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scheider electric MiCOM P746 - User Manual

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

Table of Contents

Questions and Answers

  • C
    Cody LawsonAug 2, 2025
    What to do if programmable scheme logic error due to excessive execution time on Schneider Electric Protection Device?
    • J
      Jacob MartinezAug 2, 2025
      If you encounter a programmable scheme logic error due to excessive execution time, restore default settings by performing a power up with the specified keys depressed.
  • D
    Dustin Becker IVAug 12, 2025
    What to do if Schneider Electric Protection Device relay settings are corrupted?
    • J
      James SullivanAug 12, 2025
      If your relay settings are corrupted, restore defaults to allow the power-up to be completed.
  • L
    Lori CombsAug 21, 2025
    What to do if opto-isolated inputs fail on Schneider Electric Protection Device?
    • B
      Brandon LaraAug 21, 2025
      If the opto-isolated input state is not being correctly read by the relay the applied signal should be tested. Verify the connections to the opto-isolated input using the correct wiring diagram.

Summary

MiCOM P746 Technical Manual

Safety Section

Provides essential safety statements and external label information for Schneider Electric equipment.

Introduction to MiCOM

Explains the MiCOM concept, its range of components, systems, and services from Schneider Electric.

Technical Data

Details technical specifications including settings, accuracy limits, operating conditions, ratings, and performance data.

Getting Started

Provides guidance on initial setup, user interfaces, menu structure, and basic operations of the MiCOM P746 relay.

Application Notes

Details protection functions and provides worked examples on how settings are applied to the relay for various applications.

Programmable Logic

Explains the purpose and use of programmable scheme logic (PSL) for configuring individual protection schemes.

Firmware Design

Details the relay system architecture, hardware modules, and software overview including protection and control functions.

Troubleshooting

Provides guidance on identifying and resolving common errors, mal-operations, and hardware/software issues.

Commissioning and Maintenance

Covers product checks, setting application, relay operation demonstration, on-load checks, and final verification procedures.

SCADA Communications

Details the remote communication interfaces, protocols (Courier, MODBUS, IEC60870-5-103, DNP3.0, Ethernet), and data models.

Symbols and Glossary

Provides explanations of logic symbols, timers, logic gates, and defines technical terms used throughout the documentation.

Installation

Covers procedures for receiving, handling, storing, unpacking, mounting, and wiring the MiCOM P746 relay.

Remote HMI

Explains the MiCOM P746 Remote HMI application for scheme design, dynamic synoptic display, and menu operations.

Cyber Security

Details the need for cyber security, relevant standards (NERC, IEEE), and the cyber security implementation in PX40 relays.

Firmware and Service Manual Version History

Provides a history of software versions, hardware suffixes, original dates of issue, and descriptions of changes for the P746 relay.

scheider electric MiCOM P746 Specifications

General IconGeneral
Brandscheider electric
ModelMiCOM P746
CategoryProtection Device
LanguageEnglish