Manual Aegis f a 00

C R O M P T O N G R E A V E S L I M I T E D

FEEDER PROTECTION RELAY


CROMPTON GREAVES LIMITED MV Switchgear Division (S2) A-3 MIDC, Ambad, Nashik 422 010 T: +91- 2382271-75, 2301104 Fax: +91-0253-2381247

Operating Manual

For

Feeder Protection Relay


REVISION HISTORY

Note: The features mentioned may not be a part of standard product. Product development is a continuous process. Consequently the data indicated is subject to change without prior notice.

Revision Type Date Checked By Approved By

00 AEGIS 01-12-2011 NS GPB


Dear Customer, Please accept our thanks for giving us the privilege to serve you by choosing a CG make

‘Feeder Protection Relay’. If this is your first CG Protection Relay, we hope it is the beginning of a long relationship

which delivers value to your organization. If you already own and use a CG product, we

are doubly honored by your decision of continuing this relationship.

It is our constant endeavor to partner you for the growth and success of your business.

This philosophy is reflected in our Mission statement “Smart Solutions. Strong

Relationships”. Please do give us feedback to help us realize our Mission.

CROMPTON GREAVES LIMITED


IMPORTANT This manual contains information concerning the Operation of the AEGIS Series Feeder Protection Relay for the Switchgear Systems. All relevant parts of the manual should be read prior to commencing installation. The Relay must be commissioned by an engineer approved by the manufacturer (or his agent) before being put into service. Failure to observe this condition will invalidate any implied warranty. The AEGIS Series Feeder Protection Relay has been designed for Industrial use only. If you encounter any problem with the procedures contained in this manual you should seek immediate assistance from Crompton Greaves Limited, Sales Office from whom the equipment was purchased. Alternatively contact the Crompton Greaves Limited Customer Service & Support department at the address shown below:

Crompton Greaves Limited MV Switchgear Division (S2)

A-3 MIDC, Ambad, Nashik 422 010 , India

Phone : (00 91 253) 2382271-75

2301104

Fax : (00 91 253) 2381247 Crompton Greaves Limited pursues a policy of continual product development and

reserves the right to change the equipment without notice.

@ Copyright 2011 by Crompton Greaves Ltd.

Unauthorized reproduction prohibited All rights reserved


Disclaimer

The information in this document is subject to change without notice and should not be interpreted as assurance by CG. CG assumes no responsibility for any errors that may appear in this document.

@ Copyright 2010 by Crompton Greaves Ltd.

Unauthorized reproduction prohibited All rights reserved


Table Of Contents

1. General 1

1.1. Relay Features 1 1.2. User Interface 2 1.3. Health & Safety 2

1.3.1. Installing, Commissioning & Servicing 3 1.3.2. Decommissioning & Disposal 4 1.3.3. General Considerations 5 1.3.4. Handling of Electronic Equipment 5 1.3.5. Storage 6

2. Local Panel User Interface 7

2.1. Relay Front Panel 7

2.1.1. LED Indications 8 2.1.2. LCD Display 9 2.1.3. Keypad 10 2.1.4. Communication Port 10 2.1.5. Flowchart for Menu Navigation 10

3. Relay Settings 16

3.1. Device Info View 16 3.2. Password Accessing 16 3.3. Error Status View 17 3.4. Measurements View 18 3.5. Harmonics View 20 3.6. Configuration Settings 21 3.7. Non Directional Overcurrent Protection 22

3.7.1. IDMT Settings 22 3.7.2. Highset Settings 22

3.8. Non Directional Earth Fault Protection 24 3.8.1. IDMT Settings 24 3.8.2. Highset Settings 25

3.9. Directional Overcurrent Protection 26 3.9.1. IDMT Settings 26 3.9.2. Highset Settings 26 3.9.3. Directional Settings 26

3.10. Directional Earth Fault Protection 29 3.10.1. IDMT Settings 29 3.10.2. Highset Settings 29 3.10.3. Directional Settings 29


3.11. Overvoltage Protection 31 3.11.1. IDMT Settings 31 3.11.2. Highset Settings 32

3.12. Undervoltage Protection 33 3.12.1. IDMT Settings 33 3.12.2. Highset Settings 34

3.13. Neutral Voltage Displacement Protection 35 3.14. Broken Conductor Protection 37 3.15. Cold Load Pick up & Inrush Current Protection 38 3.16. CT Supervision 40 3.17. VT Fuse Failure protection 41 3.18. Negative Phase Sequence Over Current Protection 43 3.19. Communication Settings 44 3.20. Binary Input & Binary Output Settings 45 3.21. Fault Records 46 3.22. Fault Records Overview 47 3.23. Disturbance Recorder 48

4. Technical Data 49

4.1. Connections 49

4.1.1. Measuring Circuitry 49 4.1.2. Auxiliary Voltage 49 4.1.3. Binary Inputs 50 4.1.4. Binary Outputs 50 4.1.5. Local Serial Communication Port 50 4.1.6. Remote Control Connections 50

4.2. Test & Environmental Conditions 51 4.2.1. Type Test 51 4.2.2. Casing 52 4.2.3. Package 52

4.3. Protection Stages 53 4.3.1. Non Direction Current Protection Stage 53 4.3.2. Directional Current Protection Stage 55 4.3.3. Voltage Protection Stage 57

4.4. Circuit Breaker Failure Protection 58 4.5. Supporting Functions 59 4.6. Transformer Supervision 60

5. Connections 61

5.1. Rear Port Connections 61 5.2. Wiring Diagram 64

6. Dimensions 65


7. Curves 66

7.1. Standard IDMT Characteristic of Overcurrent 66 7.2. Standard Characteristic of Overvoltage 72 7.3. Standard Characteristic of Undervoltage 72 7.4. Standard Characteristic of Negative Phase Sequence Overcurrent 72

8. Ordering Information 73 9. Customer Settings 74

10. Notes 81


List of Figures

1. Figure 2.1-1 Front panel of feeder protection relay 7 2. Figure 2.1.1-1 LED indicators of feeder protection relay 8 3. Figure 2.1.2-1.LCD display of feeder protection relay 9 4. Figure 2.1.3-1 Keypad of feeder protection relay 10 5. Figure 2.1.5-1 Principle of the menu structure & navigation 11 6. Figure 3.1-1 Device info view 16 7. Figure 3.2-1 Password accessing 16 8. Figure 3.3-1 Error status view 17 9. Figure 3.4-1 Measurements view 18 10. Figure 3.4-2 Graphical representation of 3 phase system 19 11. Figure 3.4-3 Zoom view of measurement window 19 12. Figure 3.5-1 Example of harmonics view 20 13. Figure 3.6-1 Configuration settings 21 14. Figure 3.7-1 Non directional overcurrent settings 23 15. Figure 3.8-1 Non directional earth fault settings 24 16. Figure 3.9-1 Directional overcurrent settings 28 17. Figure 3.10-1 Directional earth fault settings 30 18. Figure 3.11-1 Overvoltage protection settings 31 19. Figure 3.12-1 Undervoltage protection settings 33 20. Figure 3.13-1 NDR protection settings 35 21. Figure 3.14-1 Broken conductor settings 37 22. Figure 3.15-1 Inrush protection settings 39 23. Figure 3.16-1 CT supervision settings 40 24. Figure 3.17-1 Logical diagram for VTFF 41 25. Figure 3.17-2 VTFF settings 42 26. Figure 3.18-1 Negative phase sequence over current settings 43 27. Figure 3.19-1 Communication settings 44 28. Figure 3.20-1 Binary inputs & outputs settings 45 29. Figure 3.21-1 Fault records view 46 30. Figure 3.22-1 Fault records overview 47 31. Figure 3.23-1 Disturbance recorder 48 32. Figure 5.1-1 Rear view of feeder protection relay 61 33. Figure 5.2-1 Wiring diagram for feeder protection relay (AE001) 64 34. Figure 6-1 Dimensions 65 35. Figure 7.1-1 IEC VI & SI curves characteristics 67 36. Figure 7.1-2 IEC EI & LTI curves characteristics 68 37. Figure 7.1-3 IEEE EI & VI curves characteristics 69 38. Figure 7.1-4 IEEE SI curves characteristics 70 39. Figure 7.1-5 RI & RD curves characteristics 71


ABBREVIATIONS AND SYMBOLS ANSI American National Standards Institute AWG American Wire Gauge BI Binary Input BO Binary Output BR.C Broken Conductor CBFP Circuit Breaker Failure Protection COMM Communication CONF Configuration CT Current Transformer CTSV Current Transformer Supervision D-EF Directional Earth Fault D-OC Directional Over Current DR Disturbance Recorder DT Definite Time EF Earth Fault ESD Electrostatic Discharge FL-R Fault Record FWD Forward HRMN Harmonics I2> Negative Phase sequence over current IDMT Inverse Definite Minimal Time IEC International Electrotechnical Commission IEEE Institute of Electrical and Electronics Engineers INFO Information INRH Inrush Current KVA Kilo Volt Ampere KVAR Kilo Volt Ampere Reactive KW Kilo Watt LCD Liquid Crystal Display LED Light Emitting Diode MESR Measurements NDR Neutral Voltage Displacements NV No Volt OC Over Current OV Over Voltage PF Power Factor PROT Protection REV Reverse SCADA Supervisory Control and Data Acquisition THD Total Harmonic Distortion USB Universal Serial Bus UV Under Voltage VT Voltage Transformer VTFF Voltage Transformer Fuse Failure


PAGE 1

1. GENERAL

The first part of the publication contains general description & operating instructions

of AEGIS Series Feeder Protection Relay. It also includes instructions for parameterization and configuration of the Relay.

1.1. RELAY FEATURES The comprehensive protection functions of the relay make it ideal for utility & industrial power distribution applications. The relay features following protection functions:

ANSI No. FUNCTION NAME

PR

OTE

CTI

ON

FU

NC

TIO

NS

50/51 Instantaneous and Inverse time phase over current protection 51,51N Instantaneous and Inverse time Earth fault protection

67 Directional Instantaneous and Inverse time phase over current protection

67N Directional Instantaneous and Inverse time Earth fault protection

27 Instantaneous and Inverse time phase under voltage protection 59 Instantaneous and Inverse time phase over voltage protection

59N Neutral Displacement Protection 46 Phase unbalance Protection

50BF Circuit Breaker failure Protection 46BC Broken conductor detection Protection

68 Cold load Pickup & Inrush 51V Voltage Controlled Over Current* 32 Reverse Power Protection* 40 Loss of Excitation* 79 Auto Reclose*

MEA

SUR

EMEN

TS &

MO

NIT

OR

ING

FU

NC

TIO

NS

60CTS CT Supervision PTFF Supervision

74TCS Trip Circuit Supervision Three Phase Current Neutral current Sequence Components of Currents Sequence Components of voltages Phase to earth, Phase to Phase Voltage Phase Angle

55 Power factor Active Power Reactive Power Apparent Power Energy Measurement* 2nd to 15th harmonic and THD of Currents 2nd to 15th harmonic and THD of Voltages Phasor diagram of Voltages Phasor diagram of Currents Frequency Actual RMS value of Currents Actual RMS value of Voltages

CO

MM

UN

ICA

TIO

N

FUN

CTI

ON

S

IEC 60870-5-103

Modbus

IEC61850

DNP3.0


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1.2. USER INTERFACE The relay can be configured in two ways We can operate the relay locally by the key pad on the front panel By using the front USB on the relay through PC

1.3. HEALTH & SAFETY The information in the Safety Section of the equipment documentation is intended to ensure that equipment is properly installed and handled in order to maintain it in a safe condition. It is assumed that everyone who will be associated with the equipment will be familiar with the contents of that Safety Section, or this Safety Guide. When electrical equipment is in operation, dangerous voltages will be present in certain parts of the equipment. Failure to observe warning notices, incorrect use, or improper use may endanger personnel and equipment and cause personal injury or physical damage. Before working in the terminal strip area, the equipment must be isolated. Proper and safe operation of the equipment depends on appropriate shipping and handling, proper storage, installation and commissioning, and on careful operation, maintenance and Servicing. For this reason only qualified personnel may work on or operate the equipment.

Qualified personnel are individuals who are familiar with the installation, commissioning, and operation of the equipment

and of the system to which it is being connected; are able to safely perform switching operations in accordance with accepted safety

engineering practices and are authorised to energize and de-energize equipment and to isolate, ground, and label it;

are trained in the care and use of safety apparatus in accordance with safety Engineering practices;

are trained in emergency procedures (first aid). The operating manual for the equipment gives instructions for its installation, commissioning, and operation. However, the manual cannot cover all conceivable circumstances or include detailed information on all topics. In the event of questions or specific problems, do not take any action without proper authorization.


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1.3.1. INSTALLING,COMMISSIONING & SERVICING

Equipment connection

Personnel undertaking installation, commissioning or servicing work for this equipment should be aware of the correct working procedures to ensure safety. The equipment documentation should be consulted before installing, commissioning or servicing the equipment. Terminals exposed during installation, commissioning and maintenance may present a hazardous voltage unless the equipment is electrically isolated. Any disassembly of the equipment may expose parts at hazardous voltage, also electronic parts may be damaged if suitable electrostatic voltage discharge (ESD) precautions are not taken. If there is unlocked access to the rear of the equipment, care should be taken by all personnel to avoid electric shock or energy hazards. Voltage and current connections should be made using insulated crimp terminations to ensure that terminal block insulation requirements are maintained for safety. To ensure that wires are correctly terminated the correct crimp terminal and tool for the wire size should be used. The equipment must be connected in accordance with the appropriate connection diagram. Equipment use

If the equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired. Removal of equipment front panel/cover

Removal of the equipment front panel/cover may expose hazardous live parts which must not be touched until the electrical power is removed. Equipment operations conditions

The equipment should be operated within the specified electrical and environmental limits.


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Current Transformer Circuits

Do not open the secondary circuit of a live CT since the high voltage produced may be lethal to personnel and could damage insulation. Generally, for safety, the secondary of the line CT must be shorted before opening any connections to it. For most equipment with ring-terminal connections, the threaded terminal block for current transformer termination has automatic CT shorting on removal of the module. Therefore external shorting of the CTs may not be required; the equipment documentation should be checked to see if this applies. For equipment with pin-terminal connections, the threaded terminal block for current transformer termination does NOT have automatic CT shorting on removal of the module. Insulation & Dielectric Strength Testing

Insulation testing may leave capacitors charged up to a hazardous voltage. At the end of each part of the test, the voltage should be gradually reduced to zero, to discharge capacitors, before the test leads are disconnected. Insertion of modules & PCB cards

Modules and PCB cards must not be inserted into or withdrawn from the equipment whilst it is energised, since this may result in damage. Cleaning

The equipment may be cleaned using a lint free cloth dampened with clean water, when no connections are energised.

1.3.2. DECOMMISSIONING AND DISPOSAL Decommissioning:

The supply input (auxiliary) for the equipment may include capacitors across the supply or to earth. To avoid electric shock or energy hazards, after completely isolating the supplies to the equipment (both poles of any dc supply), the capacitors should be safely discharged via the external terminals prior to decommissioning. Disposal:

It is recommended that incineration and disposal to water courses is avoided. The equipment should be disposed of in a safe manner.


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1.3.3. GENERAL CONSIDERATIONS Receipt of relays

Protective relays, although generally of robust construction, require careful treatment prior to installation on site. Upon receipt, relays should be examined immediately to ensure no damage has been sustained in transit. If damage has been sustained during transit a claim should be made to the transport contractor and Crompton Greaves Ltd. should be promptly notified. Electrostatic discharge

The relays use components that are sensitive to electrostatic discharges. The electronic circuits are well protected by the metal case and the internal module should not be withdrawn unnecessarily. When handling the module outside its case, care should be taken to avoid contact with components and electrical connections. If removed from the case for storage, the module should be placed in an electrically conducting antistatic bag. There are no setting adjustments within the module and it is advised that it is not unnecessarily disassembled. Although the printed circuit boards are plugged together, the connectors are a Manufacturing aid and not intended for frequent dismantling; in fact considerable effort may be required to separate them. Touching the printed circuit board should be avoided, since complementary metal oxide semiconductors (CMOS) are used, which can be damaged by static electricity discharged from the body.

1.3.4. 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 cause serious damage, which often may not be immediately apparent but the reliability of the circuit will have been reduced. The electronic circuits are completely safe from electrostatic discharge when housed in the case. Do not expose them to risk of damage by withdrawing modules unnecessarily. Each module incorporates the highest practicable protection for its semiconductor devices. However, if it becomes necessary to withdraw a module, the following precautions should be taken to preserve the high reliability and long life for which the equipment has been designed and manufactured. Before removing a module, ensure that you are at the same electrostatic potential as

the equipment by touching the case. 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. Do not pass the module to another person without first ensuring you are both at the

same electrostatic potential. Shaking hands achieves equipotential.


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

Store or transport the module in a conductive bag. If you are making measurements on the internal electronic circuitry of 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 500kΩ – 10MΩ. If a wrist strap is not available you should maintain regular contact with the case to prevent a build-up of static. Instrumentation which may be used for making measurements should be earthed to the case whenever possible.

1.3.5. 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-humidifier bags have been included in the packing they should be retained. The action of the de-humidifier crystals will be impaired if the bag has been exposed to ambient conditions and may be restored by gently heating the bag for about an hour, prior to replacing it in the carton. Dust which collects on a carton may, on subsequent unpacking, find its way into the relay; in damp conditions the carton and packing may become impregnated with moisture and the dehumidifier will lose its efficiency. Storage temperature: –25°C to +70°C.


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2. LOCAL PANEL USER INTERFACE

2.1. RELAY FRONT PANEL The below figure 2.1-1 shows, as an example, the front panel of the AEGIS Series Feeder Protection Relay and the location of the user interface elements for the local control of Relay.

Figure 2.1-1.Front Panel of Feeder Protection Relay

1. LED Indicators 2. 160x160 LCD Display 3. Keypad 4. USB Communication for PC 5. Model Number


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2.1.1. LED INDICATORS

This Relay provided with 16 LED Indicators:

Figure 2.1.1-1.LED Indicators of Feeder Protection Relay

Resetting the Operated LEDs/Output Relays: All the LEDs, Output Relays can be configured by using the menu’s in the BI/BO window. 1. If any protection function is operated and LEDs/Output Relays are Hand Reset, then

acknowledgement or Resetting is done by pressing the Esc( ) key in the keypad 2. We can activate or deactivate the LEDs/Output Relays by using the external Binary

Input.

LED Indicator Meaning Remarks

Power Auxiliary power has been switched on

Normal operation state

Alarm Indicates that any one of the Protection or Monitoring function has been picked up due to fault

Fault indication of the Protection and Monitoring functions

Trip

Indicates that Protection, Monitoring functions has been operated due to faults which are in the enabled condition.

Refer fault record for type of faults

Error Indicates the internal faults of the Relay

For the particular error in the Relay refer section 3.3

12 LEDS

Configurable LEDs for the indication of Alarm & Trip signals of the Protection & Monitoring functions.

We can set the LED operations as self or hand resets while the operation of Protection and Monitoring elements in the BI/BO menu.

Power

Alarm

Trip

Error


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2.1.2. LCD DISPLAY

AEGIS Feeder Relay is having the display 160*160 Graphical display. The purpose of this display is to show the configuration and parameterization values of the relay.

Figure 2.1.2-1.LCD Display of Feeder Protection Relay

Menu navigation and pointers Use the arrow keys UP ( ) and DOWN ( ) to move up and down in the main

Menu, that is on the left side of the display, the active main menu option is indicated with a cursor. The options in the main menu are abbreviations Ex: INFO (Information)

After any selection in the Main Menu, the possible navigating directions are indicated on the top of the Display window by arrows (,)

The complete description of the selected menu is indicated on the top of Display window(Ex: Information)

Backlight control The display backlit is automatically switched OFF after 1 minute when left idle. It can be switched on by pressing any key.


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2.1.3. KEYPAD

You can navigate the menu and set the required parameter values using the key pad and directions indicated on the top of the display. Key pad is composed of four arrow keys for navigation UP ( ), down ( ), Left ( ), Right ( ) , ESC ( ), ENTER ( ) keys and CLOSE ( ), TRIP ( ) keys for the control of breaker

Figure 2.1.3-1.Keypad of Feeder Protection Relay

1. UP/DOWN Keys to navigate in Main Menu, to Increase/Decrease Numerical Values and for Enable/Disable operations.

2. RIGHT/LEFT Keys to navigate in Sub-menu. 3. ESC Key to cancel the current selection and to reset the output relays/LED. 4. ENTER Key for edit & save the changed value. 5. CLOSE key is to close the breaker from the relay. 6. TRP key is to trip the breaker from the relay.

2.1.4. COMMUNICATION PORT The Front port of the relay is a standard USB port provided for interfacing with PC. This port is used for relay configuration, downloading fault, event and disturbance records. The rear port is either a, Standard RS-485 port Ethernet port

This port is used for communication with standard SCADA master/client softwares.

2.1.5. FLOWCHART FOR MENU NAVIGATING All the menu functions are based on the main menu/sub menu structure:

1. Use the arrow keys UP and DOWN to move up and down in the main menu. 2. To move to a sub menu, repeatedly push the RIGHT, LEFT key until the requested

submenu is shown as per the Indicated Arrows on the top of Display window 3. To move up and down in the Submenu use the UP and DOWN 4. At the any time to edit the value use the ENTER key, to increase or decrease the

any parameter value use UP and DOWN keys. Use the enter key for confirmations. 5. To cancel the settings at any time press the Esc key. 6. At any time to return to main Menu Press the Esc key.

1

2

3 4

5 6

I O


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Figure 2.1.5-1. Principles of the menu structure and navigation in the menus


PAGE 12

Main Menu: Menu structure of AEGIS Feeder Relay as shown in the below table, it describes the total parameters available in the sub menus.

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INFO

Information 2 Relay Description, Model No. and Serial No.

Password 2 Setting Password and Default load password

Error 19 Internal faults in the Relay indication

MESR

Currents Primary 5

Measured Values for the System Currents & Voltages

Voltages Primary(L-N) 5

Currents Secondary 7

Voltages Secondary(L-N) 7

Voltages Secondary(L-L) 3

True RMS power L1 6

Power Calculation for the phase wise True RMS power L2 6

True RMS power L3 6

Date & Time 2 Indication of Date and Time

Currents & Voltages Representation of System Voltages and Currents in Graphical Display

HRMN

Harmonics IL1 -

Graphical representation of the Harmonics in the Bar-Graph format & the Calculation of THD(%) by the Phase wise for the both Currents & Voltages

Harmonics IL2 -

Harmonics IL3 -

Harmonics UL1 -

Harmonics UL2 -

Harmonics UL3 -

FL-R Fault Recorder 22

Last 10 faults can be stored by the Relay. Fault description shows the Fault No, Date & time, Magnitudes and Phase angles of the Fault Currents and Voltages.

DR Disturbance Recorder 4 Contains features for enabling/disabling , Pre & Post fault conditions, sample rate & trigger options for DR

CONF CT/VT Setting 6 Primary and Secondary Settings for the CT,VT

Configuration 2 Breaker control settings i.e. Close and trip


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OC

3I> OC settings 6 We can set the all the Parameters for the Over Current element by this Menu i.e. Setting, TMS, Curve, DT, RST DT.

3I>> OC Settings 4 We can set the all the Parameters for the Instantaneous Over Current element by this Menu i.e. Setting, Curve, DT, RST DT.

Breaker failure Settings 2 This Setting allows the user to use the Relay as a Breaker back up relay

LED & S/W BI Settings for the OC

2 You can set LEDs & output Relays for the indication of Over Current elements.

LED & S/W BI Settings for the Breaker failure

2 You can set LEDs & output Relays for the Breaker failure element.

EF

Io> E/F settings 6 We can set the all the Parameters for the Earth fault Current element by this Menu i.e. Setting, TMS, Curve, DT, RST DT.

Io>> E/F Settings 4 We can set the all the Parameters for the Instantaneous Earth fault current element by this Menu i.e. Setting, Curve, DT, RST DT.

LED & S/W BI Settings for the OC

2 You can set LEDs & output Relays for the indication of Earth fault Current elements.

D-OC

Directional 3I> Settings

11

We can set the all the Parameters for the directional over current element by this Menu i.e. Setting, TMS, Curve, DT, RST DT, Directional angle, Polarization

Directional 3I>> Settings

4 We can set the all the Parameters for the Instantaneous directional over current element by this Menu i.e. Setting, TMS, Curve, DT, RST DT

LED & S/W BI Settings for the Directional over Current element

2 You can set LEDs & output Relays for the indication of Directional over current elements.

D-EF

Directional Io> Settings

9 We can set the all the Parameters for the directional Earth fault Current element by this Menu i.e. Setting, TMS, Curve, DT, RST DT, Directional angle, Polarization

Directional Io>> Settings

4 We can set the all the Parameters for the Instantaneous directional Earth fault current element by this Menu i.e. Setting, TMS, Curve, DT, RST DT

LED & S/W BI Settings for the Directional Earth fault Current

2 You can set LEDs & output Relays for the indication of Directional over current elements.


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OV

3U> OV settings 6 We can set the all the Parameters for the Over voltage element by this Menu i.e. Setting, TMS, Curve, DT, RST DT.

3U>> OV Settings 4 We can set the all the Parameters for the Instantaneous Over Voltage current element by this Menu i.e. Setting, Curve, DT, RST DT.

LED & S/W BI Settings for the Over Voltage element

2 You can set LEDs & output Relays for the indication of Over Voltage elements.

UV

3U> UV settings 8 We can set the all the Parameters for the under voltage element by this Menu i.e. Setting, TMS, Curve, DT, RST DT.

3U>> UV Settings 6 We can set the all the Parameters for the Instantaneous under Voltage element by this Menu i.e. Setting, Curve, DT, RST DT.

LED & S/W BI Settings for the under Voltage element

2 You can set LEDs & output Relays for the indication of Over Voltage elements.

NDR

NDR Settings 6 We can set the all the Parameters for the NDR element by this Menu i.e. Setting, Curve, DT, RST DT.

LED & S/W BI Settings for the NDR element

2 You can set LEDs & output Relays for the indication of NDR element.


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BR.C

Broken conductor Settings

4 We can set the all the Parameters for the Broken element by this Menu i.e. Setting, DT, RST DT.

LED & S/W BI Settings for the Broken conductor element

2 You can set LEDs & output Relays for the indication of Broken conductor element.

INRUSH Inrush Current Settings for the 2nd & 5th Harmonic Blocking

11 This setting allows the user to set the parameters to block 2nd & 5th Harmonic blocking

CTSV

CT Supervision Settings 5 This setting allows the user to set CT Supervision parameters settings

LED & S/W BI Settings for the CTSV element

2 You can set LEDs & output Relays for the indication of CTSV element.

VTFF

VT Supervision Settings 5 This setting allows the user to set VT Supervision parameters settings

LED & S/W BI Settings for the VTFF element

2 You can set LEDs & output Relays for the indication of VTFF element.

I2>

Negative phase sequence over current Settings

6 We can set the all the Parameters for the I2> element by this Menu i.e. Setting, Curve, DT, RST DT

LED & S/W BI Settings for the I2> element

2 You can set LEDs & output Relays for the indication of I2> element.

COMM Communication Settings

6 This menu allows the user to set type of Protocol ,Baud rate, Parity, Relay address, Period, Scaling etc.

BI-O BI-BO Settings 5

This Menu allows the user to set the External BIs, LED, Output Relays Configuration, Out puts Operation, Binary Input action on the Protection parameters. For the complete description refer section 3.20


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3. RELAY SETTINGS:

The Relay has different setting windows as shown in figures below. The Relay Setup is password protected for changing any parameter. The purpose of password is to prevent accidental change of configurations, parameters or settings. The password for entering Relay configuration setting window is 0002.

3.1. DEVICE INFO VIEW: As you POWER ON the relay INFORMATION window will appear on the screen. It will give the information about the Relay’s Type, Version, Model number & Serial number. Below figure 3.1-1 gives the complete idea about this menu.

Figure 3.1-1. Device info view

3.2. PASSWORD ACCESSING The navigation described below is to set the password for changing the relay configuration as shown in figure 3.2-1.

Figure 3.2-1. Password Accessing

Enter the password needed for the desired level: the password contains four digits. The digits are entered from left to right one by one by first moving to the position of the digit using the RIGHT key and then setting the desired digit value using the UP key & to save the password push the ENTER key. Please note that the relay password is 0002.

1


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3.3. ERROR STATUS VIEW This window is used to determine the type of internal error generated in the relay. The errors can be Calibration Error, Memory Error, Protection function or Monitoring function related error. Whenever the relay encounters a particular type of error, the ERROR LED glows, and the corresponding status Ok/Not Ok value is indicated in error window To navigate the Error window follow procedure described below in figure 3.3-1.

Figure 3.3-1. Error Status View

2 1


PAGE 18

3.4. MEASUREMENT VIEW

This menu displays measured values of system Primary, Secondary voltages and currents, Line to Neutral, Line to Line voltages, Sequence components of currents & voltages along with Date and Time. It also displays Phase wise power parameters of KW, KVAR, KVA, Power factor and system frequency.

Figure 3.4-1.Measurement View

1 2

4 5

7 8

3

3 6

6


PAGE 19

The Last window in the measurement menu displays vector representation of 3 phase system Voltages and Currents along with residual voltage & current as shown in below figure 3.4-2.

Figure 3.4-2. Graphical representation of 3 Phase System

If you left the measurement window idle for 5 sec you can observe the larger view than the default one as shown in the figure 3.4-3.

Figure 3.4-3. Zoom view of measurement window

IL1

IL2

IL3

UL1

UL2

UL3


PAGE 20

3.5. HARMONICS VIEW (HRMN) This menu indicates the 1st to 15th harmonics in the bar graph manner to understand the system conditions by phase wise for the both currents and voltages along with the THD % (Total harmonic Distortion).

1 3 5 7 9 11 13 15

Figure 3.5-1. Example of harmonic view

Harmonics: IL1

THD = 7.020 %

5.000

Freq

I


PAGE 21

3.6. CONFIGURATION (CONF) Configuration Menu allows the user to set the System parameters like CT, VT Primary, Secondary ratios, system frequency and the setting group for the protection parameters.

Figure 3.6-1. Configuration Settings

Permissible Values: CT PRIM: 020A - 2000A (In steps of 1A) CT SEC: 1A/5A VT PRIM: 3.3kV, 6.6kV, 11.00kV, 17.50kV, 22.00kV, 33.00kV VT SEC: 100V – 120V (In steps of 1V) SYS FRQ: 50Hz/60Hz SETTING GROUP: 1, 2, 3, 4

1

5

6 7


PAGE 22

3.7. NON DIRECTIONAL OVER CURRENT PROTECTION (51) (OC):

Over current protection is used against the short circuit faults and the heavy over loads. This protection measures the fundamental frequency components of the phase currents. The protection is sensitive for the highest of the three phase currents. Whenever this value exceeds the user pick up setting of a particular stage, that stage starts picking up and Alarm signal is generated. If the fault situation persists for longer than the estimated trip time configured in the relay, a trip signal is issued.

Breaker failure Protection (50BF):

After protection function generates a trip command, it is expected that the circuit breaker opens and/or the fault current drops below the pre-defined normal level. If not, then additional trip command will be generated for all back up circuit breakers to clear the fault.

3.7.1. IDMT SETTINGS:

Three phase time over current protection includes definite time and IDMT characteristics as per IEC and IEEE standards. Permissible Values: 3I> PROT: Enable/Disable 3I>SET: 5% -400% (In steps of 1%) 3I>Curve : IEC SI3, IECSI1, IEC VI, IEC EI, IEC LTI, IEEE VI, IEEE EI, IEEE SI3 RI, RD 3I>TMS: IEC Curves: 0.02 - 2(In steps of 0.01)

IEEE, RI & RD: 1.000-100.0 (In steps of 0.1) 3I>RST DT: 0.10S – 50.0S (In steps of 100ms) 3I>DT: INST & 0.100S-600.0S (In steps of 100ms)

3.7.2. HIGHSET SETTINGS

The Highset Stage of AEGIS Feeder Protection Relay having DT Characteristic of variable time operation with respect to the fault current.

Permissible Values: 3I>>PROT: Enable/Disable 3I>>SET: 50% -4000% (In steps of 1%) 3I>>DT: INST & 0.100S-600.0S (In steps of 100ms) 3I>>RST DT: 0.10S – 50.0S (In steps of 100ms)


PAGE 23

Fig

ure

3.7

-1. N

on

Dir

ecti

on

al O

ver

Cu

rren

t Se

ttin

gs

1 6

7

8

9

10

11


PAGE 24

3.8. NON DIRECTIONAL EARTH FAULT PROTECTION (51N) (EF):

The Non directional earth fault function is sensitive to the fundamental frequency component of the residual current 3I0. Whenever this value exceeds the user pick up setting of a particular stage, that stage starts picking up and Alarm signal is generated. If the fault situation persists for longer than the estimated trip time configured in the relay, a trip signal is issued.

Figure 3.8-1. Non Directional Earth Fault Settings

3.8.1. IDMT SETTINGS

Three phase time over current protection includes definite time and IDMT characteristics as per IEC and IEEE standards.

Permissible Values: Io> PROT: Enable/Disable Io>SET: 5% -400% (In steps of 1%) Io>Curve : IEC SI3, IECSI1, IEC VI, IEC EI, IEC LTI, IEEE VI, IEEE EI, IEEE SI3 RI, RD Io>TMS: IEC Curves: 0.02 - 2(In steps of 0.01)

IEEE, RI & RD: 1.000-100.0 (In steps of 0.1) Io>RST DT: 0.10S – 50.0S (In steps of 100ms) Io>DT: INST & 0.100S-600.0S (In steps of 100ms)

1

7

8 9 10


PAGE 25


The Highset Stage of AEGIS Feeder Protection Relay having DT Characteristics of variable time operation with respect to the fault current.

Permissible Values: Io>>PROT: Enable/Disable Io>>SET: 50% -4000% (In steps of 1%) Io>>DT: INST & 0.100S-600.0S (In steps of 100ms) Io>>RST DT: 0.10S – 50.0S (In steps of 100ms)


PAGE 26

3.9. DIRECTIONAL OVER CURRENT PROTECTION (67) (D-OC):

If the fault current can flow in both directions through a relay location, it is necessary to add directionality to over current relays to obtain the exact fault finding. For example parallel feeders and Ring main systems. In order to give directionality to over current element there should be a suitable reference or Polarization angle. System voltages should be taken as a reference because under fault conditions also there is no change in the Reference angle. Under system fault conditions fault current vector will generally lags its nominal phase voltage by an angle. To achieve the maximum sensitivity for the currents directional element should be act in required region; this can be achieved by directional angle of the relay. The stages are sensitive to the amplitude of the highest fundamental frequency current of the three measured phase currents.


Three phase time over current protection includes definite time and IDMT characteristics as per IEC and IEEE standards. Permissible Values: 3I> PROT: Enable/Disable 3I>SET: 005% -400% (In steps of 1%) 3I>Curve : IEC SI3, IECSI1, IEC VI, IEC EI, IEC LTI, IEEE VI, IEEE EI, IEEE SI3 RI, RD 3I>TMS: IEC Curves: 0.02 - 2(In steps of 0.01)

IEEE RI & RD: 1.000-100.0 (In steps of 0.1) RST DT: 0.10S – 50.0S (In steps of 100ms) 3I>DT: INST & 0.100S-600.0S (In steps of 100ms)


The Highset Stage of AEGIS Feeder Protection Relay having DT Characteristics of variable time operation with respect to the fault current.

Permissible Values: 3I>>PROT: Enable/Disable 3I>>SET: 050% -4000% (In steps of 1%) 3I>>DT: INST & 0.100S-600.0S (In steps of 100ms) RST DT: 0.10S – 50.0S (In steps of 100ms)

3.9.3. DIRECTIONAL SETTINGS

Permissible Values: DIR ANG: 180° to -180° (In steps of 1°) Polarization TYPE: PH-N, PH-PH, CROSS


PAGE 27

POLARIZATION : PH-N

Operating region is forward Operating region is Reverse

IL1: Va FWD IL1: Va REV

IL2: Vb FWD IL2: Vb REV

IL3: Vc FWD IL3: Vc REV In the PH-N polarization we can assign the reference parameters as per our requirement w.r.t phase wise currents. e.g. IL1: Va FWD can be set as IL1: Vb FWD or IL1: Vc FWD POLARIZATION : PH-PH


IL1: Vab FWD IL1: Vab REV

IL2: Vbc FWD IL2: Vbc REV

IL3: Vca FWD IL3: Vca REV

In the PH-PH polarization we can assign the reference parameters as per our requirement w.r.t phase wise currents. e.g. IL1: Vab REV can be set as IL1: Vbc REV or IL1: Vca REV POLARIZATION: CROSS


IL1: Vbc FWD IL1: Vbc REV

IL2: Vca FWD IL2: Vca REV

IL3: Vab FWD IL3: Vab REV

In the case of CROSS Polarization we can change only operating regions for the directional element. e.g. IL1: Vbc FWD can be set as IL1: Vbc REV only.


PAGE 28

Fig

ure

3.9

-1. D

irec

tio

na

l Ove

r C

urr

ent

Sett

ing

s

1 8

9

10

11

12


PAGE 29

3.10. DIRECTIONAL EARTH FAULT PROTECTION (67N) (D-EF):

The directional earth fault elements are available with independently settable two stages. In the case of Earth fault directional elements are internally polarized by Zero sequence voltage (Uo), Neutral voltage (ULo) and also Reactive and capacitive components which are useful in the case of Compensated networks & Un-earthed networks. Whenever the size of current and reference parameter and the phase angle between them fulfils the pickup Criteria, that stage starts picking up and Alarm signal is generated. If the fault situation persists for longer than the estimated trip time configured in the relay, a trip signal is issued.


Permissible Values: Io> PROT: Enable/Disable Io>SET: 005% -400% (In steps of 1%) Io>Curve : IEC SI3, IECSI1, IEC VI, IEC EI, IEC LTI, IEEE VI, IEEE EI, IEEE SI3 RI, RD Io>TMS: IEC Curves: 0.02 - 2(In steps of 0.01)

IEEE RI & RD: 1.000-100.0 (In steps of 0.1) RST DT: 0.10S – 50.0S (In steps of 100ms) Io>DT: INST & 0.100S-600.0S (In steps of 100ms)

3.10.2. HIGHEST SETTINGS The Highset Stage of AEGIS Feeder Protection Relay having DT Characteristics of variable time operation with respect to the fault current.

Permissible Values: Io>>PROT: Enable/Disable Io>>SET: 050% -2000% (In steps of 1%) Io>>DT: INST & 0.100S-600.0S (In steps of 100ms) Io>>RST DT: 0.10S – 50.0S (In steps of 100ms)

3.10.3. DIRECTIONAL SETTINGS

Permissible Values: Io DIR ANG: 180° to -180° (In steps of 1°) Io Pol TYPE: Vn-In, Vo-Io, I Sinϴ , Icosϴ

F/R Dir: FWD,REV


PAGE 30

Fig

ure

3.1

0-1

. Dir

ecti

on

al E

art

h F

au

lt S

etti

ng

s

1 9

9

9

9

9


PAGE 31

3.11. OVER VOLTAGE PROTECTION (59) (OV): Over Voltage conditions generally related to loss of load conditions. Under load shedding conditions, supply voltage will increase in the magnitude. This situation would normally rectify by the voltage regulating equipments such as AVRs or On Load Tap changers. However failure of this equipments to bring back the system to normal condition, this would create over voltage which should be identified with the Over voltage protection element otherwise system insulation life will decrease.

Figure 3.11-1. Over Voltage Protection Settings


The IDMT Stage of AEGIS Feeder Protection Relay consists of variable Characteristics i.e. Curve1, Curve2, Curve3, Curve4 and DT for the Relay operation Permissible Values: 3U> PROT: Enable/Disable 3U>SET: 105% -170% (In steps of 1%) 3U>Curve: Curve1, Curve2, Curve3, Curve4 and DT 3U>TMS: 0.02 - 2(In steps of 0.01) 3U>RST DT: 0.10S – 50.0S (In steps of 100ms) 3U>DT: INST & 0.100S-600.0S (In steps of 100ms)

1

10

11 12 13


PAGE 32


The Highset Stage of AEGIS Feeder Protection Relay having DT Characteristics of variable time operation with respect to the fault voltage.

Permissible Values: 3U>>PROT: Enable/Disable 3U>>SET: 150% -200% (In steps of 1%) 3U>DT: INST & 0.100S-600.0S (In steps of 100ms) 3U>RST DT: 0.10S – 50.0S (In steps of 100ms)


PAGE 33

3.12. UNDER VOLTAGE PROTECTION (27) (UV):

Voltage regulating equipments such as AVRs and On Load Tap changers should take action in maintaining the healthy voltage in the system. If those voltage regulating equipments are unsuccessful to bring back the system to healthy condition, then tripping signal will be issued by the under voltage element with assigned delay.

The proportion by which voltage decreases depends on the type of fault and location of the relay with respect to the fault point.

Even dead bus setting can also be configured through the NV PROT element.

Figure 3.12-1. Under Voltage Protection Settings


The IDMT Stage of AEGIS Feeder Protection Relay consists of variable Characteristics i.e. Curve1, Curve2, Curve3, Curve4 and DT for the Relay operation Permissible Values: 3U< PROT: Enable/Disable 3U<SET: 45% -90% (In steps of 1%) 3U<Curve: Curve1, Curve2 and DT 3U<TMS: 0.02 – 2.00 (In steps of 0.01) NV PROT: Enable/Disable

1

11

12 13 14


PAGE 34

NV VOLT: 003% – 020% (In steps of 1%) 3U<RST DT: 0.10S – 50.0S (In steps of 100ms) 3U<DT: INST & 0.100S-600.0S (In steps of 100ms)


The Highset Stage of AEGIS Feeder Protection Relay having DT Characteristics of variable time operation with respect to the fault voltage.

Permissible Values: 3U<<PROT: Enable/Disable 3U<<SET: 25% -50% (In steps of 1%) 3U<<DT: INST & 0.100S-600.0S (In steps of 100ms) 3U<<RST DT: 0.10S – 50.0S (In steps of 100ms) NV PROT: Enable/Disable NO Volt: 003% - 020%


PAGE 35

3.13. NDR PROTECTION (59N) (NDR):

On a healthy three phase power system, the addition of the each of the three phases to earth voltages is zero nominally, as these results from the vector addition of the three balanced vectors displaced by 120°.When an earth fault occurs this balance will be disturbed and residual voltage is produced. This can be measured by Residual voltage measuring element .This condition causes a rise in the neutral voltage with respect to earth, which is commonly referred to as a “Neutral Voltage Displacement” Voltage Setting applied to the protection elements is dependent on the magnitude of the residual voltage that is expected to occur during the fault conditions. There are two ways for calculating the neutral voltage displacement described below.

3VO: The zero sequence voltage is calculated internally from the phase voltages.

OPEN DELTA: The zero sequence voltage is measured with open delta voltage.

Figure 3.13-1. NDR Protection Settings

AEGIS Feeder Protection Relay consists of variable Characteristics i.e.Curve1, Curve2, Curve3, Curve4 and DT for the Relay operation.

1

12

13 14


PAGE 36

Permissible Values: PROT: Enable/Disable TYPE: OPEN DELTA/3VO SET: 005% -030% (In steps of 1%) CURVE: Curve1, Curve2, Curve3, Curve4 and DT TMS: 0.02 – 2.00 (In steps of 0.01) RST DT: 0.10S – 50.0S (In steps of 100ms) DT: INST & 0.100S-600.0S (In steps of 100ms)


PAGE 37

3.14. BROKEN CONDUCTOR PROTECTION (46BC):

The most of the faults in the power system are shunt type of faults, due to this kind of faults there is appreciable amount of current will increase and are easily detectable in most applications. Another type of unbalanced system condition is the series or open circuit fault .This fault can arise from broken conductor, mal operation of single phase switchgear, or the operation of fuses. Open circuit faults should not produce over current to sense, however they will produce unbalance components of currents (Negative sequence over current) which can be identified. But at light load conditions I2 may close to the full load steady state unbalance arising from CT errors, load unbalance etc. By taking the ratio of I2/I1, we can achieve the better efficiency because ratio is constant with the variations of load current.

Figure 3.14-1. Broken Conductor Protection Settings

The Broken conductor Stage of AEGIS Feeder Protection Relay consists of definite time Characteristics for the Relay operation

Permissible Values: BC PROT: Enable/Disable BC SET: 020% - 100% (In steps of 1%) BC DT: INST & 0.100S - 600.0S (In steps of 100ms)

1

13

14 15


PAGE 38

BC RST DT: 0.10S - 50.0S (In steps of 100ms)


PAGE 39

3.15. COLD LOAD PICK-UP & INRUSH CURRENT PROTECTION (68)

Cold load pick-up A situation is regarded as cold load when all the three phase currents have been less than a given idle value and then at least one of the currents exceeds a given pick-up level within 80 ms. In such case the cold load detection signal is activated for a given time. Application for cold load detection Right after closing a circuit breaker a given amount of overload can be allowed for a given limited time to take care of concurrent thermostat controlled loads. Cold load pick-up function does this for example by selecting a more coarse setting group for over-current stage(s). It is also possible to use the cold load detection signal to block any set of protection Stages for a given time. Inrush current detection Inrush current detection is quite similar with the cold load detection but it does also include a condition for 2nd & 5th harmonic relative content of the currents. When all phase currents have been less than a given idle value and then at least one of them exceeds a given pick-up level within 80 ms and the ratio 2nd harmonic ratio to fundamental frequency, If2/If1, AND/OR the ratio 5th harmonic ratio to fundamental frequency, If5/If1 of at least one phase exceeds the given setting, the inrush detection signal is activated. By setting the parameter for If2/If1 & If5/If1 to zero, the inrush signal will behave equally with the cold load pick-up signal. Application for inrush current detection The inrush current of transformers usually exceeds the pick-up setting of sensitive overcurrent stages and contains a lot of even harmonics. Right after closing a circuit breaker the pickup and tripping of sensitive overcurrent stages can be avoided by selecting a more coarse setting group for the appropriate over-current stage with inrush detect signal.


PAGE 40

Figure 3.15-1. Inrush Protection Settings

Permissible Values: 3I2f>PROT: Enable/Disable LOW SET: 005% - 100% (In steps of 1%)

(It depends on the value of HIGH SET i.e. we can’t set LOW SET above HIGH SET) HIGH SET: 005% - 100% (In steps of 1%)

(It depends on the value of LOW SET i.e. we can’t set HIGH SET below LOW SET) DT: INST & 0.10 – 1.00 (In steps of 100ms) If2/If1: 000% - 100% (In steps of 1%) If5/If1: 000% - 100% (In steps of 1%) If2 AND/OR If5 I>PROT: Enable/Disable I>>PROT: Enable/Disable I>PROT: Enable/Disable I>>PROT: Enable/Disable

1

14

15 16


PAGE 41

3.16. CT SUPERVISION (CTSV)(60CTS) Current transformer supervision is provided to detect loss of phase CT signals and inhibit the operation of current dependent protection elements. The CT supervisor function measures phase currents. If one of the three phase currents drops below Imin< setting, while another phase current is exceeding the Imax> setting, the function will issue an alarm after the operation delay has elapsed.

Figure 3.16-1. CT Supervision Settings

Permissible Values: PROT: Enable/Disable Imax: 000% - 1000% (In steps of 1%)

(It depends on the value of Imin i.e. we can’t set Imax below Imin) Imin: 000% - 1000% (In steps of 1%)

(It depends on the value of Imax i.e. we can’t set Imin above Imax) DT: INST & 0.100S-600.0S (In steps of 100ms) RST DT: 0.10S – 50.0S (In steps of 100ms)

1

15

16 17


PAGE 42

3.17. VT FUSE FAILURE PROTECTION (VTFF):

Voltage transformer supervision is provided to detect loss of one, two or three VT signals, providing indication and inhibition of voltage dependent protection elements. The VT fuse failure supervision detects failures between the voltage measurement circuit and the Relay. The failures are detected by the delta voltage and delta current algorithm. Upon the detection of fuse failure supervision function based on the time of operation relay will operate. The VTFF function measures the three phase voltages and currents. The negative sequence voltage U2 and the negative sequence current I2 are calculated. If U2 exceed the U2> setting and at the same time, I2 is less than the I2< setting, the function will issue an alarm after the operation delay has elapsed.

Logical diagram for the VT Fuse fail as represented in the below figure.

Figure 3.17-1. Logical Diagram for VTFF


PAGE 43

Figure 3.17-2. VTFF Settings

Permissible Values: PROT: Enable/Disable I2< SET:005% - 200% (In steps of 1%) U2> SET: 001% - 170% (In steps of 1%) DT: INST & 0.100S-600.0S (In steps of 100ms) RST DT: 0.10S – 50.0S (In steps of 100ms)

1

16

17

18


PAGE 44

3.18. NEGATIVE PHASE SEQUENCE OVER CURRENT PROTECTION (I2>) (46)

Any unbalance fault condition will produce Negative phase sequence current of some magnitude. This could not be identified by the traditional phase over current as well as the residual over current protection techniques. This could be achieved by the Negative phase sequence over current protection element. Thus, a negative sequence element can operate for both Phase and earth faults. This kind of protection will give greater sensitivity compared over current and earth fault protection elements. Both definite time and inverse time characteristics are available.

Figure 3.18-1. Negative Phase sequence Overcurrent Settings

Permissible Values: I2> PROT: Enable/Disable SET: 001% - 050% (In steps of 1%) CURVE: DT,IEC SI1, IEC SI3, IEC VI, IEC EI, IEC LTI, IEEE SI3, IEEE EI, IEEE VI, CURVE1 &

CURVE2 TMS: 0.02 – 2.00 (In steps of 0.01) K: 1.000 – 100.0 (In steps of 0.1) K1: 0.90 – 1.20 (In steps of 0.1)

1

17

18 19


PAGE 45

RST DT: 0.10S – 50.0S (In steps of 100ms) DT: INST & 0.100S-600.0S (In steps of 100ms)


PAGE 46

3.19. COMMUNICATION SETTINGS: The rear port of the relay can be configured for various settings as listed below:

Figure 3.19-1. Communication Settings

Permissible Values: PROTOCOL: MODBUS, IEC 103, CG VIEW, IEC 61850 BAUDRATE: 2400, 4800, 9600, 19200, 38400, 57600 PARITY: NONE, EVEN, ODD RLY ADRS: 000-254 (In steps of 001) PERIOD: 000S – 060S (In steps of 001) SCALING: 1.2X, 2.4X

1

18

19


PAGE 47

3.20. BINARY INPUT & BINARY OUTPUT SETTINGS: Relay having multiple Binary inputs & Binary outputs. The configuration allows to program or assign any relay output for any fault Pick-up and trip condition. The relay outputs can be configured on Digital Inputs.

Figure 3.20-1. Binary Inputs & Outputs Settings

1

20

21


PAGE 48

3.21. FAULT RECORD (FL-R) Aegis Feeder Protection Relay stores the latest 10 faults occurred in the system. Follow the below procedure to view the fault records.

1

3

4 5

5

6

6

7

13

14

15

Figure 3.21-1. Fault Records View


PAGE 49

3.22. FAULT RECORD OVERVIEW Aegis Feeder Protection Relay stores the latest 10 faults occurred in the system. Follow the below procedure to view the fault records.

1

3

4

Fault Number

Date & Time on which Fault Occurred Fault Currents

Fault Voltages

Phase angle, Polarization type & Polarizing voltage for IL1 when fault occured



Phase angle, Polarization type & for ILo when fault occured

Fault type

5

6

Figure 3.22-1. Fault Records Overview


PAGE 50

3.23. DISTURANCE RECORDER (DR)

The disturbance recorder can be used to record all the measured signals, that is, currents, voltages and the status information of digital inputs (DI) and digital outputs (DO) in oscillographic manner. The recorder can be triggered by any start or trip signal from any protection stage or by a digital input. The triggering signal is selected in the output matrix (vertical signal DR). The recording can also be triggered manually. All recordings are time stamped.

The disturbance records can be down loaded & viewed in Aegis relay configuration software.

Figure 3.23-1. Disturbance Recorder

Permissible Values: DIST. REC: ENABLE/DISABLE PRE-FAULT: 000% - 100% (In steps of 1%) SAMPLE: 8/Cycle, 16/Cycle, 32/Cycle DR TRGR: YES/NO

1

3

4


PAGE 51

4. TECHNICAL DATA

4.1. CONNECTIONS

4.1.1. MEASURING CIRCUITARY

Rated phase Current (In) - Current measuring range - Thermal withstand - Burden - Terminal Block

1A/5A (Configurable) 5% to 4000% of CT Secondary 2xIn (Continuously) 20xIn (for 3 seconds) <0.3VA@1A <0.5VA@5A Maximum wire dimensions: 6mm²

Rated Voltage (Un) - Voltage measuring range - Voltage withstand - Burden - Terminal Block

63.5Vac (L-N) 5% to 200% of VT Secondary 2xUn (Continuously) <0.15VA@70VAC <0.3VA@120VAC Maximum wire dimensions: 2.5mm² (12-28AWG)

Rated Frequency - Frequency measuring range

50Hz/60Hz

4.1.2. AUXILIARY VOLTAGE

Rated Voltage Power Consumption Terminal Block

18-52VDC <10W Maximum wire dimensions: 2.5mm² (12-28AWG)

75-250VDC <10W Maximum wire dimensions: 2.5mm² (12-28AWG)


PAGE 52

4.1.3. BINARY INPUTS

Number of Inputs 4

External Operating voltage Similar to the Auxiliary supply of relay

Terminal Block Maximum wire dimensions: 2.5mm² (12-28AWG)

4.1.4. BINARY OUTPUTS

Number of outputs 8

Normal Contact Contact Material Rated Switching Current Rated Carry Current Max. Switching Voltage Max. Switching Capacity Min. Permissible Load Heavy Duty Trip Contact Contact Material Rated Switching Current Rated Carry Current Max. Switching Voltage Max. Switching Capacity Min. Permissible Load

Ag-Alloy + gold plating (standard) 8A@250VAC, 5A@30VDC 8A 250VAC, 30VDC 2000VA, 150W 10mA, 5VDC Ag-Alloy 16A@250VAC, 16A@30VDC 16A 380VAC, 125VDC 4000VA, 480W 100mA, 5VDC

Terminal Block Maximum wire dimensions: 2.5mm² (12-28AWG)

4.1.5. LOCAL SERIAL COMMUNICATION PORT

Number of ports 1 on front panel

Electrical connection USB

Protocol CG PROPERIETARY

4.1.6. REMOTE CONTROL CONNECTIONS

Number of ports 2

Electrical connection RS-485 Ethernet 10 Base-T

Data transfer rate 2400 - 57600 2400 - 57600

Protocol Refer ordering information section 8


PAGE 53

4.2. TEST & ENVIROMENTAL CONDITIONS

4.2.1. TYPE TEST

Electrical Fast Transient Test IEC 60255-22-4 (Edition-2008)

High Frequency Disturbance Test IEC 60255-22-1 (2nd Edition-2005)

Impulse Voltage Test IEC 60255-5 (2nd Edition-2000)

Radiated Emission Test IEC 60255-25 (1st Edition-2000)

Radiation Susceptibility Test IEC 60255-22-3 (Edition-2007)

Conducted Emission Test IEC 60255-25 (1st Edition-2000)

Conducted Susceptibility Test IEC 60255-22-6 (1st Edition-2001)

Electrostatic Discharge Test IEC 60255-22-2 (3.0 Edition-2008)

Surge Immunity Test IEC 60255-22-5 (Edition 2008)

Power Frequency Magnetic Field Test IEC 61000-4-8 (Edition-2009)

Vibration Endurance Test (Class1) IEC 60255-21-1

Shock Response Test (Class1) IEC 60255-21-2

Shock Withstand Test (Class1) IEC 60255-21-2

Bump Test (Class 1) IEC 60255-21-2

Seismic Test

Ingress Protection Test ●IP:5X Test (Ingress of Dust for Enclosure CAT 2) ●IP:X4 Test (Splashing of Water for Enclosure)

IEC 60529 Ed.2.1:2001

Insulation Resistance Test IEC 60255-27:2005 Cl.10.5.3.3

Dielectric Test IEC 60255-27:2005 Cl.10.5.3.2

Relay Characteristics,Performance & Accuracy Test ● Operating (pickup) Value & Reset (Dropout) Value Test ● Pick up Test for High Fault ● Operating characteristics Test (IDMT Timing Test)

IEC 60255-12:1980 IEC 60255-3:1989

Rated Burden Test ● VA Burden for Auxiliary Power Supply ● VA Burden on Current Transformers ● VA Burden on Voltage Transformers

IEC 60255-1:2009 Cl.6.10

Thermal Requirement Test IEC 60255-27:2005 Cl.No.7.2

Mechanical Endurance Test IEC 60255-1:2009 Cl.6.11

Contact Performance Test IEC 60255-1:2009 Cl.6.11

Making Capacity Test ● AC Resistive Load ● DC Resistive Load

IEC 60255-1:2009 Cl.6.11

Breaking Capacity Test ● AC Resistive Load ● AC Inductive Load ● DC Resistive Load

IEC 60255-1:2009 Cl.6.11

Short Time Capacity Test IEC 60255-1:2009 Cl.6.11


PAGE 54

● AC Resistive Load ● DC Resistive Load

Effect of Interruption to DC Auxiliary Energizing Quantity

IEC 60255-11:2008

Alternating Component (Ripple) in DC Auxiliary Energizing Quanity

IEC 60255-11:2008

Climatic/Environmental Test ● Damp Heat Cyclic Test ● Dry Heat Test ● Cold Test ● Damp Heat,Steady State Test

IEC 60068-2-30 IEC 60068-2-2 IEC 60068-2-1 IEC 60068-2-78

Communication Protocol Conformance Test IEC 61850

4.2.2. CASING

Degree of protection (IEC 60529) IP54

Dimensions (W x H x D) 188.58 x 199.18 x 228.40 mm

Material 0.8mm CRCA MS

Weight 750 gm

4.2.3. PACKAGE

Dimensions (W x H x D) 188.58 x 199.18 x 228.40

Weight (Terminal, Package and Manual) 4.8 kg


PAGE 55

4.3. PROTECTION STAGES

4.3.1. NON DIRECTIONAL CURRENT PROTECTION STAGE NON DIRECTIONAL OVERCURRENT STAGE I> (50/51)

Pick Up Current Drop out Current

4% above Set Value 10% below Set Value

Definite Time Function Operating Time

DT 0 - 600s (step 0.1s)

Reset DT Function Operating Time

Reset DT 0 - 50s (step 0.1s)

Setting Range 5% - 400%

IDMT Function : Delay Curve Family Curve Type Time Multiplier (TMS)

(DT), IEC, IEEE, RI & RD IEC SI1, IEC SI3, IEC EI, IEC VI, IEC LTI, IEEE EI, IEEE VI, IEEE SI3, RI, RD For IEC: 0.02-2 (step 0.01) For IEEE, RI & RD: 1-100 (step 0.1)

Inaccuracy : Operating time at definite time function Operating time at IDMT function

± 1% or ± 30 ms ± 5% or at least ± 30 ms

NON DIRECTIONAL OVERCURRENT STAGE I>> (50/51)




DT 0 - 600s (step 0.1s)




Inaccuracy : Operating time at definite time function

± 1% or ± 30 ms


PAGE 56

NON DIRECTIONAL EARTH FAULT STAGE Io> (50N/51N)




DT 0 - 600s (step 0.1s)








NON DIRECTIONAL EARTH FAULT STAGE Io>> (50N/51N)




DT 0 - 600s (step 0.1s)





± 1% or ± 30 ms


PAGE 57

NEGATIVE PHASE SEQUENCE OVERCURRENT PROTECTION STAGE I2> (46)


IDMT Function : Delay Curve Family Curve Type Time Multiplier (TMS) Time Multiplier (K1)

(DT), IEC, IEEE IEC SI1, IEC SI3, IEC EI, IEC VI, IEC LTI, IEEE EI, IEEE VI, IEEE SI3, Curve1,Curve2 For IEC: 0.02-2 (step 0.01) For IEEE : 1-100 (step 0.1) For Curve1 & Curve2 : 1-50 (step 0.1) 0.90 - 1.20 (step 0.1)

Inaccuracy : Operating time at Definite time function Operating time at IDMT function

± 5% or ± 30 ms ± 7.5% or ± 30 ms


DT 0 - 600s (step 0.1s)



4.3.2. DIRECTIONAL CURRENT PROTECTION STAGE

DIRECTIONAL OVERCURRENT STAGE I> (67)




DT 0 - 600s (step 0.1s)




Base Angle Setting Range -180° to +179°

Operation Angle ± 89°



Inaccuracy : Operating time at definite time function Operating time at IDMT function Angle

± 1% or ± 30 ms ± 5% or at least ± 30 ms ±1°


PAGE 58

DIRECTIONAL OVER CURRENT STAGE I>> (67)




DT 0 - 600s (step 0.1s)





± 1% or ± 30 ms

DIRECTIONAL EARHT FAULT STAGE Io> (67N)




DT 0 - 600s (step 0.1s)




Base Angle Setting Range -180° to +179°

Operation Angle ± 89°

IDMT Function : Delay Curve Family Curve Type Time Mulitiplier (TMS)


Inaccuracy : Operating time at definite time function Operating time at IDMT function Angle

± 1% or ± 30 ms ± 5% or at least ± 30 ms ±1°

DIRECTIONAL EARHT FAULT STAGE Io>> (67N)




DT 0 - 600s (step 0.1s)





± 1% or ± 30 ms


PAGE 59

4.3.3. VOLTAGE PROTECTION STAGE

OVER VOLTAGE PROTECTION STAGE 3U> (59)




DT 0 - 600s (step 0.1s)




IDMT Function : Curve Type Time Mulitiplier (TMS)

Curve1, Curve2, Curve3, Curve4 0.02-2 (step 0.01)



OVER VOLTAGE PROTECTION STAGE 3U>> (59)




DT 0 - 600s (step 0.1s)





± 1% or ± 30 ms

UNDER VOLTAGE PROTECTION STAGE 3U< (27)

Pick Up Voltage Drop out Voltage

10% below Set Value 4% above Set Value


DT 0 - 600s (step 0.1s)




IDMT Function : Curve Type Time Multiplier (TMS)

Curve1, Curve2 0.02-2 (step 0.01)




PAGE 60

UNDER VOLTAGE PROTECTION STAGE 3U<< (27)


10% below Set Value 4% above Set Value


DT 0 - 600s (step 0.1s)





± 1% or ± 30 ms

NDR PROTECTION STAGE NDR (59N)



NDR Type 3Vo ; Open Delta


DT 0 - 600s (step 0.1s)




IDMT Function : Curve Type Time Multiplier (TMS)

Curve1, Curve2, Curve3, Curve4 0.02-2 (step 0.01)



4.4. CIRCUIT-BREAKER FAILURE PROTECTION

CIRCUIT BREAKER FAILURE PROTECTION (50BF)


DT 0 - 600s (step 0.1s)


± 1% or ± 30 ms


PAGE 61

4.5. SUPPORTING FUNCTIONS

BROKEN CONDUCTOR PROTECTION STAGE I2/I1 (46BC)


DT 0 - 600s (step 0.1s)





± 1% or ± 30 ms

INRUSH CURRENT DETECTION (68)


DT 0 - 600s (step 0.1s)

Setting Range LOW SET HIGH SET If2/If1 If5/If1

005%-100% * *Depends upon HIGH SET 005%-100% * *Depends upon LOW SET 000% - 100% (step 1%) 000% - 100% (step 1%)


± 1% or ± 30 ms

DISTURBANCE RECORDER (DR)

Sample Rate 8/Cycle, 16/Cycle, 32/Cycle

Pre fault Triggering Rate 000% - 100% (step 1%)

Disturbance Trigger YES/NO


PAGE 62

4.6. TRANSFORMER SUPERVISION

CURRENT TRANSFORMER SUPERVISION (60CTS)


DT 0 - 600s (step 0.1s)



Setting Range Imax Imin

000% - 1000% (step 1%)* *Depends upon Imin 000% - 1000% (step 1%)* *Depends upon Imax


± 1% or ± 30 ms

VOLTAGE TRANSFORMER FUSE FAILURE (VTFF)


DT 0 - 600s (step 0.1s)



Setting Range I2<SET U2>SET

005% - 200% (step 1%) 001% - 170% (step 1%)


± 1% or ± 30 ms


PAGE 63

X1

6

7

8

9

10

11

12

5

5. CONNECTIONS

5.1. REAR PANEL CONNECTIONS

Figure 5.1-1. Rear View of Feeder Protection Relay

TERMINAL DETAILS (X1)

NO. SYMBOL DESCRIPTION

5 IL1 Rph Current Input (1A/5A)

6 IL1

7 IL2 Yph Current Input (1A/5A)

8 IL2

9 IL3 Bph Current Input (1A/5A)

10 IL3

11 ILo Eph Current Input (1A/5A)

12 ILo


PAGE 64


PAGE 65



13 P (BO8) Binary Output Contact 8

14 NO (BO8)


16 NO (BO7)


18 NO (BO6)


20 NO (BO5)

21 NC Not Connected

22 VT1 Rph Voltage Input UL1

23 VT1

24 VT2 Yph Voltage Input UL2

25 VT2

26 VT3 Bph Voltage Input UL3

27 VT3

28 VT4 NDR Voltage Input ULo

29 VT4

30 NC Not Connected

31 + Auxiliary DC Input

32 -

33 NC Not Connected

34 EARTH Earth

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

X2


PAGE 66




(Heavy Duty) 36 NO (BO1)

37 NC (BO1)


(Heavy Duty) 39 NO (BO2)

40 NC (BO2)


42 NO (BO3)


44 NO (BO4)

45 + (BI1) Binary Input 1

46 - (BI1)


48 - (BI2)


50 - (BI3)

51 + (BI4) Binary input 4

52 - (BI4)

53 NC Not Connected

54 A

RS-485 Port 55 B

56 GND

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

X3


PAGE 67

5.2. WIRING DIAGRAM (AE001)

Figure 5.2-1. Wiring Diagram for Feeder Protection Relay (AE001)


PAGE 68

6. DIMENSIONS

Figure 6-1. Dimensions


PAGE 69

7. CURVES

7.1. STANDARD IDMT CHARACTERISTICS OF OVER CURRENT

Relay Characteristics Equation (IEC /IEEE)

IEC SI3 (Standard Inverse 3)

IEC SI1 (Standard Inverse 1)

IEC VI (Very Inverse)

IEC EI (Extremely Inverse)

IEC LTI (Long Time Inverse)

IEEE VI (Very Inverse)

IEEE EI (Extremely Inverse)

IEEE SI3

(Standard Inverse)

RI

RD


PAGE 70

Various characteristics IEC Curves for the Over Current protection as shown in below figure:

Figure 7.1-1.IEC VI & SI Curves Characteristics

IEC - Very Inverse-time characteristic IEC- Standard Inverse-time characteristic


PAGE 71

Figure 7.1-2.IEC EI & LTI Curves Characteristics

IEC - Extremely Inverse-time characteristic IEC - Long Time Inverse-time characteristic


PAGE 72

Various characteristics IEEE Curves for the Over Current protection as shown in below figure:

Figure 7.1-3.IEEE EI & VI Curves Characteristics

IEEE - Very Inverse-time characteristic IEEE - Extremely Inverse-time characteristic


PAGE 73

Figure 7.1-4.IEEE SI Curve Characteristics

IEEE – Standard Inverse-time characteristic


PAGE 74

Various characteristics RI & RD Curves for the Over Current protection as shown in below figure:

Figure 7.1-5.RI & RD Curves Characteristics

RI-type characteristic RD-type characteristic


PAGE 75

7.2. STANDARD CHARACTERISTIC FOR OVERVOLTAGE & NDR

Relay Characteristics Equation

Curve 1

Curve 2

Curve 3

Curve 4

7.3. STANDARD CHARACTERISTIC FOR UNDERVOLTAGE

Characteristic Equation

Curve 1

Curve 2

7.4. STANDARD CHARACTERISTIC FOR NEGATIVE PHASE SEQUENCE OVERCURRENT (I2>)

Relay Characteristics Equation

Curve 1

Curve 2


PAGE 76

8. ORDERING INFORMATION

AEGIS F

PROTECTION FUNCTION Three Phase O/C & E/F (50/51/50N/51N)

A

Three Phase Directional O/C & E/F (67/67N) Three Phase O/V, U/V & NDR (27,59,59N) Negative Phase Sequence (46) Cold load Pick up & Inrush CBFP (50BF) , Broken Conductor (46BC) VTFF (97) & CT Supervision (60CTS) Model A+ Following functions=Model B Reverse Power (32)

B

Loss of Excitation (40) Voltage Controlled Over Current (51V) Energy KWH,KVAH,KVARH Auto Reclose (79)

COMMUNICATION IEC 60870-5-103 on RS-485 1 MODBUS RTU on RS-485 2 IEC 60870-5-103 on Fiber Optic 3 DNP3 on RS485 4 Modbus TCP/IP on Ethernet RJ45 5 IEC61850 on Ethernet RJ45 6 IEC61850 on Fiber optic 7 IEC61850 ON RJ45 + IEC103 on RS485 8 IEC61850 ON Fiber Optic + IEC103 on Fiber Optic 9

DIGITAL INPUTS & DIGITAL OUTPUTS 4DI + 8DO 1 8DI + 12DO 2 10DI + 10DO 3 12DI + 8DO 4 4DI + 16DO 5 Reserved 6 Reserved 7 Reserved 8 Reserved 9

AUXILIARY POWER SUPPLY 18-52VDC 1

75-250VDC 2


PAGE 77

9. CUSTOMER SETTINGS MODEL NO: SERIAL NO:

CONFIGURATION SETTINGS: (CONF)

PARAMETER CUSTOMER SETTINGS

CT PRIM :

CT SEC :

VT PRIM :

VT SEC :

SYS FRQ :

SETTING GROUP :

NON DIRECTIONAL OC IDMT SETTINGS: 3I>


3I> PROT :

3I>SET :

3I>Curve :

3I>TMS :

3I>RST DT :

3I>DT :

NON DIRECTIONAL OC HIGHSET SETTINGS: 3I>>


3I>>PROT:

3I>>SET :

3I>>DT :

3I>>RST DT :


PAGE 78

NON DIRECTIONAL EF IDMT SETTINGS: Io>


Io> PROT :

Io>SET :

Io>Curve :

Io>TMS :

Io>RST DT :

Io>DT :

NON DIRECTIONAL EF HIGHSET SETTINGS: Io>>


Io>>PROT:

Io>>SET :

Io>>DT :

Io>>RST DT :

DIRECTIONAL OC IDMT SETTINGS: 3I>


3I> PROT :

3I>SET :

3I>Curve :

3I>TMS :

RST DT :

3I>DT :

DIRECTIONAL OC HIGHSET SETTINGS: 3I>>


3I>>PROT:

3I>>SET :

3I>>DT :

RSTDT :


PAGE 79

DIRECTIONAL SETTINGS (POLARIZATION):


DIR ANG :

Pol Type :

IL1 : IL2 : IL3 :

DIRECTIONAL EF IDMT SETTINGS: Io>


Io> PROT :

Io>SET :

Io>Curve :

Io>TMS :

Io>RST DT :

Io>DT :

DIRECTIONAL EF HIGHSET SETTINGS: Io>>


Io>>PROT:

Io>>SET :

Io>>DT :

Io>>RST DT :

DIRECTIONAL SETTINGS (POLARIZATION):


Io DIR ANG :

Io Pol Type :

F/R DIR :


PAGE 80

OV IDMT SETTINGS: 3U>


3U> PROT :

3U>SET :

3U>Curve :

3U>TMS :

3U>RST DT :

3U>DT :

OV HIGHSET SETTINGS: 3U>>


3U>>PROT:

3U>>SET :

3U>>DT :

3U>>RST DT :

UV IDMT SETTINGS: 3U<


3U< PROT :

3U<SET :

3U<Curve :

3U<TMS :

NV PROT :

NV VOLT :

3U<RST DT :

3U<DT :


PAGE 81

UV HIGHSET SETTINGS: 3U<<


3U<<PROT:

3U<<SET :

3U<<DT :

3U<<RST DT :

NV PROT :

NV VOLT :

NDR SETTINGS: NDR


PROT:

TYPE :

SET :

CURVE :

TMS :

RST DT :

DT:

BROKEN CONDUCTOR SETTINGS: (I2/I1>)


BC PROT :

SET :

BC DT :

BC RST DT:


PAGE 82

INRUSH SETTINGS: (3I2f>)


3I2f>PROT:

LOW SET :

HIGH SET :

DT :

If2/If1 :

If5/If1 :

If2 AND/OR If5 :

I>PROT :

I>>PROT :

I>PROT :

I>>PROT :

CT SUPERVISION SETTINGS: (CTSV)


PROT :

Imax :

Imin :

DT :

RST DT :

VT FUSE FAILURE SETTINGS: (VTFF)


PROT :

I2<SET :

U2>SET :

DT :

RST DT :


PAGE 83

NEGATIVE PHASE SEQUENCE OC PROTECTION SETTINGS: (I2>)

COMMUNICATION SETTINGS: (COMM)


PROTOCOL :

BAUDRATE :

PARITY :

RLY ADRS :

PERIOD :

SCALING :


I2>PROT :

SET :

CURVE :

TMS :

K1 :

RST DT :

DT :


PAGE 84

10. NOTES


PAGE 1

Crompton Greaves Ltd. Power Systems: M. V. Switchgear Division (S2)

A-3, MIDC, Ambad, Nasik - 422010. India.

Tel.: +91 253 2382271 to 75

Email: [email protected]

Registered Office

CG House, 6th

Floor, Dr.Annie Besant Road, Worli, Mumbai-400 030

Visit us at: www.cgglobal.com Doc. No. : AEGIS-F-A-00

http://www.cgglobal.com/


PAGE 2

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