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Power supply and electrical equipment
Evaluating the effectiveness of the introduction of multi-function booster transformer to boost the voltage to the traction network
Kosarev A., Serbinenko D., Alekseenko M.The paper proposed a method for evaluating the effectiveness of the introduction of multi-function booster transformer to boost the voltage to the traction AC networks. It is shown that the compensating installation connected to the multi-back booster transformer winding, performs the role of regulated mainly transverse and longitudinal partial compensation.
Keywords: system of traction power supply, multifunction booster transformer, electric, electromagnetic processes.New arrangement for diagnostics of the main insulation transformers 6-10 kv of the direct electric supply system of railways
Serebryakov A., Semyenov D.It has been suggested the patented arrangement for diagnostics of a condition of the main insulation of a high-voltage electric equipment on a pressure of the self-category and a returnable pressure. Objective of creation of a described arrangement is to define the remained resource of electric equipment and to not admit sudden breakdowns of electric isolation while in service. The quality monitoring of insulation is put in a basis of an arrangement of absorption characteristics, in particular, on a pressure of the self-category and a returnable pressure. It is shown, that by results of measurements reduction of a pressure of the self-category for distributive transformers averages 30 V for a year. The created arrangement allows predicting more precisely the remained resource of the main isolation of distributive transformers.
Keywords: diagnostics of high-voltage insulation, a charge of absorption, a current of absorption, a pressure of the self-category, a returnable pressure constants of time of the self-category, wear.Аnalysis of spice-time structure of stressed state of adfreezed coil under action of quasi point sources of strength
Kim K., Shpilev M.The using of the periodic system sources of electrohydropulse force allows to create the mechanical stresses in the coil conglomerate which exceed its ultimate stress. The arise forces don’t lead to the destruction of the walls of the gondola.
Keywords: adfreezed coil, gondola, electrohydropulse effect, loosening, mechanical stress.