The detection of partial discharges occurring in the insulation of dry-type transformers or their components and the measurement of the associated apparent charge at the terminals when the alternating test voltage is applied are covered. The wideband method is used. The detection system and calibrator characteristics are described, and the test procedures are established.
Working Group Details
Recommended Practice for the Detection of Partial Discharge and the Measurement of Apparent Charge in Dry-Type Transformers
This recommended practice describes the test procedure for the detection and measurement by the wide-band apparent charge method of partial discharges (PDs) occurring in dry-type transformers during dielectric tests, where applicable.