IEEE Std ™). IEEE Recommended Practice for. Insulation Testing of AC Electric. Machinery ( V and Above). With High Direct. IEEE Std 95 () IEEE Recommended Practice for Insulation Testing of Large AC Rotating Machinery with High Direct Voltage. (This foreword is not a part of IEEE Std , Recommended Practice for Insulation In the Insulation Subcommittee of the IEEE Rotating Machinery .
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Topics Discussed in This Paper. On-line and off-line tests M.
Understanding water treeing mechanisms in the development of diagnostic test methods. Diagnostic tests Interpretation logic R. Detection of stator winding insulation failures: Uniform step, graded step, and ramped test methods. The most usual methodology is the finite element method, or linear regression.
In order to address this methodology, a calculation method was developed to determine temperature increases in the last stator package. Use of AC and DC hipot tests to assess stator winding insulation. Skip to search form Skip to main content. Dhirani, Electrical Insulation for Rotating Machines. Examples of stator winding partial discharges due to keee drives.
This last scenario was also useful to test extrapolation accuracy.
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From This Paper Figures, tables, and topics from this paper. References Publications referenced by this paper. At that point, the temperature value will be compared to with the values obtained using finite elements method and multivariate regression. This paper has 48 citations. The end region of a stator is the most sensitive part to overheating. Scientific Research An Academic Publisher.
Until recent revisions, the basic procedures and standards in use were written over 25 years ago. Stone Published in IEEE Transactions on Industry Applications IEEE standards and test procedures are widely used by motor and generator vendors and users to commission windings in new machines, as well as evaluate the condition of the winding insulation in operating machines.
Showing of 39 extracted citations. The calculation of magnetic fields, the evaluation of eddy-current losses and the determination of loss-derived temperature increases, are challenging problems requiring the use of simulation methods. World Journal of Engineering and TechnologyVol.
The mathematical model developed was based on an artificial intelligence technique, more specifically neural networks. Significance of defects found during high direct voltage ramp tests. High – voltage DC tests for evaluating stator winding insulation: Showing of 7 references. In that sense, it is important to pay close attention to overheating, which results from excessive system losses and cooling system inefficiency.
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BlanquezCarlos A. The method is applied to determine core-end temperature when power is uprated to Uniform stepgraded stepand ramped test methods.
Citations Publications citing this paper. Power uprates pose a threat to electrical generators due to possible parasite effects that can develop potential failure sources with catastrophic consequences in most cases.
Online technique for insulation assessment of induction motor stator windings under different load conditions Majid MalekpourB. Since the s, motor windings have encountered many changes in their design and manufacture.