Thytronic NC020 Manual de usuario

NC020 - Manual - 05 - 2022

MANUAL

NC020

FILTER & CAPACITOR BANK

PROTECTION RELAY

NC020 - 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 ...............................................................................................................................................................................................................11

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

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

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

Unbalance neutral 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 port....................................................................................................................................................................................................15

3.6 GENERAL SETTINGS ........................................................................................................................................................................................15

3.7 PROTECTIVE ELEMENTS .................................................................................................................................................................................15

Discharge time - TD......................................................................................................................................................................................15

Undercurrent - 37..........................................................................................................................................................................................15

Neutral unbalance overcurrent - 46N........................................................................................................................................................15

Phase overcurrent - 50/51 RMS..................................................................................................................................................................16

Phase overcurrent - 50/51 Fundamental ...................................................................................................................................................17

Residual overcurrent - 50N/51N .................................................................................................................................................................17

Peak overvoltage - 59H ............................................................................................................................................................................... 18

Breaker failure - BF...................................................................................................................................................................................... 18

3.8 CONTROL AND MONITORING....................................................................................................................................................................... 19

Circuit Breaker monitoring ......................................................................................................................................................................... 19

Oscillography (DFR) ..................................................................................................................................................................................... 19

3.9 MEASURES ....................................................................................................................................................................................................... 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

NC020 - Manual - 05 - 2022

Base protocol (kernel)..................................................................................................................................................................................22

Calibration (kernel)........................................................................................................................................................................................22

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...............................................................................................................................................................................26

Binary inputs ..................................................................................................................................................................................................27

LED indicators............................................................................................................................................................................................... 29

Communication interfaces.......................................................................................................................................................................... 30

4.4 PROTECTIVE ELEMENTS .................................................................................................................................................................................31

Rated values...................................................................................................................................................................................................31

TD Discharge time........................................................................................................................................................................................ 33

Neutral unbalance current - 46N................................................................................................................................................................34

Phase overcurrent - 50/51 RMS..................................................................................................................................................................37

Fundamental phase overcurrent - 50/51................................................................................................................................................... 39

Residual overcurrent - 50N/51N .................................................................................................................................................................42

Peak 0vervoltage - 59H.................................................................................................................................................................................44

4.5 CONTROL AND MONITORING....................................................................................................................................................................... 49

Circuit breaker supervision ........................................................................................................................................................................ 49

Test................................................................................................................................................................................................................. 50

Oscillography ............................................................................................................................................................................................... 50

—5 MEASURES, LOGIC STATES AND COUNTERS 51

Measures........................................................................................................................................................................................................51

Circuit breaker ...............................................................................................................................................................................................51

Counters..........................................................................................................................................................................................................51

Fault recording - SFR....................................................................................................................................................................................51

Event recording - Events..............................................................................................................................................................................52

Info...................................................................................................................................................................................................................52

Protections trip ..............................................................................................................................................................................................52

Self-test...........................................................................................................................................................................................................52

Oscillography - DFR ..................................................................................................................................................................................... 53

—6 INSTALLATION 55

6.1 PACKAGING.......................................................................................................................................................................................................55

6.2 MOUNTING........................................................................................................................................................................................................55

6.3 ELECTRICAL CONNECTIONS ..........................................................................................................................................................................57

6.4 NOMINAL CURRENT InAND IEn SETTING ................................................................................................................................................. 60

6.5 LED ALLOCATION..............................................................................................................................................................................................62

6.6 FINAL OPERATIONS .........................................................................................................................................................................................62

—7 PROGRAMMING AND SETTINGS 63

7.1 SW ThyVisor ..................................................................................................................................................................................................... 63

7.2 MMI (Man Machine Interface) ......................................................................................................................................................................64

Reading variables (READ)............................................................................................................................................................................64

Setting modifying (SET) ................................................................................................................................................................................64

Communication..............................................................................................................................................................................................66

Reset................................................................................................................................................................................................................66

DEFAULT (Option) ..........................................................................................................................................................................................66

Data/time setting (Time) ...............................................................................................................................................................................66

7.3 MENU TREE........................................................................................................................................................................................................67

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

NC020 - Manual - 05 - 2022

8.2 APPENDIX A2 - Inverse time ANSI/IEEE curves .........................................................................................................................................75

Phase overcurrent 50/51 - Moderately inverse time curve (ANSI/IEEE type MI)..............................................................................76

Phase overcurrent 50/51 - Very inverse time curve (ANSI/IEEE type VI) ...........................................................................................77

Phase overcurrent 50/51 - Extremely inverse time curve (ANSI/IEEE type EI)................................................................................. 78

8.3 APPENDIX A3 - CAPACITOR curves............................................................................................................................................................. 79

RMS phase overcurrent 50/51 RMS - CAPACITOR curve ..................................................................................................................... 80

RMS phase overcurrent 50/51 fundamental - CAPACITOR curve.........................................................................................................81

8.4 APPENDIX B1 - I/O Diagram ...........................................................................................................................................................................82

8.5 APPENDIX B2 - Interfaces ............................................................................................................................................................................. 83

8.6 APPENDIX B3 - Connection diagrams ..........................................................................................................................................................84

8.7 APPENDIX C - Dimensions..............................................................................................................................................................................85

8.8 APPENDIX D - EC Declaration of conformity ...............................................................................................................................................86

INTRODUCTION 5

NC020 - Manual - 05 - 2022

1 INTRODUCTION

—Scope and liability

This document describes the functions, the technical data of NC020 devices; instructions for mount-

ing, setting and commissioning are included.

This manual has been checked out, however, deviations from the description cannot be completely

ruled out, so that no liability in a legal sense for correctness and completeness of the information or

from any damage that might result from its use is formally disclaimed.

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 NC020 devices with ﬁrmware version 1.30 and following.

Revision history is listed in appendix.

—Conformity

The product complies with the CEE directives:

• EMC Directive 2014/30/EC

• Low Voltage Directive2014/35/EC

—Technical support

Contact: THYTRONIC Technical Service www.thytronic.it

—Copyright

—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

NC020 - 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 NC020 device must be employed according to the environment conditions shown (see technical

data).

In case of different environment conditions, appropriate provisions must be provided (conditioning

system, humidity control, etc...).

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:

NC020

Notes are highlighted with cursive letters inside colored bar

Note: Useful description note

—Glossary/definitions

nRelay phase rated current

np Phase CT primary rated current

Nn Relay neutral rated current

Nnp Phase CT neutral rated current

NC Compensation neutral current

EC Calculated residual rated current

3Calculated peak voltages

46N Neutral unbalance overcurrent ANSI code

50/51 Phase overcurrent ANSI code

50/51 RMS Phase overcurrent ANSI code

50N/51N Residual overcurrent ANSI code

59H Peak overvoltage ANSI code

TD Discharge timer

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

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)

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

NC020#xM000

In1A

50-51

46N-50N

CB OPEN

UAUX 24-230 Vac/dc

INn 1A 5A

INTRODUCTION 7

NC020 - Manual - 05 - 2022

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

NC020 - 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 ThyVisor + 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

0 T

INTRODUCTION 9

NC020 - Manual - 05 - 2022

Symbols1 .ai

tON tON tON

RESET

INPUT

OUTPUT

tDROP

tDROP tDROP

Minimum pulse width operation for output relays (tTR

)

tTR

INPUT

OUTPUT

tTR

0 T

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)

GENERAL 10

NC020 - Manual - 05 - 2022

2 GENERAL

—Preface

In recent years the harmonic producing part of total load has increased continuously because of the

massive usage of power electronic in all the voltage levels. Thyristor convertors, Frequency con-

vertors, thyristor switches and static var compensator, such as thyristor controlled reactors (TCR)

and thyristor switched capacitors (TSC), are commonly adopted in industrial applications and power

utilities.

Filter capacitor banks consist of capacitor bank and series connected air core. Their task is to ab-

sorb the harmonic currents generated by loads and all above mentioned power electronic devices.

The aim of NC020 is to provide a reliable and cost effective solution for such an application granting

capacitor bank safe operations.

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.

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

rent.

Protection 50/51 RMS is based on RMS value measurement of the three phase currents (fundamental

and harmonics up to the 23th).

The peak capacitor voltage is calculated (fundamental frequency and harmonics up to twenty-third

order) for any phase by means of integration of measured line currents without requiring the instal-

lation of VTs for the direct measurement of the capacitor voltages.

Following input circuits are available:

• Three phase current and one neutral current inputs with rated currents independently selectable

at 1 A or 5 A using DIP-switch (CT inputs).

• Three binary inputs.

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 NC020 hardware case is suitable for ﬂash and rack mounting

Other options are:

• Auxiliary power supply operating range.

• Communication protocols (Modbus RTU).

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