| 摘要 |
<p>An electrohydraulic emergency trip system for a turbine power plant to close rapidly the steam inlet valves to the turbine is disclosed. The hydraulic portion of the system for decreasing the trip fluid pressure to the steam inlet valves is governed by a first and second electrically operable trip valve means, both of which are operated to trip the turbine. Each of the trip valve means is controlled by an independent voltage source. A contingency detection means, which operates in response to a trip contingency, is energized by a third voltage source that is generated by one or both of the first and second voltage sources. The system provides for ground fault detection upon testing for a trip contingency.</p> |
