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Service Manual

Types KVFG 122, 142

Voltage and Frequency Relays

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Service Manual

Types KVFG 122, 142Voltage and Frequency Relays

HANDLING OF ELECTRONIC EQUIPMENT

A person's normal movements can easily generate electrostatic potentials of several thousand volts.Discharge of these voltages into semiconductor devices when handling electronic circuits can causeserious damage, which often may not be immediately apparent but the reliability of the circuit will havebeen reduced.

The electronic circuits of ALSTOM T&D Protection & Control Ltd products are immune to the relevant levelsof electrostatic discharge when housed in their cases. Do not expose them to the risk of damage bywithdrawing modules unnecessarily.

Each module incorporates the highest practicable protection for its semiconductor devices. However, if itbecomes necessary to withdraw a module, the following precautions should be taken to preserve the highreliability and long life for which the equipment has been designed and manufactured.

1. Before removing a module, ensure that you are at the same electrostatic potential as the equipmentby touching the case.

2. Handle the module by its front-plate, frame, or edges of the printed circuit board.Avoid touching the electronic components, printed circuit track or connectors.

3. Do not pass the module to any person without first ensuring that you are both at the sameelectrostatic potential. Shaking hands achieves equipotential.

4. Place the module on an antistatic surface, or on a conducting surface which is at the samepotential as yourself.

5. Store or transport the module in a conductive bag.

More information on safe working procedures for all electronic equipment can be found in BS5783 andIEC 60147-0F.

If you are making measurements on the internal electronic circuitry of an equipment in service, it is

preferable that you are earthed to the case with a conductive wrist strap.Wrist straps should have a resistance to ground between 500k 10M ohms. If a wrist strap is notavailable, you should maintain regular contact with the case to prevent the build up of static.Instrumentation which may be used for making measurements should be earthed to the case wheneverpossible.

ALSTOM T&D Protection & Control Ltd strongly recommends that detailed investigations on the electroniccircuitry, or modification work, should be carried out in a Special Handling Area such as described inBS5783 or IEC 60147-0F.

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SERVICE MANUAL R8559BKVFG 122, 142 Contents

SAFETY SECTION

THIS MUST BE READ BEFORE ANY WORK IS CARRIED OUT ON THE RELAY

CHAPTER 1 INTRODUCTION

CHAPTER 2 HANDLING AND INSTALLATION

CHAPTER 3 RELAY DESCRIPTION

CHAPTER 4 APPLICATION OF PROTECTION FUNCTIONS

CHAPTER 5 MEASUREMENT AND RECORDS

CHAPTER 6 SERIAL COMMUNICATIONS

CHAPTER 7 TECHNICAL DATA

CHAPTER 8 COMMISSIONING

APPENDIX 1 LOGIC DIAGRAMS

APPENDIX 2 CONNECTION DIAGRAMS

APPENDIX 3 COMMISSIONING TEST RECORD

Our policy is one of continuous product development and the right is reserved to supply equipment

which may vary from that described.

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SAFETY SECTION

This Safety Section should be read before commencing any work on the equipment.

Health and safety

The information in the Safety Section of the product documentation is intended toensure that products are properly installed and handled in order to maintain themin a safe condition. It is assumed that everyone who will be associated with theequipment will be familiar with the contents of the Safety Section.

Explanation of symbols and labels

The meaning of symbols and labels which may be used on the equipment or in theproduct documentation, is given below.

Caution:refer to product documentation Caution:risk of electric shock

Protective/safety *earth terminal

Functional *earth terminal.Note: this symbol may also be used for a protective/safety earth terminal if that terminal is part of aterminal block or sub-assembly eg. power supply.

*Note:The term earth used throughout the product documentation is the directequivalent of the North American term ground.

Installing, Commissioning and Servicing

Equipment connectionsPersonnel undertaking installation, commissioning or servicing work on thisequipment should be aware of the correct working procedures to ensure safety.The product documentation should be consulted before installing, commissioning orservicing the equipment.

Terminals exposed during installation, commissioning and maintenance maypresent a hazardous voltage unless the equipment is electrically isolated.

If there is unlocked access to the rear of the equipment, care should be taken by allpersonnel to avoid electric shock or energy hazards.

Voltage and current connections should be made using insulated crimpterminations to ensure that terminal block insulation requirements are maintainedfor safety. To ensure that wires are correctly terminated, the correct crimp terminaland tool for the wire size should be used.

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Before energising the equipment it must be earthed using the protective earthterminal, or the appropriate termination of the supply plug in the case of plugconnected equipment. Omitting or disconnecting the equipment earth may cause a

safety hazard.The recommended minimum earth wire size is 2.5 mm2, unless otherwise stated inthe technical data section of the product documentation.

Before energising the equipment, the following should be checked:

Voltage rating and polarity;

CT circuit rating and integrity of connections;

Protective fuse rating;

Integrity of earth connection (where applicable)

Equipment operating conditions

The equipment should be operated within the specified electrical andenvironmental limits.

Current transformer circuits

Do not open the secondary circuit of a live CT since the high voltage producedmay be lethal to personnel and could damage insulation.

External resistors

Where external resistors are fitted to relays, these may present a risk of electric

shock or burns, if touched.Battery replacement

Where internal batteries are fitted they should be replaced with the recommendedtype and be installed with the correct polarity, to avoid possible damage to theequipment.

Insulation and dielectric strength testing

Insulation testing may leave capacitors charged up to a hazardous voltage. At theend of each part of the test, the voltage should be gradually reduced to zero, todischarge capacitors, before the test leads are disconnected.

Insertion of modules and pcb cards

These must not be inserted into or withdrawn from equipment whilst it is energised,since this may result in damage.

Fibre optic communication

Where fibre optic communication devices are fitted, these should not be vieweddirectly. Optical power meters should be used to determine the operation or signallevel of the device.

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Older ProductsElectrical adjustments

Equipments which require direct physical adjustments to their operating mechanismto change current or voltage settings, should have the electrical power removedbefore making the change, to avoid any risk of electric shock.

Mechanical adjustments

The electrical power to the relay contacts should be removed before checking anymechanical settings, to avoid any risk of electric shock.

Draw out case relays

Removal of the cover on equipment incorporating electromechanical operatingelements, may expose hazardous live parts such as relay contacts.

Insertion and withdrawal of extender cardsWhen using an extender card, this should not be inserted or withdrawn from theequipment whilst it is energised. This is to avoid possible shock or damagehazards. Hazardous live voltages may be accessible on the extender card.

Insertion and withdrawal of heavy current test plugs

When using a heavy current test plug, CT shorting links must be in place beforeinsertion or removal, to avoid potentially lethal voltages.

Decommissioning and Disposal

Decommissioning: The auxiliary supply circuit in the relay may includecapacitors across the supply or to earth. To avoid electricshock or energy hazards, after completely isolating thesupplies to the relay (both poles of any dc supply), thecapacitors should be safely discharged via the externalterminals prior to decommissioning.

Disposal: It is recommended that incineration and disposal to watercourses is avoided. The product should be disposed of in asafe manner. Any products containing batteries should havethem removed before disposal, taking precautions to avoidshort circuits. Particular regulations within the country ofoperation, may apply to the disposal of lithium batteries.

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Technical SpecificationsProtective fuse rating

The recommended maximum rating of the external protective fuse for thisequipment is 16A, Red Spot type or equivalent, unless otherwise stated in thetechnical data section of the product documentation.

Insulation class: IEC 61010-1: 1990/A2: 1995 This equipment requires aClass I protective (safety) earthEN 61010-1: 1993/A2: 1995 connection to ensure userClass I safety.

Installation IEC 61010-1: 1990/A2: 1995 Distribution level, fixedCategory Category III installation. Equipment in(Overvoltage): EN 61010-1: 1993/A2: 1995 this category is qualification

Category III tested at 5kV peak,1.2/50s, 500, 0.5J,between all supply circuitsand earth and also betweenindependent circuits.

Environment: IEC 61010-1: 1990/A2: 1995 Compliance is demonstratedPollution degree 2 by reference to generic safetyEN 61010-1: 1993/A2: 1995 standards.Pollution degree 2

Product safety: 73/23/EEC Compliance with theEuropean Commission LowVoltage Directive.

EN 61010-1: 1993/A2: 1995 Compliance is demonstratedEN 60950: 1992/A11: 1997 by reference to generic safety

standards.

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Types KVFG 122, 142


Service Manual

Chapter 1

Introduction

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SERVICE MANUAL R8559BKVFG 122, 142 Chapter 1

Contents

1. INTRODUCTION 1

2. USING THE MANUAL 1

3. AN INTRODUCTION TO KVFG RELAYS 2

4. MODELS AVAILABLE AND MAIN FEATURES 2

5. AVAILABILITY OF MAIN FEATURES 3

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Page 1 of 3

Section 1. INTRODUCTION

The KVFG relay provides comprehensive voltage protection for phase and earth

faults together with measurements, communications, control and recordingfacilities. In addition, the relay incorporates frequency elements. As part of theK Range of relays, the KVFG can be integrated into an overall protection andcontrol system by utilising its serial communications, thereby providing informationfor day to day management of power systems.

This manual details the menu, functions and logic for the KVFG relays.

Section 2. USING THE MANUAL

This manual provides a description of the KVFG relays. It is intended to guide theuser through application, installation, setting and commissioning of the relays.

The manual has the following format:

Chapter 1. Introduction

An introduction on how to use this manual and a generalintroduction to the relays covered by the manual.

Chapter 2. Handling and installation

Precautions to be taken when handling electronic equipment

Chapter 3. Relay description

A detailed description of features that are common to allKVFG relays.

Chapter 4. Application of protection functions

An introduction to the applications of the relays and specialfeatures provided.

Chapter 5. Measurements and records

How to customise the measurements and use the recording features.

Chapter 6. Serial communications

Hints on using the serial communication feature.

Chapter 7. Technical data

Comprehensive details on the ratings, setting ranges andspecifications etc.

Chapter 8. Commissioning

A guide to commissioning, problem solving and maintenance.

Appendix Appendices include relay logic diagrams, connection diagramsand commissioning test records.

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Page 2 of 3

Section 3. AN INTRODUCTION TO KVFG RELAYS

The KVFG protection relays brings numerical technology to the successful Midos

range of protection relays. Fully compatible with the existing designs and sharingthe same modular housing concept, the relays offer more comprehensive protectionfor demanding applications.

The KVFG relays provide voltage and frequency protection for power distributionsystems, industrial power systems and all other applications where voltage orfrequency protection is required. All voltage elements are selectable to operate foreither under or overvoltage conditions, and can be selected to only operate forthree phase conditions, or more normally for any one phase. Phase segregatedoutputs are available to provide comprehensive indications to the user.Neutral voltage displacement (residual overvoltage) protection is also providedand can either use a calculated or measured value (depending upon relay modeland application). All frequency elements are selectable to operate for either underor over frequency conditions.

Integral features in KVFG relays include negative phase sequence overvoltage,undervoltage blocking, load shedding capabilities and two alternative groups ofpredetermined settings. The relays also have integral serial communication facilitiesvia K-Bus.

Section 4. MODELS AVAILABLE AND MAIN FEATURES

Two versions of the KVFG are available:

KVFG 122 Two pole voltage/frequency relay

KVFG 142 Four pole voltage/frequency relay

The KVFG 122, due to its limited analogue inputs offers functionality which ishighly dependent upon its connection. Two operation modes are available, setaccording to system data function link SDA. With SDA = 1, the relay is intendedfor neutral voltage displacement applications, whereas with SDA = 0 the relay isintended for phase-phase voltage/frequency protection.

The KVFG 142 has four analogue input circuits and therefore offers a completerange of protection functions, only dependent upon the protection VT.

The following table lists the features that vary between the two models, with themode of operation for the KVFG 122 also being considered.

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Page 3 of 3

Section 5. AVAILABILITY OF MAIN FEATURES

Feature KVFG 122 KVFG142

SDA = 0 SDA = 1Protection

Undervoltage q q 1 q

Overvoltage q q 1 q

Neutral voltage displacement q q

Underfrequency q q 1 q

Overfrequency q q 1 q

Negative sequence overvoltage q q

Measurement

Frequency q q 1 q

Voltage (phase-phase) q q 1 q

Voltage (phase-neutral) q 1 q

Residual voltage q q

Positive sequence voltage q q

Negative sequence voltageq q

CB operations q q q

Programmable Inputs/Outputs

Logic inputs 3 3 8

Output relays 4 4 8

Note: q indicates that a function is always available.

q1 indicates that this function will only be available if the 'spare' input is connectedto a suitable voltage input.

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Types KVFG 122, 142


Service Manual

Chapter 2

Handling and Installation

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Contents

1. GENERAL CONSIDERATIONS 11.1 Receipt of relays 11.2 Electrostatic discharge (ESD) 1

2. HANDLING OF ELECTRONIC EQUIPMENT 13. RELAY MOUNTING 2

4. UNPACKING 2

5. STORAGE 3

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Page 1 of 3

Section 1. GENERAL CONSIDERATIONS

1.1 Receipt of relays

Protective relays, although generally of robust construction, require carefultreatment prior to installation on site. Upon receipt, relays should be examinedimmediately to ensure no damage has been sustained in transit. If damage hasbeen sustained during transit a claim should be made to the transport contractorand ALSTOM T&D Protection & Control Ltd should be promptly notified.

Relays that are supplied unmounted and not intended for immediate installationshould be returned to their protective polythene bags.

1.2 Electrostatic discharge (ESD)

The relays use components that are sensitive to electrostatic discharges.

The electronic circuits are well protected by the metal case and the internal moduleshould not be withdrawn unnecessarily. When handling the module outside itscase, care should be taken to avoid contact with components and electricalconnections. If removed from the case for storage, the module should be placed inan electrically conducting antistatic bag.

There are no setting adjustments within the module and it is advised that it is notunnecessarily disassembled. Although the printed circuit boards are pluggedtogether, the connectors are a manufacturing aid and not intended for frequentdismantling; in fact considerable effort may be required to separate them. Touchingthe printed circuit board should be avoided, since complementary metal oxidesemiconductors (CMOS) are used, which can be damaged by static electricity

discharged from the body.

Section 2. HANDLING OF ELECTRONIC EQUIPMENT

A persons normal movements can easily generate electrostatic potentials of severalthousand volts. Discharge of these voltages into semiconductor devices whenhandling electronic circuits can cause serious damage, which often may not beimmediately apparent but the reliability of the circuit will have been reduced.

The electronic circuits are completely safe from electrostatic discharge whenhoused in the case. Do not expose them to risk of damage by withdrawing

modules unnecessarily.Each module incorporates the highest practicable protection for its semiconductordevices. However, if it becomes necessary to withdraw a module, the folowingprecautions should be taken to preserve the high reliability and long life for whichthe equipment has been designed and manufactured.

1. Before removing a module, ensure that you are at the same electrostaticpotential as the equipment by touching the case.

2. Handle the module by its frontplate, frame or edges of the printed circuit board.Avoid touching the electronic componenets, printed circuit track or connectors.

3. Do not pass the module to another person without first ensuring you are both atthe same electrostatic potential. Shaking hands achieves equipotential.

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Page 2 of 3

4. Place the module on an antistatic surface, or on a conducting surface which isat the same potential as yourself.

5. Store or transport the module in a conductive bag.

If you are making measurements on the internal electronic circuitry of anequipment in service, it is preferable that you are earthed to the case with aconductive wrist strap. Wrist straps should have a resistance to ground between500k 10M.If a wrist strap is not available you should maintain regular contact with the case toprevent a build-up of static. Instrumentation which may be used for makingmeasurements should be earthed to the case whenever possible.

More information on safe working procedures for all electronic equipment can befound in BS5783 and IEC 60147-OF. It is strongly recommended that detailedinvestigations on electronic circuitry or modification work should be carried out in

a special handling area such as described in the above-mentioned BS and IECdocuments.

Section 3. RELAY MOUNTING

Relays are dispatched either individually or as part of a panel/rack assembly.If loose relays are to be assembled into a scheme, then construction details can befound in Publication R7012. If an MMLG test block is to be included it should bepositioned at the right-hand side of the assembly (viewed from the front). Modulesshould remain protected by their metal case during assembly into a panel or rack.The design of the relay is such that the fixing holes are accessible without removalof the cover. For individually mounted relays an outline diagram is normallysupplied showing the panel cut-outs and hole centres. These dimensions will alsobe found in Publication R6559.

Section 4. UNPACKING

Care must be taken when unpacking and installing the relays so that none of theparts is damaged or the settings altered. Relays must only be handled by skilledpersons. The installation should be clean, dry and reasonably free from dust andexcessive vibration. The site should be well lit to facilitate inspection. Relays that

have been removed from their cases should not be left in situations where they areexposed to dust or damp. This particularly applies to installations which are beingcarried out at the same time as construction work.

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Page 3 of 3

Section 5. STORAGE

If relays are not to be installed immediately upon receipt they should be stored in a

place free from dust and moisture in their original cartons. Where de-humidifierbags have been included in the packing they should be retained. The action of thede-humidifier crystals will be impaired if the bag has been exposed to ambientconditions and may be restored by gently heating the bag for about an hour, priorto replacing it in the carton.

Dust which collects on a carton may, on subsequent unpacking, find its way intothe relay; in damp conditions the carton and packing may become impregnatedwith moisture and the de-humifier will lose its efficiency.

Storage temperature 25C to +70C.

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Types KVFG 122, 142


Service Manual

Chapter 3

Relay Description

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Contents

1. RELAY DESCRIPTION 1

2. USER INTERFACE 22.1 Frontplate layout 2

2.2 LED indications 32.3 Keypad 32.4 Liquid crystal display 32.5 Flag display format 3

3. MENU SYSTEM 53.1 Default display 53.2 Accessing the menu 53.3 Menu contents 63.4 Menu columns 63.5 System data 7

3.6 Fault records 83.7 Measurements 1 83.8 Measurements 2 93.9 Neutral displacement 1 93.10 Under/overvoltage 1 103.11 Under/overfrequency 1 113.12 Negative sequence 1 123.13 Neutral displacement 2 133.14 Under/overvoltage 2 133.15 Under/overfrequency 2 153.16 Negative sequence 2 16

3.17 Logic 163.18 Input masks 173.19 Relay masks 183.20 Recorder 19

4 CHANGING TEXT AND SETTINGS 214.1 Quick guide to menu controls 214.2 To enter setting mode 224.3 To escape from the setting mode 224.4 To accept the new setting 224.5 Password protection 234.6 Entering passwords 23

4.7 Changing passwords 234.8 Restoration of password protection 244.9 Entering text 244.10 Changing function links 244.11 Changing setting values 244.12 Setting communication address 254.13 Setting input masks 254.14 Setting output masks 254.15 Resetting values and records 254.16 Resetting trip LED indication 264.17 Selecting default display 26

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Contents

5 EXTERNAL CONNECTIONS 275.1 Auxiliary supply 285.2 Logic control inputs 28

5.2 Analogue inputs 295.4 Output relays 295.5 Ouput relay minimum dwell time 305.6 Setting the relay with a PC or laptop 30

6. ALARM FLAGS 30

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Page 1 of 30

Section 1. RELAY DESCRIPTION

The KVFG 122 and KVFG 142 relays use numerical techniques to derive

protection and control functions. The KVFG 142 has four multiplexed analogueinputs whilst the KVFG 122 has two, each is sampled eight times per powerfrequency cycle. The Fourier derived power frequency component returns the rmsvalue of the measured quantity. To ensure optimum performance, frequencytracking is used. The channel that is tracked is chosen on a priority basis, Va, Vb,Vc. Frequency tracking is not employed on the residual voltage to ensure maximumharmonic rejection. In the absence of a signal to frequency track, the samplingfrequency defaults to the rated frequency of the power system.

The KVFG 142 has eight output relays and eight logic inputs, the KVFG 122 hasfour relay outputs and three logic inputs. Each output relay can be programmed torespond to any of the protection or control functions, logic inputs can be allocatedto initiate control functions. The logic inputs are filtered to ensure that induced accurrent in the external wiring to these inputs does not cause an incorrect response.Software links further enable the user to customise the product for their ownparticular applications. They select/interconnect the various protection and controlelements and replace the interconnections that were previously used between thecases of relays that provided discrete protection or control functions.

The relays are powered from either a dc or an ac auxiliary supply which istransformed by a wide ranging dc/dc converter within the relay. This provides theelectronic circuits with regulated and galvanically isolated supply rails.

The power supply also provides a regulated and isolated field voltage to energise

the logic inputs.An interface on the front of the relay allows the user to navigate through the menuto access data, change settings and reset flags, etc. As an alternative the relayscan be connected to a computer via their serial communication ports and the menuaccessed on-line. This provides a more friendly and intuitive method of setting therelay, as it allows a whole column of data to be displayed at one time instead ofjust a single menu cell. Computer programs are also available that enable settingfiles to be generated off-line and these files can then be downloaded to the relayvia the serial port.

In addition to protection and control functions the relays can display all the valuesthat it measures and many additional ones that it calculates. They also store useful

time stamped data for post fault analysis in fault records, event records anddisturbance records. This data is available via a serial communication port foraccess locally and/or remotely with a computer. The fault records, event recordsand disturbance records can be extracted automatically via the serial port andvalues can be polled periodically to determine trends. Remote control actions canalso be made and to this end many K Range relays have been integrated intoSCADA systems.

K Range relays provide the user with the flexibility to customise the relay for theirparticular applications. They provide many additional features that would beexpensive to produce on an individual basis and, when the low installation costsare taken into account, it will be seen to provide an economic solution for

protection and control.

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Page 2 of 30

Section 2. USER INTERFACE

The front plate of the relay provides a man machine interface providing the user

with a means of entering settings to the relay displaying measured values, faultrecords and alarms. The series 2 relays have additional graphics to assist the user.The area in which the fault flags are displayed is divided up to denote the areaassociated with each tripping function.

2.1 Frontplate layout

Figure 1. Frontplate layout

The frontplate of the relay carries a liquid crystal display (LCD) on which data suchas settings and measured values can be viewed. The data is accessed through amenu system. The four keys [F]; [+]; [] and [0] are used to move around the menu,select the data to be accessed and enter settings. Three light emitting diodes (LEDs)indicate alarm, healthy and trip conditions.

A label at the top corner identifies the relay by both its model number and serialnumber. This information uniquely specifies the product and is required whenmaking any enquiry to the factory about a particular relay. In addition there is arating label in the bottom corner which gives details of the auxiliary voltage andreference voltage. Two handles, one at the top and one at the bottom of the

frontplate, will assist in removing the module from the case.

F + 0

Relay types

Liquidcrystaldisplay

LED indicators

Ratings

Model number

Serial number

Digit identifiers

Entry keys

Hz

24/125V

Vn

KVFG142KVFG142

167342J

-

Vx

110V 50/60

Flag identifiers

STAGE 2

STAGE 1

STAGE 3

ALARMALARM TRIP

GROUP

CFREQUENCY

EF D

FAULT No

SETTING

3AB 89 67 5 4

Va/Vab

12 0

HEALTHY

F n _ 2 G 2 1 32 4 1 32 4

R T 12

1 2

Vb/Vbc V2

3 4 1 32 4 1 32 1 32

Vc/Vca Vo AUX

RESET

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Page 3 of 30

2.2 LED indications

The three LEDs provide the following functions:

GREEN LED Indicates the relay is powered up and running.YELLOW LED Indicates alarm conditions that have been detected by the relay

during its self checking routine. The alarm lamp flashes when thepassword is entered (password inhibition temporarily overridden).

RED LED Indicates a trip that has been issued by the relay. This may be aprotection trip or result from a remote trip command; this can bedetermined by viewing the trip flags.

2.3 Keypad

The four keys perform the following functions:

[F] function select/digit select key/next column[+] put in setting mode/increment value/accept key/previous column

[] put in setting mode/decrement value/reject key/next column

[0] reset/escape/change default display key

Note: Only the [F] and [0] keys are accessible when the relay cover is in place.

2.4 Liquid crystal display

The liquid crystal display has two lines each of sixteen characters. A back-light isactivated when any key on the frontplate is momentarily pressed and will remain lituntil ten minutes after the last key press. This enables the display to be read in all

conditions of ambient lighting.The numbers printed on the frontplate just below the display, identify the individualdigits that are displayed for some of the settings, ie. function links, relay masks etc.Additional text around the display is used to define the areas in which the variousparts of the fault information will be found.

2.5 Flag display format

Now that there are five full fault records the top four left-hand digits no longerdisplay Fn, Fn-1, . . . Fn-4 to denote the last and previous fault flags.Instead they now display Fn to indicate latched fault flags and Fnow toindicate unlatched flags (when cell 0023 is selected from the System Data column).

The next two digits indicate the setting group that was in operation during the faultwhen Fn is displayed eg. G1 indicates setting group 1 and G2 indicatessetting group 2. When Fnow is displayed then the setting group is that which iscurrently active.

The majority of the rest of the display area is shared by six tripping functions andauxiliary timer information. The information relavant to each function is delimitedby vertical lines. There are up to four characters on the display associated witheach of these areas. Each is used to flag the operation of protection stagesallocated to each function.

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Page 4 of 30

STAGE 2

STAGE 1

STAGE 3

ALARMALARM TRIP

GROUP

CFREQUENCY

EF D

FAULT No

SETTING

3AB 89 67 5 4

Va/Vab

12 0

HEALTHY

F n _ 2 G 2 1 32 4 1 32 4

R T 12

1 2

Vb/Vbc V2

3 4 1 32 4 1 32 1 32

Vo/Vca AUXVo

Figure 2. Flag display format

As an example, consider the four character locations below the area marked|Va/Vab|. If a trip condition occurs involving phase A. Then one or morecharacters will be displayed. These characters can have one of four values, 1,

2, 3 or 4. Each digit flags the protection stage that has operated. It should benoted that each stage is independent of each other eg., stage 4 is not required tohave a greater setting than stage 1.

Flag information is similarly provided for the other five tripping functions, Vb/Vbc,V2, Frequency, Vc/Vca and Vo. It should be noted that not all tripping functionsare allocated four stages, V2 and Vo has two and three, respectively.

Three auxiliary timers are available AUX1, AUX2 and AUX3. The operation of oneor more of the timers is denoted by the digits displayed in the three characterlocations above the area marked |AUX|.

The final area of the fault display is utilised to indicate the remote trip operation of

a circuit breaker. The characters RT appear in the lower left most area of thedisplay when a remote trip has been generated.

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Page 5 of 30

Section 3. MENU SYSTEM

Data within the relays is accessed via a menu table. The table is comprised of cells

arranged in rows and columns, like a spreadsheet. A cell may contain text valueslimits or functions. The first cell in a column, the column heading, contains textidentifying the data grouped under it in that column.

3.1 Default display

The selected default display will normally show on the LCD and a momentary pressof the function key [F] will change the display to the heading for the first column,SYSTEM DATA. Further momentary presses of the [F] key will step down thecolumn, row by row, so that data may be read. If at any time the [F] key is pressedand held for one second the cursor will be moved to the top of the next columnand the heading for that column will be displayed. Further momentary presses of

the [F] key will then move down the new column, row by row.Pressing the [F] and [0] keys together and holding for one second can be used tostep back up the menu column. A short press of the [0] key will switch on the backlight for the LCD without changing the display in any way. In this way the full menumay be scanned with just the [F] and [0] keys that are accessible with the relaycover in place, and reset actions can be effected.

Following a protection trip the red trip LED will be lit. The display will changeautomatically from the default display to that of the fault flags for the last fault.Whilst the fault flags are displayed the trip LED can be reset by holding down the[0] for at least one second. The trip LED will be reset and the display will change tothe default display that was last selected. The flag information will not be lost bythis action, it can still be accessed under FAULT RECORDS.

The display will not default to the flag information if the user interface is in use atthe time. The default display will return 15 minutes after the last key press, or it canbe selected more quickly by moving to any column heading and then pressing the[0] key for 1 second. The selected default display will appear unless there hasbeen a fault when the fault flags will be displayed. It is possible to step through theavailable default displays by momentary presses of the reset key [0].

3.2 Accessing the menu

The only settings which can be changed with the cover in place are those that canbe reset either to zero or some preset value. To change any other settings the covermust be removed from the relay to gain access to the [+] and [] keys that are usedto increment or decrement a value. When a column heading is displayed the []key will change the display to the next column and the [+] key will change thedisplay to the previous column, giving a faster selection.

When a cell that can be changed is displayed the action of pressing either the [+]or [] keys will put the relay in setting mode (indicated by a flashing cursor in thedisplay). To escape from the setting mode without making any change the [0] keyshould be depressed for one second. Section 4 gives instructions for changing thevarious types of settings.

Password protection is provided for the configuration settings of the relay because

an accidental change could seriously affect the ability of the relay to perform itsintended functions. Configuration settings include the selection of time curves,function links, VT ratios, opto-input and relay output allocation. Individualprotection settings are protected from change when the relay cover is in place.

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3.3 Menu contents

Related data and settings are grouped in separate columns of the menu.Each column has a text heading (in capital letters) that identifies the data contained

in that column. Each cell may contain text, values, limits and/or a function.The cells are referenced by the column number/row number. For example 0201 iscolumn 02, row 01. When a cell is displayed the four characters at the top lefthand corner of the LCD indicate the column number and row number in the menutable.

The full menu is given in the following tables, but not all of the menu items listedwill be available in a particular relay. Certain settings will disappear from themenu when the user de-selects them; the alternative setting group is a typicalexample, if group 2 settings have not been enabled, ie. the system data link SD4 isset to 0, then the menu columns NEUT DISP 2, UV/OV 2, UF/OF 2 and NEGSEQ 2 will not be visible. Additionally the KVFG 122 can be configured in one of

two modes either as two phase to phase or neutral displacement plus phase-neutralor phase-phase measurement. In the first case no NEUT DISP cells will be visibleand in the later the NEG SEQ cells will not be visible.

3.4 Menu columns

Column Heading DescriptionNumber

00 SYSTEM DATA Settings and data for the system

relay and serial communications

01 FLT RECORDS Fault records for the last five faults

02 MEASURE 1 Directly measured quantities (Va, Vb, Vc, Vo etc.)

03 MEASURE 2 Calculated quantities (V1, V2 etc.)

04 NEUT DISP 1 Neutral displacement protection settings group 1

05 UV/OV 1 Under/overvoltage protection settings group 1

06 UF/OF 1 Under/overfrequency protection settings group 1

07 NEG SEQ 1 Negative sequence protection settings group 1

08 NEUT DISP 2 Neutral displacement protection settings group 2

09 UV/OV 2 Under/overvoltage protection settings group 2

0A UF/OF 2 Under/overfrequency protection settings group 2

0B NEG SEQ 2 Negative sequence protection settings group 2

0C LOGIC Settings for miscellaneous functions used in the logic

0D INPUT MASKS User assigned allocation of logic input

0E RELAY MASKS User assigned allocation of output relays

0F RECORDER Settings for the disturbance recorder

The menu cells that are read only are marked [READ].

Cells that can be set are marked [SET].

Cells that can be reset are marked [RESET].

Cells that are password protected are marked [PWP].

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3.5 System data

Display Status Description

0000 SYSTEM DATA READ Column heading0002 Password PWP Password that must be entered before certain settings

may be changed

0003 SD Links PWP Function links that enable the user to activate optionsrequired

0 Rem ChgStg 1= enable remote setting changes

2 Rem CB Ctrl 1= enable remote control of circuit breaker

3 Rem ChgGrp 1= enable remote change of setting group

4 En Grp2 1= enable group 2 settings to be used and displayed

5 FlagReset 1= enable flags to be reset automatically

7 Log Evts 1= enable logic inputs and output relay status to bestored in event records

8 Aut Rec Rst 1= enable automatic reset for disturbance recorder

9 CBcloseRst 1= enable circuit breaker close pulse to be terminatedby a trip signal

A OP Mode KVFG 122 only0 = selects 3 phase measurement mode

1= selects Vo plus 1 phase to neutral or 1 phase to

phase measurement mode

0004 Description PWP Product description user programmable text

0005 Plant PWP Plant reference user programmable text

0006 Model READ Model number that defines the product

0008 Serial No. READ Serial number unique number identifying theparticular product

0009 Freq SET Default sampling frequency must be set to powersystem frequency

000A Comms Level READ Indicates the Courier communications level supported

by the product

000B Rly Address SET Communication address (1 to 255)

000C Plnt Status READ Binary word used to indicate the status of circuitbreakers and isolators

000D Ctrl Status READ Binary word used to indicate the status of control data

000E Grp Now READ Indicates the active setting group

000F LS Stage READ Indicates the last received load shedding command

0010 CB Control SET Indicates the status of the circuit breaker control

0011 Software READ Software reference for the product0020 Log Status READ Indicates the current status of all the logic inputs

0021 Rly Status READ Indicates the current status of all the output relay drives

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0022 Alarms READ Indicates the current state of internal alarms

0 Uncfg READ Error in factory configuration settings

1 Uncalib READ Operating in uncalibrated state2 Setting READ Error detected in stored settings

3 No Service READ Protection out-of-service and not functioning

4 No Samples READ No A/D samples but still in service

5 No Fourier READ Fourier is not being performed

6 Test Wdog SET Test watchdog by setting this bit to 1

7 CB ops READ CB reached set number of operations

0023 Fnow READ Indicates the current status of the fault flags (these flagsare not latched)

3.6 Fault records


0100 FLT RECORDS READ Column heading

0101 Fault No 1 SET Number of fault record displayed may be selected(Fn to Fn4; Fn4 is the oldest)

0102 Fn G1 READ Flags (latched) indicating the functions that operatedduring the fault

0103 Va READ Phase A voltage measured during the fault

0104 Vb READ Phase B voltage measured during the fault

0105 Vc READ Phase C voltage measured during the fault

0107 V2 READ Highest value of negative sequence voltage duringthe fault

0108 Freq READ Measured frequency during the fault

010A Vab READ Value of Vab during the fault

010B Vbc READ Value of Vbc during the fault

010C Vca READ Value of Vca during the fault

010D Vo READ Highest value of residual voltage measured duringthe fault

0110 Clear = 0 RESET Press [0] key to clear the fault records when this cell isdisplayed

3.7 Measurements 1


0200 MEASURE 1 READ Column heading

0205 Vab READ Measured phase to phase voltage Vab

0206 Vbc READ Measured phase to phase voltage Vbc

0207 Vca READ Measured phase to phase voltage Vca

0208 Va READ Measured phase to neutral voltage Va

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0209 Vb READ Measured phase to neutral voltage Vb

020A Vc READ Measured phase to neutral voltage Vc

020B Vo READ Measured residual voltage Vo020C F READ Measured frequency

3.8 Measurements 2


0300 MEASURE 2 READ Column heading

0305 V1 READ Calculated positive sequence voltage V1

0306 V2 READ Calculated negative sequence voltage V2

0310 CB ops RESET Total number of CB operations

3.9 Neutral displacement 1


0400 NEUT DISP 1 READ Column heading

0401 ND Links PWP Software links to select the optional neutral voltagedisplacement functions

0 1Vo 1= enable stage 1 neutral voltage displacement



3 Vo calc 1= enable Vo calculation and ignore Vo input(KVFG 142 only, unsettable otherwise)

0402 VT Ratio PWP Overall ratio of the voltage transformer feeding therelay

0403 1Vo SET Voltage setting for stage 1 neutral voltage displacement

0404 1VoChar PWP Selected characteristic for stage 1 (definite time orinverse)

0405 1tVo SET Time delay to be used for stage 1

0406 1Vo (tms) SET K factor to be used for stage 1




040A 2Vo (tms) SET K factor to be used for stage 2

040B 3Vo SET Voltage setting for stage 3 neutral voltage displacement

040C 3VoChar PWP Selected characteristic for stage 3 (definite time orinverse)

040D 3tVo SET Time delay to be used for stage 3

040E 3Vo (tms) SET K factor to be used for stage 3

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3.10 Under/overvoltage 1


0500 UV/OV 1 READ Column heading0501 VF Links PWP Software links to select the optional under/overvoltage

functions

0 1V Enable 1= enable stage 1 under/overvoltage protection

1 1V Under 1= stage 1 element used for undervoltage protection;

0 = stage 1 element used for overvoltage protection

2 1V all=1 1= output for all phase below/above stage 1 setting

0 = output for any phases below/above stage 1setting




5 2V all = 1 1= output for all phase below/above stage 2 setting




0 = stage 3 element used for overvoltage protection8 3V all=1 1= output for all phase below/above stage 3 setting


9 4V Enable 1=enable stage 4 under/overvoltage protection

A 4V Under 1=stage 4 element used for undervoltage protection;

0=stage 4 element used for overvoltage protection

B 4V all = 1 1= output for all phase below/above stage 4 setting


C Ph-N = 1 1= use phase to neutral voltages for protection

0 = use phase to phase voltages for protectionThis applies to KVFG 142 and KVFG 122 withSDA = 1

D UV Block 1= enable blocking of all undervoltage elements whenmeasured voltage is below 15V


0503 1V SET Voltage setting for stage 1 under/overvoltageprotection

0504 1V Char PWP Selected characteristic for stage 1 (definite time orinverse)

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0505 1tV SET Time delay to be used for stage 1

0506 1V (tms) SET K factor to be used for stage 1




050A 2V (tms) SET Time delay to be used for stage 2

050B 3V SET Voltage setting for stage 3 under/overvoltageprotection

050C 3V Char PWP Selected characteristic for stage 3 (definite time orinverse)

050D 3tV SET Time delay to be used for stage 3

050E 3V (tms) SET K factor to be used for stage 3

050F 4V SET Voltage setting for stage 4 under/overvoltageprotection




3.11 Under/overfrequency 1


0600 UF/OF 1 READ Column heading

0601 FF Links PWP Software links to select the optional under/overfrequency functions

0 1F Enable 1= enable stage 1 under/overfrequency protection

1 1F Under 1= stage 1 element used for underfrequencyprotection;

0 = stage 1 element used for overfrequencyprotection







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0603 1F SET Frequency setting for stage 1 under/overfrequencyprotection

0604 1tF SET Definite time delay for stage 1






060A 4tF SET Definite time delay for stage 4

3.12 Negative sequence 1


0700 NEG SEQ 1 READ Column heading

0701 NS Links PWP Software links to select the optional negative sequencevoltage functions

0 1V2 1= enable stage 1 negative sequence overvoltage


2 V2 Block 1= block close pulse when negative sequence voltageabove V2 Cl Bl setting

0702 1V2 SET Voltage setting for stage 1 negative sequenceovervoltage

0703 1V2Char PWP Selected characteristic for stage 1 (definite time or

inverse)

0704 1tV2 SET Time delay to be used for stage 1

0705 1V2 (tms) SET K factor to be used for stage 1

0706 2V2 SET Voltage setting for stage 2 negative sequenceovervoltage

0707 2V2Char PWP Selected characteristic for stage 2 (definite time orinverse)

0708 2tV2 SET Time delay to be used for stage 2

0709 2V2 (tms) SET K factor to be used for stage 2

070A V2 Cl Bl SET Negative sequence voltage threshold to block a closepulse

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3.13 Neutral displacement 2


0800 NEUT DISP 2 READ Column heading0801 ND Links PWP Software links to select the optional neutral voltage

displacement functions




3 Vo calc 1= enable Vo calculation and ignore Vo input(KVFG 142 only, unsettable otherwise)

0802 VT Ratio PWP Overall ratio of the voltage transformer feeding the

relay0803 1Vo SET Voltage setting for stage 1 neutral voltage displacement



0806 1Vo (tms) SET K factor to be used for stage 1




080A 2Vo (tms) SET K factor to be used for stage 2

080B 3Vo SET Voltage setting for stage 3 neutral voltage displacement

080C 3VoChar PWP Selected characteristic for stage 3 (definite time orinverse)

080D 3tVo SET Time delay to be used for stage 3

080E 3Vo (tms) SET K factor to be used for stage 3

3.14 Under/overvoltage 2


0900 UV/OV 2 READ Column heading

0901 VF Links PWP Software links to select the optional under/overvoltagefunctions




2 1V all =1 1= output for all phase below/above stage 1 setting



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5 2V all=1 1= output for all phase below/above stage 2 setting0 = output for any phases below/above stage 2setting




8 3V all=1 1= output for all phase below/above stage 3 setting



A 4V Under 1= stage 4 element used for undervoltage protection;


B 4V all=1 1= output for all phase below/above stage 4 setting


C Ph-N=1 1= use phase to neutral voltages for protection

0 = use phase to phase voltages for protection

This applies to KVFG 142 and KVFG 122 withSDA = 1

D UV Block 1= enable blocking of all undervoltage elements whenmeasured voltage is below 15V









090A 2V (tms) SET K factor to be used for stage 2

090B 3V SET Voltage setting for stage 3 under/overvoltageprotection

090C 3V Char PWP Selected characteristic for stage 3 (definite time orinverse)

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090D 3tV SET Time delay to be used for stage 3

090E 3V (tms) SET K factor to be used for stage 3

090F 4V SET Voltage setting for stage 4 under/overvoltageprotection




3.15 Under/overfrequency 2


0A00 UF/OF 2 READ Column heading

0A01 FF Links PWP Software links to select the optional under/overfrequency functions













0A03 1F SET Frequency setting for stage 1 under/overfrequencyprotection

0A04 1tF SET Definite time delay for stage 1




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0A0A 4tF SET Definite time delay for stage 4

3.16 Negative sequence 2


0B00 NEG SEQ 2 READ Column heading

0B01 NS Links PWP Software links to select the optional negative sequencevoltage functions



2 V2 Block 1= block close pulse when negative sequence voltageabove V2 Cl Bl setting

0B02 1V2 SET Voltage setting for stage 1 negative sequenceovervoltage

0B03 1V2Char PWP Selected characteristic for stage 1 (definite time orinverse)

0B04 1tV2 SET Time delay to be used for stage 1

0B05 1V2 (tms) SET K factor to be used for stage 1

0B06 2V2 SET Voltage setting for stage 2 negative sequenceovervoltage

0B07 2V2Char PWP Selected characteristic for stage 2 (definite time orinverse)

0B08 2tV2 SET Time delay to be used for stage 2

0B09 2V2 (tms) SET K factor to be used for stage 2

0B0A V2 Cl Bl SET Negative sequence voltage threshold to block a closepulse

3.17 Logic

Display Status Description0C00 LOGIC READ Column heading

0C01 LOG Links PWP Software links to select the available optional logicfunctions

3 Aux2=DPU 1= enable tAUX2 as a delay on pick-up timer

0 = enable tAUX2 as a delay on drop off timer

5 Aux3=DPU 1= enable tAUX3 as a delay on pick-up timer

0=enable tAUX3 as a delay on drop off timer

6 Rly 7 Flags 1= enable output relay 7 to latch flags, generate fault& event records and CB ops

7 CB Rec 1=enable CB operations register to be incremented

0C02 tAUX1 SET Auxiliary timer 1 setting

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0C05 tTRIP SET Trip pulse time setting0C06 tCLOSE SET Close pulse time setting

0C07 CB Ops> SET Alarm 1 setting for excessive circuit breaker operations

0C0F Display SET Default display that is selected on power-up

0 Manufacturer Manufacturers name

1 Description Description of product

2 Plant Ref Plant reference

3 3 Ph-Ph 3 phase-phase voltages

4 Ph-Ph ND F A B phase-phase, neutral displacement andfrequency

5 Ph-N ND F A N phase-neutral, neutral displacement andfrequency

6 3Ph-Ph ND 3 phase-phase voltages and neutral displacement

7 3Ph-N ND 3 phase-neutral voltages and neutral displacement

8 PSV NSV F Positive sequence voltage, negative sequencevoltage and frequency

9 MAX MIN Mod2 Max phase-phase voltage, min phase-phase voltage,

Max phase-neutral voltage and min phase-neutralvoltage

10 MAX MIN Mod1 Max phase-phase voltage and min phase-phasevoltage

11 Alarm Status Alarm status

3.18 Input masks


0D00 INPUT MASKS READ Column heading

0D01 Blk 1tVo PWP Logic input to block first stage neutral voltage

displacement timer0D02 Blk 2tVo PWP Logic input to block second stage neutral voltage

displacement timer

0D03 Blk 3tVo PWP Logic input to block third stage neutral voltagedisplacement timer

0D04 Blk 1tV PWP Logic input to block first stage under/overvoltage timer

0D05 Blk 2tV PWP Logic input to block second stage under/overvoltagetimer

0D06 Blk 3tV PWP Logic input to block third stage under/overvoltage timer

0D07 Blk 4tV PWP Logic input to block fourth stage under/overvoltagetimer

0D08 Blk 1tF PWP Logic input to block first stage under/overfrequencytimer

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0D09 Blk 2tF PWP Logic input to block second stage under/overfrequencytimer

0D0A Blk 3tF PWP Logic input to block third stage under/overfrequency

timer

0D0B Blk 4tF PWP Logic input to block fourth stage under/overfrequencytimer

0D0C Blk 1tV2 PWP Logic input to block first stage negative sequenceovervoltage timer

0D0D Blk 2tV2 PWP Logic input to block second stage negative sequenceovervoltage timer

0D0E L Trip PWP Logic input to initiate trip pulse timer from external input

0D0F L Close PWP Logic input to initiate close pulse timer from external

input

0D10 Ext Trip PWP Logic input to initiate records from an external tripsignal

0D11 Aux 1 PWP Logic input to initiate timer tAUX1 from external input



0D14 Set Grp 2 PWP Logic input to select group 2 protection settings fromexternal input

0D15 CB Closed PWP Logic input to indicate circuit breaker in closed position

0D16 CB Open PWP Logic input to indicate circuit breaker in open position

0D17 Bus2 PWP Logic input to indicate circuit breaker in bus 2 position

3.19 Relay masks


0E00 RELAY MASKS READ Column heading

0E01 1tVo PWP First stage time delayed neutral voltage displacementoutput

0E02 2tVo PWP Second stage time delayed neutral voltage

displacement output

0E03 3tVo PWP Third stage time delayed neutral voltage displacementoutput

0E04 1tVa(-b) PWP First stage time delayed under/overvoltage output forphase A (-B)

0E05 1tVb(-c) PWP First stage time delayed under/overvoltage output forphase B (-C)

0E06 1tVc(-a) PWP First stage time delayed under/overvoltage output forphase C (-A)

0E07 2tVa(-b) PWP Second stage time delayed under/overvoltage outputfor phase A (-B)

0E08 2tVb(-c) PWP Second stage time delayed under/overvoltage outputfor phase B (-C)

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0E09 2tVc(-a) PWP Second stage time delayed under/overvoltage outputfor phase C (-A)

0E0A 3tVa(-b) PWP Third stage time delayed under/overvoltage output for

phase A (-B)

0E0B 3tVb(-c) PWP Third stage time delayed under/overvoltage output forphase B (-C)

0E0C 3tVc(-a) PWP Third stage time delayed under/overvoltage output forphase C (-A)

0E0D 4tVa(-b) PWP Fourth stage time delayed under/overvoltage output forphase A (-B)

0E0E 4tVb(-c) PWP Fourth stage time delayed under/overvoltage output forphase B (-C)

0E0F 4tVc(-a) PWP Fourth stage time delayed under/overvoltage output forphase C (-A)

0E10 1tF PWP First stage time delayed under/overfrequency output

0E11 2tF PWP Second stage time delayed under/overfrequency output

0E12 3tF PWP Third stage time delayed under/overfrequency output

0E13 4tF PWP Fourth stage time delayed under/overfrequency output

0E14 1tV2 PWP First stage time delayed negative sequence overvoltageoutput

0E15 2tV2 PWP Second stage time delayed negative sequence

overvoltage output

0E16 CB Trip PWP Trip pulse output

0E17 CB Close PWP Close pulse output

0E18 Aux1 PWP Output from the auxiliary 1 time delayed function

0E19 Aux2 PWP Output from the auxiliary 2 time delayed function

0E1A Aux3 PWP Output from the auxiliary 3 time delayed function

0E1B Level 1 PWP Output in response to command to load shed to level 1

0E1C Level 2 PWP Output in response to command to load shed to level 2

0E1D Level 3 PWP Output in response to command to load shed to level 3

0E1E CB Alarm PWP Alarm for circuit breaker maintenance

3.20 Recorder


0F00 RECORDER READ Column heading

0F01 Control SET Manual stop/start control (Running = started; triggered= stopped)

0F02 Capture SET Select the functions to be captured: Magnitudes/phase

angles/samples0F03 Post Trigger SET Select the number of samples recorded after the trigger

(1 to 511)

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0F04 Logic Trig SET Select the logic input to trigger the recorder(0 to 7 pick-up or drop-off)

0 +Opto0 Trigger in response to energisation of logic input L0








8 -Opto0 Trigger in response to de-energisation of logic input L0

9 -Opto1 Trigger in response to de-energisation of logic input L1

A -Opto2 Trigger in response to de-energisation of logic input L2

B -Opto3 Trigger in response to de-energisation of logic input L3

C -Opto4 Trigger in response to de-energisation of logic input L4

D -Opto5 Trigger in response to de-energisation of logic input L5

E -Opto6 Trigger in response to de-energisation of logic input L6

F -Opto7 Trigger in response to de-energisation of logic input L7

0F05 Relay Trig SET Select the output relay to trigger the recorder(0 to 7 pick-up or drop-off)

0 +Rly 0 Trigger in response to energisation of output relay RLY 0








8 -Rly 0 Trigger in response to de-energisation of output relay RLY 0

9 -Rly 1 Trigger in response to de-energisation of output relay RLY 1

A -Rly 2 Trigger in response to de-energisation of output relay RLY 2

B -Rly 3 Trigger in response to de-energisation of output relay RLY 3

C -Rly 4 Trigger in response to de-energisation of output relay RLY 4

D -Rly 5 Trigger in response to de-energisation of output relay RLY 5

E -Rly 6 Trigger in response to de-energisation of output relay RLY 6

F -Rly 7 Trigger in response to de-energisation of output relay RLY 7

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Section. 4 CHANGING TEXT AND SETTINGS

Settings and text in certain cells of the menu can be changed via the user interface.

To do this the cover must be removed from the front of the relay so that the [+] and[] keys can be accessed.

4.1 Quick guide to menu controls

Quick guide to menu control with the four keys

Current display Key press Effect of action

Default display [0] long Backlight turns ON no other effect

[0] short Steps through the available default displays

[F] steps down to column heading SYSTEMDATA

[+] Back-light turns ON no other effect

[] Back-light turns ON no other effect

Fault flags after a trip [0] short Back-light turns ON no other effect

[F] steps down to column heading SYSTEMDATA without resetting the fault flags

[0] long resets trip LED and returns default display

[+] Back-light turns ON no other effect

[] Back-light turns ON no other effectColumn heading [0] short Back-light turns ON no other effect

[0] long Re-establishes password protectionimmediately and returns the default display

[F] long move to next column heading

[F] short steps down the menu to the next item inthe column

[] move to next column heading

[+] move to previous column heading

Any menu cell [F] short steps down the menu to the next item inthe column

[F] long displays the heading for the next column

[F] + [0] steps back up the menu to the previousitem

[0] short Back-light turns ON no other effect

[0] long Resets the value if the cell is resettable

Any settable cell [+] or [] Puts the relay in setting mode. Thepassword must first be entered for protectedcells

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Current display Key press Effect of action

Setting mode [0] Escapes from the setting mode without a

setting change[+] Increments value with increasing rapidity

if held

[] Decrements value with increasing rapidityif held

[F] Changes to the confirmation display

[F] If function links, relay or input masks aredisplayed the [F] key will step through themfrom left to right and finally changing to theconfirmation display

Confirmation mode [+] Confirms setting and enters new setting ortext

[] Returns prospective change to check/modify

[0] Escapes from the setting mode without asetting change

The actions shown in the shaded area can only be performed when the cover is removed.

[F] long means press F key and hold for longer than 1s

[F] short means press F key and hold for less than 1s

[F] means press the F key length of time does not change the response

4.2 To enter setting mode

Give the [F] key a momentary press to change from the selected default displayand switch on the back-light; the heading SYSTEM DATA will be displayed.

Use the [+] and [] keys, or a long press of the [F] key, to select the columncontaining the setting, or text that is to be changed. Then with the [F] key stepdown the column until the contents of that cell are displayed. Press the [+] key toput the relay into the setting mode. Setting mode will be indicated by a flashingcursor on the bottom line of the display. If the cell is read-only, or passwordprotected, then the cursor will not appear and the relay will not be in the settingmode.

4.3 To escape from the setting mode

IMPORTANT! If at any time you wish to escape from the setting mode withoutmaking a change to the contents of the selected cell: Hold the [0]key depressed for 1s, the original setting will be returned and therelay will exit the setting mode.

4.4 To accept the new setting

Press the [F] key until the confirmation display appears:

Are you sure?+ = YES = NO

Press the [0] key if you decide not to make any change.

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Press the [] key if you want to further modify the data before entry.

Press the [+] key to accept the change. This will terminate the setting mode.

4.5 Password protectionPassword protection is provided for the configuration settings of the relay.

This includes time characteristic selection, VT ratios, function links, input masks andrelay masks. Any accidental change to configuration could seriously affect theability of the relay to perform its intended functions, whereas, a setting error mayonly cause a grading problem. Individual settings are protected from change whenthe relay cover is in place by preventing direct access to the [+] and [] keys.

The password consists of four characters that may contain any upper case letterfrom the alphabet. The password is initially set in the factory to AAAA, but it canbe changed by the user to another combination if necessary. If the password is lost

or forgotten, access to the relay will be denied. However, if the manufacturer ortheir agent is supplied with the serial number of the relay, a back-up password canbe supplied that is unique to that particular product.

4.6 Entering passwords

Using the [F] key, select the password cell [0002] in the SYSTEM DATA column ofthe menu. The word Password is displayed and four stars. Press the [+] key andthe cursor will appear under the left hand star. Now use the [+] key to step throughthe alphabet until the required letter is displayed. The display will increment fasterif the key is held down and the [] key can be used in a similar way to movebackwards through the alphabet. When the desired character has been set the [F]key can be given a momentary press to move the cursor to the position for the nextcharacter. The process is then repeated to enter the remaining characters thatmake up the password. When the fourth character is acknowledged by amomentary press of the [F] key the display will read:

Are you sure?

+ = YES = NO

Press the [0] key if you decide not to enter the password.

Press the [] key if you want to modify the entry.

Press the [+] to enter the password.

The display will then show four stars and if the password was accepted the alarmLED will flash. If the alarm LED is not flashing the password was not accepted afurther attempt can be made to enter it, or the [F] key pressed to move to the nextcell.

Note: When the password cell is displayed, do not press the [+] or [] key whilstthe alarm LED is flashing unless you want to change the password!

4.7 Changing passwords

When the password has been entered and the alarm LED is flashing the [+] key ispressed to put the relay in setting mode. A new password can now be entered asdescribed in Section 4.6. After entering the fourth character make a note of the

new password shown on the display before pressing the [F] key to obtain theconfirmation display.

Are you sure?

+ = YES = NO

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Press the [0] key if you decide not to enter the new password.

Press the [] key if you want to modify your entry.

Press the [+] to enter the new password (which will then replace the old one).Note: Make sure the new password has been written down before it is entered

and that the password being entered agrees with the written copy beforeaccepting it. If the new password is not entered correctly you may bedenied access in the future. If the password is lost a backup passwordunique to that relay can be provided from the factory, or certain agents, ifthe serial number of the product is quoted.

4.8 Restoration of password protection

Password protection is reinstated when the alarm LED stops flashing. This will occurfifteen minutes after the last key press. To restore the password protection without

waiting for the fifteen minute time-out, select the password cell or any columnheading and hold the reset key [0] depressed for 1s. The alarm LED will cease toflash to indicate the password protection is restored.

4.9 Entering text

Enter the setting mode as described in Section 4.2 and move the cursor with the [F]key to where the text is to be entered or changed. Then using the [+] and [] keys,select the character to be displayed. The [F] key may then be used to move thecursor to the position of the next character and so on. Follow the instructions inSection 4.4 to exit from the setting change.

4.10 Changing function links

Select the column heading required and step down to the function links SD Links,ND Links, VF Links, FF Links, NS Links or LOG links and press either the[+] or [] key to put the relay in a setting change mode. A cursor will flash on thebottom line at the extreme left position. This is link F; as indicated by thecharacter printed on the frontplate under the display.

Press the [F] key to step along the row of links, one link at a time, until some textappears on the top line that describes the function of a link. The [+] key willchange the link to a 1 to select the function and the [] key will change it to a0 to deselect it. Follow the instructions in Section 4.4 to accept the settingchange.

Not all links can be set, some being factory selected and locked. The links that arelocked in this way are usually those for functions that are not supported by aparticular relay, when they will be set to 0. Merely moving the cursor past a linkposition does not change it in any way.

4.11 Changing setting values

Move through the menu until the cell that is to be edited is displayed. Press the [+]or [] key to put the relay into the setting change mode. A cursor will flash in theextreme left hand position on the bottom line of the display to indicate that therelay is ready to have the setting changed. The value will be incremented in singlesteps by each momentary press of the [+] key, or if the [+] key is held down the

value will be incremented with increasing rapidity until the key is released.Similarly the [] key can be used to decrement the value. Follow the instructions inSection 4.4 to exit from the setting change.

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Note: When entering VT RATIO the overall ratio should be entered,ie. 11kV/110V VT has an overall ratio of 100:1. With rated voltageapplied the relay will display 110V when the VT RATIO has the default

value of 1:1 and when the ratio is set to 100:1 the displayed value will be100 x 110V = 11kV.

4.12 Setting communication address

The communication address will be set to 255, the global address to all relays onthe network, when the relay is first supplied. Reply messages are not issued fromany relay for a global command, because they would all respond at the same timeand result in contention on the bus. Setting the address to 255 will ensure thatwhen first connected to the network they will not interfere with communications onexisting installations. The communication address can be manually set by selectingthe appropriate cell for the SYSTEM DATA column, entering the setting mode asdescribed in Section 4.2 and then decrementing or incrementing the address.

Then exit setting mode as described in Section 4.4.

To automatically allocate an address to the relay, see Chapter 6.

4.13 Setting input masks

An eight bit mask is allocated to each protection and control function that can beinfluenced by an external input applied to one or more of the logic inputs.

When the menu cell for an input mask is selected the top line of the display showstext describing the function to be controlled by the inputs selected in the mask.

A series of 1s and 0s on the bottom line of the display indicates which logic

inputs are selected to exert control. The numbers printed on the frontplate under thedisplay indicate each of the logic inputs (L7 to L0) being displayed.

A 1 indicates that a particular input is assigned to the displayed control functionand a 0 indicates that it is not. The same input may be used to control more thanone function.

4.14 Setting output masks

An eight bit mask is allocated to each protection and control function. When amask is selected the text on the top line of the display indicates the associatedfunction and the bottom line of the display shows a series of 1s and 0s for theselected mask. The numbers printed on the frontplate under the display indicate the

output relay (RLY7 to RLY0) to which each bit is associated. A 1 indicates that therelay will respond to the displayed function and a 0 indicates that it will not.

A logical OR function is performed on the relay masks so that more than onerelay may be allocated to more than one function. An output mask may be set tooperate the same relay as another mask so that, for example, one output relaymay be arranged to operate for all the functions required to trip the circuit breakerand another for only those functions that are to initiate autoreclose.

4.15 Resetting values and records

Some values and records can be reset to zero, or some predefined value.

To achieve this the menu cell must be displayed and then the [0] key helddepressed for at least one second to effect the reset. The fault records are slightlydifferent because they are a group of settings and to reset these the last cell under

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FLT RECORDS must be selected. This will display:

Clear = [0]

To reset ALL FIVE fault records hold the [0] key depressed for more than 1s. If therecords are not cleared the oldest record will be overwritten by the next fault.

4.16 Resetting trip LED indication

The trip LED can be reset when the flags for the last fault are displayed. They aredisplayed automatically after a trip occurs, or can be selected in the fault recordcolumn. The reset is effected by depressing the [0] key for 1s. Resetting the faultrecords as described in 4.15 will also reset the trip LED indication.

If link SD5 is set to 1 the trip LED can be reset by energising a logic input thathas been allocated in the input mask [OD11 tAUX1]. If link SD8 is also set to 1then the trip LED will reset when the disturbance recorder has been triggered and

the delay set for tAUX1 has expired.4.17 Selecting default display

The selection of the default display from the cell 0C0F Display has the followingoptions, Manufacturer, Description, Plant Ref, 3 Ph-Ph, Ph-Ph ND F,Ph N ND F, 3Ph-Ph ND, 3Ph N ND, PSV NSV F, MAX MIN Mod2,MAX MIN Mod1 and Alarms.

However, depending on the relay type and configuration, not all the options canbe displayed as default. If an option is selected but cannot be displayed, thedefault display will be the next available selection. The following tabledemonstrates which default display is shown when each default selection is made.

KVFG 142 KVFG 122 KVFG 122

3Ph Vo plus Vo plusmeasurements other other

Ph-Ph Ph-Ph Ph-N

Selection Display Display Display Display

Manufacturer Manufacturer Manufacturer Manufacturer Manufacturer

Description Description Description Description Description

Plant Ref Plant Ref Plant Ref Plant Ref Plant Ref

3 Ph-Ph 3Ph-Ph ND 3 Ph-Ph Ph-Ph ND F Ph-Ph ND FPh-Ph ND F 3Ph-Ph ND PSV NSV F Ph-Ph ND F Ph-N ND F

Ph-N ND F 3Ph-Ph ND PSV NSV F Alarm Status Ph-N ND F

3Ph-Ph ND 3Ph-Ph ND PSV NSV F Alarm Status Alarm Status

3Ph-N ND 3Ph-N ND PSV NSV F Alarm Status Alarm Status

PSV NSV F PSV NSV F PSV NSV F Alarm Status Alarm Status

MAX MIN Mod2 MAX MIN Mod2 MAX MIN Mod1 Alarm Status Alarm Status

MAX MIN Mod1 Alarm Status MAX MIN Mod1 Alarm Status Alarm Status

Alarm Status Alarm Status Alarm Status Alarm Status Alarm Status

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Section. 5 EXTERNAL CONNECTIONS

Standard connection table KVFG 142

Function Terminals Function

Earth terminal 1 2 Not used

Watchdog relay break 3 4 make Watchdog relay

(break contact) 5 6 (make contact)

48V field voltage [+] 7 8 [] 48V field voltage

Not used 9 10 Not used


Auxiliary voltage input (+) 13 14 () Auxiliary voltage input


A phase voltage IN 17 18 IN B phase voltage

C phase voltage IN 19 20 OUT Phase voltage ref.

Residual vol

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