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: ?C mounting on air-insulated circuit-breakers; ?C 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: ?C to define uniform rules regarding performances@ testing and rating; ?C to define specific safety rules; ?C to provide a guidance for installation and operation.
IEC 62146-1:2013 history
2016IEC 62146-1:2013/AMD1:2016 Amendment 1 - Grading capacitors for high-voltage alternating current circuit-breakers - Part 1: General
2016IEC 62146-1:2016 Condensateurs de répartition pour disjoncteurs à courant alternatif haute tension – Partie 1: Généralités (Edition 1.1; Consolidated Reprint)
2013IEC 62146-1:2013 Grading capacitors for high-voltage alternating current circuit-breakers - Part 1: General