IEC 62146-1:2016 PDF

Scope: This part of the IEC 62146 series is applicable to grading capacitors used on circuit-breakers. Their function is to control the voltage distribution across the individual interrupter units of a multi-break circuit-breaker. Grading capacitors can also be used in parallel to the interrupter unit on single break circuitbreakers to modify the Transient Recovery Voltage (TRV). The grading capacitor is a sub-component for the circuit-breaker and shall be specified in accordance with the circuit-breaker specifications. This standard 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 SF6@ in oil@ etc.). The testing for each of the above applications is in some cases different. The object of this standard is: ? to define uniform rules regarding performances@ testing and rating; ? to define specific safety rules; ? to provide a guidance for installation and operation. NOTE CIGRE Technical Brochure 368 [2] presents a study about the operating environment of voltage grading capacitors applied to high-voltage circuit-breakers. This standard does not apply to phase-to-earth capacitors installed on the circuit-breaker to modify the Transient Recovery Voltage.

IEC 62146-1:2016 history

2016 IEC 62146-1:2013/AMD1:2016 Amendment 1 - Grading capacitors for high-voltage alternating current circuit-breakers - Part 1: General
2016 IEC 62146-1:2016 Condensateurs de répartition pour disjoncteurs à courant alternatif haute tension – Partie 1: Généralités (Edition 1.1; Consolidated Reprint)
2013 IEC 62146-1:2013 Grading capacitors for high-voltage alternating current circuit-breakers - Part 1: General