Term 3.txt

• Penstock is full
• Exciter CB closes
• Brakes release
• Cooling water valve opens
• Lift pump starts
• Gate Lock Solenoid and Governor Shut Down Solenoid will pick up
• Wicket Gates open to breakaway position (30-40%)
• No-Load Speed Solenoid picks up (changing gate limit to 15%)
• Lift Pump shuts down

To control the generators terminal voltage by regulating the strength of the magnetic field on the rotor

To control the speed of the generator by regulating the flow of water

To support the weight of the rotor, shaft and turbine

To keep the shaft aligned to prevent rotor stator contact

To apply high pressure oil to the thrust bearing on start up and shut down

To open in case of a fault in the exciter circuit

When a rapid pressure change in liquid causes empty cavities to be created and quick implode

To ensure seals stay lubricated when the unit is not in use