Stator coil water system early alert hydrogen leakage monitor

Details Stator coil water system early alert hydrogen leakage monitor Stator coil water system early alert hydrogen leakage monitor

1989-11-22

1990-09-25

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 52, 310 54, 310 55, 165 111, 73 405R, H02K 900, H02K 924, G01M 308, F28F 0000

Patent

active

049595695

ABSTRACT:
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 to protect the system from an overly large or gross failure of the system. By continusouly 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.

REFERENCES:
patent: 2675493 (1954-04-01), Grobel
patent: 3122668 (1964-02-01), Cuny
patent: 4008755 (1977-02-01), Vandamme
patent: 4373379 (1983-02-01), Obara et al.
patent: 4440017 (1984-04-01), Barton et al.
patent: 4590793 (1986-05-01), Staats, Jr.
patent: 4753284 (1988-06-01), Krause et al.
patent: 4870393 (1989-09-01), Snuttjer et al.

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