| 摘要 |
Method and apparatus for preparing stators of a fluid cooled generator for ground (megger) and other tests. The method of automatically cycling into stator cooling coils gradually incremented pressures of super-desiccated air followed by subsequent rapid blowdown literally urges pockets of moisture out of the coils, freeing them by staccotic erosion or deterioration, as droplets and vapor. The process is carried out through the use of a palletized vacuum subsystem and conditioned air treatment/pressurization subsystem which includes a panel containing relay control logic for semi-automatic/automatic conduct of the testing protocol and including essentially relay logic, an air compressor with necessary valving, air filtration and drying apparatus, a receiver which affords storage of the treated, dried air and a sequencing valve with adjunct equipment for connection of the receiver output to the stator-under-test. Also included is an off-pallet valve of the butterfly type which functions as the blowdown sequencing valve and is fixed to the outlet portion of the stator network which is undergoing purge/test. |
