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定价: 149元 / 折扣价: 127

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The speed-governing system consists of a speed-governor element which is sensitive to changes in rotational speed, or to changes in rotational speed and electric load, and other component elements required for controlling the fuel supplied to the engine. The speed-governing system, to meet the changes in power output as demanded by the load on the engine, meters the engine fuel supply in such a manner that speed tends to remain constant or to vary with the imposed load in a predetermined manner.

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The requirements in this standard apply to 60 Hz open-ventilated air-cooled cylindrical rotor synchronous generators rated 10,000 kVA and above. All requirements and definitions, except as specifically covered in this standard, shall be in accordance with ANSI C50.10-1977 and C50.13-1977.

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This standard describes the criteria for the application and testing of combustion turbine-generator units as Class 1E standby power supplies in nuclear power generating stations. Figure 1 shows the boundaries of systems and equipment included in the scope of this standard. Site testing is covered in Clause 7, and the boundaries for site testing are given in 1.1.2.

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