Woodward 505HT, Инструкция по установке и эксплуатации

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Manual 35116 505HT for Pelton Turbines
Woodward 41
Chapter 3.
505HT Control Description
Description of IO
The 505HT Control has a wide selection of functions to choose from a fixed amount of I/O (inputs and
outputs). The control can be configured in the field to use the I/O to best fit the specific application. During
the initial setup of the control, the functions that are needed for the specific application are selected and
the necessary I/O points are assigned accordingly. The control monitors the configuration and if there is
any inconsistence the control will generate an alarm and show to the operator what is wrong.
Control Inputs
Speed Input
Two speed inputs that can be configured for PT interface, MPU or Proximity probe are available.
If two speed probes are being used (MPU or Proximity) the highest signal will be considered to be
controlled by the 505HT.
If one of them is being used as PT interface this signal will be considered only when the generator
breaker is closed. While the breaker is opened only the speed probe will be sensed by the control.
Analog Inputs
There are eight configurable analog inputs available on the 505 hardware, each of which can be
configured as one of the following input functions:
•
Not Used: choose this option if this analog input won’t be used on this application
•
Pond/Tail Level: this analog input is mandatory if pond/tail level control is desired. If level control is
selected to be pond control than this input must be the pond level status. If level control is selected to
be tail control than this input must be the tail level status.
•
Generator Power: this analog input is used to express the generator load. This input is mandatory if
load droop or baseload mode is desired.
•
Speed Bias: this analog input comes from a synchronizer/load controller. If the synchronizer/load
controller does not have an analog speed bias output there can be used alternatively digital inputs in
the Control to perform this function (called Speed Bias Raise and Speed Bias Lower).
•
Remote Speed Reference: this analog input is used to provide remote speed reference, when speed
remote control is enabled.
•
Nozzle Position Limiter: this analog input is used when it is necessary for any reason to limit the
Nozzle position to a certain value. If this nozzle limit is desired but an analog input is not available
there are two digital inputs there can be used alternatively (nozzle limit raise and nozzle limit lower).
This a values limits all nozzles at the same time.
•
Remote Baseload reference: this analog input is used if the control is in Baseload mode and a
remote Baseload reference is needed.
•
Remote Level reference: this analog input is used if the control is in pond/tail level control mode and
a remote pond/tail level reference is needed. The value will be Pond or tail status according to the
control mode used.
•
Nozzle x Position Feedback: this analog input provides information about nozzle actual position
(where x is up to 6 nozzles). This is mandatory if Integrating Actuators are used. If Proportional
Actuators are used this input can be used as well just for monitoring purposes.
Discrete Inputs
Twenty contact inputs are available. The first five inputs are dedicated for Run/Stop (DI-1), Raise
Speed/load (DI-2), Lower Speed/Load (DI-3), Breaker Closed (DI-4) and Emergency Shutdown (DI-5).
The rest of the additional contact inputs are available for configuration to function as various controller
discrete input functions as listed below.
Released