................................................................................................135

6.3 ELECTRICAL CONNECTIONS ....................................................................................................................................................................... 139

6.4 NOMINAL CURRENT InAND IEn SETTING ................................................................................................................................................146

6.5 LED ALLOCATION........................................................................................................................................................................................... 150

6.6 FINAL OPERATIONS ...................................................................................................................................................................................... 150

7 PROGRAMMING AND SETTINGS 151

7.1 SW ThySetter...................................................................................................................................................................................................151

ThySetter installation..................................................................................................................................................................................151

ThySetter use ...............................................................................................................................................................................................151

7.2 MMI (Man Machine Interface) ....................................................................................................................................................................152

Reading variables (READ)..........................................................................................................................................................................152

Setting modifying (SET) ............................................................................................................................................................................. 153

TEST...............................................................................................................................................................................................................154

COMMUNICATION......................................................................................................................................................................................154

Circuit breaker commands ........................................................................................................................................................................154

Enable / block changes via keyboard - Password.................................................................................................................................155

7.3 MENU TREE......................................................................................................................................................................................................157

7.4 MODULES MANAGEMENT ...........................................................................................................................................................................164

7.5 MAINTENANCE...............................................................................................................................................................................................164

7.6 REPAIR..............................................................................................................................................................................................................164

7.7 PACKAGING.....................................................................................................................................................................................................164

8 APPENDIX 165

8.1 APPENDIX A1 - Inverse time IEC curves ...................................................................................................................................................165

Mathematical formula................................................................................................................................................................................165

Neutral unbalance current 46N - Standard inverse time curve (IEC 60255-3/BS142 type A)........................................................166

Neutral unbalance current 46N - Very inverse time curve (IEC 60255-3/BS142 type B) ................................................................167

Neutral unbalance current 46N -Extremely inverse time curve (IEC 60255-3/BS142 type C)....................................................... 168

Phase overcurrent 50/51 RMS - Standard inverse time curve (IEC 60255-3/BS142 type A)......................................................... 169

Phase overcurrent 50/51 RMS - Very inverse time curve (IEC 60255-3/BS142 type B) ................................................................. 170

Phase overcurrent 50/51 RMS - Extremely inverse time curve (IEC 60255-3/BS142 type C).........................................................171

Residual overcurrent 50N/51N - Standard inverse time curve (IEC 60255-3/BS142 type A) .........................................................172

Residual overcurrent 50N/51N - Very inverse time curve (IEC 60255-3/BS142 type B)................................................................. 173

Residual overcurrent 50N/51N - Extremely inverse time curve (IEC 60255-3/BS142 type C) ........................................................174

8.2 APPENDIX A2 - Inverse time ANSI/IEEE curves .......................................................................................................................................175

Mathematical formula................................................................................................................................................................................175

Neutral unbalance current 46N - Moderately inverse time curve (ANSI/IEEE type MI)................................................................176

Neutral unbalance current 46N - Very inverse time curve (ANSI/IEEE type VI) .............................................................................177

Neutral unbalance current 46N - Extremely inverse time curve (ANSI/IEEE type EI)................................................................... 178

Phase overcurrent 50/51 RMS - Moderately inverse time curve (ANSI/IEEE type MI)................................................................. 179

Phase overcurrent 50/51 RMS - Very inverse time curve (ANSI/IEEE type VI)............................................................................... 180

Phase overcurrent 50/51 RMS - Extremely inverse time curve (ANSI/IEEE type EI) ......................................................................181

Residual overcurrent 50N/51N - Moderately inverse time curve (ANSI/IEEE type MI) .................................................................182

Residual overcurrent 50N/51N - Very inverse time curve (ANSI/IEEE type VI) .............................................................................. 183

Residual overcurrent 50N/51N - Extremely inverse time curve (ANSI/IEEE type EI)......................................................................184

8.4 APPENDIX B1 - I/O Diagram .........................................................................................................................................................................185

8.5 APPENDIX B2 - Interfaces ............................................................................................................................................................................186

8.6 APPENDIX B3- Connection diagrams .........................................................................................................................................................187

8.7 APPENDIX C - Dimensions........................................................................................................................................................................... 189

8.8 APPENDIX D - Setting table......................................................................................................................................................................... 190

8.8 APPENDIX E - Revisions history...................................................................................................................................................................226

8.9 APPENDIX F - EC Declaration of conformity..............................................................................................................................................227

NC2 0 - Manual - 01 - 2 015

PREFACE

1 INTRODUCTION

Scope and liability

This document describes the functions, the technical data of NC20 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 NC20 devices with ﬁrmware version 1.61 and following.

Conformity

The product complies with the CEE directives:

EMC Council Directives: 89/336/EEC

Low voltage Directives: 73/23/EEC

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.

•

DANGER Death, severe personal injury or substantial property damage will result if proper precautions

are not taken

DANGER Death, severe personal injury or substantial property damage will result if proper precautions

are not taken

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.

6NC2 0 - Manual - 01 - 2 015 PREFACE

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 NC20 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:

I> element

Deﬁnite time

I>def

The display messages (MMI) are shown as:

NC20

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

INn Relay unbalance nominal current

INnp

Unbalance CT nominal primary current

27 Undervoltage ANSI code

46 Phase unbalance overcurrent ANSI code

46N Neutral unbalance overcurrent with inherent unbalance compensa-

tion ANSI code

49 Thermal image (for series reactor) ANSI code

50/51 Fundamental phase overcurrent ANSI code

50/51 RMS RMS phase overcurrent ANSI code

50N/51N Computed residual overcurrent ANSI code

59 Overvoltage ANSI code

TD Discharge Timer

BF Circuit breaker failure ANSI code

74CT CT supervision ANSI code

74TCS Trip Circuit Supervision ANSI code

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 ThySetter software are described in the relative chapters

•

NC20#JA2MMB0

UAUX 110-230 Vac/dc

100V

IEn

INn

1A 1A

5A 1A 5A

5A 1A

5NC20#JA2MMB0

UAUX 110-230 Vac/dc

100V

IEn

INn

1A 1A

5A 1A 5A

5A 1A

NC2 0 - Manual - 01 - 2 015

PREFACE

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...K6...K10 Output relays

Pulse Output relay with pulse operation

tTR 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 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

ThySetter Setting and monitoring software

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

J2SE Java Platform Standard Edition

Subnet Mask (Ethernet nomenclature)

Sw Software

Fw Firmware

Upgrade Firmware upgrade

XML eXtensible Markup Language

8NC2 0 - Manual - 01 - 2 015 PREFACE

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 (tOFF delay)

Curve type (deﬁnite/inverse time)

IL3

Max[IL1 ,IL2 ,IL3 ]

IL2

IL1

tON tON tON tON

RESET

INPUT

OUTPUT

tOFF

INPUT

OUTPUT

tON tON tON

INPUT

OUTPUT

tON

& &

≥1≥1

EXOR logic gate

tOFF

I>>

II ≥

I>>

tON

RESET

NC2 0 - Manual - 01 - 2 015

PREFACE

Symbols1 .ai

RESET

INPUT

OUTPUT

tOFF

tOFF tOFF

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 (tOFF delay)

10 GENERAL

NC2 0 - Manual - 01 - 2 015

2 GENERAL

Preface

The relay type NC20 provides protection of shunt capacitor banks and harmonic ﬁlter circuits.

The capacitor banks may have the following conﬁgurations:

Single Wye grounded.

Single Wye ungrounded (with a resistor on the output of the neutral unbalance voltage transformer

in order to develop the appropriate input current for the unbalance protection).

Double Wye ungrounded.

The capacitor banks may be: internally/externally fused or fuseless capacitor units.

A suitable compensation method is provided to compensate the inherent unbalance neutral cur-

rent.

Following input circuits are available:

Three phase current and one neutral unbalanced current inputs with nominal currents indepen-

dently selectable at 1 A or 5 A using dip-switch.

Three phase voltages (line-to-ground) with nominal voltages programmable in the range 50...130 V

(UR=100V) .

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) and Programmable Logic controller (PLC) 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 NC20 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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