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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Until recent revisions, the basic procedures and standards in use were written over 25 years ago.
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. 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.
Online technique for insulation assessment of induction motor stator windings under different load conditions Majid MalekpourB. 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. Scientific Research An Academic Publisher. BlanquezCarlos A.
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The most usual methodology is the finite element method, or linear regression. The end region of a stator is the most sensitive part to overheating. 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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Detection of stator winding insulation failures: Significance of defects found during high direct voltage ramp tests. References Publications referenced by this paper. Uniform step, graded step, and ramped test methods. Diagnostic tests Interpretation logic R.
On-line and off-line tests M. Examples of stator winding partial discharges due to inverter drives. This paper has 48 citations.
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Understanding water treeing mechanisms in the development of diagnostic test methods. Citations Publications citing this paper.
Showing of 7 references. World Journal of Engineering and TechnologyVol. In order to address this methodology, a calculation method was developed to determine temperature increases in the last stator package.
From This Paper Figures, tables, and topics from this paper. Since the s, motor windings have encountered many changes in their design and manufacture. Showing of 39 extracted citations. The mathematical model developed was based on an artificial intelligence technique, more specifically neural networks.
This last scenario was also useful to test extrapolation accuracy.