IEEE Recommended Practice for the Detection of Partial Discharge and the Measurement of Apparent Charge in Dry -Type Transformers

IEEE Std C57.124-1991 covers the detection of partial discharges occurring in the insulation of dry-type transformers of their components and the measurement of the associated apparent charge at the terminals when an alternating test voltage is applied. The wideband method is used. The detection system and calibrator characteristics are described, and the test procedure is established.<>