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Additional resources for ANSI-IEEE 1010-1987 Guide for Control of Hydroelectric Power Plants
Inlet valves are desirable for each unit if one penstock is used for two or more turbines. Plants having intake gates or valves should have their controls interfaced with the unitÕs control system. The gates are normally closed for one of two purposesÑmaintenance or emergencyÑbut not during normal operation. An emergency can include a unit run-away due to such things as load rejection and failure of the wicket gates to close. It is critical that the intake be capable of closing under all ßow conditions.
27SV Converter sync voltage failure A 33 Thyristor cubicle door open P, A Trips static starter*, alarms. 33RS Phase reversing switch wrong position P, A Trips static starter*, alarms. 48 Start/stop sequence incomplete (time exceeded) P, A Trips static starter*, alarms. 49 Cooling oil high temp P, A Trips static starter*, alarms. 50G Starter ground fault P, A Trips static starter*, alarms. 51 Starter overcurrent P, A Trips static starter*, alarms. 52b Cooling system feeder breaker tripped P, A Trips static starter*, alarms.
N(ref) Speed reference indication I H-3 Typically derived from a potentiometer or synchro ganged to the motor drive. 65PM-LS Power reference motor drive limit switches C, I H-4 Adjustable limit switches are used to preposition the power reference prior to starting the unit and prior to transferring from generate mode to synchronous condenser mode. ÒEnd-of-travelÓ limit switches are used for illumination of lamps at remote raise/lower control switches or pushbuttons. P(ref) Power reference indication I H-4 Typically derived from a potentiometer or synchro ganged to the motor drive.