CSA C13 : 0

Technical Committee on Instrument Transformers
Preface
Foreword
Standard
1 Scope
2 Definitions and Symbols
   2.1 Definitions
   2.2 Symbols
3 General Requirements
   3.1 Reference Publications
   3.2 Service Conditions
   3.3 Frequency
   3.4 Highest Voltage for Equipment and Dielectric
        and Creepage Distances
   3.5 Radio Influence Voltage (RIV)
   3.6 Partial Discharge Test
   3.7 Effect of Air Density on Flashover Voltage
   3.8 Temperature Rise
   3.9 Tests
   3.10 Construction
4 Current Transformers
   4.1 Ratings
   4.2 Burdens
   4.3 Accuracy Classes for Metering
   4.4 Accuracy Classes for Protection
   4.5 Continuous Current Rating Factors (RF)
   4.6 Short-Time Current Ratings
   4.7 Secondary Winding Induced Voltages
   4.8 Rating Plate and Terminals
   4.9 Application Data
   4.10 Effect of Cooling Air on Permissible Loading
   4.11 Routine Accuracy Tests
5 Voltage Transformers
   5.1 Ratings
   5.2 Standard Burdens
   5.3 Accuracy Classes
   5.4 Thermal Burden Ratings
   5.5 Operation Above Rated Voltage
   5.6 Rating Plate and Application Data
   5.7 Terminals
   5.8 Short-Circuit Characteristics
   5.9 Induced Voltage Test
   5.10 Routine Accuracy Test
6 Phase Shifting Transformers
7 Tests
   7.1 General
   7.2 Accuracy
   7.3 Demagnetization of Current Transformers
   7.4 Impedance and Excitation Measurements
   7.5 Polarity
   7.6 Resistance Measurements
   7.7 Short-Time Characteristics
   7.8 Temperature Rise Tests
   7.9 Dielectric Tests
   7.10 Measurement of the Open Circuit Secondary
        Voltage of Current Transformers
   7.11 Partial Discharge Test
   7.12 Radio Influence Test
   7.13 Phase Shifting Transformer Test
Tables
Figures
Appendix A - Methods of Measurement and Calculation of
             Composite Error
Appendix B - Graphical Determination of Voltage
             Transformer Accuracy Characteristics
Appendix C - Bibliography
Appendix D - Calculation of Voltage Transformer Ratio
             and Phase Angle from Known Zero and Rated
             Burden Data
8 Supplementary Provisional Requirements for Protective
   Current
   Transformers for Transient Response
   8.1 General
   8.2 Definitions
   8.3 Values of Rated Resistive Burden (Rb)
   8.4 Accuracy Requirements
   8.5 Rated Symmetrical Short-Circuit Current Factor
        (Kssc) for Class TPS Current Transformers
   8.6 Remanence Factor
   8.7 Method of Specification
   8.8 Marking of Rating Plate
   8.9 Application Data
   8.10 Tolerances on Magnetizing Inductance (Class TPY)
   8.11 Tests and Calculations
   8.12 Test Methods
Tables
Figures
Appendix E - Applications Guide for Specifying Protective
             Current Transformers for Transient Performance

Refers to current transformers and instrument voltage, for the measurement or indication of currents or voltages, for revenue metering, supervision or protective purposes, in electric power supply systems.