GE P743 User Manual

Introduction
P74x/EN IT/N
a7
MiCOM P741, P742, P743
(IT) 1-
3
IT
1. 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:
P74x/EN IT Introduction
A guide to the MiCOM range of relays and the documentation structure. General safety
aspects of handling Electronic Equipment is discussed with particular reference to relay
safety symbols. Also a general functional overview of the relay and brief application
summary is given.
P74x/EN TD Technical Data
Technical data including setting ranges, accuracy limits, recommended operating conditions,
ratings and performance data. Compliance with norms and international standards is quoted
where appropriate.
P74x /EN GS Getting Started
A guide to the different user interfaces of the protection relay describing how to start using it.
This section provides detailed information regarding the communication interfaces of the
relay, including a detailed description of how to access the settings database stored within
the relay.
P74x /EN ST Settings
List of all relay settings, including ranges, step sizes and defaults, together with a brief
explanation of each setting.
P74x /EN OP Operation
A comprehensive and detailed functional description of all protection and non-protection
functions.
P74x /EN AP Application Notes
This section includes a description of common power system applications of the relay,
calculation of suitable settings, some typical worked examples, and how to apply the settings
to the relay.
P74x /EN PL Programmable Logic
Overview of the programmable scheme logic and a description of each logical node. This
section includes the factory default (PSL) and an explanation of typical applications.
P74x /EN MR Measurements and Recording
Detailed description of the relays recording and measurements functions including the
configuration of the event and disturbance recorder and measurement functions.
P74x /EN FD Firmware Design
Overview of the operation of the relay’s hardware and software. This section includes
information on the self-checking features and diagnostics of the relay.
P74x /EN CM Commissioning
Instructions on how to commission the relay, comprising checks on the calibration and
functionality of the relay.
P74x /EN MT Maintenance
A general maintenance policy for the relay is outlined.
P74x /EN TS Troubleshooting
Advice on how to recognize failure modes and the recommended course of action. Includes
guidance on who in General Electric to contact for advice.

GE P743 Specifications

General

Brand	GE
Model	P743
Category	Relays
Language	English