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GE MiCOM P143 Agile User Manual

GE MiCOM P143 Agile
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7 APPLICATION NOTES
Electrical InterMiCOM settings are contained within two columns; INTERMICOM C
OMMS and INTERMICOM CONF.
The INTERMICOM COMMS column contains all the settings needed to configure the communications, as well as the
channel statistics and diagnostic facilities. The INTERMICOM CONF column sets the mode of each command signal
and defines how they operate in case of signalling failure.
Short metallic direct connections and connections using fire-optic converters will generally be set to have the
highest signalling speed of 19200b/s. Due to this high signalling rate, the difference in operating time between the
direct, permissive, and blocking type signals is small. This means you can select the most secure signalling
command type (‘Direct’ intertrip) for all commands. You do this with the IM# Cmd Type settings. For these
applications you should set the IM# Fallback Mode to Default. You should also set a minimal intentional delay
by setting IM# FrameSyncTim to 10 msecs. This ensures that whenever two consecutive corrupt messages are
received, the command will immediately revert to the default value until a new valid message is received.
For applications that use Modem and/or multiplexed connections, the trade-off between speed, security, and
dependability is more critical. Choosing the fastest baud rate (data rate) to achieve maximum speed may appear
attractive, but this is likely to increase the cost of the telecommunications equipment. Also, telecommunication
services operating at high data rates are more prone to interference and suffer from longer re-synchronisation
times following periods of disruption. Taking into account these factors we recommend a maximum baud rate
setting of 9600 bps. As baud rates decrease, communications become more robust with fewer interruptions, but
overall signalling times increase.
At slower baud rates, the choice of signalling mode becomes significant. You should also consider what happens
during periods of noise when message structure and content can be lost.
In ‘Blocking’ mode, the likelihood of receiving a command in a noisy environment is high. In this case, we
recommend you set IM# Fallback Mode to Default, with a reasonably long IM# FrameSyncTim setting.
Set IM# DefaultValue to ‘1’. This provides a substitute for a received blocking signal, applying a failsafe for
blocking schemes.
In ‘Direct’ mode, the likelihood of receiving commands in a noisy environment is small. In this case, we
recommend you set IM# Fallback Mode to Default with a short IM# FrameSyncTim setting. Set IM#
DefaultValue to ‘0’. This means that if a corrupt message is received, InterMiCOM will use the default value.
This provides a substitute for the intertrip signal not being received, applying a failsafe for direct
intertripping schemes.
In ‘Permissive’ mode, the likelihood of receiving a valid command under noisy communications conditions is
somwhere between that of the ‘Blocking’ mode and the ‘Direct’ intertrip mode. In this case, we
recommended you set IM# Fallback Mode to Latched.
The table below presents recommended IM# FrameSyncTim settings for the different signalling modes and baud
rates:
Minimum Recommended "IM# FrameSyncTim" Setting
Baud Rate Direct Intertrip Mode Blocking Mode
Minimum Setting
(ms)
Maximum Setting
(ms)
600 100 250 100 1500
1200 50 130 50 1500
2400 30 70 30 1500
4800 20 40 20 1500
9600 10 20 10 1500
19200 10 10 10 1500
Chapter 17 - Electrical Teleprotection P14x
378 P14xEd1-TM-EN-1

Table of Contents

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GE MiCOM P143 Agile Specifications

General IconGeneral
BrandGE
ModelMiCOM P143 Agile
CategoryControl Unit
LanguageEnglish

Summary

Chapter 1 Introduction

Features and Functions

Details the protection, control, measurement, and communication functions offered by the P14x range.

Chapter 2 Safety Information

Chapter Overview

Provides information on safe handling of the equipment and the importance of familiarizing with the chapter's content.

Health and Safety

Outlines the necessary qualifications and practices for personnel working with the equipment.

Symbols

Explains various symbols used in the manual and on the equipment, including Caution and Warning notices.

Installation, Commissioning and Servicing

Details lifting hazards, electrical hazards, UL/CSA/CUL requirements, fusing, equipment connections, and servicing precautions.

Chapter 3 Hardware Design

Chapter 4 Software Design

Protection and Control Functions

Describes the software processing of protection elements and measurement functions.

Chapter 5 Configuration

Settings Application Software

Explains the use of MiCOM S1 Agile for configuring the device and managing IEDs.

Using the HMI Panel

Details how to navigate menus, display status, display measurements, and reset alarms using the HMI.

Chapter 6 Current Protection Functions

Overcurrent Protection Principles

Explains the job of IEDs in protecting power systems from faults and principles of coordination.

Phase Overcurrent Protection

Details the implementation and logic of phase overcurrent protection.

Cold Load Pickup

Explains the functionality to prevent undesired tripping during energisation due to high cold load currents.

Sensitive Earth Fault Protection

Describes protection for limited fault current scenarios using SEF input.

Thermal Overload Protection

Explains thermal time characteristics based on I2Rt for protecting against over-temperature conditions.

Chapter 7 Restricted Earth Fault Protection

REF Protection Principles

Explains principles of winding-to-core faults and protection arrangements for delta and star sides of transformers.

Chapter 8 CB Fail Protection

Circuit Breaker Fail Protection

Explains the purpose and practice of installing Circuit Breaker Failure protection.

Circuit Breaker Fail Implementation

Details the implementation of CBF timers and resetting mechanisms.

Chapter 9 Current Transformer Requirements

CT requirements

Details CT requirements for phase overcurrent, earth fault, and SEF protection.

Chapter 10 Voltage Protection Functions

Undervoltage Protection

Explains the causes and implementation of undervoltage protection.

Overvoltage Protection

Details the implementation and logic of overvoltage protection.

Chapter 11 Frequency Protection Functions

Underfrequency Protection

Explains the implementation and logic of underfrequency protection.

Overfrequency Protection

Details the implementation and logic of overfrequency protection.

Load Shedding and Restoration

Details the implementation and logic for load restoration.

Chapter 12 Power Protection Functions

Overpower Protection

Details forward and reverse overpower conditions and their implementation.

Underpower Protection

Explains underpower protection implementation and logic.

Chapter 13 Autoreclose

Implementation

Details how autoreclose functionality is selected and implemented.

Autoreclose Function Inputs

Describes logic inputs for the autoreclose function like CB Healthy, Block AR, and Auto Mode.

Setting Guidelines

Provides guidance on setting parameters like number of shots, dead time, and reclaim time.

Chapter 14 Monitoring and Control

Event Records

Explains how the IED records events in an event log for system analysis.

Circuit Breaker Control

Details the control of circuit breakers using IED menu, hotkeys, function keys, opto-inputs, and SCADA.

System Checks

Describes functionality for monitoring voltages, synchronisation, and system split.

Chapter 15 Supervision

Voltage Transformer Supervision

Explains the VTS function for detecting AC voltage input failures.

Trip Circuit Supervision

Describes schemes for supervising the trip coil and trip path.

Chapter 16 Digital I/O and PSL Configuration

Chapter 17 Electrical Teleprotection

Teleprotection Scheme Principles

Describes three types of teleprotection commands: Direct Tripping, Permissive Tripping, and Blocking Scheme.

Chapter 18 Communications

Serial Communication

Details physical layer standards for serial communications: EIA/RS485, K-Bus, and EIA/RS232.

Chapter 19 Cyber-Security

Cyber-Security Implementation

Describes the current implementation of cyber-security measures at IED and external levels.

Chapter 20 Installation

Handling the Goods

Discusses requirements for receiving, unpacking, and storing the goods.

Chapter 21 Commissioning Instructions

General Guidelines

Offers general guidelines for commissioning, emphasizing verification of hardware and settings.

Product Checks

Describes checks for physical damage, correct configuration, and measurement accuracy.

Setting Checks

Ensures application-specific settings are correctly applied, using transfer or manual methods.

Chapter 22 Maintenance and Troubleshooting

Maintenance

Covers maintenance checks, alarms, opto-isolators, output relays, and measurement accuracy.

Troubleshooting

Guides on identifying error messages, power-up errors, and issues during operation.

Chapter 23 Technical Specifications

Performance of Current Protection Functions

Provides accuracy specifications for various current protection functions.

Electromagnetic Compatibility

Details tests for 1 MHz burst, damped oscillatory, ESD, EFT, surge, radiated, and conducted disturbances.

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