IS/IEC 61557 : Part 8 : 2014 Electrical Safety in Low Voltage Distribution Systems up to 1 000 V a.c. and 1 500 V d.c. - Equipment for Testing, Measuring or Monitoring of Protective Measures - Part 8 Insulation Monitoring Devices for IT Systems

NATIONAL FOREWORD

This Indian Standard (Part 8) which is identical to IEC 61557-8 : 2014 'Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. - Equipment for testing, measuring or monitoring of protective measures - Part 8: Insulation monitoring devices for IT systems' issued by the International Electro technical Commission (IEC) was adopted by the Bureau of Indian Standards on the recommendation of the Measuring Equipment for Basic Electrical Quantities Sectional Committee and approval of the Electro technical Division Council.

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.