CSA C13 : 0
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
INSTRUMENT TRANSFORMERS
Hardcopy , PDF
09-01-2008
English
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
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.