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IEC TR 61869-100:2017

Current
Current

The latest, up-to-date edition.

Instrument transformers - Part 100: Guidance for application of current transformers in power system protection
Available format(s)

Hardcopy , PDF 1 User , PDF 3 Users , PDF 5 Users , PDF 9 Users

Language(s)

English

Published date

20-01-2017

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions and abbreviations
4 Responsibilities in the current transformer design
   process
5 Basic theoretical equations for transient designing
6 Duty cycles
7 Determination of the transient dimensioning factor
   K[td] by numerical calculation
8 Core saturation and remanence
9 Practical recommendations
10 Relations between the various types of classes
11 Protection functions and correct CT specification
Annex A (informative) - Duty cycle C - O software code
Annex B (informative) - Software code for numerical
        calculation of K[td]
Bibliography

IEC TR 61869-100:2017(E) is applicable to inductive protective current transformers meeting the requirements of the IEC 61869-2 standard.
It may help relay manufacturers, CT manufacturers and project engineers to understand how a CT responds to simplified or standardized short circuit signals. Therefore, it supplies advanced information to comprehend the definition of inductive current transformers as well as their requirements.
The document aims to provide information for the casual user as well as for the specialist. Where necessary, the level of abstraction is mentioned in the document. It also discusses the question about the responsibilities in the design process for current transformers.
The contents of the corrigendum of October 2023 have been included in this copy.

Committee
TC 38
DevelopmentNote
Stability Date: 2019. (01/2017)
DocumentType
Technical Report
Pages
135
PublisherName
International Electrotechnical Committee
Status
Current

EN 50152-3-2:2016 Railway applications - Fixed installations - Particular requirements for a.c. switchgear - Part 3-2: Measurement, control and protection devices for specific use in a.c. traction systems - Current transformers
I.S. EN 50152-3-2:2016 RAILWAY APPLICATIONS - FIXED INSTALLATIONS - PARTICULAR REQUIREMENTS FOR A.C. SWITCHGEAR - PART 3-2: MEASUREMENT, CONTROL AND PROTECTION DEVICES FOR SPECIFIC USE IN A.C. TRACTION SYSTEMS - SINGLE-PHASE CURRENT TRANSFORMERS
UNE-EN 50152-3-2:2016 Railway applications - Fixed installations - Particular requirements for a.c. switchgear - Part 3-2: Measurement, control and protection devices for specific use in a.c. traction systems - Current transformers

IEC 61869-2:2012 Instrument transformers - Part 2: Additional requirements for current transformers
IEC 60617-3:1996 Graphical symbols for diagrams - Part 3: Conductors and connecting devices
IEC 60909-0:2016 Short-circuit currents in three-phase a.c. systems - Part 0: Calculation of currents
IEC 61869-1:2007 Instrument transformers - Part 1: General requirements
IEC 60255-121:2014 Measuring relays and protection equipment - Part 121: Functional requirements for distance protection
IEC 60044-1:1996+AMD1:2000+AMD2:2002 CSV Instrument transformers - Part 1: Current transformers
IEC 60255-1:1967 Electrical relays - Part 1: Instantaneous all-or-nothing relays
IEC 60255-127:2010 Measuring relays and protection equipment - Part 127: Functional requirements for over/under voltage protection
IEC 60255-151:2009 Measuring relays and protection equipment - Part 151: Functional requirements for over/under current protection
IEC 60050-321:1986 International Electrotechnical Vocabulary (IEV) - Part 321: Instrument transformers
IEC 60255-149:2013 Measuring relays and protection equipment - Part 149: Functional requirements for thermal electrical relays

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