IEC 62146-1 Ed. 2.0 b:2026

Current Revision
Capacitors for high-voltage alternating current circuit-breakers - Part 1: General and grading capacitors

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Capacitors for high-voltage alternating current circuit-breakers - Part 1: General and grading capacitors

PUBLISH DATE 2026

IEC 62146-1:2026 is available as IEC 62146-1:2026 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.

IEC 62146-1:2026 includes generalities of capacitors used on alternating current circuit-breakers and introduces specifications for grading capacitors. Regarding grading capacitors, their function is to control the voltage distribution across the individual interrupter units of a multi-break circuit-breaker.

This document applies to grading capacitors falling into one or both of the following categories for:

  • mounting on air-insulated circuit-breakers.
  • mounting on enclosed circuit-breakers (for example immersed in insulating gas, in oil, etc.).

The object of this document is:

  • to define uniform rules regarding performances, testing and rating;
  • to define specific safety rules;
  • to provide a guidance for installation and operation.

This document does not apply to capacitors not directly associated with high-voltage alternating current circuit-breakers.

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