Manual 85018V1
505E Digital Governor
Woodward
i
Contents
W
ARNINGS AND
N
OTICES
...........................................................................
VI
E
LECTROSTATIC
D
ISCHARGE
A
WARENESS
.................................................
VII
R
EGULATORY
C
OMPLIANCE
......................................................................
VIII
C
HAPTER
1.
G
ENERAL
I
NFORMATION
........................................................... 1
Introduction ............................................................................................................. 1
General Description ................................................................................................ 3
505E Inputs and Outputs ........................................................................................ 4
Control Overview .................................................................................................... 8
Speed Control ....................................................................................................... 10
Auxiliary Control ................................................................................................... 11
Load Sharing Input ............................................................................................... 12
Cascade Control ................................................................................................... 12
Extraction/Admission Control ............................................................................... 13
Ratio/Limiter ......................................................................................................... 13
HP and LP Valve Limiters ..................................................................................... 14
Starting Features .................................................................................................. 15
Keypad and Display .............................................................................................. 21
Watchdog Timer/CPU Fault Control ..................................................................... 23
C
HAPTER
2.
I
NSTALLATION
P
ROCEDURES
.................................................. 24
Introduction ........................................................................................................... 24
Mechanical Data and Hardware Installation ......................................................... 24
C
HAPTER
3.
505E
C
ONTROL
D
ESCRIPTION
................................................ 42
Introduction ........................................................................................................... 42
Ratio/Limiter Configurations ................................................................................. 42
Speed vs. Extr/Adm Priority .................................................................................. 49
Turbine Start ......................................................................................................... 51
Turbine Start Modes ............................................................................................. 52
Critical Speed Avoidance ..................................................................................... 55
Idle/Rated ............................................................................................................. 56
Automatic Start Sequence .................................................................................... 58
No Idle Programmed ............................................................................................ 60
Speed Control Overview ....................................................................................... 60
Speed PID Operational Modes ............................................................................. 61
Synchronization .................................................................................................... 70
Extraction and/or Admission Turbine Control ....................................................... 73
Extraction Control ................................................................................................. 75
ADMISSION or EXTR/ADM Control ..................................................................... 76
Remote Extr/Adm Setpoint ................................................................................... 79
Cascade Control ................................................................................................... 81
Remote Cascade Setpoint.................................................................................... 85
Auxiliary Control ................................................................................................... 87
Valve Limiters ....................................................................................................... 92
Emergency Shutdown .......................................................................................... 94
Controlled Shutdown ............................................................................................ 94
Overspeed Test Function ..................................................................................... 95
Local / Remote Function ....................................................................................... 96
Function Keys ....................................................................................................... 97
Relays ................................................................................................................... 98
