1.1 Scope and object
This Part 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 Part 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 will be covered by GB/T 3667.2.
Note: The following are excluded from this Part:
— shunt capacitors of the self-healing type for a.c. power systems of up to and including 1 000 V nominal voltage;
— shunt capacitors of non-self-healing type for a.c. power systems of up to and including 1 000 V nominal voltage;
— shunt capacitors for a.c. power systems having a nominal voltage above 1 000 V;
— capacitors for induction heat-generating plants, operating at frequencies between 40 Hz and 24 000 Hz;
— series capacitors;
— coupling capacitors and capacitor dividers;
— capacitors to be used in power electronic circuits;
— small a.c. capacitors to be used for fluorescent and discharge lamps;
— 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
a) to formulate uniform rules regarding performance, testing and rating;
b) to formulate specific safety rules;
c) to provide a guide for installation and operation.
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1.2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this Part of GB/T 3667. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this Part are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T 2423.3 Basic environmental testing procedures for electric and electronic products — Test Ca: Damp heat, steady state (GB/T 2423.3-1993, eqv IEC 60068-2-3:1984)
GB/T 2423.10 Basic environmental testing procedures for electric and electronic products — Part 2: Test methods — Test Fc and guidance: Vibration (Sinusoidal) (GB/T 2423.10-1995, idt IEC 60068-2-6:1982)
GB 2423.28 Basic environmental testing procedures for electric and electronic products — Part 2: Test methods — Test T :Soldering (GB 2423.28-1982, eqv IEC 60068-2-20:1979)
GB/T 2423.29 Basic environmental testing procedures for electric and electronic products — Part 2: Test methods — Test U: Robustness of terminations and integral mounting devices (GB/T 2423.29-1999, idt IFC 60068-2-21:1992)
GB/T 4207 Method for determining the comparative and the proof tracking indices of solid insulating materials under moist conditions (GB/T 4207-2003, IEC 60112:1979, IDT)
GB 4208-1993 Degrees of protection provided by enclosures (IP Code) (eqv IEC 60529:1989)
GB/T 5169.10 Fire hazard testing for electric and electronic products — Test methods — Glow-wire test methods — General (GB/T 5169.10-1997, idt IEC 60695-2-1/0:1994)
GB/T 5169.11 Fire hazard testing for electric and electronic products — Test methods — Glow-wire end-product test and (GB/T 5169.11-1997, idt IEC 60695-2-1/1:1994)
GB/T 11918-2001 Plugs, socket-outlets and couplers for industrial purposes — Part 1: General requirements (idt IEC 60309-1:1999)
ISO 4046:1978 Paper, board, pulp and related terms — Vocabulary
1.3 Definitions
For the purpose of this Part, the following definitions apply.
1.3.1
Motor running capacitor
GB/T 3667.1-2005 The following standards are cited：
