IEC 60618:1978

FOREWORD
PREFACE
Clause
1 Scope
2 Terms and definitions
  2.1 Inductive voltage divider
  2.2 Transfer ratio
  2.3 Fiducial value
  2.4 Transfer ratio error
  2.5 Input impedance
  2.6 Output impedance
  2.7 Influence quantity
  2.8 Variation
  2.9 Reference conditions
  2.10 Nominal range of use
  2.11 Limiting values of an influence quantity
  2.12 Circuit insulation voltage (nominal circuit voltage)
  2.13 Common mode voltage
  2.14 D.C series mode input current
  2.15 Distortion factor
  2.16 Electrostatic screen
  2.17 Leakage current screen
  2.18 Resolution
  2.19 Auxiliary equipment
  2.20 Accuracy
3 Classification
4 Limits of intrinsic error
  4.1 Permissible limits of intrinsic error
  4.2 Selectable ratios
5 Conditions for the determination of intrinsic errors
6 Permissible variations
  6.1 Limits of variations
  6.2 Conditions for the determination of the variations
  6.3 Variation due to d.c. series mode current
  6.4 Variation due to the influence of an externally
       produced magnetic field
7 Additional electrical and mechanical requirements
  7.1 Limiting values of input voltage
  7.2 Input voltage switching
  7.3 Voltage test and other safety requirements
  7.4 Insulation resistance test
  7.5 Limiting conditions for storage, transport and use
8 Information, markings and symbols
  8.1 Information
  8.2 Markings, symbols and their locations
  8.3 Documentation
  8.4 Example of the marking of an IVD
APPENDIX A - Transfer ratio and other performance
             characteristics
FIGURES

Covers 'precision autotransformers', 'decade transformer dividers','inductive dividers', 'ratio transformers', etc.Classification, limits of intrinsic error, conditions for thedetermination of intrinsic errors, permissible variations,additional electrical and mechanical requirements, documentation,markings and symbols.For measuring transformers intended to supply a burden, see IEC 60186.