IEEE C57.13-1993

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IEEE Standard Requirements for Instrument Transformers

Published By	Publication Date	Number of Pages
IEEE	1993

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Description

Revision Standard – Superseded. Superseded by IEEE Std C57.13-2008. Electrical, dimensional, and mechanical characteristics are covered, taking into consideration certain safety features, for current and inductively coupled voltage transformers of types generally used in the measurement of electricity and the control of equipment associated with the generation, transmission, and distribution of alternating current. The aim is to provide a basis for performance, interchangeability, and safety of equipment covered, and to assist in the proper selection of such equipment. Accuracy classes for metering service are provided. The test code covers measurement and calculation of ratio and phase angle, demagnetization, impedance and excitation measurements, polarity determination, resistance measurements, short-time characteristics, temperature-rise tests, dielectric tests, and measurement of open-circuit voltage of current transformers. Interpretations are available at http://standards.ieee.org/reading/ieee/interp/C57.13-1993.html

PDF Catalog

PDF Pages	PDF Title
1	Title page
3	Introduction Participants
6	CONTENTS
9	1. Scope 2. References
10	3. Definitions
13	4. General requirements 4.1 Service conditions
14	4.2 Effect of air density on flashover voltage 4.3 Frequency 4.4 Effect of altitude on temperature rise and effect of ambient temperature on permissible loading
16	4.5 Basic impulse insulation levels, dielectric tests, and outdoor instrument transformer creepage distance on wet tests 4.6 Temperature rise 4.7 Tests
20	4.8 Construction
22	5. Accuracy classes for metering 5.1 Basis for accuracy classes 5.2 Expression of TCF at 0.6 power factor (lagging) of metered load 5.3 Standard accuracy classes
23	5.4 Limiting values of RCF and phase angle for standard accuracy classes
24	6. Current transformers 6.1 Terms in which ratings shall be expressed 6.2 Standard burdens
25	6.3 Accuracy ratings for metering
27	6.4 Accuracy ratings for relaying
28	6.5 Continuous thermal current rating factors based on 30°C average ambient air temperature 6.6 Short-time current ratings
29	6.7 Secondary winding induced voltages 6.8 Nameplates 6.9 Terminals 6.10 Application data
32	6.11 Routine accuracy tests 7. Voltage transformers 7.1 Terms in which ratings shall be expressed
38	7.2 Standard burdens 7.3 Accuracy ratings
39	7.4 Thermal burden ratings 7.5 Nameplates 7.6 Terminals 7.7 Short-circuit capability 7.8 Application data
40	7.9 Induced voltage test 7.10 Routine accuracy tests 8. Test code
41	8.1 Ratio and phase angle measurement and calculations
57	8.2 Demagnetization
58	8.3 Impedance and excitation measurements
62	8.4 Polarity
65	8.5 Resistance measurements
67	8.6 Short-time characteristics
70	8.7 Temperature rise tests
74	8.8 Dielectric tests
77	8.9 Measurement of open-circuit voltage of current transformers
79	9. Bibliography