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Overview of the relay's purpose and capabilities.
Describes the relay's core features and functionalities.
Details the timed and instantaneous phase and earth fault protection features.
Covers metering, recording fault data, and analysis capabilities.
Describes the LCD display, LEDs, and navigation keys on the device.
Details the USB and RS485 ports and supported protocols.
Lists the protection functions supported by the P153 relay.
Provides details on available variants and how to order the P153 relay.
Emphasizes the need for qualified personnel and adherence to safety practices.
Explains cautionary and warning symbols used in the manual and on equipment.
Covers hazards related to lifting, electrical work, and general installation safety.
Specifies requirements for protecting digital input and CT circuits.
Provides safety guidelines for connecting terminals and wiring.
Details requirements for earthing Class 1 equipment.
Lists essential checks before energizing the equipment.
Discusses safety precautions for CT secondary circuits and external components.
Safety warnings for module insertion/removal and internal handling.
Safety instructions for isolating power and proper disposal procedures.
Information on EMC and LVD compliance directives.
Outlines the main components of the P153 hardware.
Explains the hardware design with internal CTs, SMPS, and signal processing.
Describes the 32-bit controller and its features.
Lists the specifications of the microcontroller module.
Details the analog input processing and CT signal scaling.
Describes the DI and DO channels and their isolation.
Explains the PWM switching mode power supply unit.
Covers the USB and RS485 ports for communication.
Describes the LCD, touch keys, and LEDs on the front panel.
Details the components and layout of the device's front panel.
Explains how to interact with the device using the front panel.
Describes the 16x2 character backlit LCD display.
Details the function of navigation and control keys.
Explains the purpose of the six high-intensity LEDs.
Describes the rear RS485 port for SCADA connectivity.
Details the front USB port for PC communication.
Outlines the common methodology for setting device parameters.
Step-by-step guide to modifying device settings.
Explains how to access and change the device password.
Overview of the device's menu structure.
Describes the initial display after power-on or reset.
Lists the primary menu options available on the device.
Accesses settings like language, serial number, and frequency.
Provides access to fault, event, maintenance, and alarm records.
Displays measured electrical quantities like currents and thermal state.
Settings related to circuit breaker control and supervision.
Settings for configuring date, time, and daylight saving.
Settings for restoring defaults, copying groups, and enabling system features.
Configuration of CT primary and secondary ratios.
Settings for clearing stored records and resetting thermal data.
Configuration of communication parameters like address and baud rate.
Configuration of relays, LEDs, AND logic, and opto inputs.
Settings for output relay timing and reset mechanisms.
Setting the trigger position for disturbance recording.
Accesses test modes, patterns, and LED checks.
Settings specific to Group 1 configuration.
Settings specific to Group 2 configuration.
Illustrates the navigation flow through the configuration menus.
Details the various protection functions offered by the P153 relay.
Explains the fundamental principles of overcurrent protection.
Describes Inverse Definite Minimum Time (IDMT) curves.
Explains how protection functions are implemented using IEDs.
Details the timer hold and reset facilities for protection stages.
Covers faults between phases and types of phase faults.
Explains the implementation of phase overcurrent protection stages.
Discusses using negative sequence elements for fault detection.
Details the implementation of negative sequence overcurrent protection.
Explains the logic for negative sequence overcurrent protection.
Covers earth faults and methods for measuring them.
Describes the elements used for earth fault protection.
Explains the logic for earth fault protection.
Details the thermal overload protection mechanism.
Explains the implementation of thermal overload protection.
Describes detection of faults due to broken conductors.
Details the implementation of broken conductor protection.
Explains the logic for broken conductor detection.
Functionality for detecting undercurrent or loss of power.
Protection against circuit breaker failure to operate.
Details the implementation of circuit breaker fail protection.
Explains the logic for circuit breaker fail detection.
Manages high currents during load energization to prevent nuisance tripping.
Explains the logic for cold load pickup functionality.
Handles faults occurring immediately after breaker closure.
Blocks tripping during transformer inrush using second harmonic analysis.
Details the implementation of second harmonic blocking.
Details the configurable parameters for protection functions.
Configuration settings for system-level parameters.
Parameters for controlling and supervising circuit breakers.
Configuration for date, time, and daylight saving.
Manages overall device configuration and feature enabling.
Settings for transformer current transformer ratios.
Options for managing event, fault, and disturbance records.
Configuration of communication interface parameters.
Configuration of digital inputs, outputs, and logic.
Settings for output relay timing and reset mechanisms.
Configuration for disturbance recording parameters.
Settings for performing device commissioning tests.
Manages protection settings across different groups.
Functions for monitoring device status and events.
Details on logging and retrieving event, fault, and disturbance data.
Describes the generation and storage of event records.
Information on how alarms are logged and acknowledged.
Details on triggering and analyzing fault records.
Describes logs for internal failures and maintenance events.
Covers recording and extracting disturbance waveforms.
Settings for clearing stored records and resetting thermal state.
How to view measured electrical quantities on the LCD.
Configuration and assignment of digital opto-inputs.
Details on relay outputs and their functions.
Assigning functions to output relays RL1-RL4.
Setting self-reset or latching behavior for relay contacts.
Timer for holding relay contacts after trip.
Configuration of bi-colour LEDs for status indication.
Using AND logic equations for Boolean functions.
Monitoring circuit breaker operation statistics.
Detects slow CB operation and raises an alarm.
Generates an alarm based on CB operation count.
Options for controlling the circuit breaker locally or remotely.
Performing CB operations via the IED menu.
Enabling remote CB control via SCADA or other systems.
Monitors the trip coil circuit for integrity.
Guidance on calculating resistor values for TCS scheme.
How the relay detects and reports internal hardware/software faults.
Monitors hardware health and detects faults.
Details how SCADA communication standards are applied.
Describes the application of the Modbus standard on the Px50 platform.
Provides an overview of Modbus, including connection and modes.
Lists supported Modbus function codes and protocol mapping.
Maps Modbus function codes to register addresses.
Describes the application of the IEC 60870-5-103 standard.
Overview of the IEC 60870-5-103 standard's application.
Details connection options for IEC 60870-5-103.
Procedures for initializing communication.
Setting time and date using the synchronization feature.
Categorization of events using function type and information number.
Requesting device status and information during GI cycle.
How measured values are transmitted cyclically.
Lists supported commands for the P153 relay.
Enabling test mode via front panel menu.
Storing and extracting disturbance records.
Steps for configuring the IED for the protocol.
Maps information numbers to functions and commands.
Covers procedures for handling, mounting, and connecting the device.
Requirements for receiving, unpacking, and storing the device.
Instructions for checking product upon delivery.
Guidance on careful unpacking and handling components.
Proper storage conditions to maintain product integrity.
Basic precautions for dismantling the device.
Details on flush panel mounting procedures.
Step-by-step guide for mounting the relay in a panel.
Safety and wiring guidelines for relay connections.
Specifies operating within electrical and environmental limits.
Safety warnings for CT secondary circuit connections.
Procedures for insulation testing and capacitor discharge.
Guidelines on wiring types and connections.
Details on various terminal blocks for connections.
Instructions for terminating CT wires with ring lugs.
Wiring specifications for digital input/output terminals.
Details on connecting the rear serial port for SCADA.
Guidelines for wiring auxiliary supply inputs.
Instructions for connecting the relay to the earthing bar.
Wiring specifications for current transformer connections.
Cable specifications for EIA (RS485) connections.
Wiring instructions for output relay connections.
Details on connecting a PC to the IED via USB.
Provides the physical dimensions and panel cutout details.
Outlines the procedures for testing and commissioning the relay.
Describes the test facilities available in the IED.
How to enable test mode for secondary injection and output testing.
Selecting output relay contacts for testing.
Procedure for testing relay contact state changes.
Testing the functionality of the programmable LEDs.
Monitoring the status of opto-inputs.
Monitoring the status of relay outputs.
Lists the minimum test equipment needed for commissioning.
Steps for checking and replacing the internal battery.
Verifying external wiring, CTs, and auxiliary supply.
Ensuring proper connection to the earthing terminal.
Verifying correct CT connection and polarity.
Verifying application-specific settings are correctly applied.
Verifying the timing accuracy of protection functions.
Testing the operating time of the overcurrent protection stage.
Steps for connecting the test circuit for overcurrent checks.
Procedure for executing the overcurrent protection test.
Verifying the operating time against specified ranges.
Performing checks while the plant is energized.
Measuring secondary current values and comparing them.
Final steps to restore the device to service after testing.
Procedures for routine maintenance and checks.
Regular checks to ensure correct operation and wiring integrity.
Checking opto-input functionality using commissioning tests.
Checking output relay functionality using commissioning tests.
Verifying measured values against known system or injected values.
Instructions for replacing the internal battery.
Step-by-step guide for replacing the coin battery.
Procedure for replacing a faulty unit and re-commissioning.
Guidelines for cleaning the IED using a lint-free cloth.
Diagnosing and resolving hardware and software faults.
Detailed technical specifications of the P153 relay.
Specifications for CT secondary, burden, and withstand capacity.
Details on nominal voltage, operating range, and burden.
Specifications for opto-isolated input voltage and burden.
Specifications for non-latching output contacts.
Accuracy tolerances for overcurrent and earth fault functions.
Operating value, time, and reset specifications for overcurrent.
Specifications for measured earth fault protection.
Specifications for derived earth fault protection.
Operating value, time, and reset for negative sequence overcurrent.
Operating value specifications for broken conductor detection.
Specifications for second harmonic blocking thresholds.
Operating time specifications for thermal overload.
Operating value and time specifications for undercurrent protection.
Time and operating value settings for cold load pickup.
Operating time and reset specifications for CB fail protection.
Environmental conditions including temperature and humidity.
Details on terminal types and torque specifications.
Mechanical design, weight, and pollution degree.
Lists tests performed against IEC standards.
Illustrates the electrical connections for the P153 relay.
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