Corrigendum 1 - Insulation co-ordination - Part 11：Definitions, principles and rules for HVDC system

Corrigendum 1 - Coordination de l'isolement - Partie 11: Définitions, principes et règles relatifs au réseau CCHT

General Information

Status: Published
Publication Date: 28-Nov-2023

ICS: 29.080.30 - Insulation systems

Technical Committee: TC 99 - Insulation co-ordination and system engineering of high voltage electrical power installations above 1,0 kV AC and 1,5 kV DC
Drafting Committee: JWG 13 - TC 99/JWG 13

Current Stage: PPUB - Publication issued
Start Date: 29-Nov-2023
Completion Date: 24-Jan-2024

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Corrects: IEC 60071-11:2022 - Insulation co-ordination - Part 11：Definitions, principles and rules for HVDC system
Effective Date: 03-Nov-2023

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IEC 60071-11:2022/COR1:2023 - Corrigendum 1 - Insulation co-ordination - Part 11:Definitions, principles and rules for HVDC system
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IEC 60071-11:2022/COR1:2023 - Corrigendum 1 - Insulation co-ordination - Part 11:Definitions, principles and rules for HVDC system Released:11/29/2023

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Frequently Asked Questions

What is IEC 60071-11:2022/COR1:2023?

IEC 60071-11:2022/COR1:2023 is a standard published by the International Electrotechnical Commission (IEC). Its full title is "Corrigendum 1 - Insulation co-ordination - Part 11：Definitions, principles and rules for HVDC system". This standard covers: Corrigendum 1 - Insulation co-ordination - Part 11：Definitions, principles and rules for HVDC system

What is the scope of IEC 60071-11:2022/COR1:2023?

Corrigendum 1 - Insulation co-ordination - Part 11：Definitions, principles and rules for HVDC system

What ICS categories does IEC 60071-11:2022/COR1:2023 belong to?

IEC 60071-11:2022/COR1:2023 is classified under the following ICS (International Classification for Standards) categories: 29.080.30 - Insulation systems. The ICS classification helps identify the subject area and facilitates finding related standards.

What standards are related to IEC 60071-11:2022/COR1:2023?

IEC 60071-11:2022/COR1:2023 has the following relationships with other standards: It is inter standard links to IEC 60071-11:2022. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

How can I access IEC 60071-11:2022/COR1:2023?

IEC 60071-11:2022/COR1:2023 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)

IEC 60071-11:2022/COR1:2023 - ...

© IEC 2023
INTERNATIONAL ELECTROTECHNICAL COMMISSION
COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE
____________
IEC 60071-11 IEC 60071-11
Edition 1.0 2022-11 Édition 1.0 2022-11

INSULATION CO-ORDINATION COORDINATION DE L'ISOLEMENT

Part 11: Definitions, principles and rules for Partie 11: Définitions, principes et règles
HVDC system relatifs au réseau CCHT

CO RRI G E NDUM 1
Corrections to the French version appear after the English text.
Les corrections à la version française sont données après le texte anglais.

Table C.1 – Typical DC voltages and switching/lightning impulse withstand voltage
In Table C.1, modify the first row below the column headings as shown below:
Presumed rated switching Presumed rated lightning impulse
Typical DC voltage
impulse withstand voltage withstand voltage
kV kV kV
(peak value) (peak value)
200 550
Table C.3 – Correlation between presumed rated lightning impulse withstand
voltages and minimum phase-to-earth a
...

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IEC

IEC 60071-2:2023(Main)

Insulation co-ordination - Part 2: Application guidelines

IEC 60071-2:2023 constitutes application guidelines and deals with the selection of insulation levels of equipment or installations for three-phase AC systems. Its aim is to give guidance for the determination of the rated withstand voltages for ranges I and II of IEC 60071‑1 and to justify the association of these rated values with the standardized highest voltages for equipment. This association is for insulation co-ordination purposes only. The requirements for human safety are not covered by this document. This document covers three-phase AC systems with nominal voltages above 1 kV, phase-to-earth, phase-to-phase and longitudinal insulation. It has the status of a horizontal standard in accordance with IEC Guide 108. This edition includes the following significant technical changes with respect to the previous edition:
a) Clause 4 Concepts governing the insulation co-ordination has been added.
b) Subclause 5.3 has been revised, and Subclause 5.4 Detailed simulation has been added because it is widely applied in the recent practices of insulation coordination.
c) Special considerations for cable line and GIL/GIB have been added in Clause 9.
d) Annex K (informative) Application of line shunt reactor to limitation of TOV and SFO in high voltage overhead transmission lines has been added.
e) Annex L (informative) Calculation of lightning stroke rate and lightning outage rate has been added.

Standard
564 pages
English language
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Standard
378 pages
English and French language
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23-May-2023
29.080.30
TC 99

IEC

IEC 60071-11:2022(Main)

Insulation co-ordination - Part 11：Definitions, principles and rules for HVDC system

IEC 60071-11:2022 applies to high-voltage direct current (HVDC) systems. It specifies the principles on the procedures for the determination of the specified withstand voltages, creepage distance and air clearances for the equipment and the installations of these systems.
This document gives the insulation co-ordination principles related to line commutated converter (LCC) and voltage sourced converters (VSC) HVDC systems. The main principles of this document also apply to other special converter configurations of LCC, such as the capacitor commutated converter (CCC) as well as the controlled series compensated converter (CSCC), etc.
This document applies to insulation co-ordination of equipment connected between the converter AC bus (including the AC harmonic filters, the converter transformer, the circuit breakers) and the DC line side. The line and cable terminations in so far as they influence the insulation co-ordination of converter station equipment are also covered.
This document applies only for HVDC applications in power systems and not for industrial conversion equipment. Principles and guidance given are for insulation co-ordination purposes only. The requirements for human safety are not covered by this document.
This international standard replaces, in conjunction with IEC 60071-12, IEC 60071-5 published in 2014.
This edition includes the following significant technical changes with respect to IEC 60071‑5:2014:
This standard applies to both LCC and VSC HVDC systems whereas IEC 60071-5 only dealt with LCC HVDC system;
Annex C (normative) gives the recommended specified withstand voltage (LI and SI);
Annex C (normative) gives the minimum air clearances;
Annex E shows the correlation of clauses between this standard and IEC 60071-5:2014.
The contents of the corrigendum of November 2023 have been included in this copy.

Standard
77 pages
English and French language
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TC 99

IEC

IEC 60071-12:2022(Main)

Insulation co-ordination - Part 12: Application guidelines for LCC HVDC converter stations

IEC 60071-12:2022 applies guidelines on the procedures for insulation co-ordination of line commutated converter (LCC) stations for high-voltage direct current (HVDC) project, whose aim is evaluating the overvoltage stresses on the converter station equipment subjected to combined DC, AC power frequency, harmonic and impulse voltages, and determining the specified withstand voltages for equipment.
This document deals only with metal-oxide surge arresters, without gaps, which are used in modern HVDC converter stations. The criteria for determining the protective levels of series and/or parallel combinations of surge arresters used to ensure optimal protection are also presented. Typical arrester protection schemes and stresses of arresters are presented.
Annex A contains examples of insulation co-ordination for LCC HVDC converters which support the concepts described in the main text, and the basic analytical techniques used.

Standard
138 pages
English and French language
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13-Oct-2022
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TC 99

IEC

IEC TS 61857-42:2025(Main)

Electrical insulation systems - Procedures for thermal evaluation - Part 42: Specific requirements for evaluation of an electrical insulation system (EIS) used for road transportation applications

IEC TS 61857-42:2025 provides a procedure to evaluate the lifetime of an electrical insulation system (EIS) in a drivetrain unit within road transportation (automotive) applications. Typical applications include motors and generators in hybrid and full electric passenger vehicles, light-duty and heavy-duty commercial vehicles, as well as buses.
In general, the IEC 61857 series is applicable to EIS used in electrotechnical products with an input voltage of up to 1 000 V where the predominant ageing factor is thermal. In the context of this document the limit of 1 000 V is understood to be the application-specific battery DC voltage.
The EIS evaluated by this procedure will operate free from partial discharges over its whole lifetime.
Evaluation of EIS in the following applications is outside the scope:
- motors and generators within the scope of IEC TC 2, Rotating machinery;
- rail traction machines in the scope of IEC TC 9, Electrical equipment and systems for railways;
- motors and generators for road vehicles that are not intended for the traction of them.

Technical specification
51 pages
English language
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14-Aug-2025
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TC 112

IEC

IEC 60664-1:2020/AMD1:2025(Amendment)

Amendment 1 - Insulation coordination for equipment within low-voltage supply systems - Part 1: Principles, requirements and tests

Standard
25 pages
English and French language
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05-May-2025
29.080.30
TC 109

IEC

IEC TR 61857-2:2025(Main)

Electrical insulation systems – Procedures for thermal evaluation – Part 2: Selection of the appropriate test method for evaluation and classification of electrical insulation systems

IEC TR 61857-2:2025 gives guidelines to identify the appropriate test method for the evaluation of a proposed electrical insulation system (EIS). Some of the standards evaluate the EIS using one stress factor which is thermal. Other standards evaluate the thermal stress factor with adjustments to the conditioning applied prior to the diagnostic testing to simulate applications in air. A third group of these standards when the application is other than in air. This technical report is applicable to existing or proposed EIS used in electrotechnical products across a wide range of operating voltages of IEC Standards. The report takes care to identify the appropriate standard based on construction and intended operating application.
For all performance and safety requirements related to an application, refer to the technical committee requirements for the application.
This edition includes the following significant technical changes with respect to the previous edition.
a) The Introduction is expanded to convey that both TC 112 and TC 2 have established EIS test standards.
b) Clause 4 introduces the fact that there are four stress factors, not only thermal. This essential concept carries over into part of Clause 5.
c) The large number of established standards are organized into common concept groups in Tables 1 to 5:
1) Table 1 covers an overview of EIS evaluations for background and structure.
2) Table 2 covers evaluation of test objects prior to the start of long-term thermal ageing using screening tests.
3) Table 3 covers test standards for the evaluation of thermal stresses in air and has an increased number of standards.
4) Table 4 covers standards for special environmental applications other than in air
5) Table 5 covers standards for the modification of an established EIS.

Technical report
11 pages
English language
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01-May-2025
29.080.30
TC 112

IEC

IEC TS 61934:2024(Main)

Electrical insulating materials and systems - Electrical measurement of partial discharges (PD) under short rise time and repetitive voltage impulses

IEC TS 61934:2024 is applicable to the off-line electrical measurement of partial discharges (PDs) that occur in electrical insulation systems (EISs) when stressed by repetitive voltage impulses generated from power electronics devices.
Typical applications are EISs belonging to apparatus driven by power electronics, such as motors, inductive reactors, wind turbine generators and the power electronics modules themselves.
NOTE Use of this document with specific products can require the application of additional procedures.
Excluded from the scope of this document are:
- methods based on optical or ultrasonic PD detection,
- fields of application for PD measurements when stressed by non-repetitive impulse voltages such as lightning impulse or switching impulses from switchgear.
This edition includes the following significant technical changes with respect to the previous edition:
a) background information on the progress being made in the field of power electronics including the introduction of wide band gap semiconductor devices has been added to the Introduction;
b) voltage impulse generators; the parameter values of the voltage impulse waveform have been modified to reflect application of wide band gap semiconductor devices.
c) PD detection methods; charge-based measurements are not described in this third edition nor are source-controlled gating techniques to suppress external noise.
d) Since the previous edition in 2011, there have been significant technical advances in this field as evidenced by several hundreds of publications. Consequently, the Bibliography in the 2011 edition has been deleted in this third edition.

Technical specification
27 pages
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IEC TR 61858-3:2020(Main)

Electrical insulation systems - Thermal evaluation of modifications to an established electrical insulation system (EIS) - Part 3: Clarification of electrical insulating materials (EIMs) and auxiliary materials

IEC TR 61858-3:2020(E) provides information on the identification of electrical insulating materials and auxiliary components for the assessment of modifications to an established insulation system and gives guidance on the selection of feasible test procedures.

Technical report
9 pages
English language
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29.080.30
TC 112

IEC

IEC 60664-1:2020/COR1:2020(Corrigendum)

Corrigendum 1 - Insulation coordination for equipment within low-voltage supply systems - Part 1: Principles, requirements and tests

Standard
2 pages
English and French language
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26-Oct-2020
29.080.30
TC 109

IEC

IEC 60664-1:2020(Main)

Insulation coordination for equipment within low-voltage supply systems - Part 1: Principles, requirements and tests

IEC 60664-1:2020 deals with insulation coordination for equipment having a rated voltage up to AC 1 000 V or DC 1 500 V connected to low-voltage supply systems. This document applies to frequencies up to 30 kHz. It applies to equipment for use up to 2 000 m above sea level and provides guidance for use at higher altitudes. It provides requirements for technical committees to determine clearances, creepage distances and criteria for solid insulation. It includes methods of electrical testing with respect to insulation coordination. The minimum clearances specified in this document do not apply where ionized gases are present. Special requirements for such situations can be specified at the discretion of the relevant technical committee. This document does not deal with distances:
– through liquid insulation;
– through gases other than air;
– through compressed air.
This edition includes the following significant technical changes with respect to the previous edition:
- update of the Scope, Clauses 2 and 3,
- addition of 1 500 V DC into tables,
- new structure for Clauses 4 and 5,
- addition of Annex G with a flowchart for clearances,
- addition of Annex H with a flowchart for creepage distances,
- update of distances altitude correction in a new Table F.10.
It has the status of a basic safety publication in accordance with IEC Guide 104. The contents of the corrigendum of October 2020 have been included in this copy.

Standard
175 pages
English language
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Standard
167 pages
English and French language
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25-May-2020
29.080.30
TC 109

Corrigendum 1 - Insulation co-ordination - Part 11：Definitions, principles and rules for HVDC system

Corrigendum 1 - Coordination de l'isolement - Partie 11: Définitions, principes et règles relatifs au réseau CCHT

General Information

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IEC 60071-11:2022/COR1:2023 - Corrigendum 1 - Insulation co-ordination - Part 11:Definitions, principles and rules for HVDC system Released:11/29/2023

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