IS/IEC 60371 : PART 3 : SEC 1 : 2003 : Specification for insulating materials based on mica, Part 3 Specification for individual materials, Section 1 Commutator Separators and materials

NATIONAL FOREWORD

This Indian Standard (Part 3/Sec 1) which is identical with IEC 60371-3-1 : 2006 ‘Specification for insulating materials based on mica — Part 3: Specifications for individual materials — Sheet 1: Commutator separators and materials’ issued by the International Electrotechnical Commission (IEC) was adopted by the Bureau of Indian Standards on the recommendation of the Solid Electrical Insulating Materials and Insulating Systems Sectional Committee and approval of the Electrotechnical Division Council.

This standard was first published as IS 9299 (Part 3/Sec 1) : 1979 ‘Insulating materials based on built-up mica or treated mica paper: Part 3 Specification for individual materials, Section 1 Rigid mica material for commutator separators’. The committee has now decided to adopt the IEC Standard to harmonize it with the latest developments taken place at international level. This standard is now being published in single number based on IEC 60371 in various parts/sections. Other parts/sections in this series are:

Part 1 Definitions and general requirements

Part 2 Methods of test

Part 3 Specifications for individual materials,

Section 2 Mica paper

Section 3 Specification for rigid mica materials for heating equipment

Section 4 Polyester film-backed mica paper with a B-stage epoxy resin binder

Section 5 Glass-backed mica paper with an epoxy resin binder for post-impregnation (VPI)

Section 6 Glass-backed mica paper with a B-stage epoxy resin binder

Section 7 Polyester film mica paper with an epoxy resin binder for single conductor taping

Section 8 Mica paper tapes for flame-resistant security cables

Section 9 Moulding micanite

This standard supersedes IS 9299 (Part 3/Sec 1) : 1979 and after the publication of this standard IS 9299 (Part 3/Sec 1) shall be treated as withdrawn.

The text of IEC Standard has been approved as suitable for publication as an Indian Standard without deviations. Certain terminology and 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.