IEC 60505:2011/COR1:2017
(Corrigendum)Corrigendum 1 - Evaluation and qualification of electrical insulation systems
Corrigendum 1 - Evaluation and qualification of electrical insulation systems
Corrigendum 1 - Evaluation et qualification des systèmes d'isolation électrique
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IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE
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IEC 60505 IEC 60505
Edition 4.0 2011-07 Édition 4.0 2011-07
EVALUATION AND QUALIFICATION ÉVALUATION ET QUALIFICATION
OF ELECTRICAL INSULATION SYSTEMS DES SYSTÈMES D'ISOLATION ÉLECTRIQUE
CORRIGENDUM 1
Foreword Avant-propos
Replace the third paragraph starting with Remplacer le troisième alinéa
"The main change" with the following new commençant par "La principale
text modification" par le nouveau texte s
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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.
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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.
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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.
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This document is for applications where the stresses are some combination of other factors of influence identified in IEC 60505. The multi-factor stresses are applied during the diagnostic portion of each test cycle.
A few examples of other factors of influence or multi-factor stresses are:
– high vibration;
– submersion in oils, water, or solutions;
– voltage higher than the test voltage of the reference EIS;
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