Hivatkozási szám

MSZ EN IEC 60255-187-1:2022

Dokumentumazonosító

178380

Cím

Mérőrelék és védelmi készülékek. 187-1. rész: A differenciálvédelem működési követelményei. Motorok, generátorok és transzformátorok fékezett és nem fékezett differenciálvédelme (IEC 60255-187-1:2021)

Angol cím

Measuring relays and protection equipment. Part 187-1: Functional requirements for differential protection. Restrained and unrestrained differential protection of motors, generators and transformers (IEC 60255-187-1:2021)

Alkalmazási terület

This part of IEC 60255 specifies the minimum requirements for functional and performance evaluation of (longitudinal) differential protection designed for the detection of faults in ac motors, generators and transformers. This document also defines how to document and publish performance test results. This document covers the differential protection function whose operating characteristic can be defined on a bias-differential plane. It includes specification of the protection function, measurement characteristics, compensation of energizing quantities, additional restraint or blocking methods (for overexcitation and magnetizing inrush), starting and time delay characteristics. This document also covers unrestrained differential protection functions traditionally combined with the restrained (biased) differential element to form a single differential relay. This document defines the influencing factors that affect the accuracy under steady state conditions and performance characteristics during dynamic conditions. The test methodologies for verifying performance characteristics and accuracy are also included in this document. This document also includes current transformer requirements for the protection functions. The differential protection functions covered by this document are as follows: Táblázat This document does not specify the functional description of additional features often associated with biased differential relays such as current transformer (CT) supervision (CTS), switch onto fault (SOTF) and detection of geo-magnetically induced currents (GIC). This document does not cover differential relays designed for bus bar protection (including high impedance differential protection and low impedance differential protection) or line protection. Additionally, this document does not explicitly cover generator incomplete longitudinal differential protection, generator split-phase transverse differential protection, self-balancing or magnetic balanced protection scheme, differential protection of phase-shifting transformers, directional restricted earth fault protection, railway transformers, convertor transformers and reactors. However, the principles covered by this document can be extended to provide guidance on these applications. The general requirements for measuring relays and protection equipment are defined in IEC 60255-1.

ICS

29.120.70 Relék

Műszaki Bizottság

A szabvány nyelve

angol

Az érvényesség kezdete

2022-04-01

Forrás

idt IEC 60255-187-1:2021/COR1:2023-04; idt EN IEC 60255-187-1:2021/AC:2023; idt IEC 60255-187-1:2021; idt EN IEC 60255-187-1:2021

Előd

Utód

Módosítás

SZK-közlemények

2023/07: Helyesbítés

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