IEC TR 61869-100-2017 cor1-2023 PDF

Full title and description

St IEC TR 61869-100-2017 cor1-2023 — Corrigendum 1 to IEC TR 61869-100:2017, "Instrument transformers — Part 100: Guidance for application of current transformers in power system protection". This document is a short corrigendum that corrects and clarifies formulae, editorial items and a small number of technical expressions in the 2017 Technical Report to ensure correct interpretation and application of the guidance for protective (inductive) current transformers.

Abstract

This publication is Corrigendum 1 to IEC TR 61869-100:2017. It contains a small set of corrections (mathematical formula corrections and editorial clarifications) to the original Technical Report so that calculations and guidance on current‑transformer transient behaviour and application in protection schemes are accurate and unambiguous. The corrigendum is short (2 pages) and is intended to be read together with the base TR (2017) which provides comprehensive guidance for the application of inductive protective current transformers.

General information

• Status: Published (Corrigendum to IEC TR 61869-100:2017)
• Publication date: 18 October 2023 (Corrigendum); base TR published 20 January 2017.
• Publisher: IEC — International Electrotechnical Commission (Technical Committee TC 38, Instrument Transformers)
• ICS / categories: 17.220.20 — Measurement of electrical and magnetic quantities
• Edition / version: Edition 1.0; Corrigendum 1 (2023) to IEC TR 61869-100:2017 (Ed.1.0)
• Number of pages: 2 (corrigendum). The base Technical Report (IEC TR 61869-100:2017) is 135 pages.

Scope

The corrigendum amends and clarifies specific passages in IEC TR 61869-100:2017. It corrects mathematical expressions and associated keys and replaces a small set of formulae and explanatory text (notably in Clause 6.1.3.3 and related transient‑behaviour passages) so that the guidance on current transformer response to short‑circuit and transient signals is accurate. The corrigendum does not change the overall intent or normative requirements of other parts of the IEC 61869 family; it is to be used together with the full 2017 Technical Report.

Key topics and requirements

• Corrections to mathematical formulae used to describe CT transient response (example: revisions in Clause 6.1.3.3 addressing Range 1 transient equations).
• Clarifications to timing and waveform definitions used in CT transient/performance examples.
• Editorial fixes and corrections to keys/notations to remove ambiguity in examples and derivations.
• Guidance reaffirming responsibilities of relay manufacturers, CT manufacturers and system/ project engineers when applying TR guidance in protection designs.
• Instruction that the corrigendum text is to be read together with IEC TR 61869-100:2017 (base document) — the corrigendum does not replace the TR but corrects and refines parts of it.

Typical use and users

This corrigendum (and the base TR) is used by protection engineers, relay and CT manufacturers, laboratory and test engineers, power system planners and consultants who require authoritative guidance on how inductive current transformers behave under fault/transient conditions and how to apply CTs in protection systems. It is also relevant to standards committees and technical authors who reference IEC TR 61869‑100 in technical documentation or product design.

Related standards

Main related documents are the IEC 61869 series (in particular IEC 61869-1 General requirements and IEC 61869-2 Additional requirements for current transformers). Other related parts include IEC 61869-6 (low‑power instrument transformers), IEC 61869-9 (digital interface for instrument transformers) and other product and TR/TS parts of the 61869 family. National adoptions and adjustments of these parts (EN/IEC, national bodies) are commonly used alongside the TR for practical application.

Keywords

Instrument transformers; current transformers (CT); protective current transformers; corrigendum; transient response; short-circuit waveforms; protection engineering; IEC 61869; TC 38.

FAQ

Q: What is this standard?

A: It is Corrigendum 1 (2023) to IEC TR 61869-100:2017 — a two‑page correction document that amends specific formulae and editorial items in the 2017 Technical Report "Guidance for application of current transformers in power system protection".

Q: What does it cover?

A: The corrigendum corrects and clarifies mathematical expressions, keys and a small number of textual items in the base TR so that the guidance on CT transient behaviour and application in protection systems is accurate and unambiguous. It is to be read together with IEC TR 61869-100:2017.

Q: Who typically uses it?

A: Protection engineers, CT and relay manufacturers, test laboratories, system planners, consultants and standards writers who apply or reference IEC TR 61869-100 in design, testing and specification of protective current transformer installations.

Q: Is it current or superseded?

A: The corrigendum was published on 18 October 2023 and corrects the 2017 Technical Report (base TR published 20 January 2017). The corrigendum is current as an amendment to the 2017 TR; corrected copies of the TR incorporate the corrigendum. The TR/corrigendum lifecycle shows a stability indication through 2027 for the base TR.

Q: Is it part of a series?

A: Yes. IEC TR 61869-100 is part of the IEC 61869 family (instrument transformers). It is a technical report that complements the product standards in the 61869 series (for example IEC 61869-1 and IEC 61869-2) and provides application guidance rather than normative product requirements.

Q: What are the key keywords?

A: Instrument transformers; current transformer; CT transient; protection; corrigendum; IEC 61869; TC 38; waveform; short‑circuit; transient performance.