BS EN 60252-1:2011+A1:2013 - Page 2

AC motor capacitors. General. Performance, testing and rating. Safety requirements. Guidance for installation and operation | Status: Current

1 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);
• – capacitors to be used in power electronic circuits (see IEC 61071);
• – small a.c. capacitors to be used for fluorescent and discharge lamps (see IEC 61048);
• – capacitors for suppression of radio interference (IEC publication under consideration);
• – capacitors intended to be used in various types of electrical equipment and thus considered as components;
• – capacitors intended for use with d.c. voltage superimposed on a.c. voltage.

The object of this standard is

1. a) to formulate uniform rules regarding performance, testing and rating;
2. b) to formulate specific safety rules;
3. c) to provide a guidance for installation and operation.