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Extra resources for ANSI-IEEE 1010-1987 Guide for Control of Hydroelectric Power Plants

Example text

73DTH Draft tube water level high A Initiated if draft tube water level increases excessively during the synchronous condenser mode. Indicative of problems in air system or excessive wicket gate leakage. 71DTEH Draft tube water level extremely high C, A Transfers unit from synchronous condenser to generate mode. 48SC Synchronous condenser incomplete sequence C, A Transfers unit from synchronous condenser mode to generate mode if draft tube water level is not fully depressed within a set time from initiation of the sequence.

The sequencing of these valves for initial blow-down and make-up is totally automatic. This operation usually requires a minimum of three level set points: Level 1ÑSet to sense that the water level is below the runner for motoring operation (nominal depressed level) (both large and small valves are deenergized at this level). Level 2ÑSet to sense that the water level is below the runner for motoring operation but is above the nominal level and, therefore, make-up air needs to be added. ) Level 3ÑSet to sense when water level is above Level 2, but still below the runner.

63ABS Generator air brake supply pressure low A H-16 33WGL Wicket gate automatic lock applied/ released C, I H-15 Indicates status of the gate lock (applied on shutdown when gates at 0%). 65WGLF Wicket gate automatic lock failure A H-15 Indicates that the gate lock has not been fully applied on shutdown. 65M/LS Manual control indication I H-11 Provides remote indication that the governor is in manual control at the governor cubicle. Copyright © 1988 IEEE All Rights Reserved NOTES 29 IEEE Std 1010-1987 IEEE GUIDE FOR CONTROL OF SIGNAL DESCRIPTION TYPE ORIGINATING DEVICE AT GOVERNOR (REF.

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ANSI-IEEE 1010-1987 Guide for Control of Hydroelectric Power Plants


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