One generator assembly consisting of the following components is delivered to the site: Bedplate Spring mounted stator Bearing pedestals Rotor with shrunk-on collector Stator inner enclosure
At the site, an outer enclosure is erected around the generator that includes coolers, current transformers, and neutral grounding equipment.
The SGen5-1000A air-cooled generator features: 165 – 350 MVA range (at 40 °C cold gas condition) World class efficiency with low maintenance design Multi-zone, indirectly cooled stator windings Roebelled stator windings with brazed solid end connections Radially ventilated stator core attached to bedplate Global Vacuum Pressure Impregnated (GVPI) stator core and stator winding Core suspended on two axial springs Radially ventilated and cooled rotor winding Two low pressure “push” fans mounted at each end of the rotor Weather and sound proof outer generator enclosure Coolers mounted on foundation beside bedplate and inside outer enclosure for a TEWAC (Totally Enclosed Water to Air-cooled) generator
Overhung collector and brush holders bedplate The stator bedplate is a heavy steel fabrication, which supports the stator core and windings, bearing pedestals, rotor assembly excitation casing, and the inner enclosure. The bedplate rests on leveling devices (fixators) affixed to the foundation and is secured with foundation bolts and axial and transverse anchors. Features for lifting and suitable jacking points for alignment to the turbine are also provided.