Method of operating water-turbine or pump water-turbine

Details Method of operating water-turbine or pump water-turbine Method of operating water-turbine or pump water-turbine

1981-11-10

1984-08-28

Powell, Jr., Everette A.

Rotary kinetic fluid motors or pumps

Method of operation

415 26, 415180, 415500, F03B 2106, F03B 310

Patent

active

044681674

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.

REFERENCES:
patent: 3236499 (1966-02-01), Chatfield et al.
patent: 3539270 (1970-11-01), Derrickson
patent: 3574473 (1971-04-01), Gaffal
patent: 3923417 (1975-12-01), Swiecicki
patent: 4047831 (1977-09-01), Mayo et al.
patent: 4286919 (1981-09-01), Yamaguchi
patent: 4295781 (1981-10-01), Ogiwara et al.

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