International Electrotechnical Commission

AC motor capacitors – Part 1: General – Performance, testing and rating – Safety requirements – Guidance for installation and operation - Edition 2.1; Consolidated Reprint
 N 60252-1

Annotation

Scope and object

This part of IEC 60252 applies to motor capacitors intended for connection to windings of asynchronous motors supplied from a single-phase system having a frequency up to and including 100 Hz, and to capacitors to be connected to three-phase asynchronous motors so that these motors may be supplied from a single-phase system.

This standard covers impregnated or unimpregnated capacitors having a dielectric of paper, plastic film, or a combination of both, either metallized or with metal-foil electrodes, with rated voltages up to and including 660 V.

Motor start capacitors are covered by IEC 60252-2.

NOTE The following are excluded from this standard:

– shunt capacitors of the self-healing type for a.c. power systems of up to and including 1 000 V nominal voltage (see IEC 60831-1);

– shunt capacitors of non-self-healing type for a.c. power systems of up to and including 1 000 V nominal voltage (see IEC 60931-1);

– shunt capacitors for a.c. power systems having a nominal voltage above 1 000 V (see IEC 60871-1);

– capacitors for induction heat-generating plants, operating at frequencies between 40 Hz and 24 000 Hz (see IEC 60110-1);

– series capacitors (see IEC 60143);

– coupling capacitors and capacitor dividers (see IEC 60358);