Woodward 505HT, Installation And Operation Manual

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Manual 35116 505HT for Pelton Turbines
Woodward 43
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Enable Remote Level: This input enables the remote level control. In this control mode an analog
input needs to be configured for Remote level. This control will work when the control is in level
control mode.
•
Overspeed Test Enable: This input enables the overspeed test. Discrete input closes to enable and
opens to disable the test.
•
Force Nozzle Rotation: This input force the nozzle rotation algorithm to trigger.
See Appendix F, Figure F-9 for a diagram of Nozzle Auto/Manual Demand and Figure F-5 for additional
detail on Droop Feedback.
Control Outputs
Actuator outputs
Two 4-20mA or 20-160mA actuator outputs are available for use. These outputs are defined to be used
as Nozzle 1 and Nozzle 2 demands and cannot be used for other functions.
The Actuator output 1 is dedicated to nozzle 1 demand and the actuator output 2 is dedicated to nozzle
2demand. If the turbine has more than 2 nozzles it is necessary to use analog outputs to the other(s)
nozzle(s). Front panel ESTOP button will shut down the actuators circuits 1 and 2, so if this is not desired
to the control, configure analog outputs to this function and ignore the actuators output. When an analog
output is configured to work as actuator 1 or 2, all the alarms and faults related to the actuator outputs will
be overridden.
Front panel ESTOP button will shut down the actuators circuits 1 and
2, so if this is not desired to the control, configure analog outputs to
this function. Some valves should remain with 4mA during the
shutdown, and these actuator outputs will not work for this case.
Analog outputs
Six analog outputs are available. All analog outputs are 4–20 mA. It is possible to configure the range of
each analog input, using the 505´s display.
The configurable analog outputs have the following options:
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Tachometer: This output is a mirror of the speed of the turbine, in percent.
•
Nozzle 1 Position to Nozzle 6 Position: These outputs represent the actual position of each nozzle,
in percent.
•
Nozzle Limit: This output is the actual nozzle limit value that the control is considering to control the
turbine.
•
Speed Adjustment:
•
Pond/Tail Level: This is the actual pond or tail level, depending on how the control is programmed.
•
Pond/Tail Level Setpoint: This is the actual pond or tail level setpoint, depending on how the control
is programmed.
•
Speed Bias: This is a mirror of the speed bias used by the control.
•
Generator Power: This output reflects the actual generator power that came from the Analog Input
programmed for generator power.
•
Nozzle 1 Actuator to Nozzle 6 Actuator: These outputs are used to control the nozzles (up to 6).
The actuator outputs 1 and 2 can also be used trough the actuator outputs, but remember the
actuator outputs will go to zero mA if the E-STOP is pressed and these analog outputs will go to 4mA.
Released