BS EN 61071:2007 PDF

1 Scope This International Standard applies to capacitors for power electronics applications. The operating frequency of the systems in which these capacitors are used is usually up to 15kHz, while the pulse frequencies may be up to 5 to 10 times the operating frequency. The standard distinguishes between a.c. and d.c. capacitors which are considered as components when mounted in enclosures. This standard covers an extremely wide range of capacitor technologies for numerous applications, e.g. overvoltage protection, d.c. and a.c. filtering, switching circuits, d.c. energy storage, auxiliary inverters, etc. The following are excluded from this standard:

capacitors for induction heat-generating plants operating at frequencies between 40 Hz and 24 000 Hz (see IEC 60110‑1 and IEC 60110‑2 ); capacitors for motor applications and the like (see IEC 60252‑1 and IEC 60252 ‑2 ); capacitors to be used in circuits for blocking one or more harmonics in power supply networks;