Results 171 to 180 of about 298,299 (227)
A Wide-Bandwidth Inexpensive Current Sensor Based on the Signal Fusion of Tunneling Magnetoresistance and a Current Transformer. [PDF]
Sensors (Basel)Wang K +6 more
europepmc +1 more source
Flight power muscles have a coordinated, causal role in controlling hawkmoth pitch turns.
J Exp BiolWood LJ, Ortega J, Sponberg S.
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Lightning Impulse Ageing of HDPE [PDF]
, 2009 This work is concerned with the hypothesis that lightning impulses can lead to accelerated ageing of extruded polymeric cables. The behaviour of an insulation material when suffering lightning impulses is different from that for DC or power frequency over-voltages. Shaped HDPE material samples have been manufactured using a mould tool. The samples then
Dao, N L, Lewin, P L, Swingler, S G
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IEEE Transactions on Dielectrics and Electrical Insulation, 2009
To lower the lightning impulse withstand voltage of gas insulated switchgear (GIS) while maintaining the high reliability of its insulation performance, it is important to define in an organized way the insulation characteristics for non-standard lightning impulse voltage waveforms that represent actual surge waveforms in the field and compare them ...
Genyo Ueta
exaly +2 more sources
To lower the lightning impulse withstand voltage of gas insulated switchgear (GIS) while maintaining the high reliability of its insulation performance, it is important to define in an organized way the insulation characteristics for non-standard lightning impulse voltage waveforms that represent actual surge waveforms in the field and compare them ...
Genyo Ueta
exaly +2 more sources
IEEE Transactions on Dielectrics and Electrical Insulation, 2008
To lower the insulation specifications (specifically, the lightning impulse withstand voltage) of oil-immersed transformers and thus reduce equipment cost while maintaining high insulation reliability, it is required to identify the insulation characteristics under non-standard lightning impulse waveforms that are associated with actual surge waveforms
Jun Takami
exaly +2 more sources
To lower the insulation specifications (specifically, the lightning impulse withstand voltage) of oil-immersed transformers and thus reduce equipment cost while maintaining high insulation reliability, it is required to identify the insulation characteristics under non-standard lightning impulse waveforms that are associated with actual surge waveforms
Jun Takami
exaly +2 more sources
Lightning Impulse Ageing of HV Cable Insulation [PDF]
, 2009 Lightning impulses can lead to accelerated ageing of extruded cables. Electrical behaviour of a dielectric material when experiencing a lightning impulse is different to that for DC or power frequency applied voltages. Pre-designed shaped HDPE material samples have been manufactured using a mould tool. The samples then have been electrically aged using
Dao, N L, Lewin, P L, Swingler, S G
core +2 more sources
High-Accuracy Comparison of Lightning and Switching Impulse Calibrators
IEEE Transactions on Instrumentation and Measurement, 2007This paper summarizes the results of a comparison on two calculable impulse voltage calibrators and one commercial calibrator between Helsinki University of Technology, Finland (MIKES-TKK), Nippon Institute of Technology, Japan (NIT), and Physikalisch-Technische Bundesanstalt, Germany (PTB).
Wakimoto, Takayuki +7 more
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Robust evaluation procedure for lightning impulses
Proceedings of the 7th International Conference on Properties and Applications of Dielectric Materials (Cat. No.03CH37417), 2004The existing recommendation for high voltage tests, IEC Publication 60060, is ambiguous in the evaluation of the impulse test voltage, when oscillations or overshoot are superimposed on the peak of the smooth, double exponential waveshape. Particularly impulse tests on transformers may be critical due to the high stress on the insulation during the ...
K. Hackemack, E. Gockenbach
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Virtual Instrument for Lightning Impulse Tests
IEEE Transactions on Power Delivery, 2007We propose an objective formulation of the impulse analysis problem from a signal analysis viewpoint. The winding response is quintessentially that of a deterministic network to a finite energy signal, with breakdown and partial discharge being inherently nonlinear events.
A. Palani, V. Jayashankar
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Lightning Impulse Voltage Evaluation
2017This research studied and developed software for lightning impulse voltage parameters evaluation. Full lightning impulse voltage of 9 cases in TDG program had been used as references for software tested. This software created 2 types of voltage waveform which are mean curve and approximate real curve. Kalman Filter had been used for mean curve.
Nopphadon Khodpun, Krisada Vilailak
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