IEC 61869-1:2007

FOREWORD
1 Scope
2 Normative references
3 Terms and definitions
   3.1 General definitions
   3.2 Definitions related to dielectric ratings
   3.3 Definitions related to current ratings
   3.4 Definitions related to accuracy
   3.5 Definitions related to other ratings
   3.6 Definitions related to gas insulation
   3.7 Index of abbreviations
4 Normal and special service conditions
   4.1 General
   4.2 Normal service conditions
   4.3 Special service conditions
   4.4 System earthing
5 Ratings
   5.1 General
   5.2 Highest voltage for equipment
   5.3 Rated insulation levels
   5.4 Rated frequency
   5.5 Rated output
   5.6 Rated accuracy class
6 Design and construction
   6.1 Requirements for liquids used in equipment
   6.2 Requirements for gases used in equipment
   6.3 Requirements for solid materials used in equipment
   6.4 Requirements for temperature rise of parts and
        components
   6.5 Requirements for earthing of equipment
   6.6 Requirements for the external insulation
   6.7 Mechanical requirements
   6.8 Multiple chopped impulse on primary terminals
   6.9 Internal arc fault protection requirements
   6.10 Degrees of protection by enclosures
   6.11 Electromagnetic Compatibility (EMC)
   6.12 Corrosion
   6.13 Markings
   6.14 Fire hazard
7 Tests
   7.1 General
   7.2 Type tests
   7.3 Routine tests
   7.4 Special tests
   7.5 Sample tests
8 Rules for transport, storage, erection, operation and
   maintenance
9 Safety
10 Influence of products on the natural environment
Annex A (normative) Identification of test specimen
Annex B (informative) Rules for transport, storage, erection,
                      operation and maintenance
Annex C (informative) Fire hazard
Annex D (informative) Sample test
Bibliography

This International Standard is applicable to newly manufactured instrument transformers with analogue or digital output for use with electrical measuring instruments or electrical protective devices having rated frequencies from 15 Hz to 100 Hz. TC 38 decided to restructure the whole set of stand-alone Standards in the IEC 60044 series and transform it into a new set of standards composed of general requirements documents and specific requirements documents. This Standard is the first issue of this new series and can be regarded as a Product Family standard. It contains the general requirements for instrument transformers and shall be read in conjunction with the relevant specific requirements standard for the instrument transformer concerned.