IS 2993 : Part 1 : 2024/IEC 60252-1 : 2010 + AMD 1 : 2013 a.c. Motor Capacitors - Part 1 General - Performance, Testing and Rating - Safety Requirements - Guidance for Installation and Operation

ICS 31.060.30; 31.060.70

ETD 29

(Superseding IS 1709 : 1984)

NATIONAL FOREWORD

This Indian Standard (Part 1) (Third Revision) which is identical to IEC 60252-1 : 2010 + AMD 1 : 2013 'a.c. Motor capacitors - Part 1: General - Performance, testing and rating - Safety requirements - Guidance for installation and operation' 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 taken to harmonize it with the latest version of IEC 60252.

IS 2293 Part 1 covers fan drive application which was earlier covered in IS 1709: 1984. With the publication of this standard, IS 1709, would be withdrawn

This standard is published in two parts. Other part in this series is:

Part 2 Motor start capacitors

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 significant technical changes with respect to the previous edition:

a) The definition of "segmented capacitors" has been added in 3.6;

b) The definition of "classes of operation" has been clarified, with the addition of the concept of "probable life" with reference to statistics, in 3.9;

c) The following wording "Operation above the rated voltage will reduce the life expectancy of the capacitor" has been introduced in 6.1;

d) Some clarifications have been added to Clause 8, Marking, mainly for small capacitors.

e) Classes of safety protection has been redefined 3.22;

f) Destruction test has been redefined 5.16; and

g) New type test 'Resistance to heat, fire and tracking' added 5.17.

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.