Related Manuals for GE P742
Summarization of Contents
MiCOM P40 Agile Technical Manual
Technical Manual
Provides a functional and technical description of the MiCOM protection relay and instructions for its use and application.
Busbar Differential Protection Relay
Details the protection functions and application of the P74x series busbar protection relays.
Documentation Structure
P74x/EN IT Introduction
A guide to the MiCOM range of relays and the documentation structure, including general safety aspects.
P74x/EN TD Technical Data
Provides technical data including setting ranges, accuracy limits, operating conditions, ratings, and performance data.
P74x/EN GS Getting Started
A guide to the different user interfaces of the protection relay and how to start using it.
P74x/EN ST Settings
Lists all relay settings, including ranges, step sizes, and defaults, with a brief explanation of each.
P74x/EN OP Operation
A comprehensive and detailed functional description of all protection and non-protection functions.
P74x/EN AP Application Notes
Describes common power system applications, settings calculation, worked examples, and how to apply settings.
P74x/EN PL Programmable Logic
Overview of the programmable scheme logic and description of each logical node, including factory default.
P74x/EN MR Measurements and Recording
Detailed description of the relay's recording and measurement functions, including event and disturbance recorder configuration.
P74x/EN FD Firmware Design
Overview of the operation of the relay’s hardware and software, including self-checking features and diagnostics.
P74x/EN CM Commissioning
Instructions on how to commission the relay, comprising checks on calibration and functionality.
P74x/EN MT Maintenance
Outlines a general maintenance policy for the relay.
P74x/EN TS Troubleshooting
Provides advice on recognizing failure modes and recommended courses of action, including contact information for advice.
P74x/EN SC SCADA Communications
Overview of SCADA communication interfaces, detailed protocol mappings, semantics, profiles, and interoperability tables.
P74x/EN SG Symbols and Glossary
Lists common technical abbreviations found within the product documentation.
P74x/EN IN Installation
Recommendations on unpacking, handling, inspection, storage, and installation of the relay.
P74x/EN VH Firmware and Service Manual Version History
History of all hardware and software releases for the product.
Introduction to MiCOM
MiCOM Concept and Components
Explains the MiCOM concept of flexibility and lists its components like protection relays, control products, and measurement products.
Product Scope
P74x Differential Busbar Protection Relays
Describes the design for protection of substation busbars, including non-protection features for fault analysis.
Functional Overview
Details the wide variety of protection functions available in the P74x Busbar protection, summarized in an overview table.
Technical Data
Mechanical Specification
Details the design, enclosure protection, and weight of the P74x relays.
Terminals
Describes AC current and voltage measuring inputs, general input/output terminals, and case protective earth connection.
Front Port Serial PC Interface
Information on the EIA RS232 serial port for PC communication and its supported Courier protocol.
Rear Communications Port
Details the K-Bus/EIA (RS)485 signal levels, connections, and protocol.
Optical Fiber Connection
Information on the BFOC 2.5 (ST®) interface for multi-mode glass fibre.
Optional Rear Ethernet Connection for IEC 61850
Specifications for the optional rear Ethernet connection supporting IEEE802.3 and IEC61850.
Ratings
Covers AC Measuring Inputs, AC Current, Power Supply, Operating Range, Nominal Burden, and Power-up Time.
Type Tests
Details insulation, creepage, dielectric withstand, impulse voltage, EMC, electrical fast transient, and immunity tests.
EU Directives
Information on EMC and Product Safety compliance with relevant EU directives and standards.
Mechanical Robustness
Covers Vibration, Shock and Bump, and Seismic Tests as per IEC standards.
Timings and Accuracy
Specifies operating times and accuracy for various functions, including overcurrent and differential elements.
Disturbance records
Details accuracy for waveshape, magnitude, relative phases, duration, and trigger position.
Performance Data
Specifies accuracy for Busbar Protection, Circuitry fault, Dead Zone, Overcurrent, Earth Fault, and Transient overreach.
Getting Started
1. GETTING STARTED
General guidance before working on the equipment, including familiarization with safety, technical data, and ratings.
1.1 User interfaces and menu structure
Describes access to settings and functions via front panel and communication ports.
1.2 Introduction to the relay
Introduces the relay, covering the front panel and rear panel details.
1.3 Relay connection and power-up
Instructions for connecting the relay and ensuring correct power supply voltage and signal magnitudes.
1.4 Introduction to the user interfaces and settings options
Outlines the three user interfaces: front panel, front port, and rear port.
1.5 Menu structure
Explains the tabular arrangement of settings, accessible via row and column addresses.
1.6 Password protection
Details the three levels of access controlled by passwords, summarized in a table.
1.7 Relay configuration
Describes the multi-function device supporting various protection, control, and communication features.
1.8 Front panel user interface (keypad and LCD)
Explains the functions of the keypad, LCD, LEDs, and hotkeys for navigation and control.
1.9 Front communication port user interface
Details the EIA(RS)232 serial port for PC communication and its supported Courier protocol.
1.10 S1 Agile relay communications basics
Covers the use of S1 Agile software for settings program, connecting to the relay, and off-line use.
2. CONFIGURING THE ETHERNET INTERFACE
Guides on configuring the Ethernet interface for IEC 61850, including IP address and configuration extraction.
3. CONFIGURING THE REDUNDANT ETHERNET BOARD
Explains how to configure IP addresses for the IED (IP1) and REB (IP2) using Switch Manager or RSTP Configurator.
4. CONFIGURING THE DATA PROTOCOLS
Details configuration for Courier and IEC 61850 protocols, including port settings and communication modes.
5. PRP/HSR CONFIGURATOR
Outlines the use of the PRP/HSR Configurator tool for IEDs with redundant Ethernet, including device identification, mode selection, IP configuration, and parameters.
Settings
1. SETTINGS
Explains the need for configuring the P74x relay with application-specific settings and the sequence of description.
1.1 Relay settings configuration
Details the multi-function device, configuration settings column for enabling/disabling functions, and copying settings between groups.
1.1.1 “System data” column
Provides information for the device and general status, including language, password, description, plant reference, model number, serial number, frequency, and comms level.
1.1.2 “Configuration” column (P741 Central Unit)
Lists default settings and available settings for various functions like setting group, active settings, save changes, copy from/to, and protection settings visibility.
1.1.3 “Configuration” column (P742 / P743 Peripheral Units)
Lists default settings and available settings for functions like restore defaults, setting group, active settings, save changes, and copy from.
1.1.4 “PU Conf & Status” column (P741 Central Unit)
Details additional configuration for the central unit to configure hardware according to software topology, including PU status and errors.
1.1.5 Default settings restore
Explains how to restore default settings to protection settings groups or all settings.
1.1.6 “Date and time” column
Covers display of date, time, battery status, IRIG-B sync, SNTP status, local time adjustments, DST, and related settings.
1.2 Protection settings
Lists protection settings including differential phase and earth fault protection, busbar option, busbar trip, dead zone, overcurrent, earth fault, CB fail, and CT supervision.
1.3 Control and support settings
Covers circuit breaker control, CT & VT ratios, record control, measurements, communications, commissioning tests, opto configuration, control input settings, InterMiCOM, and function keys.
1.4 Disturbance recorder settings
Details disturbance recorder settings including duration, trigger position, trigger mode, analog channels, and digital inputs.
Operation
1. OPERATION OF INDIVIDUAL PROTECTION FUNCTIONS
Details individual protection functions like Busbar Biased Current Differential Protection, Busbar Protection, Additional protections, Three Phase Overcurrent Protection, and Earth Fault Protection.
2. CURRENT TRANSFORMERS
Focuses on Current Transformer Saturation detection.
3. ISOLATOR AND CIRCUIT BREAKER FUNCTION
Explains isolator state monitoring and circuit breaker state monitoring features.
4. OPERATION OF NON PROTECTION FUNCTIONS
Covers programmable scheme logic, level settings, accuracy, IRIG-B signal, and differential current display.
5. COMMUNICATIONS BETWEEN PU AND CU
Details communications link, direct optical fibre link, and optical budgets.
Application Notes
1. INTRODUCTION
Emphasizes the importance of familiarizing with safety, technical data, and ratings before working on the equipment.
1.1 Protection of Substation Busbars
Discusses the critical role of busbars in power systems and the need for reliable, fast, and discriminative protection.
2. APPLICATION OF INDIVIDUAL PROTECTION FUNCTIONS
Details individual protection functions and provides worked examples of setting applications.
2.1 Busbar Protection
Explains Busbar Biased Current Differential Protection and provides setting guidelines.
2.2 Additional protections
Covers Dead Zone protection, Over Current protection, Earth Fault protection, Stub protection, Circuit Breaker Fail, and External Fault Detection.
10. CT REQUIREMENTS
Specifies notation and requirements for 87BB Phase CTs, including feeders connected to significant power sources and out-of-service feeders.
10.3 87BB Sensitive Differential Earth Fault CT Requirements
Details the requirements for SDEF CTs, particularly for High Impedance Earthed Networks.
10.4 Support of IEEE C Class CTs
Explains the compatibility of Px40 series protection with ANSI/IEEE current transformers and provides a table for translating ratings.
11. AUXILIARY SUPPLY FUSE RATING
Recommends advisory limits for relays connected per fused spur and discusses fuse rating selection.
Programmable Logic
1. PROGRAMMABLE LOGIC
Explains the purpose of PSL, allowing users to configure individual protection schemes using logic gates and timers.
1.2 S1 Px40 PSL editor
Describes how to access the Px40 PSL Editor Menu for retrieving, editing, and sending PSL files.
1.3 How to use Px40 PSL editor
Lists the functionalities of the Px40 PSL Module for creating, extracting, editing, and printing PSL files.
1.4 Warnings
Details potential problems and warning messages that may be displayed during scheme checks, such as model mismatch, gate/link limits, and erroneous links.
1.5 Toolbar and commands
Describes various toolbars and commands for easy navigation and editing of PSL schemes, including standard, alignment, drawing, nudge, rotation, structure, zoom, and logic symbols.
1.6 PSL logic signals properties
Explains the properties of logic signals, including link properties, opto signal properties, input/output signal properties, GOOSE signals, control in signals, InterMiCOM commands, function keys, fault recorder triggers, LED signals, contact signals, conditioners, timers, gates, and SR latch gates.
1.7 Description of P741 logic nodes
Provides a description of P741 logic nodes, sorted by DDB number and DDB name, detailing their type, source, and function.
1.8 Description of P742 logic nodes
Provides a description of P742 logic nodes, sorted by DDB number and DDB name, detailing their type, source, and function.
1.9 Description of P743 logic nodes
Provides a description of P743 logic nodes, sorted by DDB number and DDB name, detailing their type, source, and function.
1.10 Factory default programmable scheme logic
Details the default settings of the PSL for P74x models, including logic inputs and relay outputs.
1.11 Logic input mapping
Shows the default mappings for opto-isolated inputs for Central Unit P741 and Peripheral Units P742/P743.
1.12 Relay output contact mapping
Details the default mappings for relay output contacts in Central Unit P741 and Peripheral Units P742/P743.
1.13 Function key input mapping
Provides default mappings for function key inputs for Central Unit P741.
1.14 Programmable LED output mapping
Shows the default mappings for programmable LEDs in Central Unit P741 and Peripheral Units P742/P743.
1.15 Fault recorder start mapping
Details the default mapping for the signal that initiates a fault record.
1.16 PSL DATA column
Explains the PSL DATA column used for tracking PSL modifications, including group PSL reference, date/time, and PSL ID.
Measurements and Recording
1. INTRODUCTION
States that P74x is equipped with integral measurements, event, fault, and disturbance recording facilities for analyzing complex system disturbances.
2. EVENT & FAULT RECORDS
Explains how the relay records and time tags up to 512 events in non-volatile memory for sequence analysis.
3. DISTURBANCE RECORDER
Details the integral disturbance recorder with memory for records, sampling rates, and menu columns for configuration.
4. MEASUREMENTS
Covers Check Zone Phase Currents, Measured currents, Sequence voltages and currents, Settings, and Measurement display quantities.
5. MONITORING TOOLS
Describes the S1 software and Dynamic Synoptic tool for substation busbar display and monitoring.
Firmware Design
1. RELAY SYSTEM OVERVIEW
Provides an overview of the relay hardware, including processor board, coprocessor board, communication boards, input modules, power supply, and optional boards.
2. HARDWARE MODULES
Describes the functional operation of the relay's hardware modules, including processor board, coprocessor board, communication board, input modules, power supply, and relay output boards.
3. RELAY SOFTWARE
Details the relay software components: real-time operating system, system services software, communication software, platform software, and protection & control software.
4. SELF TESTING & DIAGNOSTICS
Explains the relay's self-monitoring functions for checking hardware and software operations, including start-up and continuous self-testing.
Commissioning
1. INTRODUCTION
Explains that P74x Busbar Differential Protection is fully numerical and requires verification of hardware and application-specific settings.
2. SETTING FAMILIARISATION
Guides users on applying settings via PC software or the operator interface, emphasizing familiarity with the process.
3. EQUIPMENT REQUIRED FOR COMMISSIONING
Lists minimum and optional equipment needed for commissioning, including test sets, multimeters, insulation testers, and PCs with software.
4. PRODUCT CHECKS
Covers checks to ensure the relay is not physically damaged, functions correctly, and has accurate input measurements. Includes checks with the relay de-energised and energised.
5. COMMISSIONING TEST MENU
Details test modes for PU and CU, busbar monitoring, and disabling busbar/CBF functions.
6. SETTING CHECKS
Ensures application-specific settings and PSL are correctly applied, covering methods for applying settings and checking their correctness.
6.3 Demonstrate Correct Relay Operation
Outlines tests to determine primary protection function trip, backup overcurrent setting verification, and input/relay/contact response.
6.3.1 Current Differential Bias Characteristic
Explains how to test the current differential bias characteristic by injecting currents and monitoring operation.
6.3.2 Phase Overcurrent Protection (P742 and P743)
Details testing of I>1 and I>2 elements, disabling other elements, connecting test circuits, and checking operating times.
6.3.3 Breaker Failure Protection
Explains testing of separate external 50BF protection and external initiation of BF protection.
6.4 Check Application Settings
Covers methods for checking applied settings against required application-specific settings and verifying programmable scheme logic.
7. END TO END TESTS
Verifies communications between Peripheral Units and Central Unit, including optical power checks.
8. ON-LOAD CHECKS
Confirms external wiring, ensures on-load differential current is below settings, and checks CT wiring and polarities.
9. FINAL CHECKS
Outlines final checks after tests are complete, including removing test leads, restoring settings, and resetting records/alarms/LEDs.
10. COMMISSIONING TEST RECORD
Provides a template for recording peripheral unit commissioning test data, including front plate information and test equipment used.
11. SETTING RECORD
Details how to record settings for the Central Unit (P741) and Peripheral Units (P742/P743), including relay settings, disturbance recorder, control/support, and protection settings.
Troubleshooting
1. INTRODUCTION
Explains the purpose of the troubleshooting section to identify error conditions and take corrective action.
2. INITIAL PROBLEM IDENTIFICATION
Guides users to consult a table matching symptoms to sections for detailed analysis.
3. POWER UP ERRORS
Provides a procedure to identify the cause of power-up issues, checking external wiring, fuses, power supply module, or front panel.
4. ERROR MESSAGE/CODE ON POWER-UP
Explains how error messages are displayed during power-up self-tests and lists common error codes related to relay modules.
5. OUT OF SERVICE LED ILLUMINATED ON POWER UP
Guides on checking the Commission Test/Test Mode setting and interpreting the Out of Service LED and maintenance records for hardware verify fail.
6. ERROR CODE DURING OPERATION
Details how errors are detected and reported during operation, including maintenance records, relay reboots, and error code meanings.
7. MAL-OPERATION OF THE RELAY DURING TESTING
Addresses potential mal-operations during testing, such as output contact failure, opto-isolated input failure, incorrect analog signals, and PSL editor issues.
8. REPAIR AND MODIFICATION PROCEDURE
Provides a 5-step procedure for returning an Automation product for repair, including obtaining RMA, filling the form, and shipping.
SCADA Communications
1. SCADA COMMUNICATIONS
Outlines the relay's remote communication interfaces, including rear port protocols like EIA(RS)485, Courier, and Ethernet (IEC 61850).
2. COURIER INTERFACE
Details the Courier protocol, supported command set, relay database, and setting changes, including transfer modes and event/disturbance record extraction.
3. IEC 61850 ETHERNET INTERFACE
Explains IEC 61850 as an international standard for Ethernet-based communication in substations, covering its capabilities, data model, and services.
Symbols and Glossary
Logic Symbols used
Defines common logic symbols used in PSL diagrams, including gates, timers, and SR latch gates.
Symbols
Provides an alphabetical list of symbols used in the document with their explanations.
Installation
1. RECEIPT OF RELAYS
Instructions for inspecting relays upon receipt to ensure no transit damage and proper storage.
2. HANDLING OF ELECTRONIC EQUIPMENT
Precautions for handling electronic circuits to prevent electrostatic discharge damage, including handling modules and using anti-static measures.
3. STORAGE
Guidelines for storing relays free from dust and moisture in their original cartons, with temperature considerations.
4. UNPACKING
Care instructions for unpacking relays to prevent damage and ensure all components are accounted for.
5. RELAY MOUNTING
Details methods for mounting relays, including rack mounting and panel mounting, with information on fixing screws and blanking plates.
6. RELAY WIRING
Covers terminal block connections, RS485 port, IRIG-B, RS232 port, optical fiber connectors, download/monitor port, and earth connection.
7. P741 - CENTRAL UNIT
Provides hardware description and rear view of the P741 Central Unit.
8. P742 – PERIPHERAL UNIT
Provides hardware description and rear view of the P742 Peripheral Unit.
9. P743 – PERIPHERAL UNIT
Provides hardware description and rear view of the P743 Peripheral Unit.
10. EXTERNAL CONNECTION DIAGRAMS
Refers to Appendix A for a full list of wiring and communication diagrams.
Firmware and Service Manual Version History
Relay type: P740 … Software Version
Details software version history, hardware suffix, original date of issue, description of changes, S1 compatibility, and technical documentation for different relay types.
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