Partial discharge. XXV. Calibration of PD measurements for motor and generator windings-why it can't be done
- 1 January 1998
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Electrical Insulation Magazine
- Vol. 14 (1), 9-12
- https://doi.org/10.1109/57.649908
Abstract
In most types of high voltage apparatus, a PD acceptance test is required. In contrast, the PD test is very rarely used as an acceptance test for new motor and generator windings. The closest that machine manufacturers come to a PD acceptance test is the power factor tip-up test (IEEE Standard 286), which is an indirect PD test. The tip-up test is sensitive to PD sources when testing individual coils/bars but is relatively insensitive when testing complete windings, due to the presence of stress relief coatings. The lack of a direct PD acceptance test fundamentally results from the inductive nature of a stator winding. This article discusses the reasons for the lack of an absolute PD measurement criteria for stator windings, after a discussion on measurement methods and the quantities used to measure PD activity.Keywords
This publication has 4 references indexed in Scilit:
- Investigation of Turn Insulation Failure Mechanisms in Large AC MotorsIEEE Transactions on Power Apparatus and Systems, 1984
- Application of Partial Discharge Testing to Hydro Generator MaintenanceIEEE Transactions on Power Apparatus and Systems, 1984
- Generator Insulation Diagnostic TestingIEEE Transactions on Power Apparatus and Systems, 1979
- Detection of Slot Discharges in High-Voltage Stator Windings During OperationTransactions of the American Institute of Electrical Engineers, 1951