IS 12746 : Part 1 : Sec 2 : 1993/IEC PUB 870-1-2 : 1989 Telecontrol equipment and systems : Part 1 General considerations, Section 2 Guide for specifications

NATIONAL FOREWORD

This Indian Standard which is identical with lEC Pub 870-1-2 (1989) 'Telecontrol equipment and systems - Part 1 : General considerations, Section 2 - Guide for specifications', issued by the International Electrotechnical Commission ( lEC ) was adopted by the Bureau of Indian Standard5 on the recommendation of the Power Line Carrier Systems and Associated Telecontrol Equipment Sectional Committee ( LTD 2S ) and approval of the Electronics and Telecommunication Division Council.

Thc tcxt of the IEC Pub has been approved as suitable for publication as 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'.

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.