Method of operating water-turbine or pump water-turbine
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United States of America Patent
Stats
-
Aug 28, 1984
Grant Date -
N/A
app pub date -
Nov 10, 1981
filing date -
Nov 19, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of operating a water-turbine or a pump water turbine in which, when the runner is idling for phase modification running or stand-by running, the main machine is tripped by means of a main machine tripping circuit when the flow rate of cooling water supplied to the seal portions of the runner is maintained below a predetermined limit for a predetermined period of time. The main machine tripping circuit is excited to become operative only after the pressure around the runner comes down to a level approximating the water pressure in the draft pipe.
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