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1.1 This test method covers the detection and measurement of partial discharge (corona) pulses at the terminals of an insulation system under an applied test voltage, including the determination of partial discharge (corona) inception and extinction voltages as the test voltage is raised and lowered. The test method is also useful in determining quantities such as apparent charge and pulse repetition rate together with such integrated quantities as average current, quadratic rate and power. The test method is useful for test voltages ranging in frequency from zero (direct voltage) to approximately 2000 Hz.
1.2 The test method is directly applicable to a simple insulation system that can be represented as a two-terminal capacitor (1), (2).
1.3 The test method is also applicable to (distributed parameter) insulation systems such as high-voltage cable. Consideration must be given to attenuation and reflection phenomena in this type of system. Further information on distributed parameter systems will be found in Refs. (1), (2), (3), and (4).
1.4 The test method can be applied to multi-terminal insulation systems, but at some loss in accuracy, especially where the insulation of inductive windings is involved.
1.5 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Specific precaution statements are given in Sections 8 and 14.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
IEEE StandardsIEEE 1434-2005 Guide to the Measurement of Partial Discharges in Rotating Machinery IEEE 48 Standard Test Procedures and Requirements for High Voltage Alternating Current Cable Terminations IEEE C57 113-1991
D149 Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at Commercial Power Frequencies
D618 Practice for Conditioning Plastics for Testing
D2275 Test Method for Voltage Endurance of Solid Electrical Insulating Materials Subjected to Partial Discharges (Corona) on the Surface
D3382 Test Methods for Measurement of Energy and Integrated Charge Transfer Due to Partial Discharges (Corona) Using Bridge Techniques
ICS Number Code 29.080.30 (Insulation systems)
UNSPSC Code 32121500(Capacitors)
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ASTM D1868-93(1998), Standard Test Method for Detection and Measurement of Partial Discharge (Corona) Pulses in Evaluation of Insulation Systems (Withdrawn 2007), ASTM International, West Conshohocken, PA, 1998, www.astm.orgBack to Top