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2 Electrical Tests. The larger generators (above 5000 kVA) usually receive only winding resistance measurements and dielectric tests a t the factory, and any additional testing 5Skate is the lateral random movement of a shaft superimposed on the periodic runout. This movement may be up to the full clearance of the bearing and is generally not considered significant in a n analysis of shaft motion. 35 a IEEE Std 1095-1989 THIS PAGE WAS BLANK IN THE ORIGINAL THIS PAGE WAS BLANK IN THE ORIGINAL IEEE Power Engineering Training Programs The IEEE sponsors training programs on the Color Books and other power engineering standards throughout the year.

Since the machine is stationary, IEEE Std 1095-1989 GENERATORhfOTORS FOR HYDROELECTRIC APPLICATIONS stalling the rotor. The winding should be in good condition and the tests not applied when the insulation resistance is low because of dirt o r moisture. 10-1977 [21. 5-1955 [ll, and the test procedure should be in accordance with ANSIAEEE Std 113-1985[41. Due to the high voltages used, dielectric tests should be conducted only by experienced personnel, and adequate safety precautions should be taken t o avoid injury t o personnel a n d damage t o property.

To clean the pipes, oil should be circulated through them for several hours. The oil leaving the pipes should bypass the reservoir and should be filtered to remove dirt. The reservoir itself should be filled with oil and drained, several times if necessary, t o remove all traces of dirt. Finally, it should be filled with clean filtered oil. It is recommended that the lubricating oil used be in accordance with the generator manufacturer’s specifications. Oils from different producers should not be mixed without the approval of the producers.

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1095-1989 (R IEEE Guide for Installation of Vertical Generators and Generator. Motors for Hydroelectric Applications


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