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IEEE 436 1991

$61.75

IEEE Guide for Making Corona (Partial Discharge) Measurements on Electronics Transformers

Published By Publication Date Number of Pages
IEEE 1991 16
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Revision Standard – Active. A uniform procedure for making corona (partial discharge) measurements by electrical means on electronic transformers is presented. Methods of applying voltage stress, the use of a sine-wave voltage to simulated dc and ac combinations, the types and limitations of voltage stresses encountered, and the acceptable limits of discharge pulse energy are included. Recommended test conditions and the need for negotiation of special tests are discussed. Test apparatus and calibration are described. The aim is to establish a common ground of understanding between transformer and systems design engineers and transformer manufacturers in the development of service and performance requirements.

PDF Catalog

PDF Pages PDF Title
6 1 Scope
2 Purpose
3 References
4 Definitions
7 5 Test Conditions
Application of This Guide
Conditions for Acceptable Corona Tests
Frequencies at Which Corona Measurements May Be Performed
Effects of Voids in Solid Insulation
Corona Discharge Pulse Rise Time
5.2.4 Circuit Response
8 5.3 Signal-to-Noise Ratio
Discrimination Device Sensitivity
6 Apparatus
6.1 Test-Voltage Supply
6.1.1 Self-Excitation
6.2 Coupling Capacitor
6.3 Coupling Impedance
6.4 Corona Detector
9 Fig 1 Typical Circuit for Corona Measurement Circuit
Fig 2 Typical Circuit for Corona Measurement Circuit
10 6.4.1 Amplifier
6.4.2 Signal Readout Instrument(s1
Circuit Modifications for Self-Excitation
Parallel-T RC Filter Network
11 Calibration Pulse Generator
Calibration Coupling Capacitor
6.7 Control Metering
7 Calibration
7.1 Deflection Sensitivity
When Calibration Is Performed
7.3 Calibration Technique
Peak-to-Peak Voltmeter Circuit
12 Calculating Detection Sensitivity
8 Test Method
8.1 Group
8.2 Group I1
8.3 Group I11
9 Test Requirements
9.1 Ambient Conditions
9.2 Calibration Sensitivity
13 9.3 Test Voltage
DC Plus AC Test Voltage
Rate of Application
Duration of Tests
10 Bibliography
14 Appendix A Preconditioning for Determination of CIV
15 Appendix B The Magnitude and Energy of Discharges
16 Suggested Specification Requirements
IEEE 436 1991
$61.75