Science and Production Corporation “ELSIB” Public Joint-Stock Company has completed a manufacturing of rotor of turbogenerator TBM-500-2У3 for power unit 10 of Refta PP. The rotor of 12,6 m length and 60 t mass was shipped to the station on 8-axle railway carrier of platform type.
The tests of rotor have done on runaway-balancing stand “Schenck”. The main steps of tests: balancing of rotor, tests for mechanic strength, electric and high voltage tests. The tests for mechanic strength have done with a runaway up to 3600 rpm with an exposure 2 min. at a heating of rotor winding up to working temperature 80 °C.
On the tests at runaway-balancing stand, the entire further operation of electric machine depends since at this step it is checked a quality of manufacturing of rotor and the possible deviations are revealed.
The turbogenerator TBM-500 in a content of which the rotor will work is considered as really unique; it possesses a number of technical advantages comparing with other analogues. Its efficiency is 98,95 %. It became possible due to a water-oil cooling system at which the losses for ventilation reduce comparing with the machines in which as the cooling medium the hydrogen is used. The turbogenerator TBM-500 is equaled to the medium thermal power plant by its power.
The Refta PP (includes into SGC) is located in Sverdlovsk region in working village Reftinsky of Asbest town. For a whole history, ELSIB has supplied to this station 3 turbogenerators TBM-500 (units 8, 9 and 10), the first of which was commissioned in 1978.