H - Electricity – 02 – K
Patent
H - Electricity
02
K
340/145, 310/23
H02K 9/10 (2006.01) H02K 9/24 (2006.01)
Patent
CA 2030462
55,560 ABSTRACT OF THE DISCLOSURE An apparatus for monitoring hydrogen leakage from a generator frame into the stator coil water cooling system. The monitor is designed to alert the operator should leakage exceed a rate of twenty cubic feet per day (20 cfd). A pressure relief valve set at four (4) psig and orifice are provided, along with a second relief valve having a higher setpoint than the first, such that pressure will increase in the holding tank if leakage exceeds 20 cfd setpoint of the orifice. A high pressure alarm, set at a level higher than the first relief valve but less than that of the second, will then sound to alert the operator if such a condition exists. A bypass valve is also added to protect the system from an overly large or gross failure of the system. by continuously monitoring a relatively small steady state leakage rate, the operator can be aware of a minor problem which can be corrected at a scheduled maintenance outage, before a gross failure of the system, requiring a costly shutdown of the turbine-generator, would otherwise occur.
Rasinski Michael Joseph
Snuttjer Owen Russel
Bereskin & Parr
Westinghouse Electric Corporation
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