IS 2993 : Part 2 : 2024/IEC 60252-2 : 2010 + AMD 1 : 2013 a.c. Motor Capacitors - Part 2 Motor Start Capacitors

ICS 31.060.30; 31.060.70

ETD 29

NATIONAL FOREWORD

This Indian Standard (Part 2) (Third revision) which is identical to IEC 60252-2 : 2010 + AMD 1 : 2013 'a.c. motor capacitors - Part 2: Motor start capacitors' issued by the International Electrotechnical Commission (IEC) was adopted by the Bureau of Indian Standards on the recommendation of the Power Capacitors Sectional Committee and approval of the Electrotechnical Division Council.

This revision of IS 2993 has been brought out to to harmonize it with the latest version of IEC 60252. This standard is published in two parts. Other part in this series is:

Part 1 General - Performance, testing and rating - Safety requirements - Guidance for installation and operation

Part 1 Deals with 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, and

Part 2 Deals with motor start capacitors intended for connection to windings of asynchronous motors supplied from a single-phase system having the frequency of the mains.

This edition includes the following changes with respect to the previous edition:

a) Definition of segmented film capacitors;

b) Clearer definition of the purpose of d.c. conditioning in destruction test.

c) Classes of safety protection has been redefined 3.29;

d) Destruction test has been redefined 5.1.16;

e) New type test 'Resistance to heat, fire and tracking' 5.1.17 added; and

f) Electrolytic motor start capacitor has been included 6.

The text of the IEC standard has been approved as suitable for publication as an Indian Standard without deviations. Certain conventions are, however, not identical to those used in Indian Standards. Attention is particularly drawn to the following:

a) Wherever the words 'International Standard' appear referring to this standard, they should be read as 'Indian Standard'; and

b) Comma (,) has been used as a decimal marker, while in Indian Standards the current practice is to use a point (.) as the decimal marker.