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scheider electric MiCOM P746 Technical Manual

Numerical busbar protection
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Table of Contents

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MiCOM P746
Numerical Busbar Protection
P746/EN M/G31
Software Version 03
Hardware Suffix
K
Technical Manual

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Summary of Contents for scheider electric MiCOM P746

  • Page 1 MiCOM P746 Numerical Busbar Protection P746/EN M/G31 Software Version 03 Hardware Suffix Technical Manual...
  • Page 2 Note: The technical manual for this device 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. Contact the appropriate Schneider Electric technical sales office and request the necessary information.

  • Page 3: Table Of Contents

    CONTENTS Section 1 Introduction P746/EN IT/G31 Section 2 Technical Data P746/EN TD/G31 Section 3 Getting Started P746/EN GS/G31 Section 4 Settings P746/EN ST/G31 Section 5 Operation P746/EN OP/G31 Section 6 Application Notes P746/EN AP/G31 Section 7 Programmable Logic P746/EN PL/G31 Section 8 Measurements and Recording P746/EN MR/A11...

  • Page 5: Safety Section

    Pxxx/EN SS/G11 SAFETY SECTION...
  • Page 7 Pxxx/EN SS/G11 Safety Section Page 1/8 STANDARD SAFETY STATEMENTS AND EXTERNAL LABEL INFORMATION FOR SCHNEIDER ELECTRIC EQUIPMENT INTRODUCTION HEALTH AND SAFETY SYMBOLS AND EXTERNAL LABELS ON THE EQUIPMENT Symbols Labels INSTALLING, COMMISSIONING AND SERVICING DECOMMISSIONING AND DISPOSAL TECHNICAL SPECIFICATIONS FOR SAFETY Protective fuse rating Protective Class Installation Category...
  • Page 8 Pxxx/EN SS/G11 Page 2/8 Safety Section BLANK PAGE...

  • Page 9: Equipment

    Pxxx/EN SS/G11 Safety Section Page 3/8 INTRODUCTION This guide and the relevant equipment documentation provide full information on safe handling, commissioning and testing of this equipment. This Safety Guide also includes descriptions of equipment label markings. Documentation for equipment ordered from Schneider Electric is despatched separately from manufactured goods and may not be received at the same time.

  • Page 10: Symbols And External Labels On The Equipment

    Pxxx/EN SS/G11 Page 4/8 Safety Section SYMBOLS AND EXTERNAL LABELS ON THE EQUIPMENT For safety reasons the following symbols and external labels, which may be used on the equipment or referred to in the equipment documentation, should be understood before the equipment is installed or commissioned.
  • Page 11 Pxxx/EN SS/G11 Safety Section Page 5/8 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. Protection Class I Equipment Before energizing the equipment it must be earthed using the protective conductor terminal, if provided, or the appropriate termination of the supply plug in the case of plug connected equipment.
  • Page 12 Pxxx/EN SS/G11 Page 6/8 Safety Section UL and CSA/CUL Listed or Recognized equipment To maintain UL and CSA/CUL Listing/Recognized status for North America the equipment should be installed using UL or CSA Listed or Recognized parts for the following items: connection cables, protective fuses/fuseholders or circuit breakers, insulation crimp terminals and replacement internal battery, as specified in the equipment documentation.

  • Page 13: Decommissioning And Disposal

    Pxxx/EN SS/G11 Safety Section Page 7/8 External test blocks and test plugs Great care should be taken when using external test blocks and test plugs such as the MMLG, MMLB and MiCOM P990 types, hazardous voltages may be accessible when using these. *CT shorting links must be in place before the insertion or removal of MMLB test plugs, to avoid potentially lethal voltages.

  • Page 14: Technical Specifications For Safety

    Pxxx/EN SS/G11 Page 8/8 Safety Section TECHNICAL SPECIFICATIONS FOR SAFETY Unless otherwise stated in the equipment technical manual, the following data is applicable. Protective fuse rating The recommended maximum rating of the external protective fuse for equipments is 16A, high rupture capacity (HRC) Red Spot type NIT, or TIA, or equivalent. Unless otherwise stated in equipment technical manual, the following data is applicable.

  • Page 15: P746/En It/G31

    Introduction P746/EN IT/G31 MiCOM P746 INTRODUCTION Date: 2011 Hardware Suffix: Software Version: Connection Diagrams: 10P746xx...
  • Page 16 P746/EN IT/G31 Introduction MiCOM P746...
  • Page 17 Introduction P746/EN IT/G31 MiCOM P746 (IT) 1-1 CONTENTS MiCOM DOCUMENTATION STRUCTURE INTRODUCTION TO MiCOM PRODUCT SCOPE Functional overview Ordering options FIGURES FIGURE 1: FUNCTIONAL DIAGRAM...
  • Page 18 P746/EN IT/G31 Introduction (IT) 1-2 MiCOM P746 BLANK PAGE...
  • Page 19 Introduction P746/EN IT/G31 MiCOM P746 (IT) 1-3 MiCOM DOCUMENTATION STRUCTURE The manual provides a functional and technical description of the MiCOM protection relay and a comprehensive set of instructions for the relay’s use and application. The section contents are summarized below:...
  • Page 20 P746/EN IT/G31 Introduction (IT) 1-4 MiCOM P746 P746/EN SC SCADA Communications This section provides an overview regarding the SCADA communication interfaces of the relay. Detailed protocol mappings, semantics, profiles and interoperability tables are not provided within this manual. Separate documents are available per protocol, available for download from our website.

  • Page 21: Introduction To Micom

    Introduction P746/EN IT/G31 MiCOM P746 (IT) 1-5 INTRODUCTION TO MiCOM MiCOM is a comprehensive solution capable of meeting all electricity supply requirements. It comprises a range of components, systems and services from Schneider Electric. Central to the MiCOM concept is flexibility.

  • Page 22: Product Scope

    MiCOM P746 PRODUCT SCOPE The MiCOM P746 differential busbar protection relay has been designed for the protection of a wide range of substation busbars from distribution to transmission voltage levels. The relay includes a comprehensive range of non-protection features to aid with system diagnosis and fault analysis.

  • Page 23: Figure 1: Functional Diagram

    Introduction P746/EN IT/G31 MiCOM P746 (IT) 1-7 The P746 supports the following relay management functions in addition to the functions illustrated above. • 4 Alternative setting groups • Programmable function keys • Control inputs • Programmable scheme logic • Programmable allocation of digital inputs and outputs •...

  • Page 24: Ordering Options

    P746/EN IT/G31 Introduction (IT) 1-8 MiCOM P746 Ordering options Information Required with Order P746 Relay Type (Busbar Protection Relay) Auxiliary Voltage Rating 24 – 48V dc only 48 – 110V dc (30 – 100V ac) 110 – 250V dc (100 – 240V ac)

  • Page 25: P746/En Td/G31

    Technical Data P746/EN TD/G31 MiCOM P746 TECHNICAL DATA Date: 2011 Hardware Suffix: Software Version: Connection Diagrams: 10P746xx...
  • Page 26 P746/EN TD/G31 Technical Data MiCOM P746...
  • Page 27 Technical Data P746/EN TD/G31 MiCOM P746 (TD) 2-1 Optional Second Rear Communication Technical Data PortEIA(RS)232, 9 pin D-type female connector, Mechanical Specification socket SK4. Courier protocol: K-Bus, or EIA(RS)485 or EIA(RS)232. Maximum cable Design length: 15m. Modular MiCOM Px40 platform relay, Size 16“...
  • Page 28 P746/EN TD/G31 Technical Data (TD) 2-2 MiCOM P746 Receiver Optical Characteristics – 100 base Power supply FX interface Auxiliary Voltage (Vx) = 0°C to 70°C, V = 4.75 V to 5.25 V) Three ordering options: (i) Vx: 24 to 48 Vdc Parameter Min.
  • Page 29 Technical Data P746/EN TD/G31 MiCOM P746 (TD) 2-3 Output Contacts Environmental Conditions Standard Contacts Ambient Temperature Range General purpose relay outputs for signalling, Ambient temperature range tripping and alarming: Operating temperature range Rated voltage: –25 to +55 (or –13°F to +131°F) °C...
  • Page 30 P746/EN TD/G31 Technical Data (TD) 2-4 MiCOM P746 Impulse Voltage Withstand Test Immunity to Radiated Electromagnetic Per IEC 60255-27: 2005 Energy Front time: 1.2 µs, Time to half-value: 50 µs, Per IEC 60255-22-3: 2000, Class III: Peak value: 5 kV, 0.5J...
  • Page 31 Technical Data P746/EN TD/G31 MiCOM P746 (TD) 2-5 Product Safety Timing and Accuracy Per 2006/95/EC: Compliance with European Commission Low All quoted operating times include the closure Voltage Directive. Compliance is demonstrated of the standard trip output contact. by reference to generic safety standards: ∗...
  • Page 32 P746/EN TD/G31 Technical Data (TD) 2-6 MiCOM P746 Three phase overcurrent protection IRIG-B and Real Time Clock Accuracy Modulated IRIG-B: Pick-up: Modulation ratio: ∗ Setting ±5% or 20 mA Whichever Is Greater ∗ 1/3 or 1/6 (WIG) Input signal peak-peak amplitude: ∗...
  • Page 33 Technical Data P746/EN TD/G31 MiCOM P746 (TD) 2-7 IEC 61850 Ethernet data Settings, Measurements and Records List 10 Base T /100 Base TX Communications Interface in accordance with IEEE802.3 and IEC61850 Global Settings (System Data): Isolation 1.5kV Language: Cable type: Screened twisted pair STP ∗...
  • Page 34 P746/EN TD/G31 Technical Data (TD) 2-8 MiCOM P746 V<Status / V1<Status / V2>Status / VN>Status ∗ Disabled / Enabled V<Set / V1<Set: ∗ 10…120V (step 1V) V2>Set: ∗ 1…110V (step 1V) VN>Set: ∗ 1…80V (step 1V) Pickup timer: ∗ 0…10.00s (step 10ms)
  • Page 35 Technical Data P746/EN TD/G31 MiCOM P746 (TD) 2-9 Residual Overcurrent threshold function status Overcurrent Protection >2: ∗ Disabled Phase Fault Protection (50/51) ∗ Blocking 87BB 3 phase Overcurrent function Status I>1: ∗ Disabled ∗ High set I>2 ∗ DT ∗ Both ∗...
  • Page 36 P746/EN TD/G31 Technical Data (TD) 2-10 MiCOM P746 Oscillography COMMISSION TESTS Monitor Bit 1(up to 8): (Disturbance Recorder) Duration: ∗ Settable from 0.1 to 10.5s Binary function link strings, selecting which DDB signals have their status visible in the Trigger Position: ∗...

  • Page 37: P746/En Gs/G31

    Getting Started P746/EN GS/G31 MiCOM P746 GETTING STARTED Date: 2011 Hardware Suffix: Software Version: Connection Diagrams: 10P746xx...
  • Page 38 P746/EN GS/G31 Getting Started MiCOM P746...
  • Page 39 Getting Started P746/EN GS/G31 MiCOM P746 (GS) 3-1 CONTENTS GETTING STARTED User interfaces and menu structure Introduction to the relay 1.2.1 Front panel 1.2.2 Relay rear panel Relay connection and power-up Introduction to the user interfaces and settings options Menu structure 1.5.1...
  • Page 40 Getting Started P746/EN GS/G31 (GS) 3-2 MiCOM P746 FIGURES FIGURE 1: RELAY FRONT VIEW FIGURE 2: P746 RELAY REAR VIEW 80TE FIGURE 3: MENU STRUCTURE FIGURE 4: FRONT PANEL USER INTERFACE FIGURE 5: Default display navigation FIGURE 6: HOTKEY MENU NAVIGATION FIGURE 7: FRONT PORT CONNECTION FIGURE 8: PC –...

  • Page 41: Getting Started

    Getting Started P746/EN GS/G31 MiCOM P746 (GS) 3-3 GETTING STARTED BEFORE CARRYING OUT ANY WORK ON THE EQUIPMENT, THE USER SHOULD BE FAMILIAR WITH THE CONTENTS OF THE SAFETY SECTION/SAFETY GUIDE SFTY/4LM/E11 OR LATER ISSUE, THE TECHNICAL DATA SECTION AND THE RATINGS ON THE EQUIPMENT RATING LABEL.
  • Page 42 Getting Started P746/EN GS/G31 (GS) 3-4 MiCOM P746 Function key functionality: − The relay front panel features control pushbutton switches with programmable LEDs that facilitate local control. Factory default settings associate specific relay functions with these 10 direct-action pushbuttons and LEDs e.g. reset indications. Using programmable scheme logic, the user can readily change the default direct-action pushbutton functions and LED indications to fit specific control and operational needs.
  • Page 43 Getting Started P746/EN GS/G31 MiCOM P746 (GS) 3-5 Programmable LEDs All the programmable LEDs are tri-colour and can be programmed to indicate RED, YELLOW or GREEN depending on the requirements. The 8 programmable LEDs on the left are suitable for programming alarm indications and the default indications and functions are indicated in the table below.
  • Page 44 Getting Started P746/EN GS/G31 (GS) 3-6 MiCOM P746 LED Input Connection/Text Latched P746 LED Function Indication Number FnKey LED3 Red Fault on phase A FnKey LED3 Yellow Not used FnKey LED3 Green Not used FnKey LED4 Red Fault on phase B...

  • Page 45: Relay Rear Panel

    Getting Started P746/EN GS/G31 MiCOM P746 (GS) 3-7 1.2.2 Relay rear panel Examples of the rear panel of the relay are shown in Figure 2. All current signals, digital logic input signals and output contacts are connected at the rear of the relay. Also connected at the rear is the twisted pair wiring for the rear EIA(RS)485 communication port;...

  • Page 46: Introduction To The User Interfaces And Settings Options

    Getting Started P746/EN GS/G31 (GS) 3-8 MiCOM P746 Introduction to the user interfaces and settings options The relay has three user interfaces: − The front panel user interface via the LCD and keypad − The front port which supports Courier communication −...

  • Page 47: Menu Structure

    Getting Started P746/EN GS/G31 MiCOM P746 (GS) 3-9 Menu structure The relay’s menu is arranged in a tabular structure. Each setting in the menu is referred to as a cell, and each cell in the menu may be accessed by reference to a row and column address.

  • Page 48: Control And Support Settings

    Getting Started P746/EN GS/G31 (GS) 3-10 MiCOM P746 1.5.3 Control and support settings The control and support settings include: − Relay configuration settings − Open/close circuit breaker − CT & VT ratio settings − Reset LEDs − Active protection setting group −...
  • Page 49 Getting Started P746/EN GS/G31 MiCOM P746 (GS) 3-11 Level Meaning Read Operation Write Operation Read All All data and settings are All items writeable at level 1. Write Some readable. Setting Cells that change visibility Poll Measurements (Visible/Invisible). Setting Values (Primary/Secondary)

  • Page 50: Relay Configuration

    Getting Started P746/EN GS/G31 (GS) 3-12 MiCOM P746 Relay configuration The relay is a multi-function device that supports numerous different protection, control and communication features. In order to simplify the setting of the relay, there is a configuration settings column which can be used to enable or disable many of the functions of the relay.

  • Page 51: Default Display And Menu Time-Out

    Getting Started P746/EN GS/G31 MiCOM P746 (GS) 3-13 1.8.1 Default display and menu time-out The front panel menu has a default display, the contents of which can be selected from the following options in the ‘default display’ cell of the ‘Measure’t. setup’ column: −...

  • Page 52: Menu Navigation And Setting Browsing

    Getting Started P746/EN GS/G31 (GS) 3-14 MiCOM P746 FIGURE 5 depicts the navigation between default displays. DISPLAY NOT NERC DISPLAY NOT NERC COMPLIANT. OK? COMPLIANT. OK? NERC Compliant Banner Access level Date and Time Description Plant reference Access level Other default displays...

  • Page 53: Hotkey Menu Navigation

    Getting Started P746/EN GS/G31 MiCOM P746 (GS) 3-15 1.8.3 Hotkey menu navigation The hotkey menu can be browsed using the two keys directly below the LCD. These are known as direct access keys. The direct access keys perform the function that is displayed directly above them on the LCD.

  • Page 54: Password Entry

    Getting Started P746/EN GS/G31 (GS) 3-16 MiCOM P746 1.8.4 Password entry Configuring the default display (in addition to modification of other settings) requires level 3 access. .You will be prompted for a password before you can make any changes, as follows.

  • Page 55: Setting Changes

    Getting Started P746/EN GS/G31 MiCOM P746 (GS) 3-17 1.8.6 Setting changes To change the value of a setting, first navigate the menu to display the relevant cell. To , which will bring up a flashing cursor on the change the cell value press the enter key LCD to indicate that the value can be changed.
  • Page 56 Getting Started P746/EN GS/G31 (GS) 3-18 MiCOM P746 The relay is a Data Communication Equipment (DCE) device. Thus the pin connections of the relay’s 9-pin front port are as follows: Pin no. 2 Tx Transmit data Pin no. 3 Rx Receive data Pin no.

  • Page 57: Front Courier Port

    Getting Started P746/EN GS/G31 MiCOM P746 (GS) 3-19 1.9.1 Front courier port The front EIA(RS)232 9 pin port supports the Courier protocol for one to one communication. It is designed for use during installation and commissioning/maintenance and is not suitable for permanent connection. Since this interface will not be used to link the relay to a substation communication system, some of the features of Courier are not implemented.

  • Page 58: Connecting To The P746 Relay Using Micom S1 V2

    Getting Started P746/EN GS/G31 (GS) 3-20 MiCOM P746 • Minimum: − Processor: 1 GHz, − Memory: 256 MB, − Operating system: Windows 2000, − Screen resolution: 800 x 600. • Recommended: − Processor: 2 GHz, − Memory: 1 GB, − Operating system: Windows XP, −...
  • Page 59 Getting Started P746/EN GS/G31 MiCOM P746 (GS) 3-21 You access the MiCOM S1 launcher screen. The MiCOM S1 launcher is the software that gives access to the different application programs: • MiCOM S1 for MiCOM M/Px20 IEDs • MiCOM S1 for MiCOM Px30 IEDs •...
  • Page 60 Getting Started P746/EN GS/G31 (GS) 3-22 MiCOM P746 1.10.3.2 Open communication link with relay To open the communications link from S1 to the P746 relay the following procedure must be followed: First the communication setup must be adjusted if necessary. In the "Device" menu, select "Communications Setup…"...
  • Page 61 Getting Started P746/EN GS/G31 MiCOM P746 (GS) 3-23 This brings up a prompt for the address of the relay to be interrogated: When this has been entered a prompt for the password appears. When these have been entered satisfactorily the relay is then able to communicate with MiCOM S1.
  • Page 62 Getting Started P746/EN GS/G31 (GS) 3-24 MiCOM P746 This brings up a prompt for the relay model type where you can select the correct relay for your application: Clicking on OK will open the default file and you can start to edit settings. For further instruction on how to extract, download and modify settings files, please refer to the MiCOM S1 User Manual.
  • Page 63 Getting Started P746/EN GS/G31 MiCOM P746 (GS) 3-25 The MiCOM S1 Studio launcher screen is displayed: Toolbar Toolbar Toolbar Toolbar Toolbar Start page Start page Start page Start page Start page Studio Explorer & Studio Explorer & Studio Explorer &...
  • Page 64 Getting Started P746/EN GS/G31 (GS) 3-26 MiCOM P746 − Select “Px40 Series” from the presented options: − Upon a successful connection, a dialog will be displayed showing device type, model number and plant reference. Options for language, device name and comment are also available.
  • Page 65 Getting Started P746/EN GS/G31 MiCOM P746 (GS) 3-27 or or The following window is displayed: Enter the name of the system, and the path to save the system file. The new System is displayed in the Studio Explorer panel:...
  • Page 66 Getting Started P746/EN GS/G31 (GS) 3-28 MiCOM P746 Note: In the Studio Explorer panel, if an item is selected, its properties are displayed in the “Properties” panel 1.10.4.3 Create a new substation Select the system: the menu bar is updated with “new device”, “new substation”, “close”, “delete”, “paste”, “properties”...
  • Page 67 Getting Started P746/EN GS/G31 MiCOM P746 (GS) 3-29 The new substation is displayed and the menu bar is updated when a substation is selected: Import SCL Import SCL Create a new voltage level Create a new voltage level Click on “Import SCL” button to import a Substation Configuration File.
  • Page 68 Getting Started P746/EN GS/G31 (GS) 3-30 MiCOM P746 Select the model in the list (6) and click in the “Next” button (7). The “Device Name” panel is displayed. Enter the name and description of the relay (8) and click on the “Next” button (9).
  • Page 69 Getting Started P746/EN GS/G31 MiCOM P746 (GS) 3-31 The new device is created and displayed. 1.10.4.7 Open Settings File To open an existing file: − If the file is saved or if the relay is not connected: open the Settings folder and open the Settings file, −...
  • Page 70 Getting Started P746/EN GS/G31 (GS) 3-32 MiCOM P746 − Select the Model and click on the “Finish” button. The default settings are displayed.
  • Page 71 Getting Started P746/EN GS/G31 MiCOM P746 (GS) 3-33 Appendix – P746 Relay Menu Map (Default) Note: This menu map is annotated with the factory default settings. VIEW RECORDS MEASUREMENTS 1 MEASUREMENTS 2 DATE AND TIME SYSTEM DATA One box Language Select Event* conf.
  • Page 72 Getting Started P746/EN GS/G31 (GS) 3-34 MiCOM P746 RECORD CONTROL DISTURB RECORDER MEASURE'T SETUP CONFIGURATION CT AND VT RATIOS (When Visible) (When Visible) (When Visible) Restore Defaults Main VT Primary Clear Events Duration Default Display * No Operation 110,0 V 1.500 ms...
  • Page 73 Getting Started P746/EN GS/G31 MiCOM P746 (GS) 3-35 COMMUNICATIONS COMMISSION TESTS CONTROL INPUTS CTRL I/P CONFIG FUNCTION KEYS OPTO CONFIG (If set visible) (When Visible) (When Visible) (When Visible) (When Visible) RP1 Protocol Opto I/P Status Global Nominal V Ctrl I/P Status...
  • Page 74 Getting Started P746/EN GS/G31 (GS) 3-36 MiCOM P746 IED CONFIGURATOR SECURITY CONFIG SYSTEM CONFIG DIFF PROTECTION DEAD ZONE OC CTRL I/P LABELS (When visible) (When visible) GROUP 1 GROUP 1 GROUP 1 Switch Conf.Bank ACCESS ONLY FOR Control Input 1...
  • Page 75 Getting Started P746/EN GS/G31 MiCOM P746 (GS) 3-37 OVERCURRENT EARTH FAULT CB Fail & I< SUPERVISION INPUT LABELS GROUP 1 GROUP 1 GROUP 1 GROUP 1 GROUP 1 1-box Terminal 1 to 6 Terminal 1 to 6 BREAKER FAIL VT SUPERVISION Opto Input 1 I>1 Function...
  • Page 76 Getting Started P746/EN GS/G31 (GS) 3-38 MiCOM P746 OUPUT LABELS PSL DATA GROUP 1 Idem Group Relay 1 2,3 & 4 Grp 1 PSL Ref OutputR1 Reference Relay 2 JJ Month AAAA Output R2 HH:MM:SS:mmm Relay 3 Grp 1 PSL ID...

  • Page 77: P746/En St/G31

    Settings P746/EN ST/G31 MiCOM P746 SETTINGS Date: 2011 Hardware Suffix: Software Version: Connection Diagrams: 10P746xx...
  • Page 78 P746/EN ST/G31 Getting Started MiCOM P746...
  • Page 79 Settings P746/EN ST/G31 MiCOM P746 (ST) 4-1 CONTENTS SETTINGS Relay settings configuration 1.1.1 Default settings restore Protection settings 1.2.1 System Configuration 1.2.2 Differential protection configuration 1.2.3 Dead Zone Overcurrent configuration 1.2.4 Non directional Phase overcurrent protection 1.2.5 Earth fault (only available for one box mode) 1.2.6...
  • Page 80 P746/EN ST/G31 Settings (ST) 4-2 MiCOM P746 BLANK PAGE...
  • Page 81 Settings P746/EN ST/G31 MiCOM P746 (ST) 4-3 SETTINGS The P746 must be configured to the system and application by means of appropriate settings. The sequence in which the settings are listed and described in this chapter will be the protection setting, control and configuration settings and the disturbance recorder settings (see section P746/EN GS for the detailed relay menu maps).
  • Page 82 P746/EN ST/G31 Settings (ST) 4-4 MiCOM P746 Menu Text Default Setting Available Settings Setting Group 1 Enabled Enabled or Disabled If the setting group is disabled from the configuration, then all associated settings and signals are hidden, with the exception of this setting (paste).
  • Page 83 Settings P746/EN ST/G31 MiCOM P746 (ST) 4-5 Menu Text Default Setting Available Settings Commission Tests Visible Invisible or Visible Sets the Commissioning Tests menu visible further on in the relay settings menu. Setting Values Primary Primary or Secondary This affects all protection settings that are dependent upon CT and VT ratios.
  • Page 84 P746/EN ST/G31 Settings (ST) 4-6 MiCOM P746 Protection settings The protection settings include all the following items that become active once enabled in the configuration column of the relay menu database: − Protection element settings. − Programmable scheme logic (PSL).
  • Page 85 Settings P746/EN ST/G31 MiCOM P746 (ST) 4-7 Setting Range Menu Text Default Setting Step Size Min. Max. OP Mode = Three Box Mode Protected phase Phase A Phase A / Phase B / Phase C Sets the connected phase to be protected (only available for three box mode).
  • Page 86 P746/EN ST/G31 Settings (ST) 4-8 MiCOM P746 Setting Range Menu Text Default Setting Step Size Min. Max. tDIFF 0.000 s 0.000 s 10.00 s 10.00 ms Sets the time delay up to 10 seconds CheckZone Status Enabled Disabled / Enabled To enable (activate) or disable (turn off) IDCZ>2 Current...
  • Page 87 Settings P746/EN ST/G31 MiCOM P746 (ST) 4-9 Setting Range Menu Text Default Setting Step Size Min. Max. Zx CCTFAIL MODE Self-Reset Self-Reset / Alarm Latched / Blocking Latched Options for all the Zones differential element faulty calculation due to wrong position of CB or isolator or CT failure are as follow: –...

  • Page 88: Settings

    P746/EN ST/G31 Settings (ST) 4-10 MiCOM P746 Setting Range Menu Text Default Setting Step Size Min. Max. V2> Set 10.00 V 1.000 V 110.0 V 1.000 V If “V2> Status” is enabled, pickup setting for second stage of overvoltage element.
  • Page 89 Settings P746/EN ST/G31 MiCOM P746 (ST) 4-11 Setting Range Menu Text Default Setting Step Size Min. Max. OVERCURRENT TERMINAL 1 to 6 (one box) / TERMINAL 1 to 18 (three box) I>1 Function IEC S inverse Disabled / US ST Inverse / US Inverse /...

  • Page 90: Earth Fault (Only Available For One Box Mode)

    P746/EN ST/G31 Settings (ST) 4-12 MiCOM P746 1.2.5 Earth fault (only available for one box mode) Setting Range Menu Text Default Setting Step Size Min. Max. EARTH FAULT TERMINAL 1 to 6 (one box) IN>1 Function IEC S inverse Disabled / US ST Inverse / US Inverse /...

  • Page 91: Circuit Breaker Fail And Undercurrent Fonction

    Settings P746/EN ST/G31 MiCOM P746 (ST) 4-13 1.2.6 Circuit Breaker Fail and undercurrent fonction This function consists of two-stage circuit breaker fail functions that can be initiated by: • Internal protection element initiation. • External protection element initiation. For current-based protection, the reset condition is based on undercurrent operation to determine that the CB has opened.

  • Page 92: Control And Support Settings

    P746/EN ST/G31 Settings (ST) 4-14 MiCOM P746 Setting Range Menu Text Default Setting Step Size Min. Max. VTS Reset Mode Manual Manual / Auto This setting enables the automatic or manual mode of the voltage transformer supervision reset mode. VTS Time Delay 5.000 s...
  • Page 93 Settings P746/EN ST/G31 MiCOM P746 (ST) 4-15 1.3.1 System data This menu provides information for the device and general status of the relay. Setting Range Menu Text Default Setting Step Size Min. Max. Language English The default language used by the device. Selectable as English, French, German, Russian, Spanish.

  • Page 94: Date And Time

    P746/EN ST/G31 Settings (ST) 4-16 MiCOM P746 Setting Range Menu Text Default Setting Step Size Min. Max. Rly O/P Status 00000000 Duplicate. Displays the status of output relays. Alarm Status 1 00000000000000000000000000000000 32 bits field give status of first 32 alarms.
  • Page 95 Settings P746/EN ST/G31 MiCOM P746 (ST) 4-17 Setting Range Menu Text Default Setting Step Size Min. Max. Card not fitted/Card failed/ Signal IRIG-B Status Data healthy/No signal Displays the status of IRIG-B (with Irig-B option). Battery Status Data Displays whether the battery is healthy or not.

  • Page 96: Ct And Vt Ratios

    P746/EN ST/G31 Settings (ST) 4-18 MiCOM P746 Setting Range Menu Text Default Setting Step Size Min. Max. DST End Last First, Second, Third, Fourth, Last Setting to specify the week of the month in which daylight saving time adjustment ends.
  • Page 97 Settings P746/EN ST/G31 MiCOM P746 (ST) 4-19 1.3.4 Record control It is possible to disable the reporting of events from all interfaces that supports setting changes. The settings that control the various types of events are in the Record Control column.
  • Page 98 P746/EN ST/G31 Settings (ST) 4-20 MiCOM P746 1.3.5 Measurements Menu Text Default Settings Available settings MEASUREMENT SETUP Description / 3 ph-neutral Voltage Default Display Description / Date and Time / Plant reference / Frequency / Access Level This setting (front panel user interface only) can be used to select the default display from...
  • Page 99 Settings P746/EN ST/G31 MiCOM P746 (ST) 4-21 1.3.6.1 Communications settings 1.3.6.1.1 Courier protocol Setting Range Menu Text Default Setting Step Size Min. Max. COMMUNICATIONS RP1 Protocol Courier Indicates the communications protocol that will be used on the rear communications port.
  • Page 100 P746/EN ST/G31 Settings (ST) 4-22 MiCOM P746 Setting Range Menu Text Default Setting Step Size Min. Max. RP2 Address This cell sets the unique address for the relay such that only one relay is accessed by master station software. RP2 Inactivity Timer 15 mins.
  • Page 101 Settings P746/EN ST/G31 MiCOM P746 (ST) 4-23 1.3.7 Commissioning tests To help minimising the time required to test MiCOM relays the relay provides several test facilities under the ‘COMMISSION TESTS’ menu heading. There are menu cells which allow the status of the opto-isolated inputs, output relay contacts, internal digital data bus (DDB) signals and user-programmable LEDs to be monitored.
  • Page 102 P746/EN ST/G31 Settings (ST) 4-24 MiCOM P746 Menu Text Default Setting Available Settings No Operation, Apply Contact Test No Operation Test, Remove Test When the ‘Apply Test’ command in this cell is issued the contacts set for operation (set to ‘1’) in the ‘Test Pattern’...
  • Page 103 Settings P746/EN ST/G31 MiCOM P746 (ST) 4-25 Setting Range Menu Text Default Setting Step Size Min. Max. Characteristics Standard 60%-80% 50% - 70 % / Standard 60%-80% Controls the changement of state of opto isolated inputs, according to the nominal voltage value.
  • Page 104 P746/EN ST/G31 Settings (ST) 4-26 MiCOM P746 Setting Range Menu Text Default Setting Step Size Min. Max. Fn. Key 1 Label Function Key 1 Allows the text of the function key to be changed to something more suitable for the application.
  • Page 105 Settings P746/EN ST/G31 MiCOM P746 (ST) 4-27 Setting Range Menu Text Default Setting Step Size Min. Max. IP PARAMETERS IP Address Data Displays the unique network IP address that identifies the relay. Subnet Mask Data Displays the sub-network that the relay is connected to.
  • Page 106 P746/EN ST/G31 Settings (ST) 4-28 MiCOM P746 1.3.12 “SECURITY CONFIG” column The SECURITY CONFIG column contains the main configuration settings for Security functions. This column is used to set the password attempts number and duration. When these limits expire, access to the interface is blocked untill timer has expired. This setting enables or disables port access.
  • Page 107 Settings P746/EN ST/G31 MiCOM P746 (ST) 4-29 Setting Range Menu Text Default Setting Step Size Min. Max. Blk Time Remain Data Indicates the blocking time remain (in minute) Paswword Fallback Level The ‘fallback level’ is the password level adopted by the relay after an inactivity timeout, or after the user logs out.
  • Page 108 P746/EN ST/G31 Settings (ST) 4-30 MiCOM P746 Setting Range Menu Text Default Setting Step Size Min. Max. “ANALOG CHANNEL” submenus Analog. Channel 1 Any analog channel The Phase A calculated voltage is assigned to this channel. Analog. Channel 2 As above The Phase B calculated voltage is assigned to this channel.
  • Page 109 Settings P746/EN ST/G31 MiCOM P746 (ST) 4-31 Setting Range Menu Text Default Setting Step Size Min. Max. Analog. Channel 20 IB-T6/Ix-T16 As above The Terminal 6 Phase B calculated current is assigned to this channel. Analog. Channel 21 IC-T6/Ix-T17 As above The Terminal 6 Phase C calculated current is assigned to this channel.
  • Page 110 P746/EN ST/G31 Settings (ST) 4-32 MiCOM P746 Setting Range Menu Text Default Setting Step Size Min. Max. Input 9 Trigger Trigger L/H No Trigger, Trigger L/H, Trigger H/L Digital Input 10 Ouput R10 As above Relay 10 output digital channel.
  • Page 111 Settings P746/EN ST/G31 MiCOM P746 (ST) 4-33 Setting Range Menu Text Default Setting Step Size Min. Max. Input 22 Trigger No Trigger No Trigger, Trigger L/H, Trigger H/L Digital Input 23 CctFail Blk Z2 As above Circuity Fault in zone 2.
  • Page 112 P746/EN ST/G31 Settings (ST) 4-34 MiCOM P746 BLANK PAGE...

  • Page 113: P746/En Op/G31

    Operation P746/EN OP/G31 MiCOM P746 OPERATION Date: 2011 Hardware Suffix: Software Version: Connection Diagrams: 10P746xx...
  • Page 114 P746/EN OP/G31 Operation MiCOM P746...
  • Page 115 Operation P746/EN OP/G31 MiCOM P746 (OP) 5-1 CONTENTS OPERATION OF INDIVIDUAL PROTECTION FUNCTIONS Busbar Biased Current Differential Protection 1.1.1 Operating principle 1.1.2 Application of Kirchoffs law Busbar protection 1.2.1 Bias Characteristic and Differential current setting 1.2.2 Scheme supervision by Phase comparison element 1.2.3...
  • Page 116 P746/EN OP/G31 Operation (OP) 5-2 MiCOM P746 FIGURES FIGURE 1: DIFFERENTIAL BUSBAR PROTECTION PRINCIPLE FIGURE 2: P746 SCHEME CHARACTERISTIC FIGURE 3: CB ELEMENT LOGIC FIGURE 4: CB FAIL LOGIC FIGURE 5: CB FAIL ELEMENT LOGIC – INTERNALLY INITIATED FIGURE 6: CB FAIL ELEMENT LOGIC – EXTERNALLY INITIATED...
  • Page 117 • Instantaneous sum The algorithms applied in MiCOM P746 use the vector sum method (on Fourier). The instantaneous sum method has the advantage of cancelling the harmonic and DC components of external origin in the calculation and in particular under transformer inrush conditions.
  • Page 118 P746/EN OP/G31 Operation (OP) 5-4 MiCOM P746 1.1.2.1 Bias Characteristic and Differential current The operation of the busbar differential protection is based on the application of an algorithm having a biased characteristic, (Figure 2), in which a comparison is made between the differential current and a bias or restraining current.
  • Page 119 Operation P746/EN OP/G31 MiCOM P746 (OP) 5-5 Busbar protection 1.2.1 Bias Characteristic and Differential current setting Figure 2 shows the characteristics of the P746 scheme phase differential element. FIGURE 2: P746 SCHEME CHARACTERISTIC The Phase characteristic is determined from the following protection settings: •...
  • Page 120 P746/EN OP/G31 Operation (OP) 5-6 MiCOM P746 Example: 1 bar, 1 incomer (CT1 = 2000/1) and 2 outfeeds (CT2 = 1000/1 and CT3 = 500/1) If the setting of the phase comparison threshold is 50%, the phase comparison algorithm will use: •...
  • Page 121 Operation P746/EN OP/G31 MiCOM P746 (OP) 5-7 The check zone is the sum of all the current nodes entering and leaving the substation (feeders). Scheme differential current = sum of all differential current feeder nodes: (t) CZ = ⏐Σ i ⏐...
  • Page 122 P746/EN OP/G31 Operation (OP) 5-8 MiCOM P746 1.3.2 Circuit Breaker Fail (CBF) The detailed logic of the circuit breaker failure element follows. The P746 hardware corresponds to up to 6 circuit breaker and can accommodate 1 or 2 trip coils per breaker (depending on relay number, defined by P746 model number, and PSL(CB trip signal connection to the relay output)).:...
  • Page 123 Operation P746/EN OP/G31 MiCOM P746 (OP) 5-9 Internal undercurrent signals are available per phase to confirm that each pole has opened. To maintain the current criterion active while the signal crosses zero, there is a drop-off timer associated with the pl(t) signal. The latching duration is variable in order to take all cases into account: •...
  • Page 124 P746/EN OP/G31 Operation (OP) 5-10 MiCOM P746 The detection of breaker opening is made upon one of two scenarios: (1) The current falls below the instantaneous detection threshold, and does not rise again before the pulse timer expires; or (2) A CT current ringdown does not change sign, and remains in one polarity sense up until the timer expires.
  • Page 125 Operation P746/EN OP/G31 MiCOM P746 (OP) 5-11 CB Trip 3 ph: • Triphase Circuit Breaker Trip (Init 50BF TBF1 / TBF2), Logical OR of 87BB, 50BF, Manual Trip Zone X Note: The CB fail alarm is raised as soon as tBF1 or tBF2 or tBF3 or tBF4 has been reached.
  • Page 126 P746/EN OP/G31 Operation (OP) 5-12 MiCOM P746 1.3.2.1.6 Internally Initiated CBF i.e. Tripping from the Differential Element 87BB When a tripping order is generated by the busbar protection (87BB or 50BF) but not executed due to a circuit breaker failure condition, the following circuit breakers are required...
  • Page 127 Operation P746/EN OP/G31 MiCOM P746 (OP) 5-13 In summary tBF1 is used for re-trip and tBF2 for general bus zone back-trip Because the busbar protection scheme uses the substation topology, during circuit breaker failure conditions, circuit breaker operations are executed according to on the current state of the system.
  • Page 128 P746/EN OP/G31 Operation (OP) 5-14 MiCOM P746 1.3.2.1.8 Local re-trip after time tBf3 This re-trip command can be applied via either the main or back up trip coil. It is possible to choose between the 3 following modes: • Local re-trip activated/deactivated via PSL. The relay used for this function can use the same fixed logic for the busbar protection or other independent relays.
  • Page 129 Operation P746/EN OP/G31 MiCOM P746 (OP) 5-15 Three Phase Overcurrent Protection 1.4.1.1 Inverse Time (IDMT) Characteristic IDMT characteristics are selectable from a choice of four IEC/UK and five IEEE/US curves as shown in the table below. The IEC/UK IDMT curves conform to the following formula: ⎛...
  • Page 130 P746/EN OP/G31 Operation (OP) 5-16 MiCOM P746 All inverse reset curves conform to the following formula: ⎛ ⎞ ⎛ ⎞ ⎜ ⎟ × ⎜ ⎟ ⎜ ⎟ Reset α − ⎝ ⎠ ⎝ ⎠ Where: = Reset time Reset = Constant Ι...
  • Page 131 Operation P746/EN OP/G31 MiCOM P746 (OP) 5-17 ISOLATOR AND CIRCUIT BREAKER FUNCTION Isolator State Monitoring Features The following recommended functions, if used shall be set in the PSL: MiCOM relays can be set to monitor normally open (89A) and normally closed (89B) auxiliary contacts of the isolators.
  • Page 132 P746/EN OP/G31 Operation (OP) 5-18 MiCOM P746 No CB status available directly affects any function within the relay that requires this signal, for example topology for buscoupler, etc. If both 52A and 52B are used then status information will be available and in addition a discrepancy alarm will be possible, according to the following table.
  • Page 133 Operation P746/EN OP/G31 MiCOM P746 (OP) 5-19 OPERATION OF NON PROTECTION FUNCTIONS Programmable scheme logic 3.1.1 Level settings Name Range Step Size Time delay t 0-14400000ms 3.1.2 Accuracy Setting ±2% or 50ms whichever is greater Output conditioner timer Setting ±2% or 50ms whichever is greater Dwell conditioner timer Setting ±2% or 50ms whichever is greater...
  • Page 134 P746/EN OP/G31 Operation (OP) 5-20 MiCOM P746 The “Fn. Key Labels” cell makes it possible to change the text associated with each individual function key. This text will be displayed when a function key is accessed in the function key menu, or it can be displayed in the PSL.
  • Page 135 Operation P746/EN OP/G31 MiCOM P746 (OP) 5-21 Menu Text Default Setting Setting Range Step Size CTRL. I/P CONFIG. Hotkey Enabled 11111111111111111111111111111111 Control Input 1 Latched Latched, Pulsed SET/RESET, IN/OUT, Ctrl Command 1 SET/RESET ENABLED/DISABLED, ON/OFF Control Input 2 to 32...
  • Page 136 P746/EN OP/G31 Operation (OP) 5-22 MiCOM P746 BLANK PAGE...

  • Page 137: P746/En Ap/G31

    Application Notes P746/EN AP/G31 MiCOM P746 APPLICATION NOTES Date: 2011 Hardware Suffix: Software Version: Connection Diagrams: 10P746xx...
  • Page 138 P746/EN AP/G31 Application Notes MiCOM P746...
  • Page 139 Application Notes P746/EN AP/G31 MiCOM P746 (AP) 6-1 CONTENTS INTRODUCTION Protection of Substation Busbars APPLICATION OF INDIVIDUAL PROTECTION FUNCTIONS Terminal settings (for all protections) 2.1.1 CT Ratios 2.1.2 VT Ratios Busbar settings 2.2.1 Setting guidelines Additional protection settings 2.3.1 Dead Zone protection (DZ) 2.3.2...
  • Page 140 P746/EN AP/G31 Application Notes (AP) 6-2 MiCOM P746 BENEFITS OF SECTIONALIZED BUSBAR PROTECTION Limitation of the number of feeders 6.1.1 Bias characteristics 6.1.2 Bias current in discriminitative zones 6.1.3 Bias current in check zone Disavantages of busbar schemes with check zone AND high number of feeders 6.2.1...
  • Page 141 Application Notes P746/EN AP/G31 MiCOM P746 (AP) 6-3 8.2.3 Voltage information 8.2.4 3 boxes mode and simple redundancy: 8.2.5 2 out of 2 solution: Check list General Substation information Short Circuit Levels Switchgear Substation Architecture STANDARD CONFIGURATIONS APPLICATION OF NON PROTECTION FUNCTIONS 10.1...
  • Page 142 P746/EN AP/G31 Application Notes (AP) 6-4 MiCOM P746 BLANK PAGE...
  • Page 143 Application Notes P746/EN AP/G31 MiCOM P746 (AP) 6-5 INTRODUCTION Before carrying out any work on the equipment, the user should be familiar with the contents of the safety section/safety guide SFTY/4LM/C11 or later issue, the technical data section and the ratings on the equipment rating label.
  • Page 144 P746/EN AP/G31 Application Notes (AP) 6-6 MiCOM P746 APPLICATION OF INDIVIDUAL PROTECTION FUNCTIONS The following sections detail protection functions in addition to where and how they may be applied. Each section provides some worked examples on how the settings are applied to the relay.
  • Page 145 Application Notes P746/EN AP/G31 MiCOM P746 (AP) 6-7 Busbar settings Busbar Biased Current Differential Protection 2.2.1 Setting guidelines 2.2.1.1 87BB Phase Settings (Solid Earthed Network Schemes) An Excel spreadsheet tool called “Idiff_Ibias“ is available on request to assure a reliable...
  • Page 146 P746/EN AP/G31 Application Notes (AP) 6-8 MiCOM P746 2.2.1.1.1 Sub-station features Only 8 values have to be known: Number of independent bars Maximum number of infeeds Minimum load current in a feeder Maximum load current in a feeder Maximum load current in a bus...
  • Page 147 Application Notes P746/EN AP/G31 MiCOM P746 (AP) 6-9 4. Slope k2 (ID>2) Recommendation is 60% To be always stable in the worth CT ratio conditions (between the biggest CT and the smallest CT). Recommendation is 50% for China In china, the requirement is to be able to detect a resistive fault equal to 50% of the bias current.
  • Page 148 P746/EN AP/G31 Application Notes (AP) 6-10 MiCOM P746 During the internal fault: • the bias current is: Icc min (1 bar) + (n-1) x IloadMax (1 bar) • the differential current is: Icc min (1 bar) Thus the biggest slope for the Check Zone to detect the fault is:...
  • Page 149 Application Notes P746/EN AP/G31 MiCOM P746 (AP) 6-11 If for example: Icc min = IloadMax, the slope must be below 17% Recommendation is 25% for China In china, the requirement is to be able to trip for a resistive fault that is counted twice by the Check Zone (for example one and half circuit breaker substation).
  • Page 150 P746/EN AP/G31 Application Notes (AP) 6-12 MiCOM P746 Example: Infeed Contribution* 2500 / 11300 – ID>2 ID>2 Infeed 1 2500 / 5 2500 / 11300 2500 11300 2000 / 11300 – ID>2 ID>2 Infeed 2 2000 / 1 2000 / 11300...
  • Page 151 Application Notes P746/EN AP/G31 MiCOM P746 (AP) 6-13 Explanations of the values: ID>1 shall be higher than 120% of the highest phase to neutral fault to not operate in case of phase to neutral fault. Slope k1 recommendation is 10% to meet 10Pxx current transformers Slope k2 (ID>2) recommendation is 50 / 65%...
  • Page 152 P746/EN AP/G31 Application Notes (AP) 6-14 MiCOM P746 The examples above consider direct tripping of a 2-cycle circuit breaker. Note that where auxiliary tripping relays are used, an additional 10-15ms must be added to allow for trip relay operation. The phase undercurrent settings (Ι<) must be set less than load current, to ensure that Ι<...
  • Page 153 Application Notes P746/EN AP/G31 MiCOM P746 (AP) 6-15 CURRENT TRANSFORMERS A P746 can accommodate different CT ratios throughout the protected zone, the maximum difference being 40. In other words, the maximum ratio between the smallest primary CT winding and the biggest primary CT winding is 40. This mix must, therefore, be accounted for by the scheme and this is achieved by using the primary currents sent by the P746 to the P746 that undertakes scheme calculations.
  • Page 154 P746/EN AP/G31 Application Notes (AP) 6-16 MiCOM P746 ISOLATOR AND CIRCUIT BREAKER FUNCTION Isolator State Monitoring Features The P746 protections require a reliable indication of the state of the isolators to decide which breaker to trip in case of fault. The relay can incorporate isolator state monitoring, giving an...
  • Page 155 Application Notes P746/EN AP/G31 MiCOM P746 (AP) 6-17 4.1.4 Use of the two positions information In that case, in the P746 topology, the position will be seen closed only when the isolator will arrive at the closed position. This is not recommended as the P746 may trip in 2 steps instead of 1 in case of a fault appearing during the closing period of the isolator.
  • Page 156 P746/EN AP/G31 Application Notes (AP) 6-18 MiCOM P746 Trip relays and Trip Circuit Supervision Any relays contact can be used for tripping signals from busbar protection, overcurrent protection and breaker failure. The trip circuit, in most protective schemes, extends beyond the relay enclosure and passes through components such as fuses, links, relay contacts, auxiliary switches and other terminal boards.
  • Page 157 Application Notes P746/EN AP/G31 MiCOM P746 (AP) 6-19 This TCS scheme will function correctly even without resistor R1, since the opto input automatically limits the supervision current to less that 10mA. However, if the opto is accidentally shorted the circuit breaker may trip.
  • Page 158 P746/EN AP/G31 Application Notes (AP) 6-20 MiCOM P746 4.3.3 TCS scheme 2 4.3.3.1 Scheme description Optional Optional P2230ENa FIGURE 4: TCS SCHEME 2 Much like scheme 1, this scheme provides supervision of the trip coil with the breaker open or closed and also does not provide pre-closing supervision. However, using two opto inputs allows the relay to correctly monitor the circuit breaker status since they are connected in series with the CB auxiliary contacts.
  • Page 159 Application Notes P746/EN AP/G31 MiCOM P746 (AP) 6-21 4.3.5 TCS scheme 3 4.3.5.1 Scheme description P2231ENa FIGURE 6: TCS SCHEME 3 Scheme 3 is designed to provide supervision of the trip coil with the breaker open or closed, but unlike schemes 1 and 2, it also provides pre-closing supervision. Since only one opto input is used, this scheme is not compatible with latched trip contacts.
  • Page 160 P746/EN AP/G31 Application Notes (AP) 6-22 MiCOM P746 ISOLATION AND REDUCED FUNCTION MODE The scheme permits maintenance on the busbar and, or busbar protection whilst maintaining some form of protection if possible. The maintenance mode level in the P746 allows this to be possible and forces the scheme to a reduced operating mode as follow.
  • Page 161 Application Notes P746/EN AP/G31 MiCOM P746 (AP) 6-23 BENEFITS OF SECTIONALIZED BUSBAR PROTECTION P746 range of subcycle busbar protection relays are designed and proven for its sensitivity and fast operation for all type of internal faults. P746 ensures the required stability for all the external faults even with extremely high magnitude of fault currents.
  • Page 162 P746/EN AP/G31 Application Notes (AP) 6-24 MiCOM P746 6.1.2 Bias current in discriminitative zones Magnitude of bias current in discriminative zones will be equal to scalar sum of all the currents entering / leaving that particular zone ONLY. Zone 1 Bias current: ibiasZ(t) = |i1| + | i3| + … + |ic| = Σ |in1| Zone 2 Bias current: ibiasZ(t) = |ic| + |i2| + |im| = Σ...
  • Page 163 Application Notes P746/EN AP/G31 MiCOM P746 (AP) 6-25 6.2.3 Contingency during relay / CT failure When CT circuit supervision operates or relay fails in the non segregated busbar schemes it would affect the check zone and completely block the busbar protection. With the help of segregated busbar schemes, effect will be limited to one section of the busbar protection only.
  • Page 164 P746/EN AP/G31 Application Notes (AP) 6-26 MiCOM P746 TOPOLOGY The topological analysis of the state of the substation in real time is one of the primary factors of the reliability of numerical differential busbar protection. Thus in the case of a power system fault, this analysis determines the sections of the substation concerned with the fault and only takes those sections out of service.
  • Page 165 Application Notes P746/EN AP/G31 MiCOM P746 (AP) 6-27 Topology Monitoring Tool This topological monitoring is carried out from a single line diagram of the system, which is used to recreate the system using the topology configuration software. This can be carried out by customer.
  • Page 166 P746/EN AP/G31 Application Notes (AP) 6-28 MiCOM P746 Topology processing The following scenarios demonstrate how the dynamic topology processing works and accommodates anomalies and discrepancies in the scheme. 7.3.1 Single bar or double bus with bus sectionaliser Bus Section Closed...
  • Page 167 Application Notes P746/EN AP/G31 MiCOM P746 (AP) 6-29 7.3.2 Double bus with one CT bus coupler Coupling Closed Zone 1 = CT1 + CT3 Isolator Closed Isolator Closed Zone 2 = CT2 + CT3 Zone 1 = BB1 Zone 2 = BB2...
  • Page 168 P746/EN AP/G31 Application Notes (AP) 6-30 MiCOM P746 7.3.3 Double bus with two CT bus coupler FIGURE 13: BUS COUPLER CLOSED A zone is defined from a CT to an other CT or an open electrical element (coupler CB or isolator).
  • Page 169 Application Notes P746/EN AP/G31 MiCOM P746 (AP) 6-31 CT 4 CT 3 VZ 3 BB 2 BB 1 Coupling Closed Coupling Closed Coupling Closed Zone 1 = CT1 Isolator Closed Isolator Closed Zone 2 = CT2 Zone 1 = BB1...
  • Page 170 P746/EN AP/G31 Application Notes (AP) 6-32 MiCOM P746 7.3.4 CTs on one side of bus coupler 1 CT coupler and CB Closes on to external fault with wrong isolator or CB Status position through CB ExtFault CT removed from Zone 1...
  • Page 171 Application Notes P746/EN AP/G31 MiCOM P746 (AP) 6-33 7.3.5 CTs on both sides of bus coupler, CB closes before status acquisition. 2 CT coupler and CB Closes on to external fault with wrong isolator or CB Status position through CB...
  • Page 172 P746/EN AP/G31 Application Notes (AP) 6-34 MiCOM P746 7.3.6 CTs on one side of bus coupler, CB closed and fault evolves between CT and CB (even for switch onto fault). 1 CT coupler with CB closed - Fault clearance - Stage 1 P0844ENa FIGURE 19: CT’S ON ONE SIDE OF BUS COUPLER,...
  • Page 173 Application Notes P746/EN AP/G31 MiCOM P746 (AP) 6-35 Treating this as an open bus coupler circuit breaker as before the topology algorithm will have extended zone 1 with the area located between the CT and the circuit breaker. This then fully replicates the scheme up to the open bus coupler CB. Remember that in this example zone 2’s limit extended up to the circuit breaker but this zone has been tripped...
  • Page 174 P746/EN AP/G31 Application Notes (AP) 6-36 MiCOM P746 UNDERTAKING A NUMERICAL DIFFERENTIAL BUSBAR PROTECTION PROJECT This light Engineering can be done by anyone The substation construction will influence the protection scheme installed. It is advisable that a scheme evaluation is conducted as soon as possible, preferably at the same time as the definition of the equipment specification.
  • Page 175 Application Notes P746/EN AP/G31 MiCOM P746 (AP) 6-37 4 buses example: Feeder 15 Feeder 28 Feeder 1 Feeder 14 P0854ENa This scheme can be protected by 2 sets of 3 P746 connected as shown below: The trip information must be shared among the 2 sets of 3 P746 with high speed contact to the filtered or via goose messages with IEC 61850-8.1.
  • Page 176 P746/EN AP/G31 Application Notes (AP) 6-38 MiCOM P746 Application solutions 8.2.1 1 box mode: All analogue inputs, all digital inputs and all relay outputs are connected to one p746: 1 box Application cabling Ph C Ph C Ph B Ph B...
  • Page 177 Application Notes P746/EN AP/G31 MiCOM P746 (AP) 6-39 8.2.3 Voltage information When the 3 boxes mode is set, voltage information (based on set criteria) must be shared among the 3 P746. Voltage information must be shared 1 P746 per CT phase P0850ENa The information to be shared is the voltage algorithm output that allows the trip.
  • Page 178 P746/EN AP/G31 Application Notes (AP) 6-40 MiCOM P746 • To do so, the blocking information has to be sent from the connected P746 to the two other ones with the following methods: • Goose messages with IEC 61850-8.1 (recommended):...
  • Page 179 Application Notes P746/EN AP/G31 MiCOM P746 (AP) 6-41 • High speed contact to filtered optos: Note: the tripping time is delayed by around. Standard relay: 5ms + opto filtering: 5ms = 10ms High break/high speed relay: 0ms + opto filtering: 5ms = 5ms...
  • Page 180 P746/EN AP/G31 Application Notes (AP) 6-42 MiCOM P746 • high speed contact to unfiltered optos Note: the tripping time is delayed by around 5ms for Standard relay.
  • Page 181 Application Notes P746/EN AP/G31 MiCOM P746 (AP) 6-43 8.2.4 3 boxes mode and simple redundancy: When redundancy is needed, an alternative solution of doubling the number of P746 (i.e. 6 P746) is to add a forth one measuring the neutral path.
  • Page 182 P746/EN AP/G31 Application Notes (AP) 6-44 MiCOM P746 Check list The following steps shall be performed: Engineering phase: Check the CT compliances (using P746VkTest.xls & Rct_Approx.xls) Design the Junction schemes (using AUTOCAD (or equivalent)) Create the material definition and the wiring plans (distributed or centralised version) Label the relay Inputs &...
  • Page 183 Application Notes P746/EN AP/G31 MiCOM P746 (AP) 6-45 General Substation information Only a few system parameters are required and it is vital that these are included. • Number of feeders, bus couplers, bus sections • Positions of bus sections •...
  • Page 184 P746/EN AP/G31 Application Notes (AP) 6-46 MiCOM P746 STANDARD CONFIGURATIONS The following information relates only to the more common standard schemes. For further information on the accommodation of other busbar configurations consult your Schneider Electric representative. Here after is summarised the solution identification:...
  • Page 185 Application Notes P746/EN AP/G31 MiCOM P746 (AP) 6-47 The general rule to calculate the number of P746 to use is: 1 off P746 from 1 to 6 sets of CTs or 6 breakers (up to 7 isolators) and 2 sets of 1 P746 up to 12 sets of CTs when possible.
  • Page 186 P746/EN AP/G31 Application Notes (AP) 6-48 MiCOM P746 There are 4 feeders connected to the busbar. The bus section circuit breaker has CTs on either side. This configuration requires 1 P746. If it was up to 10 feeders connected to the busbar. This configuration would require 2 sets of 1 P746 or 3 P746.
  • Page 187 Application Notes P746/EN AP/G31 MiCOM P746 (AP) 6-49 FIGURE 24: BREAKER AND A HALF SCHEME The above example shows a breaker and a half scheme. There are 3 feeders connected to each busbar. This configuration requires 1 P746 If it was up to 12 feeders connected to the busbars, the scheme would require 2 sets of 1 P746 or 3 P746.
  • Page 188 P746/EN AP/G31 Application Notes (AP) 6-50 MiCOM P746 The additional P746 being for the bus section isolators is optional. The number of additional P746 being dependant on the number of bus section/bus coupler CTs. The type of P746 used for each bay will depend on the i/o requirements of the bay in question.
  • Page 189 Application Notes P746/EN AP/G31 MiCOM P746 (AP) 6-51 APPLICATION OF NON PROTECTION FUNCTIONS The non-protection features for the scheme are summarised below: • Scheme is centralised. • Local, zone and scheme measurements – various measurements are available locally via the relay LCD or remotely via the serial communication link.
  • Page 190 P746/EN AP/G31 Application Notes (AP) 6-52 MiCOM P746 CT REQUIREMENTS 11.1 Notation max fault maximum fault current (same for all feeders) in A max int maximum contribution from a feeder to an internal fault (depends on the cont feeder) in A...
  • Page 191 Application Notes P746/EN AP/G31 MiCOM P746 (AP) 6-53 11.2.2 CT Specification according to IEC 185, 44-6 and BS 3938 (British Standard) Class X according to British Standard: Minimum knee point voltage for saturation min = secondary I max x (R...
  • Page 192 P746/EN AP/G31 Application Notes (AP) 6-54 MiCOM P746 11.3 Support of IEEE C Class CTs MiCOM Px40 series protection is compatible with ANSI/IEEE current transformers as specified in the IEEE C57.13 standard. The applicable class for protection is class “C”, which specifies a non air-gapped core.
  • Page 193 Application Notes P746/EN AP/G31 MiCOM P746 (AP) 6-55 AUXILIARY SUPPLY FUSE RATING In the Safety section of this manual, the maximum allowable fuse rating of 16A is quoted. To allow time grading with fuses upstream, a lower fuselink current rating is often preferable.
  • Page 194 P746/EN AP/G31 Application Notes (AP) 6-56 MiCOM P746 BLANK PAGE...

  • Page 195: P746/En Pl/G31

    Programmable Logic P746/EN PL//G31 MiCOM P746 PROGRAMMABLE LOGIC Date: 2011 Hardware Suffix: Software Version: Connection Diagrams: 10P746xx...
  • Page 196 P746/EN PL//G31 Programmable Logic MiCOM P746...
  • Page 197 Programmable Logic P746/EN PL//G31 MiCOM P746 (PL) 7-1 CONTENTS PROGRAMMABLE LOGIC Overview MiCOM S1 or MiCOM S1 Studio Px40 PSL editor 1.2.1 Micom S1 V2 1.2.2 MiCOM S1 Studio 1.2.3 PSL Editor How to use MiCOM Px40 PSL editor Warnings Toolbar and commands 1.5.1...
  • Page 198 Sorted by DDB name Factory default programmable scheme logic Logic input mapping 1.10 Relay output contact mapping 1.11 Function key input mapping 1.12 Programmable LED output mapping 1.13 Fault recorder start mapping 1.14 PSL DATA column MiCOM P746 PROGRAMMABLE SCHEME LOGIC...

  • Page 199: Programmable Logic

    Programmable Logic P746/EN PL//G31 MiCOM P746 (PL) 7-3 PROGRAMMABLE LOGIC Overview The purpose of the programmable scheme logic (PSL) is to allow the relay user to configure an individual protection scheme to suit their own particular application. This is achieved through the use of programmable logic gates and delay timers.

  • Page 200: Psl Editor

    P746/EN PL//G31 Programmable Logic (PL) 7-4 MiCOM P746 1.2.3 PSL Editor The PSL Editor module enables you to connect to any MiCOM device front port, Rear port with courier protocol and Ethernet port with tunnelled courier protocol, retrieve and edit its Programmable Scheme Logic files and send the modified file back to a MiCOM Px40 device.

  • Page 201: Warnings

    Programmable Logic P746/EN PL//G31 MiCOM P746 (PL) 7-5 Warnings Before the scheme is sent to the relay checks are done. Various warning messages may be displayed as a result of these checks. The Editor first reads in the model number of the connected relay, and then compares it with the stored model number.

  • Page 202: Toolbar And Commands

    P746/EN PL//G31 Programmable Logic (PL) 7-6 MiCOM P746 Toolbar and commands There are a number of toolbars available for easy navigation and editing of PSL. 1.5.1 Standard tools • For file management and printing. 1.5.2 Alignment tools • To snap logic elements into horizontally or vertically aligned groupings.
  • Page 203 Programmable Logic P746/EN PL//G31 MiCOM P746 (PL) 7-7 Link Create a link between two logic symbols. Opto Signal Create an opto signal. Input Signal Create an input signal. Output Signal Create an output signal. GOOSE In Create an input signal to logic to receive a GOOSE message transmitted from another IED.

  • Page 204: Psl Logic Signals Properties

    P746/EN PL//G31 Programmable Logic (PL) 7-8 MiCOM P746 PSL logic signals properties The logic signal toolbar is used for the selection of logic signals. Performing a right-mouse click on any logic signal will open a context sensitive menu and one of the options for certain logic elements is the Properties… command. Selecting the Properties option will open a Component Properties window, the format of which will vary according to the logic signal selected.

  • Page 205: Input Signal Properties

    Programmable Logic P746/EN PL//G31 MiCOM P746 (PL) 7-9 1.6.3 Input signal properties Input Signal Relay logic functions provide logic output signals that can be used for programming in PSL. Depending on the relay functionality, operation of an active relay function will drive an associated DDB signal in PSL.

  • Page 206: Control In Signal Properties

    P746/EN PL//G31 Programmable Logic (PL) 7-10 MiCOM P746 1.6.7 Control in signal properties Control In There are 32 control inputs which can be activated via the relay menu, ‘hotkeys’ or via rear communications. Depending on the programmed setting i.e. latched or pulsed, an associated DDB signal will be activated in PSL when a control input is operated.
  • Page 207 Programmable Logic P746/EN PL//G31 MiCOM P746 (PL) 7-11 1.6.12 LED conditioner properties LED Conditioner 1. Select the LED name from the list (only shown when inserting a new symbol). 2. Configure the LED output to be Red, Yellow or Green.
  • Page 208 P746/EN PL//G31 Programmable Logic (PL) 7-12 MiCOM P746 1.6.14 Timer properties Each timer can be selected for pick up, drop off, dwell, pulse or pick-up/drop-off operation. 1. Choose the operation mode from the Timer Mode tick list. 2. Set the Pick-up Time (in milliseconds), if required.
  • Page 209 Programmable Logic P746/EN PL//G31 MiCOM P746 (PL) 7-13 The logic operations of the three variants of the gate are depicted in the diagram below: Standard no change / last state no change / last state Set Input Dominant no change / last state...
  • Page 210 P746/EN PL//G31 Programmable Logic (PL) 7-14 MiCOM P746 Description of P746 logic nodes 1.7.1 Sorted by DDB number English Text Source Description Relay 1 Relay Conditioner 1 Output Relay 1 Relay 32 Relay Conditioner 32 Output Relay 32 Opto Input 1...
  • Page 211 Programmable Logic P746/EN PL//G31 MiCOM P746 (PL) 7-15 English Text Source Description NIC Not Fitted UCA2 Network Interface Card not fitted/failed alarm NIC No Response UCA2 Network Interface Card not responding alarm NIC Fatal Error UCA2 Network Interface Card fatal error alarm indication NIC Soft.
  • Page 212 P746/EN PL//G31 Programmable Logic (PL) 7-16 MiCOM P746 English Text Source Description Q Bus Z1 alarm BUSBAR Diff Isolator Bus Zone 1 alarm (coupling with one or isolator(s) and one breaker) Q Bus Z1 Closed BUSBAR Diff Isolator Bus Zone 1 Closed (coupling with one or...
  • Page 213 Programmable Logic P746/EN PL//G31 MiCOM P746 (PL) 7-17 English Text Source Description Monitor Port 5 Commissioning Test Monitor Port 5 Monitor Port 6 Commissioning Test Monitor Port 6 Monitor Port 7 Commissioning Test Monitor Port 7 Monitor Port 8 Commissioning Test...
  • Page 214 P746/EN PL//G31 Programmable Logic (PL) 7-18 MiCOM P746 English Text Source Description 1142 T1 IN>1 Trip Phase Over Current Terminal 1 (feeder or coupler) IN>1 Trip 1143 T1 IN>2 Trip Phase Over Current Terminal 1 (feeder or coupler) IN>2 Trip 1152 T6 IN>1 Trip...
  • Page 215 Programmable Logic P746/EN PL//G31 MiCOM P746 (PL) 7-19 English Text Source Description 1519 Id Start Z2 A DIFF Busbar Idiff Zone 2 StartA 1520 Id Start Z2 B DIFF Busbar Idiff Zone 2 StartB 1521 Id Start Z2 C DIFF...
  • Page 216 P746/EN PL//G31 Programmable Logic (PL) 7-20 MiCOM P746 English Text Source Description 1809 Diff Fault CZ A BUSBAR Diff Check Zone Busbar Diff Phase A Fault 1810 Diff Fault CZ B BUSBAR Diff Check Zone Busbar Diff Phase B Fault...
  • Page 217 Programmable Logic P746/EN PL//G31 MiCOM P746 (PL) 7-21 1.7.2 Sorted by DDB name English Text Source Description 103 Command Command Blocking Block 103 MonitorBlock Monitor blocking Any Start 1312 Protection Starts Any Start (most) Any Trip Any Trip Bad OSI Config.
  • Page 218 P746/EN PL//G31 Programmable Logic (PL) 7-22 MiCOM P746 English Text Source Description CctFail Blk Z2 A BUSBAR Diff Zone 2 Phase A Circuity Fault CctFail Blk Z2 B BUSBAR Diff Zone 2 Phase B Circuity Fault CctFail Blk Z2 C...
  • Page 219 Programmable Logic P746/EN PL//G31 MiCOM P746 (PL) 7-23 English Text Source Description Diff Z2 Blked 1816 BUSBAR Diff Zone 2 Busbar Diff Blocked Diff Z2 C Blked 1819 BUSBAR Diff Zone 2 Busbar Diff Phase C Blocked Ext CBF INIT T1...
  • Page 220 P746/EN PL//G31 Programmable Logic (PL) 7-24 MiCOM P746 English Text Source Description Idiff Trip DIFF Differential busbar Trip (Or gate of Z1 Diff and Z2 Diff) Idiff Trip A DIFF Differential busbar Trip A (Or gate of Z1 Diff PhaseA,...
  • Page 221 Programmable Logic P746/EN PL//G31 MiCOM P746 (PL) 7-25 English Text Source Description Q Bus Z1 alarm BUSBAR Diff Isolator Bus Zone 1 alarm (coupling with one or isolator(s) and one breaker) Q Bus Z1 Closed BUSBAR Diff Isolator Bus Zone 1 Closed (coupling with one or...
  • Page 222 P746/EN PL//G31 Programmable Logic (PL) 7-26 MiCOM P746 English Text Source Description T1 IN>1 TimeBlk Terminal 1 (feeder or coupler) IN>1 Timer Blocked T1 IN>1 Trip 1142 Phase Over Current Terminal 1 (feeder or coupler) IN>1 Trip T1 IN>2 Start...
  • Page 223 Programmable Logic P746/EN PL//G31 MiCOM P746 (PL) 7-27 English Text Source Description V<1 Timer Block Not Used V<2 Timer Block Not Used V>1 Timer Block Not Used V>2 Timer Block Not Used Virtual Input 01 1856 UCA2 GOOSE GOOSE Input 01 - Allows binary signals to be...
  • Page 224 P746/EN PL//G31 Programmable Logic (PL) 7-28 MiCOM P746 Factory default programmable scheme logic The following section details the default settings of the PSL. The P746 models are as follows: Relay Outputs Model Logic Inputs High break Total relays relays P746xxxA...
  • Page 225 Programmable Logic P746/EN PL//G31 MiCOM P746 (PL) 7-29 Opto-Input P746 Relay Text Function Number Input L20 Not mapped Input L21 Not mapped Input L22 Not mapped Input L23 Not mapped Input L24 Not mapped Input L25 Not mapped Input L26...
  • Page 226 P746/EN PL//G31 Programmable Logic (PL) 7-30 MiCOM P746 1.10 Relay output contact mapping The default mappings for each of the relay output contacts are as shown in the following table: Relay P746 Relay Contact P746 Relay Text Function Conditioner Number...
  • Page 227 Programmable Logic P746/EN PL//G31 MiCOM P746 (PL) 7-31 A fault record can be generated by connecting one or a number of contacts to the “Fault Record Trigger” in PSL. It is recommended that the triggering contact be ‘self reset’ and not a latching.
  • Page 228 P746/EN PL//G31 Programmable Logic (PL) 7-32 MiCOM P746 LED Input Connection/Text Latched P746 LED Function Indication Number LED7 Red 50BF Trip zone 1 LED7 Yellow 87BB & 50 BF trip zone 1 LED7 Green 87BB Trip zone 1 LED8 Red...
  • Page 229 1.14 PSL DATA column The MiCOM P746 relay contains a PSL DATA column that can be used to track PSL modifications. A total of 12 cells are contained in the PSL DATA column, 3 for each setting group. The function for each cell is shown below: Grp.
  • Page 230 P746/EN PL//G31 Programmable Logic (PL) 7-34 MiCOM P746 MiCOM P746 PROGRAMMABLE SCHEME LOGIC INPUTS P746 CB1 opto input and status LED (1) mapping CB1 52B (open) CB1 52B (open) Input L1 & CB1 Closed DDB #064 DDB #719 LED1 Red...
  • Page 231 Programmable Logic P746/EN PL//G31 MiCOM P746 (PL) 7-35 INPUTS P746 Isolator Q1 input mapping Input L7 & Q1 Z1 Closed DDB #070 DDB #755 Q1 Z2 Closed DDB #757 Isolator Q2 input mapping Input L8 & Q2 Z1 Closed DDB #071...
  • Page 232 P746/EN PL//G31 Programmable Logic (PL) 7-36 MiCOM P746 LEFT-HAND LEDS 1/2 P746 Z1 trip LED CBF Bktrip Z1 LED7 Red Non - DDB #1122 DDB #204 Latching Idiff Trip Z1 LED7 Grn DDB #912 DDB #205 Z2 trip LED CBF Bktrip Z2...
  • Page 233 Programmable Logic P746/EN PL//G31 MiCOM P746 (PL) 7-37 LEFT-HAND LEDS 2/2 P746 Fault phase A Fault A FnKey LED3 Red DDB #893 DDB #212 Latching FnKey LED3 Grn DDB #213 Fault Phase B Fault B FnKey LED4 Red DDB #894...
  • Page 234 P746/EN PL//G31 Programmable Logic (PL) 7-38 MiCOM P746 OUTPUT RELAYS 1/2 P746 Terminal CB1 trip mapping T1 I>1 Trip DDB #1008 T1 I>2 Trip Int CBF Init T1 DDB #1009 DDB #1290 T1 IN>1 Trip DDB #1142 T1 IN>2 Trip...
  • Page 235 Programmable Logic P746/EN PL//G31 MiCOM P746 (PL) 7-39 OUTPUT RELAYS 2/2 P746 Terminal CB4 trip mapping T4 I>1 Trip DDB #1014 T4 I>2 Trip Int CBF Init T4 DDB #1015 T4 IN>1 Trip DDB #1293 DDB #1148 T4 IN>2 Trip...
  • Page 236 P746/EN PL//G31 Programmable Logic (PL) 7-40 MiCOM P746 Circuitry Fault Cct Fail Z1 Alm DDB #467 Output R7 Cct Fail Z2 Alm Pick-Up DDB #006 DDB #468 Cct Fail CZ Alm DDB #469 Fault zone 1 Idiff Start Z1 Output R8...

  • Page 237: P746/En Mr/A11

    Measurements and Recording P746/EN MR/A11 MiCOM P746 MEASUREMENTS AND RECORDING Date: 2008 Hardware Suffix: Software Version: Connection Diagrams: 10P746xx (xx = 01 to 07)
  • Page 238 P746/EN MR/A11 Measurements and Recording MiCOM P746...
  • Page 239 Measurements and Recording P746/EN MR/A11 MiCOM P746 (MR) 8-1 CONTENTS MEASUREMENTS AND RECORDING Introduction Event & fault records 1.2.1 Types of event 1.2.2 Resetting of event/fault records 1.2.3 Viewing event records via MiCOM S1 support software 1.2.4 Event filtering Disturbance recorder Measurements 1.4.1...
  • Page 240 P746/EN MR/A11 Measurements and Recording (MR) 8-2 MiCOM P746 BLANK PAGE...
  • Page 241 Measurements and Recording P746/EN MR/A11 MiCOM P746 (MR) 8-3 MEASUREMENTS AND RECORDING Introduction The P746 is equipped with integral measurements, event, fault and disturbance recording facilities suitable for analysis of complex system disturbances. The relay is flexible enough to allow for the programming of these facilities to specific user application requirements and are discussed below.
  • Page 242 P746/EN MR/A11 Measurements and Recording (MR) 8-4 MiCOM P746 VIEW RECORDS LCD Reference Description Start Elements2 T6 I>2 Start, T7 I>1 Start, T7 I>2 Start, T8 I>1 Start, T8 I>2 Start, T9 I>1 Start, T9 I>2 Start, T10 I>1 Start, T10 I>2 Start, T11 I>1 Start, T11 I>2 Start, T12 I>1 Start, T12 I>2...
  • Page 243 Measurements and Recording P746/EN MR/A11 MiCOM P746 (MR) 8-5 VIEW RECORDS LCD Reference Description IA-2 Magnitude Magnitude of phase A current on terminal 2 IB-2 Magnitude Magnitude of phase B current on terminal 2 IC-2 Magnitude Magnitude of phase C current on terminal 2...
  • Page 244 P746/EN MR/A11 Measurements and Recording (MR) 8-6 MiCOM P746 VIEW RECORDS LCD Reference Description IC Z2 Diff Differential phase C current of the zone 2 IA Z2 Bias Bias phase A current of the zone 2 IB-Z2 Bias Bias phase B current of the zone 2...
  • Page 245 Measurements and Recording P746/EN MR/A11 MiCOM P746 (MR) 8-7 1.2.1.2 Change of state of one or more output relay contacts If one or more of the output relay contacts have changed state since the last time that the protection algorithm ran, then the new status is logged as an event. When this event is selected to be viewed on the LCD, three applicable cells will become visible as shown below: Time &...
  • Page 246 P746/EN MR/A11 Measurements and Recording (MR) 8-8 MiCOM P746 中国 English Français Deutsch Español Русский CBF Alarm Bus Alarm ADD DJ FINT Alm Mld. LSV LSSS УРОВ: СИГН.ШСВ 母联 CB 失灵告警 INTBarr Mldg StW\d142 CTS T1 STC T1 STI T1 КЦИ...
  • Page 247 Measurements and Recording P746/EN MR/A11 MiCOM P746 (MR) 8-9 1.2.1.7 Setting changes Changes to any setting within the relay are logged as an event. Two examples are shown in the following table: Type of Setting Change Displayed Text in Event Record...
  • Page 248 P746/EN MR/A11 Measurements and Recording (MR) 8-10 MiCOM P746 1.2.4 Event filtering It is possible to disable the reporting of events from all interfaces that supports setting changes. The settings that control the various types of events are in the “RECORD CONTROL”...
  • Page 249 Measurements and Recording P746/EN MR/A11 MiCOM P746 (MR) 8-11 If the Protection Event setting is enabled a further set of settings is revealed which allow the event generation by individual DDB signals to be enabled or disabled. For further information regarding events and their specific meaning, refer to relay menu database document (P746/EN MD).
  • Page 250 P746/EN MR/A11 Measurements and Recording (MR) 8-12 MiCOM P746 Setting Range Menu Text Default Setting Step Size Min. Max. Analog. Channel 9 IC-T2/Ix-T5 As above The Terminal 2 Phase C calculated current is assigned to this channel. Analog. Channel 10...
  • Page 251 Measurements and Recording P746/EN MR/A11 MiCOM P746 (MR) 8-13 Setting Range Menu Text Default Setting Step Size Min. Max. Digital Input 2 Output R2 As above The relay 2 output digital channel is assigned to this channel. Input 2 Trigger...
  • Page 252 P746/EN MR/A11 Measurements and Recording (MR) 8-14 MiCOM P746 Setting Range Menu Text Default Setting Step Size Min. Max. Input 14 Trigger Trigger L/H No Trigger, Trigger L/H, Trigger H/L Digital Input 15 Idiff Start Z2 As above Differential current in main zone 2.
  • Page 253 Measurements and Recording P746/EN MR/A11 MiCOM P746 (MR) 8-15 Setting Range Menu Text Default Setting Step Size Min. Max. Input 26 Trigger No Trigger No Trigger, Trigger L/H, Trigger H/L Digital Input 27 Diff CZ Blked As above Check Zone Busbar Diff in Block Status...
  • Page 254 P746/EN MR/A11 Measurements and Recording (MR) 8-16 MiCOM P746 Measurements The relay produces a variety of both directly measured and calculated system quantities. These measurement values are updated on a per second basis and can be viewed in the “Measurements” columns (up to three) of the relay or via MiCOM S1 Measurement viewer.
  • Page 255 Measurements and Recording P746/EN MR/A11 MiCOM P746 (MR) 8-17 Menu Text Default Settings Available settings MEASUREMENT SETUP IA1 / IB1 / IC1 / VA / VB / VC / IA2 / IB2 / IC2 / IA3 / IB3 / IC3 /...
  • Page 256 P746/EN MR/A11 Measurements and Recording (MR) 8-18 MiCOM P746 MEASUREMENTS 1 MEASUREMENTS 2 One box configuration Three box configuration IB-6 Magnitude IX-17 Magnitude IB-6 Phase Angle IX-17 Phase Angle IC-6 Magnitude IX-18 Magnitude IC-6 Phase Angle IX-18 Phase Angle I0-1 Magnitude...

  • Page 257: P746/En Fd/G31

    Firmware Design P746/EN FD/G31 MiCOM P746 FIRMWARE DESIGN Date: 2011 Hardware Suffix: Software Version: Connection Diagrams: 10P746xx...
  • Page 258 P746/EN FD/G31 Firmware Design MiCOM P746...
  • Page 259 Firmware Design P746/EN FD/G31 MiCOM P746 (FD) 9-1 CONTENTS RELAY SYSTEM OVERVIEW Hardware overview 1.1.1 Processor board (Main board) 1.1.2 Analogue Input module 1.1.3 Input and output boards 1.1.4 Power supply module 1.1.5 IRIG-B board 1.1.6 Second rear comms board (optional) 1.1.7...
  • Page 260 P746/EN FD/G31 Firmware Design (FD) 9-2 MiCOM P746 2.11 Ethernet board 2.12 Mechanical layout RELAY SOFTWARE Real-time operating system System services software Platform software 3.3.1 Record logging 3.3.2 Settings database 3.3.3 Database interface Protection and control software 3.4.1 Overview - protection and control scheduling 3.4.2...
  • Page 261 READ ENTER P3701ENc Main board FIGURE 1: MiCOM P746 ARCHITECTURE The different modules that can be present in the relay are as follows: 1.1.1 Processor board (Main board) The main board performs some functions for the relay (fixed and programmable scheme logic…) and controls the operation of modules which are on its interconnection bus within the...
  • Page 262 P746/EN FD/G31 Firmware Design (FD) 9-4 MiCOM P746 1.1.3 Input and output boards Relay outputs Model Opto-inputs normally change over open P746xxxA 16 x UNI P746xxxB 16 x UNI P746xxxC 16 x UNI P746xxxD 16 x UNI P746xxxE 24 x UNI...
  • Page 263 Firmware Design P746/EN FD/G31 MiCOM P746 (FD) 9-5 All modules are connected by a parallel data and address bus that allows the processor board to send and receive information to and from the other modules as required. There is also a separate serial data bus for conveying sample data from the input module to the processor.
  • Page 264 P746/EN FD/G31 Firmware Design (FD) 9-6 MiCOM P746 Executable software Default settings & parameters, Alarm, event, fault, code & data, setting disturbance & language text, software code. database data maintenance Present values of all settings. records Battery Flash backed-up SRAM...
  • Page 265 Firmware Design P746/EN FD/G31 MiCOM P746 (FD) 9-7 1.2.4 Protection & control software The protection and control software performs the calculations for all of the protection algorithms of the relays. This includes digital signal processing such as Fourier filtering and ancillary tasks such as the measurements.
  • Page 266 P746/EN FD/G31 Firmware Design (FD) 9-8 MiCOM P746 HARDWARE MODULES The relay is based on a modular hardware design where each module performs a separate function within the relay operation. This section describes the functional operation of the various hardware modules.
  • Page 267 Firmware Design P746/EN FD/G31 MiCOM P746 (FD) 9-9 Input module The input module provides the interface between the processor board and the analogue and digital signals coming into the relay. The input module consists of two PCBs; the main input board and a transformer board.
  • Page 268 P746/EN FD/G31 Firmware Design (FD) 9-10 MiCOM P746 2.3.1 Transformer board The transformer board holds 3 voltage transformers (VTs) and 18 current transformers (CTs). The current inputs will accept either 1A or 5A nominal current (menu and wiring options) and the voltage inputs can be specified for either 110V or 440V nominal voltage (order option).
  • Page 269 Firmware Design P746/EN FD/G31 MiCOM P746 (FD) 9-11 2.3.3 Universal opto isolated logic inputs The P746 relay is fitted with universal opto isolated logic inputs that can be programmed for the nominal battery voltage of the circuit of which they are a part. i.e. thereby allowing different voltages for different circuits e.g.
  • Page 270 P746/EN FD/G31 Firmware Design (FD) 9-12 MiCOM P746 The watchdog facility provides two output relay contacts, one normally open and one normally closed that are driven by the processor board. These are provided to give an indication that the relay is in a healthy state.
  • Page 271 Firmware Design P746/EN FD/G31 MiCOM P746 (FD) 9-13 Auxiliary power supply The three input voltage options are the same as for main supply. The relay board is provided as an alone board. IRIG-B board The IRIG-B board is an order option that can be fitted in the P746 to provide an accurate timing reference for the relay.
  • Page 272 P746/EN FD/G31 Firmware Design (FD) 9-14 MiCOM P746 2.11 Ethernet and redundant Ethernet boards The optional Ethernet board (ZN0049) has 3 variants which support the IEC 61850 implementation: • 100 Mbits/s Fiber Optic + 10/100 Mbits/s Copper • 100 Mbits/s Fiber Optic + 10/100 Mbits/s Copper + modulated IRIG-B •...
  • Page 273 Firmware Design P746/EN FD/G31 MiCOM P746 (FD) 9-15 RELAY SOFTWARE The relay software was introduced in the overview of the relay at the start of this manual (P746/EN FD). The software can be considered to be made up of four sections: •...
  • Page 274 P746/EN FD/G31 Firmware Design (FD) 9-16 MiCOM P746 System services software As shown in Figure 8, the system services software provides the interface between the relay’s hardware and the higher-level functionality of the platform software and the protection & control software. For example, the system services software provides drivers for items...
  • Page 275 Firmware Design P746/EN FD/G31 MiCOM P746 (FD) 9-17 Protection and control software The protection and control software task is responsible for processing all of the protection elements and measurement functions of the relay. To achieve this it has to communicate with both the system services software and the platform software as well as organize its own operations.
  • Page 276 Firmware Design (FD) 9-18 MiCOM P746 create a pulse of fixed duration on the output regardless of the length of the pulse on the input. The outputs of the PSL are the LEDs on the front panel of the relay and the output contacts at the rear.
  • Page 277 Firmware Design P746/EN FD/G31 MiCOM P746 (FD) 9-19 SELF TESTING & DIAGNOSTICS The relay includes a number of self-monitoring functions to check the operation of its hardware and software when it is in service. These are included so that if an error or fault occurs within the relay’s hardware or software, the relay is able to detect and report the...
  • Page 278 P746/EN FD/G31 Firmware Design (FD) 9-20 MiCOM P746 4.1.3 Platform software initialization & monitoring In starting the platform software, the relay checks the integrity of the data held in non-volatile memory with a checksum, the operation of the real-time clock, and the IRIG-B board if fitted.

  • Page 279: P746/En Cm/F21

    Commissioning and Maintenance P746/EN CM/F21 MiCOM P746 COMMISSIONING AND MAINTENANCE Date: 2010 Hardware Suffix: Software Version: Connection Diagrams: 10P746xx...
  • Page 281 Commissioning and Maintenance P746/EN CM/F21 MiCOM P746 (CM) 10-1 CONTENTS INTRODUCTION SETTING FAMILIARISATION EQUIPMENT REQUIRED FOR COMMISSIONING Minimum equipment required Optional equipment PRODUCT CHECKS With the relay de-energised 4.1.1 Visual inspection 4.1.2 Current transformer shorting contacts 4.1.3 Insulation 4.1.4 External wiring 4.1.5...
  • Page 282 P746/EN CM/F21 Commissioning and Maintenance (CM) 10-2 MiCOM P746 FINAL CHECKS COMMISSIONING TEST RECORD SETTING RECORD...
  • Page 283 (CM) 10-3 INTRODUCTION The MiCOM P746 Busbar Differential Protection is fully numerical in its design, implementing all protection and non-protection functions in software. The relay employs a high degree of self-checking and, in the unlikely event of a failure, will give an alarm. As a result of this, the commissioning tests do not need to be as extensive as with non-numeric electronic or electromechanical relays.
  • Page 284 MiCOM P746 SETTING FAMILIARISATION When commissioning a MiCOM P746 Busbar protection for the first time, sufficient time should be allowed to become familiar with the method by which the settings are applied. The Introduction (P746/EN IT) contains a detailed description of the menu structure of P746 relay.
  • Page 285 Commissioning and Maintenance P746/EN CM/F21 MiCOM P746 (CM) 10-5 EQUIPMENT REQUIRED FOR COMMISSIONING Minimum equipment required Overcurrent test set with interval timer Multimeter with suitable ac current range, and ac and dc voltage ranges of 0 – 440V and 0 – 250V respectively...
  • Page 286 P746/EN CM/F21 Commissioning and Maintenance (CM) 10-6 MiCOM P746 PRODUCT CHECKS These product checks cover all aspects of the relay which should be checked to ensure that it has not been physically damaged prior to commissioning, is functioning correctly and all input quantity measurements are within the stated tolerances.
  • Page 287 Commissioning and Maintenance P746/EN CM/F21 MiCOM P746 (CM) 10-7 4.1.1 Visual inspection Carefully examine the relay to see that no physical damage has occurred since installation. The rating information given under the top access cover on the front of the relay should be checked to ensure it is correct for the particular installation.
  • Page 288 P746/EN CM/F21 Commissioning and Maintenance (CM) 10-8 MiCOM P746 P0149ENb Heavy duty terminal block Medium duty terminal block FIGURE 2: LOCATION OF SECURING SCREWS FOR HEAVY DUTY TERMINAL BLOCKS. Pull the terminal block away from the rear of the case and check with a continuity tester that all the shorting switches being used are closed.
  • Page 289 Commissioning and Maintenance P746/EN CM/F21 MiCOM P746 (CM) 10-9 4.1.3 Insulation Insulation resistance tests are only necessary during commissioning if it is required for them to be done and they have not been performed during installation. Isolate all wiring from the earth and test the insulation with an electronic or brushless insulation tester at a dc voltage not exceeding 500V.
  • Page 290 P746/EN CM/F21 Commissioning and Maintenance (CM) 10-10 MiCOM P746 4.1.6 Auxiliary supply The P746 relay can be operated from either a dc only or an ac/dc auxiliary supply depending on the relay’s nominal supply rating. The incoming voltage must be within the operating range specified in Table 3.
  • Page 291 Commissioning and Maintenance P746/EN CM/F21 MiCOM P746 (CM) 10-11 Check the time, date and month are correct in cell [DATE and TIME, Date/Time]. The IRIG-B signal does not contain the current year so it will need to be set manually in this cell.
  • Page 292 P746/EN CM/F21 Commissioning and Maintenance (CM) 10-12 MiCOM P746 − The ‘Green LED Status’ cell is an eighteen bit binary string that indicates which of the user-programmable LEDs on the relay are illuminated when accessing the relay from a remote location, a ‘1’ indicating a particular Green LED is lit.
  • Page 293 Commissioning and Maintenance P746/EN CM/F21 MiCOM P746 (CM) 10-13 Note: It should be ensured that thermal ratings of anything connected to the output relays during the contact test procedure is not exceeded by the associated output relay being operated for too long. It is therefore advised that the time between application and removal of contact test is kept to the minimum.
  • Page 294 P746/EN CM/F21 Commissioning and Maintenance (CM) 10-14 MiCOM P746 4.2.8.2 EIA(RS)485 configuration If an EIA(RS)485 to EIA(RS)232 converter (Schneider Electric CK222) is installed, connect a portable PC running the appropriate software (e.g. MiCOM S1 V2 or Studio) to the EIA(RS)232 side of the converter and the second rear communications port of the relay to the EIA(RS)485 side of the converter.
  • Page 295 Commissioning and Maintenance P746/EN CM/F21 MiCOM P746 (CM) 10-15 The measurement accuracy of the relay is ±5%. However, an additional allowance must be made for the accuracy of the test equipment being used. Corresponding CT Ratio Cell in MEASUREMENTS 1 column (02) (in ‘CT and VT RATIOS‘...
  • Page 296 P746/EN CM/F21 Commissioning and Maintenance (CM) 10-16 MiCOM P746 COMMISSIONING TEST MENU Test mode This cell is used to allow commissioning of busbar and general breaker failure protection. It also enables a facility to directly test the output contacts by applying menu controlled tests signals.
  • Page 297 Commissioning and Maintenance P746/EN CM/F21 MiCOM P746 (CM) 10-17 SETTING CHECKS The setting checks ensure that all of the application-specific relay settings (i.e. both the relay’s function and programmable scheme logic settings), for the particular installation, have been correctly applied to the relay.
  • Page 298 P746/EN CM/F21 Commissioning and Maintenance (CM) 10-18 MiCOM P746 6.2.1.1 Connect the test circuit The following tests require an injection test set, able to feed the relay with one or two currents variable in phase and magnitude. 6.2.1.1.1 If only one current is available:...
  • Page 299 Commissioning and Maintenance P746/EN CM/F21 MiCOM P746 (CM) 10-19 6.2.1.1.2 If 2 currents are available: This method will be preferred whenever possible. Note: The 2 CTs can have different ratios. This must be taken into account when injecting at the CT secondary side.
  • Page 300 P746/EN CM/F21 Commissioning and Maintenance (CM) 10-20 MiCOM P746 IMPORTANT: THIS TEST SIMULATES A CURRENT GOING OUT AND A CURRENT GOING IN THUS, THE CURRENT PHASE COMPARISON ALGORITHM WILL PREVENT THE TRIP AS LONG AS THE SMALLEST INJECTED CURRENT IS ABOVE X% OF THE NOMINAL CT CURRENT (IN): The chosen I must be lower than 2 x x% x In / (1- k2)*.
  • Page 301 Commissioning and Maintenance P746/EN CM/F21 MiCOM P746 (CM) 10-21 Note 2 : To test the Differential slopes ONLY: To check a slope of k%, the 2 following tests shall be performed. One showing no operation at m = 95% of k% and one showing operation at n = 105% of k%.
  • Page 302 P746/EN CM/F21 Commissioning and Maintenance (CM) 10-22 MiCOM P746 Example: Phase comparison threshold x% = 50%, Busbar protection bias slope k% = 60% (thus m% = 57% and n% = 63%) ID>2 = 1100 A (thus minimum bias current = ID>2/ k% = 1100 / 0.6 = 1834 A) CT1 = 1000/1 (thus): •...
  • Page 303 Commissioning and Maintenance P746/EN CM/F21 MiCOM P746 (CM) 10-23 Second test: • Keep the same I = 2 kA then Inject the same outgoing I and ingoing I for 10s. bias • Check on the P746 HMI Tool that the right I...
  • Page 304 P746/EN CM/F21 Commissioning and Maintenance (CM) 10-24 MiCOM P746 To test the Phase comparison pick-up only: When an unlatched Led or a unlatched output relay is mapped on a PhComp Blk Zx or PhComp Blk Zx Y ddb, the 2 following tests can be performed.
  • Page 305 Commissioning and Maintenance P746/EN CM/F21 MiCOM P746 (CM) 10-25 6.2.2 Phase Overcurrent Protection If the overcurrent protection function is being used, both Ι>1 and I>2 elements should be tested. To avoid spurious operation of any current differential, earth fault, breaker fail or CT supervision elements, these should be disabled for the duration of the overcurrent tests.
  • Page 306 P746/EN CM/F21 Commissioning and Maintenance (CM) 10-26 MiCOM P746 For all characteristics, allowance must be made for the accuracy of the test equipment being used. Characteristic Operating time at twice current setting and time multiplier/time dial setting of 1.0 Nominal (seconds) Range (seconds) [: Ι>1 Time Delay] setting...
  • Page 307 Commissioning and Maintenance P746/EN CM/F21 MiCOM P746 (CM) 10-27 6.2.3.2 External initiation of BF Protection Trip Command Trip A, B, C P746 Busbar protection P3752ENc To test the retrip: As shown in the above figure, we initiate the opto inputs “External Trip A,B,C” and apply a current twice the I<...
  • Page 308 P746/EN CM/F21 Commissioning and Maintenance (CM) 10-28 MiCOM P746 For example if tBF4 = 200ms and the fault is cleared in 500ms, the P746 will display 500ms. 6.2.3.4 Internal initiation Breaker Failure Protection This Breaker failure Protection can be initiated only by a trip command issued by the P746.
  • Page 309 Commissioning and Maintenance P746/EN CM/F21 MiCOM P746 (CM) 10-29 ON-LOAD CHECKS The objectives of the on-load checks are to: − Confirm the external wiring to the current inputs is correct. − Ensure the on-load differential current is well below the relay setting.
  • Page 310 P746/EN CM/F21 Commissioning and Maintenance (CM) 10-30 MiCOM P746 FINAL CHECKS The tests are now complete. Remove all test or temporary shorting leads, etc. If it has been necessary to disconnect any of the external wiring from the relay in order to perform the wiring verification tests, it should be ensured that all connections are replaced in accordance with the relevant external connection or scheme diagram.
  • Page 311 Commissioning and Maintenance P746/EN CM/F21 MiCOM P746 (CM) 10-31 COMMISSIONING TEST RECORD Date: Engineer: Station: Circuit: System Frequency: Front Plate Information Relay Type P746 Model number Serial number Rated current In Auxiliary voltage Vx Test Equipment Used This section should be completed to allow future identification of protective devices that have been commissioned using equipment that is later found to be defective or incompatible but may not be detected during the commissioning procedure.
  • Page 312 P746/EN CM/F21 Commissioning and Maintenance (CM) 10-32 MiCOM P746 *Delete as appropriate Have all relevant safety instructions been Yes/No* followed? Product Checks With the relay de-energised 4.1.1 Visual inspection Relay damaged? Yes/No* Rating information correct for installation? Yes/No* Case earth installed? Yes/No* 4.1.2...
  • Page 313 Commissioning and Maintenance P746/EN CM/F21 MiCOM P746 (CM) 10-33 4.2.3.2 Trip (red) LED working? Yes/No* 4.2.3.3 All 8 programmable LED’s working? Yes/No* 4.2.4 Field supply voltage Value measured between terminals 7 and 9 ______V dc Value measured between terminals 8 and 10 ______V dc 4.2.5...
  • Page 314 P746/EN CM/F21 Commissioning and Maintenance (CM) 10-34 MiCOM P746 Opto input 29 working? Yes/No/na* Opto input 30 working? Yes/No/na* Opto input 31 working? Yes/No/na* Opto input 32 working? Yes/No/na* Opto input 33 working? Yes/No/na* Opto input 34 working? Yes/No/na* Opto input 35 working?
  • Page 315 Commissioning and Maintenance P746/EN CM/F21 MiCOM P746 (CM) 10-35 Relay 12 Working? Yes/No* Contact resistance ____Ω/Not measured* Relay 13 Working? Yes/No* Contact resistance ____Ω/Not measured* Relay 14 Working? Yes/No* Contact resistance ____Ω/Not measured* Relay 15 Working? Yes/No* Contact resistance (N/C) ____Ω/Not measured*...
  • Page 316 P746/EN CM/F21 Commissioning and Maintenance (CM) 10-36 MiCOM P746 Relay 29 Working? Yes/No/na* Contact resistance ____Ω/Not measured* Relay 30 Working? Yes/No/na* Contact resistance ____Ω/Not measured* Relay 31 Working? Yes/No/na* Contact resistance (N/C) ____Ω/Not measured* (N/O) ____Ω/Not measured* Relay 32 Working?
  • Page 317 Commissioning and Maintenance P746/EN CM/F21 MiCOM P746 (CM) 10-37 Confirm current transformer wiring 7.1.2 Current connections CT wiring checked? Yes/No/na* CT polarities correct? Yes/No* Displayed current Primary/Secondary* Phase CT ratio _______ /na* Currents: Applied value Displayed value ΙA _______A _______A ΙB (one box mode)
  • Page 318 P746/EN CM/F21 Commissioning and Maintenance (CM) 10-38 MiCOM P746 SETTING RECORD Date: Engineer: Station: Circuit: System Frequency: Front Plate Information Type: P746 Model Number Serial Number Rated Current In Auxiliary Voltage Vx *Delete as appropriate Setting Groups Used Group 1...
  • Page 319 Commissioning and Maintenance P746/EN CM/F21 MiCOM P746 (CM) 10-39 0900 CONFIGURATION Setting Group Select via Menu/Select via Optos* Active Settings Group 1/Group 2/Group 3/Group 4* Setting Group 1 Disabled/Enabled* Setting Group 2 Disabled/Enabled* Setting Group 3 Disabled/Enabled* Setting Group 4...
  • Page 320 P746/EN CM/F21 Commissioning and Maintenance (CM) 10-40 MiCOM P746 T3 CT Secondary T4 CT Polarity Standard/inverted* T4 CT Primary T4 CT Secondary T5 CT Polarity Standard/inverted* T5 CT Primary T5 CT Secondary T6 CT Polarity Standard/inverted* T6 CT Primary T6 CT Secondary...
  • Page 321 Commissioning and Maintenance P746/EN CM/F21 MiCOM P746 (CM) 10-41 3 box T13 CT Polarity Standard/inverted* mode 3 box T13 CT Primary mode 3 box T13 CT Secondary mode 3 box T14 CT Polarity Standard/inverted* mode 3 box T14 CT Primary...
  • Page 322 P746/EN CM/F21 Commissioning and Maintenance (CM) 10-42 MiCOM P746 Protection Event Enabled/Disabled* Clear Dist Recs No/Yes* DDB 31 – 0 DDB 63 – 32 DDB 95 – 64 DDB 127 – 96 DDB 159 - 128 DDB 191 - 160...
  • Page 323 Commissioning and Maintenance P746/EN CM/F21 MiCOM P746 (CM) 10-43 DDB 1247 - 1216 DDB 1279 - 1248 DDB 1311 - 1280 DDB 1343 - 1312 DDB 1375 - 1344 DDB 1407 - 1376 DDB 1439 - 1408 DDB 1471 - 1440...
  • Page 324 P746/EN CM/F21 Commissioning and Maintenance (CM) 10-44 MiCOM P746 Analog Channel 10 Analog Channel 11 Analog Channel 12 Analog Channel 13 Analog Channel 14 Analog Channel 15 Analog Channel 16 Analog Channel 17 Analog Channel 18 Analog Channel 19 Analog Channel 20...
  • Page 325 Commissioning and Maintenance P746/EN CM/F21 MiCOM P746 (CM) 10-45 Digital Input 13 Input 13 trigger No trigger / Trigger L/H / Trigger H/L* Digital Input 14 Input 14 trigger No trigger / Trigger L/H / Trigger H/L* Digital Input 15...
  • Page 326 P746/EN CM/F21 Commissioning and Maintenance (CM) 10-46 MiCOM P746 Digital Input 33 Input 33 trigger No trigger / Trigger L/H / Trigger H/L* Digital Input 34 Input 34 trigger No trigger / Trigger L/H / Trigger H/L* Digital Input 35...
  • Page 327 Commissioning and Maintenance P746/EN CM/F21 MiCOM P746 (CM) 10-47 0F00 COMMISSION TESTS Opto I/P Status Opto I/P Status 2 Rly O/P Status Rly O/P Status 2 Test Port Status Monitor Bit 1 Monitor Bit 2 Monitor Bit 3 Monitor Bit 4...
  • Page 328 P746/EN CM/F21 Commissioning and Maintenance (CM) 10-48 MiCOM P746 DDB 799 - 768 DDB 831 - 800 DDB 863 - 832 DDB 895 - 864 DDB 927 - 896 DDB 959 - 928 DDB 991 - 960 DDB 1022 - 992...
  • Page 329 Commissioning and Maintenance P746/EN CM/F21 MiCOM P746 (CM) 10-49 1100 OPTOS CONFIG Global Nominal V Opto Filter Ctrl Opto Filter Ctr2 4B00 OUTPUT LABELS Group Settings Group 1 Group 2 Group 3 Group 4 Settings Settings Settings Settings Relay 1...
  • Page 330 P746/EN CM/F21 Commissioning and Maintenance (CM) 10-50 MiCOM P746 GROUP PROTECTION SETTINGS For Group 2, 3 or 4 the first address figure must be respectively: 5 and 6, 7and 8 or 9 and A 3000 SYSTEM CONFIG Group Settings Group 1...
  • Page 331 Commissioning and Maintenance P746/EN CM/F21 MiCOM P746 (CM) 10-51 Group Settings Group 1 Group 2 Group 3 Group 4 Settings Settings Settings Settings V< Set V< PickUpTimer V1< Status V1< Set V1< PickUpTimer V2> Status V2> Set V2> PickUpTimer VN> Status VN>...
  • Page 332 P746/EN CM/F21 Commissioning and Maintenance (CM) 10-52 MiCOM P746 Group 1 Settings Group 1 Group 2 Group 3 Group 4 Settings Settings Settings Settings US/IEEE I>1 Reset Char I>1 k(RI) UK/IEC I>1 TMS I>1 Time Delay I>1 tReset I>2 Function I>2 Current...
  • Page 333 Commissioning and Maintenance P746/EN CM/F21 MiCOM P746 (CM) 10-53 Group 1 Settings Group 1 Group 2 Group 3 Group 4 Settings Settings Settings Settings UK/IEC I>1 TMS I>1 Time Delay I>1 tReset I>2 Function I>2 Current I>2 Time delay TERMINAL 6 I>1 Function...
  • Page 334 P746/EN CM/F21 Commissioning and Maintenance (CM) 10-54 MiCOM P746 Group 1 Settings Group 1 Group 2 Group 3 Group 4 Settings Settings Settings Settings I>1 Time Delay I>1 tReset I>2 Function I>2 Current I>2 Time delay TERMINAL 9 I>1 Function I>1 Current...
  • Page 335 Commissioning and Maintenance P746/EN CM/F21 MiCOM P746 (CM) 10-55 Group 1 Settings Group 1 Group 2 Group 3 Group 4 Settings Settings Settings Settings I>2 Function I>2 Current I>2 Time delay TERMINAL 12 I>1 Function I>1 Current US/IEEE I>1 Time Dial US/IEEE I>1 Reset Char...
  • Page 336 P746/EN CM/F21 Commissioning and Maintenance (CM) 10-56 MiCOM P746 Group 1 Settings Group 1 Group 2 Group 3 Group 4 Settings Settings Settings Settings I>2 Time delay TERMINAL 15 I>1 Function I>1 Current US/IEEE I>1 Time Dial US/IEEE I>1 Reset Char I>1 k(RI)
  • Page 337 Commissioning and Maintenance P746/EN CM/F21 MiCOM P746 (CM) 10-57 Group 1 Settings Group 1 Group 2 Group 3 Group 4 Settings Settings Settings Settings I>1 Function I>1 Current US/IEEE I>1 Time Dial US/IEEE I>1 Reset Char I>1 k(RI) UK/IEC I>1 TMS I>1 Time Delay...
  • Page 338 P746/EN CM/F21 Commissioning and Maintenance (CM) 10-58 MiCOM P746 IN>2 Function IN>2 Current IN>2 Time delay TERMINAL 3 IN>1 Function IN>1 Current US/IEEE IN>1 Time Dial US/IEEE IN>1 Reset Char IN>1 k(RI) UK/IEC IN>1 TMS IN>1 Time Delay IN>1 IDG IS IN>1 tReset...
  • Page 339 Commissioning and Maintenance P746/EN CM/F21 MiCOM P746 (CM) 10-59 IN>2 Current IN>2 Time delay TERMINAL 6 IN>1 Function IN>1 Current US/IEEE IN>1 Time Dial US/IEEE IN>1 Reset Char IN>1 k(RI) UK/IEC IN>1 TMS IN>1 Time Delay IN>1 IDG IS IN>1 tReset IN>2 Function...
  • Page 340 P746/EN CM/F21 Commissioning and Maintenance (CM) 10-60 MiCOM P746 4A00 INPUT LABELS Group 1 Settings Group 1 Group 2 Group 3 Group 4 Settings Settings Settings Settings Opto Input 1 Opto Input 2 Opto Input 3 Opto Input 4 Opto Input 5...
  • Page 341 Commissioning and Maintenance P746/EN CM/F21 MiCOM P746 (CM) 10-61 Group 1 Settings Group 1 Group 2 Group 3 Group 4 Settings Settings Settings Settings Opto Input 38 Opto Input 39 Opto Input 40 4B00 OUTPUT LABELS Group 1 Settings Group 1...
  • Page 342 P746/EN CM/F21 Commissioning and Maintenance (CM) 10-62 MiCOM P746 Commissioning Engineer: Customer Witness: Date: Date:...
  • Page 343 Commissioning and Maintenance P746/EN CM/F21 MiCOM P746 (CM) 10-63 1100 OPTOS SETUP 1300 CTRL. I/P CONFIG. Ctrl I/P Status Control Input 1 Latched / Pulsed * Ctrl Command 1 Control Input 2 Latched / Pulsed * Ctrl Command 2 Control Input 3...
  • Page 344 P746/EN CM/F21 Commissioning and Maintenance (CM) 10-64 MiCOM P746 1300 CTRL. I/P CONFIG. Ctrl Command 19 Control Input 20 Latched / Pulsed * Ctrl Command 20 Control Input 21 Latched / Pulsed * Ctrl Command 21 Control Input 22 Latched / Pulsed *...
  • Page 345 Commissioning and Maintenance P746/EN CM/F21 MiCOM P746 (CM) 10-65 1700 FUNCTION KEYS Fn. Key 4 Disabled / Locked / Unlock * Fn. Key 4 Mode Toggled / Normal * Fn. Key 4 Label Fn. Key 5 Disabled / Locked / Unlock * Fn.
  • Page 346 P746/EN CM/F21 Commissioning and Maintenance (CM) 10-66 MiCOM P746 2900 CTRL. I/P LABELS Control Input 9 Control Input 10 Control Input11 Control Input 12 Control Input 13 Control Input 14 Control Input 15 Control Input 16 Control Input 17 Control Input 18...

  • Page 347: P746/En Mt/A11

    Maintenance P746/EN MT/A11 MiCOM P746 MAINTENANCE Date: 2008 Hardware Suffix: Software Version: Connection Diagrams: 10P746xx (xx = 01 to 07)
  • Page 348 P746/EN MT/A11 Maintenance MiCOM P746...
  • Page 349 Maintenance P746/EN MT/A11 MiCOM P746 (MT) 11-1 CONTENTS MAINTENANCE Maintenance period Maintenance checks 1.2.1 Alarms 1.2.2 Opto-isolators 1.2.3 Output relays 1.2.4 Measurement accuracy Method of repair 1.3.1 Replacing the complete relay 1.3.2 Replacing a PCB Recalibration 1.4.1 P746 relay Changing the relay battery 1.5.1...
  • Page 350 P746/EN MT/A11 Maintenance (MT) 11-2 MiCOM P746 BLANK PAGE...
  • Page 351 Schneider Electric protective relays are designed for a life in excess of 20 years. MiCOM P746 current differential relays are self-supervising and so require less maintenance than earlier designs of relay. Most problems will result in an alarm so that remedial action can be taken.
  • Page 352 P746/EN MT/A11 Maintenance (MT) 11-4 MiCOM P746 Method of repair If the relay should develop a fault whilst in service, depending on the nature of the fault, the watchdog contacts will change state and an alarm condition will be flagged. Due to the extensive use of surface-mount components faulty PCBs should be replaced as it is not possible to perform repairs on damaged circuits.
  • Page 353 Maintenance P746/EN MT/A11 MiCOM P746 (MT) 11-5 Without exerting excessive force or damaging the scheme wiring, pull the terminal blocks away from their internal connectors. Remove the screws used to fasten the relay to the panel, rack, etc. These are the screws with the larger diameter heads that are accessible when the access covers are fitted and open.
  • Page 354 P746/EN MT/A11 Maintenance (MT) 11-6 MiCOM P746 Note: The numbers above the case outline identify the guide slot reference for each printed circuit board. Each printed circuit board has a label stating the corresponding guide slot number to ensure correct re-location after removal.
  • Page 355 Maintenance P746/EN MT/A11 MiCOM P746 (MT) 11-7 1.3.2.1 Replacement of the main processor board ESD precautions should be taken to avoid damage to the microprocessor based circuits. The main processor board is located in the front panel, not within the case as with all the other PCBs.
  • Page 356 P746/EN MT/A11 Maintenance (MT) 11-8 MiCOM P746 1.3.2.2 Replacement of the optional board in P746 To replace a faulty board, disconnect all connections at the rear of the relay. The board is secured in the case by two screws accessible from the rear of the relay, one at the top and another at the bottom, as shown in Figure 5.
  • Page 357 Maintenance P746/EN MT/A11 MiCOM P746 (MT) 11-9 ZN0007 SERIAL No. P3009FRa FIGURE 5: TYPICAL IRIG-B BOARD Before fitting the replacement PCB check that the number on the round label adjacent to the front edge of the PCB matches the slot number into which it will be fitted. If the slot number is missing or incorrect write the correct slot number on the label.
  • Page 358 P746/EN MT/A11 Maintenance (MT) 11-10 MiCOM P746 P3937ENa FIGURE 6: SIGMA DELTA INPUT BOARD FIGURE 7: TRANSFORMER PCB On the right-hand side of the sigma delta input module, there is a small metal tab (figure 8) which brings out a handle. Grasping this handle firmly, pull the module forward, away from the rear terminal blocks.
  • Page 359 Maintenance P746/EN MT/A11 MiCOM P746 (MT) 11-11 Before fitting the replacement module check that the number on the round label adjacent to the front edge of the PCB matches the slot number into which it will be fitted. If the slot number is missing or incorrect write the correct slot number on the label.
  • Page 360 P746/EN MT/A11 Maintenance (MT) 11-12 MiCOM P746 Slot the power supply module back into the relay case, ensuring that it is pushed fully back on to the rear terminal blocks. Refit the front panel using the reverse procedure to that given in section. After refitting and closing the access covers on size 80TE cases, press at the location of the hinge-assistance T-pieces so that they click back into the front panel moulding.
  • Page 361 Maintenance P746/EN MT/A11 MiCOM P746 (MT) 11-13 1.3.2.6 Replacement of the opto and separate relay boards To remove either, gently pull the faulty PCB forward and out of the case. If the relay board is being replaced, ensure the setting of the link (located above IDC connector) on the replacement relay board is the same as the one being replaced.
  • Page 362 P746/EN MT/A11 Maintenance (MT) 11-14 MiCOM P746 Recalibration 1.4.1 P746 relay Recalibration is not required when a PCB is replaced unless it happens to be one of the boards in the input module, the replacement of either directly affects the calibration.
  • Page 363 Maintenance P746/EN MT/A11 MiCOM P746 (MT) 11-15 Cleaning Before cleaning the equipment ensure that all ac and dc supplies, current transformer and voltage transformer connections are isolated to prevent any chance of an electric shock whilst cleaning. The equipment may be cleaned using a lint-free cloth dampened with clean water. The use of detergents, solvents or abrasive cleaners is not recommended as they may damage the relay’s surface and leave a conductive residue.
  • Page 364 P746/EN MT/A11 Maintenance (MT) 11-16 MiCOM P746 BLANK PAGE...

  • Page 365: P746/En Ts/G31

    Troubleshooting P746/EN TS/G31 MiCOM P746 TROUBLESHOOTING Date: 2011 Hardware Suffix: Software Version: Connection Diagrams: 10P746xx (xx = 01 to 07)
  • Page 366 P746/EN TS/G31 Troubleshooting MiCOM P746...
  • Page 367 Troubleshooting P746/EN TS/G31 MiCOM P746 (TS) 12-1 CONTENTS INTRODUCTION INITIAL PROBLEM IDENTIFICATION POWER UP ERRORS ERROR MESSAGE/CODE ON POWER-UP OUT OF SERVICE LED ILLUMINATED ON POWER UP ERROR CODE DURING OPERATION MAL-OPERATION OF THE RELAY DURING TESTING Failure of output contacts...
  • Page 368 P746/EN TS/G31 Troubleshooting (TS) 12-2 MiCOM P746 BLANK PAGE...
  • Page 369 Troubleshooting P746/EN TS/G31 MiCOM P746 (TS) 12-3 INTRODUCTION Before carrying out any work on the equipment, the user should be familiar with the contents of the safety section/safety guide SFTY/4LM/E11 or later issue, the technical data section and the ratings on the equipment rating label The purpose of this section of the service manual is to allow an error condition on the relay to be identified so that appropriate corrective action can be taken.
  • Page 370 P746/EN TS/G31 Troubleshooting (TS) 12-4 MiCOM P746 INITIAL PROBLEM IDENTIFICATION Consult the table below to find the description that best matches the problem experienced, then consult the section referenced to perform a more detailed analysis of the problem. Symptom Refer To...
  • Page 371 Troubleshooting P746/EN TS/G31 MiCOM P746 (TS) 12-5 POWER UP ERRORS If the relay does not appear to power up then the following procedure can be used to determine whether the fault is in the external wiring, auxiliary fuse, power supply module of the relay or the relay front panel.
  • Page 372 P746/EN TS/G31 Troubleshooting (TS) 12-6 MiCOM P746 ERROR MESSAGE/CODE ON POWER-UP During the power-up sequence of the relay self-testing is performed as indicated by the messages displayed on the LCD. If an error is detected by the relay during these self-tests then an error message will be displayed and the power-up sequence will be halted.
  • Page 373 Troubleshooting P746/EN TS/G31 MiCOM P746 (TS) 12-7 OUT OF SERVICE LED ILLUMINATED ON POWER UP Test Check Action Using the relay menu confirm If the setting is Enabled then disable the test whether the Commission Test/Test mode and, verify that the Out of Service LED Mode setting is Enabled.
  • Page 374 P746/EN TS/G31 Troubleshooting (TS) 12-8 MiCOM P746 ERROR CODE DURING OPERATION The relay performs continuous self-checking, if an error is detected then an error message will be displayed, a maintenance record will be logged and the relay will reset (after a 1.6 second delay).
  • Page 375 Troubleshooting P746/EN TS/G31 MiCOM P746 (TS) 12-9 Hex Code Decimal Code Meaning 0x0C160013 202768403 The continuous self-checks have found an error in the code comparison. Check the Flash EPROM on the main processor board, and then try downloading a new program.
  • Page 376 P746/EN TS/G31 Troubleshooting (TS) 12-10 MiCOM P746 MAL-OPERATION OF THE RELAY DURING TESTING Failure of output contacts An apparent failure of the relay output contacts may be caused by the relay configuration; the following tests should be performed to identify the real cause of the failure. Note that the relay self-tests verify that the coil of the contact has been energized, an error will be displayed if there is a fault in the output relay board.
  • Page 377 Troubleshooting P746/EN TS/G31 MiCOM P746 (TS) 12-11 Incorrect analog signals The measurements may be configured in primary or secondary to assist. If it is suspected that the analog quantities being measured by the relay are not correct then the measurement function of the relay can be used to verify the nature of the problem.
  • Page 378 P746/EN TS/G31 Troubleshooting (TS) 12-12 MiCOM P746 REPAIR AND MODIFICATION PROCEDURE Please follow these 5 steps to return an Automation product to us: 1. Get the Repair and Modification Authorization Form (RMA) Find a copy of the RMA form at the end of this section.
  • Page 379 REPAIR/MODIFICATION RETURN AUTHORIZATION FORM FIELDS IN GREY TO BE FILLED IN BY SCHNEIDER ELECTRIC PERSONNEL ONLY Reference RMA: Date: Repair Center Address (for shipping) Service Type LSC PO No.: Retrofit Warranty Paid service Under repair contract Wrong supply Schneider Electric - Local Contact Details Name: Telephone No.: Fax No.:...
  • Page 380 Description of Failure Observed or Modification Required - Please be specific FOR REPAIRS ONLY Would you like us to install an updated firmware version after repair? CUSTOMS & INVOICING INFORMATION Required to allow return of repaired items Value for Customs (M) Customer Invoice Address ((M) if paid) Customer Return Delivery Address (full street address) (M)

  • Page 381: P746/En Sc/G31

    SCADA Communications P746/EN SC/G31 MiCOM P746 SCADA COMMUNICATIONS Date: 2011 Hardware Suffix: Software Version: Connection Diagrams: 10P746xx (xx = 01 to 07)
  • Page 382 P746/EN SC/G31 SCADA Communications MiCOM P746...
  • Page 383 SCADA Communications P746/EN SC/G31 MiCOM P746 (SC) 13-1 CONTENTS SCADA COMMUNICATIONS Introduction Rear port information and connection advice – EIA(RS)485 protocols 1.2.1 Rear communication port EIA(RS)485 interface 1.2.2 Courier communication 1.2.3 MODBUS communication 1.2.4 IEC60870-5 CS 103 communication 1.2.5 DNP3.0 communication...
  • Page 384 P746/EN SC/G31 SCADA Communications (SC) 13-2 MiCOM P746 Register mapping Event extraction 3.5.1 Manual selection 3.5.2 Automatic extraction 3.5.3 Record data Disturbance record extraction 3.6.1 Description 3.6.2 Procedure 3.6.3 Extracting the disturbance data Setting changes 3.7.1 Password protection 3.7.2 Control and support settings 3.7.3...
  • Page 385 SCADA Communications P746/EN SC/G31 MiCOM P746 (SC) 13-3 Object 1 binary inputs Object 10 binary outputs Object 20 binary counters Object 30 analog input DNP3.0 configuration using MiCOM S1 5.7.1 Object 1 5.7.2 Object 20 5.7.3 Object 30 IEC 61850 ETHERNET INTERFACE...
  • Page 386 P746/EN SC/G31 SCADA Communications (SC) 13-4 MiCOM P746 FIGURES FIGURE 1: EIA(RS)485 BUS CONNECTION ARRANGEMENTS FIGURE 2: REMOTE COMMUNICATION CONNECTION ARRANGEMENTS FIGURE 3: ETHERNET CONNEXION EXAMPLE FIGURE 4: ETHERNET CONNEXION FIGURE 5: MANUAL SELECTION OF A DISTURBANCE RECORD FIGURE 6: AUTOMATIC SELECTION OF A DISTURBANCE – OPTION 1 FIGURE 7: AUTOMATIC SELECTION OF A DISTURBANCE –...
  • Page 387 SCADA Communications P746/EN SC/G31 MiCOM P746 (SC) 13-5 SCADA COMMUNICATIONS Introduction This section outlines the remote communications interfaces of the MiCOM relay. The relay supports a choice of one of five protocols via the rear communication interface, selected via the model number when ordering. This is in addition to the front serial interface and 2 rear communications port, which supports the Courier protocol only.
  • Page 388 P746/EN SC/G31 SCADA Communications (SC) 13-6 MiCOM P746 1.2.1.3 Bus connections & topologies The EIA(RS)485 standard requires that each device be directly connected to the physical cable that is the communications bus. Stubs and tees are expressly forbidden, as are star topologies.
  • Page 389 SCADA Communications P746/EN SC/G31 MiCOM P746 (SC) 13-7 It is possible to use the products field voltage output (48V DC) to bias the bus using values of 2.2kΩ (½W) as bias resistors instead of the 180Ω resistors shown in the above diagram.
  • Page 390 P746/EN SC/G31 SCADA Communications (SC) 13-8 MiCOM P746 Having made the physical connection to the relay, the relay’s communication settings must be configured. To do this use the keypad and LCD user interface. In the relay menu firstly check that the ‘Comms. settings’ cell in the ‘Configuration’ column is set to ‘Visible’, then move to the ‘Communications’...
  • Page 391 SCADA Communications P746/EN SC/G31 MiCOM P746 (SC) 13-9 1.2.4 IEC60870-5 CS 103 communication The IEC specification IEC60870-5-103: Telecontrol Equipment and Systems, Part 5: Transmission Protocols Section defines standards IEC60870-5-1 to IEC60870-5-5 to perform communication with protection equipment. The standard configuration for the IEC60870-5-103 protocol is to use a twisted pair EIA(RS)485 connection over distances up to 1000m.
  • Page 392 P746/EN SC/G31 SCADA Communications (SC) 13-10 MiCOM P746 The next cell down controls the comms. port address. RP2 address Since up to 32 relays can be connected to one K-bus spur, as indicated in Figure 2, it is necessary for each relay to have a unique address so that messages from the master control station are accepted by one relay only.
  • Page 393 SCADA Communications P746/EN SC/G31 MiCOM P746 (SC) 13-11 1.4.2 IEC 61850-8.1 Protocol P746 IEC 61850-8.1 Fibre/Copper PC with MiCOM S1 AND/OR Ethernet Ethernet All: Measurments, Settings, PSL, events, Disturbance Records P746 Ethernet Switch P746 P746 P3929ENb FIGURE 4: ETHERNET CONNEXION...
  • Page 394 P746/EN SC/G31 SCADA Communications (SC) 13-12 MiCOM P746 COURIER INTERFACE Courier protocol K-Bus is based on EIA(RS)485 voltage levels with HDLC FM0 encoded synchronous signalling and its own frame format. The K-Bus twisted pair connection is unpolarized, whereas the EIA(RS)485 and EIA(RS)232 interfaces are polarized.
  • Page 395 SCADA Communications P746/EN SC/G31 MiCOM P746 (SC) 13-13 Setting Changes Enter Setting Mode Preload Setting Abort Setting Execute Setting Reset Menu Cell Set Value Control Commands Select Setting Group Change Device Address* Set Real Time Note: Commands indicated with a * are not supported via the front Courier port.
  • Page 396 P746/EN SC/G31 SCADA Communications (SC) 13-14 MiCOM P746 Setting changes (See R6512, Courier User Guide - Chapter 9) There are three categories of settings within the relay database: − Control and support − Disturbance recorder − Protection settings group Setting changes made to the control and support settings are implemented immediately and stored in non-volatile memory.
  • Page 397 SCADA Communications P746/EN SC/G31 MiCOM P746 (SC) 13-15 2.5.2 Event types Events will be created by the relay under the following circumstances: − Change of state of output contact − Change of state of opto input − Protection element operation −...
  • Page 398 P746/EN SC/G31 SCADA Communications (SC) 13-16 MiCOM P746 Maintenance Record Selection (Row F0) – This cell can be used to select a maintenance record using a value between 0 and 4 and operates in a similar way to the fault record selection.
  • Page 399 SCADA Communications P746/EN SC/G31 MiCOM P746 (SC) 13-17 MODBUS INTERFACE The MODBUS interface is a master/slave protocol and it is defined by MODBUS.org: See www.modbus.org MODBUS Serial Protocol Reference Guide: PI-MBUS-300 Rev. E Communication link This interface also uses the rear EIA(RS)485 port (or converted fiber optic port) for communication using ‘RTU’...
  • Page 400 P746/EN SC/G31 SCADA Communications (SC) 13-18 MiCOM P746 Response codes Code MODBUS Description MiCOM Interpretation Illegal Function Code function code transmitted supported by the slave. Illegal Data Address The start data address in the request is not an allowable value. If any of the addresses in...
  • Page 401 SCADA Communications P746/EN SC/G31 MiCOM P746 (SC) 13-19 3.5.1 Manual selection There are three registers available to manually select stored records, there are also three read only registers allowing the number of stored records to be determined. 40100 - Select Event, 0 to 249...
  • Page 402 P746/EN SC/G31 SCADA Communications (SC) 13-20 MiCOM P746 Event MODBUS Length Comments Description Address Event Index 30111 This register will contain the DDB ordinal for protection events or the bit number for alarm events. The direction of the change will be indicated by the most significant bit;...
  • Page 403 SCADA Communications P746/EN SC/G31 MiCOM P746 (SC) 13-21 MODBUS Register Name Description 3x00800 of stored Indicates the total number of disturbance disturbances records currently stored in the relay, both extracted and unextracted. 3x00801 Unique identifier of Indicates the unique identifier value for...
  • Page 404 P746/EN SC/G31 SCADA Communications (SC) 13-22 MiCOM P746 The disturbance record status register will report one of the following values: State Description Idle This will be the state reported when no record is selected; such as after power on or after a record has been marked as extracted.
  • Page 405 SCADA Communications P746/EN SC/G31 MiCOM P746 (SC) 13-23 3.6.2.1 Manual extraction procedure The procedure used to extract a disturbance manually is shown in the following figure. The manual method of extraction does not allow for the acceptance of disturbance records.
  • Page 406 P746/EN SC/G31 SCADA Communications (SC) 13-24 MiCOM P746 3.6.2.3 Automatic extraction procedure – option 1 The procedure for the first method is shown in the following figure. This also shows the acceptance of the disturbance record once the extraction is complete.
  • Page 407 SCADA Communications P746/EN SC/G31 MiCOM P746 (SC) 13-25 3.6.2.4 Automatic extraction procedure – option 2 The second method that can be used for automatic extraction is shown in the following figure. This also shows the acceptance of the disturbance record once the extraction is...
  • Page 408 P746/EN SC/G31 SCADA Communications (SC) 13-26 MiCOM P746 3.6.3 Extracting the disturbance data The extraction of the disturbance record, as shown in the three figures above, is a two-stage process that involves extracting the configuration file first and then the data file.
  • Page 409 SCADA Communications P746/EN SC/G31 MiCOM P746 (SC) 13-27 The following figure shows how the data file is extracted: Start (Configuration Complete) To parent procedure Send 'Select Data File' to register 4x00400 Read DR status value from register 3x00934 Busy Check DR Status For...
  • Page 410 P746/EN SC/G31 SCADA Communications (SC) 13-28 MiCOM P746 Setting changes The relay settings can be split into two categories: − Control and support settings − Disturbance record settings and protection setting groups Changes to settings within the control and support area are executed immediately. Changes to the protection setting groups or the disturbance recorder settings are stored in a temporary ‘scratchpad’...
  • Page 411 SCADA Communications P746/EN SC/G31 MiCOM P746 (SC) 13-29 In addition to the basic editing of the protection setting groups, the following functions are provided: − Default values can be restored to a setting group or to all of the relay settings by writing to register 40402.
  • Page 412 SCADA Communications (SC) 13-30 MiCOM P746 Since the range of the data type is only 100 years, the century must be deduced. The century is calculated as the one that will produce the nearest time value to the current date.
  • Page 413 SCADA Communications P746/EN SC/G31 MiCOM P746 (SC) 13-31 The multiplier is derived from the VT and CT ratios set in the relay, with the equation ((CT Primary) × (VT Primary)/110V). Thus, the G27 part of the value will equal 1. Hence the overall value of the G29 register set is 64×1 = 64W...
  • Page 414 P746/EN SC/G31 SCADA Communications (SC) 13-32 MiCOM P746 IEC60870-5-103 INTERFACE The IEC60870-5-103 interface is a master/slave interface with the relay as the slave device. The relay conforms to compatibility level 2; compatibility level 3 is not supported. The following IEC60870-5-103 facilities are supported by this interface: −...
  • Page 415 SCADA Communications P746/EN SC/G31 MiCOM P746 (SC) 13-33 Spontaneous events Events are categorized using the following information: − Function type − Information number The IEC60870-5-103 profile in the menu database, P746/EN MD, contains a complete listing of all events produced by the relay.
  • Page 416 P746/EN SC/G31 SCADA Communications (SC) 13-34 MiCOM P746 DNP3.0 INTERFACE DNP3.0 protocol The descriptions given here are intended to accompany the device profile document that is included in the menu database, P746/EN MD. The DNP3.0 protocol is not described here, please refer to the documentation available from the user group.
  • Page 417 SCADA Communications P746/EN SC/G31 MiCOM P746 (SC) 13-35 Object 20 binary counters Object 20, binary counters, contains cumulative counters and measurements. The binary counters can be read as their present ‘running’ value from object 20, or as a ‘frozen’ value from object 21.
  • Page 418 P746/EN SC/G31 SCADA Communications (SC) 13-36 MiCOM P746 5.7.2 Object 20 The running counter value of object 20 points can be configured to be in or out of class 0. Any running counter that is in class 0 can have its frozen value selected to be in or out of the DNP3.0 response, but a frozen counter cannot be included without the corresponding...
  • Page 419 SCADA Communications P746/EN SC/G31 MiCOM P746 (SC) 13-37 IEC 61850 ETHERNET INTERFACE Introduction IEC 61850 is the international standard for Ethernet-based communication in substations. It enables integration of all protection, control, measurement and monitoring functions within a substation, and additionally provides the means for interlocking and inter-tripping. It combines the convenience of Ethernet with the security which is essential in substations today.
  • Page 420 P746/EN SC/G31 SCADA Communications (SC) 13-38 MiCOM P746 6.2.2 The data model To ease understanding, the data model of any IEC 61850 IED can be viewed as a hierarchy of information. The categories and naming of this information is standardized in the IEC 61850 specification.
  • Page 421 SCADA Communications P746/EN SC/G31 MiCOM P746 (SC) 13-39 Support for time synchronization over an Ethernet link Time synchronization is supported using SNTP (Simple Network Time Protocol); this protocol is used to synchronize the internal real time clock of the relays.
  • Page 422 P746/EN SC/G31 SCADA Communications (SC) 13-40 MiCOM P746 6.3.2.2 Network connectivity Note: This section presumes a prior knowledge of IP addressing and related topics. Further details on this topic may be found on the Internet (search for IP Configuration) and in numerous relevant books.
  • Page 423 SCADA Communications P746/EN SC/G31 MiCOM P746 (SC) 13-41 6.6.1 Scope A maximum of 32 virtual inputs are available within the PSL which can be mapped directly to a published dataset in a GOOSE message (only 1 fixed dataset is supported). All published GOOSE signals are BOOLEAN values.
  • Page 424 P746/EN SC/G31 SCADA Communications (SC) 13-42 MiCOM P746 BLANK PAGE...

  • Page 425: P746/En Sg/F21

    Symbols and Glossary P746/EN SG/F21 MiCOM P746 SYMBOLS AND GLOSSARY Date: 2008 Hardware Suffix: Software Version: Connection Diagrams: 10P746xx (xx = 01 to 07)
  • Page 426 P746/EN SG/F21 Symbols and Glossary MiCOM P746...
  • Page 427 Symbols and Glossary P746/EN SG/F21 MiCOM P746 (SG) 14-1 Logic Symbols used Symbols Explanation & Logical “AND”: Used in logic diagrams to show an AND-gate function. Σ “Sigma”: Used to indicate a summation, such as cumulative current interrupted. τ “Tau”: Used to indicate a time constant, often associated with thermal characteristics.
  • Page 428 P746/EN SG/F21 Symbols and Glossary (SG) 14-2 MiCOM P746 Symbols Explanation Current transformer supervision: To detect CT input failure. Abbreviation of “Check Zone”: Zone taking into account only the feeders. Digital data bus within the programmable scheme logic: A logic point that has a zero or 1 status. DDB signals are mapped in logic to customize the relay’s operation.
  • Page 429 Symbols and Glossary P746/EN SG/F21 MiCOM P746 (SG) 14-3 Symbols Explanation Human Machine Interface: The graphical user interface of the control system. Current. ∧ Current raised to a power: Such as when breaker statistics monitor the square of ruptured current squared ∧...
  • Page 430 P746/EN SG/F21 Symbols and Glossary (SG) 14-4 MiCOM P746 Symbols Explanation IDMT Inverse definite minimum time: A characteristic whose trip time depends on the measured input (e.g. current) according to an inverse-time curve. IDN>1 Minimum pick-up neutral circuitry fault threshold.
  • Page 431 Symbols and Glossary P746/EN SG/F21 MiCOM P746 (SG) 14-5 Symbols Explanation Model Implementation Conformance Specification: MICS Defines the IEC 61850 data model implemented in an IED. Manufacturing Message Specification: A protocol used to transport the data of IEC 61850 across an Ethernet network.
  • Page 432 P746/EN SG/F21 Symbols and Glossary (SG) 14-6 MiCOM P746 Symbols Explanation R Gnd. A distance zone resistive reach setting: Used for ground (earth) faults. Lead burden for the neutral. Lead burden for the phases. RBPh Abbreviation of “Relay Characteristic Angle”: The centre of the directional characteristic.
  • Page 433 Symbols and Glossary P746/EN SG/F21 MiCOM P746 (SG) 14-7 Symbols Explanation V<2 Second stage of undervoltage protection: Could be labelled 27-2 in ANSI terminology. V> An overvoltage element. V>1 First stage of overvoltage protection: Could be labelled 59-1 in ANSI terminology.
  • Page 434 P746/EN SG/F21 Symbols and Glossary (SG) 14-8 MiCOM P746 Logic Timers Logic Explanation Time Chart Symbols INPUT OUTPUT Delay on pick-up timer, t INPUT OUTPUT INPUT OUTPUT Delay on drop-off timer, t INPUT OUTPUT INPUT OUTPUT Delay on pick-up/drop-off timer...
  • Page 435 Symbols and Glossary P746/EN SG/F21 MiCOM P746 (SG) 14-9 Logic Explanation Time Chart Symbols INPUT Dwell OUTPUT Dwell timer Timer INPUT OUTPUT INPUT Straight (non latching): Straight Hold value until input reset signal OUTPUT...
  • Page 436 P746/EN SG/F21 Symbols and Glossary (SG) 14-10 MiCOM P746 Logic Gates AND GATE Symbol Truth Table Symbol Truth Table Symbol Truth Table & & & OR GATE Symbol Truth Table Symbol Truth Table Symbol Truth Table R - S FLIP-FLOP...

  • Page 437: P746/En In/G31

    Installation P746/EN IN/G31 MiCOM P746 INSTALLATION Date: 2011 Hardware Suffix: Software Version: Connection Diagrams: 10P746xx...
  • Page 439 Installation P746/EN IN/G31 MiCOM P746 (IN) 15-1 CONTENTS RECEIPT OF RELAYS HANDLING OF ELECTRONIC EQUIPMENT STORAGE UNPACKING RELAY MOUNTING Rack mounting Panel mounting RELAY WIRING Medium and heavy duty terminal block connections RS485 port IRIG-B connections RS232 port Download/monitor port...
  • Page 440 P746/EN IN/G31 Installation (IN) 15-2 MiCOM P746 BLANK PAGE...
  • Page 441 Installation P746/EN IN/G31 MiCOM P746 (IN) 15-3 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 external damage has been sustained in transit.
  • Page 442 P746/EN IN/G31 Installation (IN) 15-4 MiCOM P746 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, although not always immediately apparent, will reduce the reliability of the circuit.
  • Page 443 Installation P746/EN IN/G31 MiCOM P746 (IN) 15-5 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 is exposed to ambient conditions and may be restored by gently heating the bag for about an hour prior to replacing it in the carton.
  • Page 444 P746/EN IN/G31 Installation (IN) 15-6 MiCOM P746 UNPACKING Care must be taken when unpacking and installing the relays so that none of the parts are damaged and additional components are not accidentally left in the packing or lost. Note: With the lower access cover open, the red tab of the battery isolation strip will be seen protruding from the positive side of the battery compartment.
  • Page 445 Installation P746/EN IN/G31 MiCOM P746 (IN) 15-7 RELAY MOUNTING MiCOM relays are dispatched either individually or as part of a panel/rack assembly. Individual relays are normally supplied with an outline diagram showing the dimensions for panel cut-outs and hole centres. This information can also be found in the product publication.
  • Page 446 P746/EN IN/G31 Installation (IN) 15-8 MiCOM P746 Rack mounting MiCOM relays may be rack mounted using single tier rack frames (our part number FX0121 001), as illustrated in Figure 2. These frames have been designed to have dimensions in accordance with IEC60297 and are supplied pre-assembled ready to use. On a standard 483mm (19”) rack system this enables combinations of widths of case up to a total...
  • Page 447 Installation P746/EN IN/G31 MiCOM P746 (IN) 15-9 Panel mounting The relays can be flush mounted into panels using M4 SEMS Taptite self-tapping screws with captive 3mm thick washers (also known as a SEMS unit). These fastenings are available in packs of 5 (our part number ZA0005 104).
  • Page 448 P746/EN IN/G31 Installation (IN) 15-10 MiCOM P746 RELAY WIRING Before carrying out any work on the equipment, the user should be familiar with the contents of the safety section/safety guide SFTY/4LM/E11 or later issue, the technical data section and the ratings on the equipment rating label.”...
  • Page 449 Installation P746/EN IN/G31 MiCOM P746 (IN) 15-11 IRIG-B connections The IRIG-B input and BNC connector have a characteristic impedance of 50Ω. It is recommended that connections between the IRIG-B equipment and the relay are made using coaxial cable of type RG59LSF with a halogen free, fire retardant sheath.
  • Page 450 P746/EN IN/G31 Installation (IN) 15-12 MiCOM P746 MiCOM P746 FIGURE 3: MiCOM P746 (80TE) – HARDWARE DESCRIPTION...
  • Page 451 D – Sigma Delta analogue input board K – Relay \ high break E – Sigma Delta Opto Board L – Relay board F – Sigma Delta analogue input board M – Power supply board FIGURE 4: MiCOM P746 (80TE) – REAR VIEW...
  • Page 452 D – Sigma Delta analogue input board K – Relay \ high break E – Sigma Delta Opto Board L – Relay board F – Sigma Delta analogue input board M – Power supply board FIGURE 5: MiCOM P746 (80TE) – REAR VIEW...
  • Page 453 Installation P746/EN IN/G31 MiCOM P746 (IN) 15-15 10P74600-1 FIGURE 6: MiCOM P746 (80TE) – CONNECTION DIAGRAM 1/2...
  • Page 454 P746/EN IN/G31 Installation (IN) 15-16 MiCOM P746 10P746000-2 FIGURE 7: MiCOM P746 (80TE) – CONNECTION DIAGRAM 2/2...
  • Page 455 Installation P746/EN IN/G31 MiCOM P746 (IN) 15-17 10P74601-1 FIGURE 8: MiCOM P746 (80TE) – WIRING DESCRIPTION (P746xxxA)
  • Page 456 P746/EN IN/G31 Installation (IN) 15-18 MiCOM P746 10P74602-1 FIGURE 9: MiCOM P746 (80TE) – WIRING DESCRIPTION (P746xxxB)
  • Page 457 Installation P746/EN IN/G31 MiCOM P746 (IN) 15-19 10P74603-1 FIGURE 10: MiCOM P746 (80TE) – WIRING DESCRIPTION (P746xxxC)
  • Page 458 P746/EN IN/G31 Installation (IN) 15-20 MiCOM P746 P3949Ena FIGURE 11: MiCOM P746 (80TE) – WIRING DESCRIPTION (P746xxxD)
  • Page 459 Installation P746/EN IN/G31 MiCOM P746 (IN) 15-21 10P74605-1 FIGURE 12: MiCOM P746 (80TE) – WIRING DESCRIPTION (P746xxxE)
  • Page 460 P746/EN IN/G31 Installation (IN) 15-22 MiCOM P746 10P74606-1 FIGURE 13: MiCOM P746 (80TE) – WIRING DESCRIPTION (P746xxxF)
  • Page 461 Installation P746/EN IN/G31 MiCOM P746 (IN) 15-23 P3948ENa FIGURE 14: MiCOM P746 (80TE) – WIRING DESCRIPTION (P746xxxG)
  • Page 462 P746/EN IN/G31 Installation (IN) 15-24 MiCOM P746 10P74608-1 FIGURE 15: MiCOM P746 (80TE) – WIRING DESCRIPTION (P746xxxH)
  • Page 463 Installation P746/EN IN/G31 MiCOM P746 (IN) 15-25 10P74609-1 FIGURE 16: MiCOM P746 (80TE) – WIRING DESCRIPTION (P746xxxJ)
  • Page 464 P746/EN IN/G31 Installation (IN) 15-26 MiCOM P746 10P74610-1 FIGURE 17: MiCOM P746 (80TE) – WIRING DESCRIPTION (P746xxxK)
  • Page 465 Installation P746/EN IN/G31 MiCOM P746 (IN) 15-27 10P74611-1 FIGURE 18: MiCOM P746 (80TE) – WIRING DESCRIPTION (P746xxxL)
  • Page 466 P746/EN IN/G31 Installation (IN) 15-28 MiCOM P746 COMMUNICATION OPTIONS FIGURE 19: MiCOM P746 (80TE) – COMMUNICATION OPTIONS...

  • Page 467: P746/En Hi/G31

    Remote HMI P746/EN HI/G31 MiCOM P746 REMOTE HMI Date: 2011 Hardware Suffix: Software Version: Connection Diagrams: 10P746xx (xx = 01 to 07)
  • Page 469 Remote HMI P746/EN HI/G31 MiCOM P746 (HI) 16-1 CONTENTS INTRODUCTION System requirements COMMUNICATION SETTINGS SERIAL settings ETHERNET settings Miscellaneous SCHEME EDITOR Principle of operation Constraints Designing the scheme 3.3.1 Creating a new blank scheme 3.3.2 Creating a Busbar 3.3.3 Creating a Busbar Link 3.3.4...
  • Page 470 P746/EN HI/G31 Remote HMI (HI) 16-2 MiCOM P746 BLANK PAGE...
  • Page 471 MiCOM P746 (HI) 16-3 INTRODUCTION The MiCOM P746 Remote HMI is an application that is used to define/create scheme and display the P746 measured data. The MiCOM P746 Remote HMI application operated in two modes: − Scheme Editor: This mode allows the user to define a scheme for P746 unit with the predefined Busbars, Tie Groups and Feeder Groups.
  • Page 472 (HI) 16-4 MiCOM P746 COMMUNICATION SETTINGS − MiCOM P746 Remote HMI Application supports communicating with P746 relay through SERIAL COM port and ETHERNET TUNNELING. − The settings for these communication can be selected before communicating with P746 in Scheme Editor or Dynamic Synoptic mode.
  • Page 473 Remote HMI P746/EN HI/G31 MiCOM P746 (HI) 16-5 SERIAL settings The following settings can be set for the schemes "FRONT SERIAL" and "REAR SERIAL" to communicate with P746 through SERIAL COM port. − COM port: The list of COM ports available in the system will be displayed. Select the port to which P746 is connected.
  • Page 474 P746/EN HI/G31 Remote HMI (HI) 16-6 MiCOM P746 − Transaction Values: Busy Hold-off Time, Busy Count, Reset Response Time, Response Time, Retry Count, Transmit Delay Time and Global Transmit Time.
  • Page 475 Remote HMI P746/EN HI/G31 MiCOM P746 (HI) 16-7 ETHERNET settings The following settings can be set for "ETHERNET" communication. − IP Address (Mandatory): Set the IP address though which P746 can be connected. − TCP Port number (Optional): Select this option if specific ETHERNET TCP port has to be used.
  • Page 476 P746/EN HI/G31 Remote HMI (HI) 16-8 MiCOM P746 − Transaction Values: Busy Hold-off Time, Busy Count, Reset Response Time, Response Time, Retry Count, Transmit Delay Time and Global Transmit Time. Miscellaneous Device Address Settings: − Set the Device Address of P746 this is to be connected.
  • Page 477 Remote HMI P746/EN HI/G31 MiCOM P746 (HI) 16-9 SCHEME EDITOR The Scheme Editor window is used to design the scheme for the P746 Relay using Busbar, Feeder Group and Tie Group graphical icons. The Main Window is composed of following parts: −...
  • Page 478 P746/EN HI/G31 Remote HMI (HI) 16-10 MiCOM P746 Principle of operation A library of predefined symbols allows the scheme to be created. This library is located in the form of toolbox located in the left side of the main window. These symbols can be easily dragged and dropped into the Scheme Window.
  • Page 479 Remote HMI P746/EN HI/G31 MiCOM P746 (HI) 16-11 Tie Groups Toolbox: S. No Tie Group Name Tie Group Icon Tie Group 1 Tie Group 2 Tie Group 3 Tie Group 4 Tie Group 5 Tie Group 6 Feeder Groups Toolbox: Feeder Group S.
  • Page 480 P746/EN HI/G31 Remote HMI (HI) 16-12 MiCOM P746 Feeder Group S. No Feeder Group Icon Name Feeder Group 4 Feeder Group 5 Feeder Group 6...
  • Page 481 Remote HMI P746/EN HI/G31 MiCOM P746 (HI) 16-13 Feeder Group S. No Feeder Group Icon Name Feeder Group 7 Feeder Group 8 Feeder Group 9 Feeder Group 10...
  • Page 482 P746/EN HI/G31 Remote HMI (HI) 16-14 MiCOM P746 Feeder Group S. No Feeder Group Icon Name Feeder Group 11 Feeder Group 12 Feeder Group 13 Feeder Group 14...
  • Page 483 Remote HMI P746/EN HI/G31 MiCOM P746 (HI) 16-15 Feeder Group S. No Feeder Group Icon Name Feeder Group 15 Feeder Group 16 Constraints − Number of maximum Busbars to be created in the scheme is restricted to 2. − Only one Tie group can be created in the scheme.
  • Page 484 P746/EN HI/G31 Remote HMI (HI) 16-16 MiCOM P746 Designing the scheme 3.3.1 Creating a new blank scheme − Select File-> New menu or New icon in the toolbar. "Select Scheme Mode" window appears as shown below: − If P746 relay is connected, select "Relay Connected" option and press "OK" button. The P746 mode will be retrieved from P746 and a new scheme will be created.
  • Page 485 Remote HMI P746/EN HI/G31 MiCOM P746 (HI) 16-17 3.3.2 Creating a Busbar The only difference between "Busbar Left" and "Busbar Right" is that the Busbar Labels on these symbols is displayed on left side and right side respectively. To create a Busbar, drag and drop "Busbar Left"...
  • Page 486 P746/EN HI/G31 Remote HMI (HI) 16-18 MiCOM P746 − If the selected Tie Group is having 2 CTs, "Tie Group Properties" window will be displayed as shown below: − Select CT for CT1 and CT2 and press "APPLY" button to create the Tie Group.
  • Page 487 Remote HMI P746/EN HI/G31 MiCOM P746 (HI) 16-19 3.3.6 Association of Zone for Isolators − The Zone information for isolators in Feeder Groups and Tie Groups will be associated dynamically when they are moved nearer to the Busbar. The following are the examples of association of Zone for Isolators in Feeder Groups: S.
  • Page 488 P746/EN HI/G31 Remote HMI (HI) 16-20 MiCOM P746 The following are the examples of association of Zone for Isolators in Tie Groups: S. No Description Before Association After Association Association of Tie Group with Busbar Links. Association of Tie Group without Busbar Links.
  • Page 489 Remote HMI P746/EN HI/G31 MiCOM P746 (HI) 16-21 3.3.7 Edit Options To Move an object: All objects in the scheme shall be moved anywhere in the scheme by following simple steps given below: − Select the objects to be moved.
  • Page 490 P746/EN HI/G31 Remote HMI (HI) 16-22 MiCOM P746 DYNAMIC SYNOPTIC This tool allows monitoring the electrical components present in the scheme and analogue values in real time. In Dynamic Synoptic mode, the main window consists of following parts: − The Menu Bar −...
  • Page 491 Remote HMI P746/EN HI/G31 MiCOM P746 (HI) 16-23 Animation of Scheme The Dynamic Synoptic polls states of CBs (Circuit Breaker), CTs (Current Transformer) with their Primary ratios and load currents, CB Bus Coupler and Isolators present in the scheme. The respective icons are animated based on the states polled from P746 and the load currents are displayed near each CT.
  • Page 492 P746/EN HI/G31 Remote HMI (HI) 16-24 MiCOM P746 Measurements Data Dynamic Synoptic polls P746 relay and displays P746 Mode Configuration, differential ad bias currents per phase, neutral values of each zone and CZ (Check Zone), voltages for connected zone, DDB Status information for Protection Status, Trip Status, Blocked Zone, Trip Zone and Alarm DDB Signals.
  • Page 493 Remote HMI P746/EN HI/G31 MiCOM P746 (HI) 16-25 Protection Status: − This indicates the blocked state of 87BB and 50BF signals. − The colors used are GREEN for "OK" and RED for "BLOCKED" state. Trip Status: − This indicates the trip state of 87BB and 50BF signals.
  • Page 494 P746/EN HI/G31 Remote HMI (HI) 16-26 MiCOM P746 MENUS The Main Menu Bar composed of following sub-menus: − File − Edit − View − Device − Mode − Language − Help File The FILE menu proposes the following actions: − New: Click File -> New menu or Click New icon in the Toolbar to create a new Scheme in the Scheme Editor mode.
  • Page 495 Remote HMI P746/EN HI/G31 MiCOM P746 (HI) 16-27 − Print: Select File->Print to display a dialog box as shown below, that allows to select the printer though which the scheme is to be printed.
  • Page 496 P746/EN HI/G31 Remote HMI (HI) 16-28 MiCOM P746 − Print Preview: Select File->Print Preview to preview the scheme in Print Preview dialog box as shown below: Edit The EDIT will be enabled in the Scheme Editor mode. All submenus under this menu will be disabled in Dynamic Synoptic mode.
  • Page 497 Remote HMI P746/EN HI/G31 MiCOM P746 (HI) 16-29 − Select All: Select Edit -> Select All menu or type “CTRL + A” to select all the symbols in the scheme. − Clear: Select Edit -> Clear menu or press Delete key to delete the selected symbol in the scheme.
  • Page 498 P746/EN HI/G31 Remote HMI (HI) 16-30 MiCOM P746 − Get Device Data: This menu will be enabled only when the data is being polled from P746. Select Device -> Get Device Data to display the device information in a dialog box as shown below: −...
  • Page 499 Remote HMI P746/EN HI/G31 MiCOM P746 (HI) 16-31 Language The Language menu proposes the following actions: − English: Select Language -> English menu to choose English language. − French: Select Language -> Français menu to choose French language. − Spanish: Select Language-> Español menu to choose Spanish language.
  • Page 500 P746/EN HI/G31 Remote HMI (HI) 16-32 MiCOM P746 BLANK PAGE...

  • Page 501: P746/En Cs/G31

    Cyber Sécurity P746/EN CS/G31 MiCOM P746 CYBER SECURITY Date: 2011 Hardware Suffix: Software Version: Connection Diagrams: 10P746xx (xx = 01 to 07)
  • Page 503 Cyber Security P746/EN CS/G31 MiCOM P746 (CS) 17-1 CONTENTS OVERVIEW THE NEED FOR CYBER SECURITY STANDARDS NERC Compliance 3.1.1 CIP 002 3.1.2 CIP 003 3.1.3 CIP 004 3.1.4 CIP 005 3.1.5 CIP 006 3.1.6 CIP 007 3.1.7 CIP 008 3.1.8...
  • Page 504 P746/EN CS/A11G31 Cyber Security (CS) 17-2 MiCOM P746 BLANK PAGE...
  • Page 505 Cyber Security P746/EN CS/G31 MiCOM P746 (CS) 17-3 OVERVIEW In the past, substation networks were traditionally isolated and the protocols and data formats used to transfer information between devices were more often than not proprietary. For these reasons, the substation environment was very secure against cyber attacks. The terms used for this inherent type of security are: −...
  • Page 506 P746/EN CS/A11G31 Cyber Security (CS) 17-4 MiCOM P746 THE NEED FOR CYBER SECURITY Cyber-security provides protection against unauthorized disclosure, transfer, modification, or destruction of information and/or information systems, whether accidental or intentional. To achieve this, there are several security requirements: −...
  • Page 507 Cyber Security P746/EN CS/G31 MiCOM P746 (CS) 17-5 STANDARDS There are several standards, which apply to substation cyber security (see Table 1). Country NERC CIP (North American Electric Framework for the protection of the Reliability Corporation) grid critical Cyber Assets...
  • Page 508 P746/EN CS/A11G31 Cyber Security (CS) 17-6 MiCOM P746 NERC Compliance The North American Electric Reliability Corporation (NERC) created a set of standards for the protection of critical infrastructure. These are known as the CIP standards (Critical Infrastructure Protection). These were introduced to ensure the protection of Critical Cyber Assets, which control or have an influence on the reliability of North America’s bulk electric...
  • Page 509 Cyber Security P746/EN CS/G31 MiCOM P746 (CS) 17-7 3.1.2 CIP 003 CIP 003 requires the implementation of a cyber security policy, with associated documentation, which demonstrates the management’s commitment and ability to secure its Critical Cyber Assets. The standard also requires change control practices whereby all entity or vendor-related...
  • Page 510 P746/EN CS/A11G31 Cyber Security (CS) 17-8 MiCOM P746 3.1.6 CIP 007 CIP 007 covers the following points: − Test procedures − Ports and services − Security patch management − Antivirus − Account management − Monitoring − An annual vulnerability assessment should be performed...
  • Page 511 Cyber Security P746/EN CS/G31 MiCOM P746 (CS) 17-9 IEEE 1686-2007 IEEE 1686-2007 is an IEEE Standard for substation IEDs cyber security capabilities. It proposes practical and achievable mechanisms to achieve secure operations. The following features described in this standard apply to Schneider Electric Px40 relays: −...
  • Page 512 P746/EN CS/A11G31 Cyber Security (CS) 17-10 MiCOM P746 PX40 CYBER SECURITY IMPLEMENTATION The Schneider Electric IEDs have always been and will continue to be equipped with state- of-the-art security measures. Due to the ever-evolving communication technology and new threats to security, this requirement is not static. Hardware and software security measures are continuously being developed and implemented to mitigate the associated threats and risks.
  • Page 513 Cyber Security P746/EN CS/G31 MiCOM P746 (CS) 17-11 Four-level Access The menu structure contains four levels of access three of which are password protected. These are summarized in Table 3. Level Meaning Read Operation Write Operation Read Some SYSTEM DATA column:...
  • Page 514 P746/EN CS/A11G31 Cyber Security (CS) 17-12 MiCOM P746 4.1.1 Default Passwords Default passwords are blank for Level 1, BBBB for level 2 and AAAA for Level 3. 4.1.2 Password Rules − Passwords may be any length between 0 and 8 characters long −...
  • Page 515 Cyber Security P746/EN CS/G31 MiCOM P746 (CS) 17-13 Password validation The IED checks for NERC compliance. If the password is entered through the front panel then this is reflected on the panel Liquid Crystal Display (LCD) display. If the entered password is NERC compliant, the following text is displayed...
  • Page 516 P746/EN CS/A11G31 Cyber Security (CS) 17-14 MiCOM P746 Password Management The user is locked out temporarily, after a defined number of failed password entry attempts. The number of password entry attempts, and the blocking periods are configurable. These settings are shown in Table 4.
  • Page 517 Cyber Security P746/EN CS/G31 MiCOM P746 (CS) 17-15 To prevent accidental reading of the IED security code the cell will initially display a warning message: PRESS ENTER TO READ SEC. CODE The security code will be displayed on confirmation, whereupon the validity timer will be started.
  • Page 518 P746/EN CS/A11G31 Cyber Security (CS) 17-16 MiCOM P746 4.5.2 Disabling Logical Ports It is possible to disable unused logical ports. A level 3 password is needed to perform this action. Note : The port disabling setting cells are not provided in the settings file...
  • Page 519 Cyber Security P746/EN CS/G31 MiCOM P746 (CS) 17-17 Events The implementation of NERC-compliant cyber security necessitates the generation of a range of Event records, which log security issues such as the entry of a non-NERC- compliant password, or the selection of a non-NERC-compliant default display. Table 6 lists all Security events.
  • Page 520 P746/EN CS/A11G31 Cyber Security (CS) 17-18 MiCOM P746 Event Value Display TRACE DAT D/LOAD TRACE DATA DOWNLOADED BY <int> IED CONFG D/LOAD IEC61850 CONFIG DOWNLOADED BY <int> USER CRV D/LOAD USER CURVES DOWNLOADED BY <int> GROUP <crv> PSL CONFG D/LOAD PSL CONFIG DOWNLOADED BY <int>...
  • Page 521 Cyber Security P746/EN CS/G31 MiCOM P746 (CS) 17-19 Where: int is the interface definition (UI, FP, RP1, RP2, TNL, TCP) prt is the port ID (FP, RP1, RP2, TNL, DNP3, IEC, ETHR) grp is the group number (1, 2, 3, 4)
  • Page 522 P746/EN CS/A11G31 Cyber Security (CS) 17-20 MiCOM P746 Cell Interface In Setting Parameter Default Setting Available Setting Applicability file? col row 0 = Disabled or Rear Port 2 25 07 Enabled 1 = Enabled 0 = Disabled or Ethernet Port*...

  • Page 523: P746/En Vh/G31

    Firmware and Service Manual P746/EN VH/G31 Version History MiCOM P746 FIRMWARE AND SERVICE MANUAL VERSION HISTORY Date: 2011 Hardware Suffix: Software Version: Connection Diagrams: 10P746xx...
  • Page 524 P746/EN VH/G31 Firmware and Service Manual Version History MiCOM P746...
  • Page 525 Relay type: P746 … Software Hardware Original Technical Version Description of Changes Suffix Date of Issue Compatibility Documentation Major Minor Original Issue Feb 2008 V2.14 P746/EN xx/A11 First release to production Nov 2008 Improvement of the CBF undercurrent detection reset V2.14 P746/EN xx/B11 Feb 2009...
  • Page 526 Relay Software Version...
  • Page 527 Relay Software Version *: P742 & P743...
  • Page 528 Relay Software Version...
  • Page 530 Schneider Electric 35 rue Joseph Monier 92506 Rueil-Malmaison FRANCE Phone: +33 (0) 1 41 29 70 00 Fax: +33 (0) 1 41 29 71 00 www.schneider-electric.com Publishing: Schneider Electric Publication: P746/EN M/G31 01/2011...

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