Standards Development

Scope

This International Standard applies to capacitors for power electronics applications that are defined as components.

The operating frequency of the systems in which these capacitors are used is usually up to 15 kHz, while the pulse frequencies can reach up to 10 times the operating frequency.

The document distinguishes between AC and DC capacitors and covers an extremely wide range of capacitor technologies for numerous applications, e.g. overvoltage protection, DC and filtering, switching circuits, energy storage, auxiliary inverters, etc. The following are excluded from this document:

– Power capacitors for induction heating installations in a frequency range up to 50 kHz (see IEC 60110-1:1998 [1] and IEC TS 60110-2:2000 [2]);

– AC motor capacitors (see IEC 60252-1:2010 [3] and IEC 60252-2 [4] I);

– capacitors to be used in circuits for blocking one or more harmonics in power supply networks;

– Capacitors for use in tubular fluorescent and other discharge lamp circuits (see IEC 61048:2006 [5] and IEC 61049 [6] );

– capacitors for suppression of radio interference (see IEC 60384-14:2013 [7]);

– shunt capacitors for AC power systems having a rated voltage above 1 000 V (seeIEC 60871-1:2014 [8] and IEC TS 60871-2 [9] );

– shunt power capacitors of the self-healing type for AC systems having a rated voltage up to and including 1 000 V (see IEC 60831-1:2014 [10] and IEC 60831-2:2014 [11]);

– shunt power capacitors of the non-self-healing type for AC systems having a rated voltage up to and including 1 000 V (see IEC 60931-1 [12] and IEC 60931-2 [13] standards);

– electronic capacitors not used in power circuits;

– series capacitors for power systems (see IEC 60143 (all parts) [14]);

– coupling capacitors and capacitor dividers (see IEC 60358-1 [15] );

– capacitors for microwave ovens (see IEC 61270-1:1996 [16]).

Examples of applications are given in 9.1.