Download Free PDF. Urban Electric Transport on Rails — 3. Download PDF. A short summary of this paper. Director General al R. Transport Local Oradea, E-mail: dir. IDT I. As a on the contact lines related to the electric urban transport result of the studies and determinations carried out, in infrastructure on rails in Oradea city. Urban transports significantly contribute to environmental 2. At a given UA voltage, the EPLC already was concerned about the sustainable development energy losses on contact lines insulators are determined of urban transport systems with electric traction.
Above were examined constructive factors of Regarding these considerations, and that the damaged infrastructure related to urban electric transport, which insulators of the contact lines can cause serious accidents contribute to system energy losses, to the increasing of — with the help of a FLUKE B type mega- specific energy consumption in urban electric transport. Ohmmeter, we measured the insulation resistance of the Also, one has analyzed the energetic aspects of rectifying contact lines across all the tram supply sections in stations and the running routes related to the electric Oradea.
Control of Overovervoltages due to Switching a. Insertion of Resistors b. Phase Controlled Closing of circuit breakers c. Drainage of Trapped Charges before reclosing d.
Shunt Reactors e. Jose Jorge Fontalvo. Safithri Apriani. Alejandro Ramirez Benites. Criss T. David Levi. Santiago Morillo. Rogerio Lucena. Muhammad Majid Altaf. Simulation and Analysis of power system transients. Venkitachalam Krishnamohan. Mahmoud Moez. More From Chnv Rmrz. Chnv Rmrz. Georgadze Lauron Gonzaga. Manual and Mechanical Handling Hazards and Control pdf. Popular in Overhead Power Line. Pro Software. Partial discharge measurements should be performed as part of quality control procedures in the factory to qualify the specific apparatus for use with PEC supply; periodical monitoring while the motor is in service is also advisable.
Many different converters that cause different electric stress enhancement in insulation systems are available in the market. A severity index based on the supply waveform effect on insula- tion reliability should be quoted for a given PEC. Service aging of electrical apparatus, due to the combined effects of electric field, temperature, and mechanical stress, can significantly re- duce RPDIV relative to the value measured in the factory.
Thus safety coefficients comparing factory RPDIV measurements with the electric stress predicted in service are necessary to take into account the aging of insulation. Listing PD quantities such as amplitude and repetition rate, obtained through online PD measurements on electrical apparatus, can be useful in prevent- ing premature failures and optimizing maintenance scheduling.
In addition, the possibility of classifying PRPD patterns such as those described in this article could be useful in more accu- rately identifying the PD source and thus optimizing diagnosis and maintenance.
Busch, F. Pohlmann, and K. Montanari and D. Fabiani, A. Cavallini, and G. Fabiani and G. Stone, S. Campbell, and S. Espino-Cortes, E. Cherney, and S. Fitzgerald, C. Kingsley, and S. Umans, Electrical Machinery. Cavallini, D. Fabiani, and G. Tozzi, G. Montanari, D. Fabiani, and A. Kerkman, D.
Leggate, and G. Kaufhold, G. Borner, M. Eberhardt, and J. Okubo, N. Hayakawa, and G. Since he has been an asso- on partial discharge measurement and electrical insulation techniques for ciate professor at Bologna University.
Tanaka, Y. Ohki, M. Ochi, N. Harada, and T. Since he has been Dielectr. Ozaki, T. Imai, F. Sawa, T. Shimizu, and F. Italy, on January 7, Laurent, G. The interpretation of such measurements aims at extracting from the measured data … Expand.
Thick winding insulation required for partialdischarge-free electric machines used for aerospace applications is challenging for the design of thermal management system TMS.
This paper presents an … Expand. Prospects for increasing supply voltage and design of electrical field rotating machine windings supplied from power electronics.
View 3 excerpts, references background. The effect of inverter characteristics on partial discharge and life behavior of wire insulation. It has been demonstrated already that adjustable speed drives, and, in general, power electronics waveforms, can harm insulation systems of rotating machines, causing significant reduction of … Expand. Influence of PWM-type voltage waveforms on reliability of machine insulation system.
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