BS EN 62146-1:2014+A1:2016 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.

Cross References:
CISPR 18-2:1986
IEC Guide 109
IEC 60050
IEC 60060-1:2010
EN 60060-1:2010
IEC 60068-2-17:1994
EN 60068-2-17:1994
IEC 60071-1:2006
EN 60071-1:2006
IEC 60270:2000
IEC 60270:2000/Corrigendum 1:2001
EN 60270:2001
IEC 60376:2005
EN 60376:2005
IEC 60507:1991
EN 60507:1993
IEC 60567:2011
EN 60567:2011
IEC 60721-1:1990
IEC 60721-1:1990/A1:1992
IEC 60721-1:1990/A2:1995
EN 60721-1:1995
EN 60721-1:1995/A2:1995
IEC/TS 60815
IEC 61462:2007
EN 61462:2007
IEC 62155:2003
EN 62155:2003
IEC 62271-1:2007
EN 62271-1:2008
IEC 62271-100:2008
EN 62271-100:2009
IEC 62271-203:2003
EN 62271-203:2004
IEC/TR 62271-300:2006
IEC 60068-2-11
EN 60068-2-11
IEC 60068-2-42
EN 60068-2-42


Incorporates the following:
Amendment, November 2016. Amends and replaces BS EN 62146-1:2014