IEEE C57.13 2008

$60.13

IEEE Standard Requirements for Instrument Transformers

Published By	Publication Date	Number of Pages
IEEE	2008	94

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Description

Revision Standard – Active. 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 and interchangeability of equipment covered and to assist in the proper selection of such equipment. Safety precautions are also addressed. 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.

PDF Catalog

PDF Pages	PDF Title
1	IEEE Std C57.13-2008 Front Cover
3	Title Page
4	Abstract/Keywords
6	Introduction Notice to users Laws and regulations Copyrights
7	Updating of IEEE documents Errata Interpretations Patents
8	Participants
10	Contents
13	IMPORTANT NOTICE 1. Overview 1.1 Scope 1.2 Purpose
14	2. Normative references 3. Definitions
15	4. General requirements 4.1 Service conditions
16	4.2 Effect of air density on flashover voltage 4.3 Frequency
17	4.4 Effect of altitude on temperature rise and effect of ambient temperature on permissible loading 4.5 Basic impulse insulation levels, dielectric tests, and outdoor instrument transformer creepage distance and wet tests
20	4.6 Temperature rise
21	4.7 Tests
22	4.8 Construction
24	5. Accuracy classes for metering 5.1 Basis for accuracy classes
25	5.2 Expression of Transformer Correction Factor at 0.6 power factor (lagging) of meteredload 5.3 Standard accuracy classes 5.4 Limiting values of Ratio Correction Factor and phase angle for standard accuracy classes
27	6. Current transformers 6.1 Terms in which ratings shall be expressed 6.2 Standard burdens
28	6.3 Accuracy ratings for metering
30	6.4 Accuracy ratings for relaying
31	6.5 Continuous thermal current rating factors based on 30 °C average ambient air temperature 6.6 Short time current ratings
32	6.7 Secondary winding-induced voltages
33	6.8 Nameplates 6.9 Terminals 6.10 Application data
35	6.11 Routine accuracy tests 7. Voltage transformers 7.1 Terms in which ratings shall be expressed
41	7.2 Standard burdens
42	7.3 Accuracy ratings 7.4 Thermal burden ratings 7.5 Nameplates
43	7.6 Terminals 7.7 Short-circuit capability 7.8 Application data 7.9 Induced voltage test
44	7.10 Routine accuracy tests 8. Test code 8.1 Ratio and phase angle measurement and calculations
62	8.2 Demagnetization
64	8.3 Impedance and excitation measurements
69	8.4 Polarity
72	8.5 Resistance measurements
74	8.6 Short-time characteristics
78	8.7 Temperature rise tests
82	8.8 Dielectric tests
86	8.9 Measurement of open-circuit voltage of current transformers
88	8.10 Partial discharge measurement
92	Annex A (informative)Bibliography