GPC, PPU
Option O1, Water turbine control
DEIF A/S
Page 16 of 19
When the timer expires, the speed UP signal deactivates and the GPC/PPU awaits the running
feedback before it resumes regulating.
The UP signal is deactivated after a specific time to prevent overspeeding of the turbine.
The timer can be adjusted to zero (factory setting) if this function is not required.
Start sequence
The start sequence consists of 4 steps:
1. Deflector valve(s) closed feedback ON
2. Open control valve 1, synchronising
3. Breaker
closes
4. Power (and possibly power factor) control for parallel w. mains or frequency control for
island
Stop sequence
The stop sequence consists of three steps:
1. Ramp down generator to load 0 kW
2. Open
breaker
3. Close all control valve(s)
Shutdown sequence
The shutdown sequence consists of three steps:
1. Generator breaker trip
2. Jet deflector open (bypass water flow)
3. Shut control valves
Digital Input
The inputs can be configured in the PC utility software. The following function is special for
option O1.
Terminal
Input function
Input type
Const./Pulse
23, 24, 26, 27
Jet deflector
The timer setting must be found during the commissioning.
Pick-up input is only available when option M1 or M2 is selected.
