HYDROGENERATORS
8Pages

G_773/09_Ansaldo Turbogenerators 09/07/09_AW:Prodotti Ansaldo table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:22.00pt "Franklin Gothic Medium", sans-serif; }

G_773/09_Ansaldo Turbogenerators 09/07/09_AW:Prodotti Ansaldo table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:10.00pt "Franklin Gothic Medium", sans-serif; } .font1 { font:16.00pt "Franklin Gothic Medium", sans-serif; } .font2 { font:20.00pt "Franklin Gothic Medium", sans-serif; } Hydrogenerators Hydrogenerators have an extremely wide range of rota-tional speed depending on individual site condition. Due to this range (usually 50 - 1200 rpm), the construction configuration of the shaft and bearings, diameter and structure of the rotor, have a several...

G_773/09_Ansaldo Turbogenerators 09/07/09_AW:Prodotti Ansaldo table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:10.00pt "Franklin Gothic Medium", sans-serif; } .font1 { font:16.00pt "Franklin Gothic Medium", sans-serif; } Reliability Design features and manufacture Ansaldo Energia hydrogenerators are self-ventilated in an open or closed circuit with air to water coolers with indirectly cooled stator and rotor winding. The stator comprises the frame, the stacked stator core and the winding. According to transportation and erection limits, the stator can be...

G_773/09_Ansaldo Turbogenerators 09/07/09_AW:Prodotti Ansaldo table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:10.00pt "Franklin Gothic Medium", sans-serif; } In low speed hydrogenerators the rotor comprises the poles, the laminated rotor rim, the welded spider and the shaft. Both through shaft and stub shaft solutions are available. The laminated rotor rim consists of segments assem-bled on site at the plant, thus overcoming any transport problems. Each segment is made of punched steel plate with well- The most frequent configuration of rotor for high speed...

G_773/09_Ansaldo Turbogenerators 09/07/09_AW:Prodotti Ansaldo table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:10.00pt "Franklin Gothic Medium", sans-serif; } A typical feature of high speed machines is the trape-zoidal pole body, which has inclined longitudinal sides to allow the corresponding coil bar centre-line to be po-sitioned at a right angle to the rotor radius. This configuration, used in case of high mechanical stresses, may be the only option open for designers to solve problems caused by centrifugal forces acting on the rotor winding. The poles are...

G_773/09_Ansaldo Turbogenerators 09/07/09_AW:Prodotti Ansaldo table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:10.00pt "Franklin Gothic Medium", sans-serif; } .font1 { font:16.00pt "Franklin Gothic Medium", sans-serif; } .font2 { font:22.00pt "Franklin Gothic Medium", sans-serif; } Testing xcitation system Both fully static (standard) and brushless excitation arrangements are available. The fully static excitation system comprises an excitation power transformer, a power converter with controls and protections and a static circuit breaker. The brushless...

G_773/09_Ansaldo Turbogenerators 09/07/09_AW:Prodotti Ansaldo table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:10.00pt "Franklin Gothic Medium", sans-serif; } .font1 { font:16.00pt "Franklin Gothic Medium", sans-serif; } mblv and transport Start up and after sales services Ansaldo Energia can assembly machinery both at its production facilities and on site according to transportation limits and customer requirements. Laminated rotor rim is nearly always assembled on site. Ansaldo Energia can meet all customer requirements in the hydrogenerator field, supplying:...

G_773/09_Ansaldo Turbogenerators 09/07/09_AW:Prodotti Ansaldo table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:4.00pt "Arial", sans-serif; } .font1 { font:4.00pt "Franklin Gothic Medium", sans-serif; } .font2 { font:5.00pt "Franklin Gothic Medium", sans-serif; } .font3 { font:7.00pt "Franklin Gothic Medium", sans-serif; } .font4 { font:8.00pt "Franklin Gothic Medium", sans-serif; } .font5 { font:12.00pt "Franklin Gothic Medium", sans-serif; } .font6 { font:27.00pt "Franklin Gothic Medium", sans-serif; } .font7 { font:5.00pt "Georgia", serif; } .font8 {...