Woodward 505HT for Pelton Turbines 8200-1400, 8200-1401
This manual describes the installation and configuration procedures for the Woodward 2301E-HT digital
speed control for Francis turbines (p/n 8237-2046).
The 2301E-HT controls the speed and load of Francis hydraulic turbines with one gate analog output in
generator applications.
The control hardware includes:
• 1 Load Sensor
• 1 Actuator Driver
• 2 MPU Speed Sensors
• 1 Configurable Analog Output
• 2 Configurable Analog Inputs
• 8 Discrete (Switch) Inputs (3 inputs are configurable)
• 4 Configurable Discrete (Relay Driver) Outputs
• 2 Serial Ports (RS-232 and RS-422)
• 1 CAN Port
Refer to Manual 26691 (2300E Digital Control) for further hardware specifications of the 2301E-HT.
This chapter provides general information about how to install the 2301E-HT digital control for Francis
turbines. For detailed information about how to perform the product installation, see Manual 26691
(2300E Hardware Manual).
The 2301E-HT is a digital speed control designed for Francis hydraulic turbines with one analog gate
position output. It can be configured to perform several site-specific functions dependent upon the
application. This chapter describes the control’s I/O (input/output) and functions, including: start and stop
sequencing, different control modes, alarms, shutdowns, communications, and other functions.
Description of I/O
The 2301E-HT digital speed control has a wide selection of functions 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.
Control Inputs
Speed Inputs
Two speed inputs are available. The use of a magnetic pickup is necessary for this application.
The control can be configured to work with one or two (redundant) speed inputs. If configured for two
sensors the controller will always use the highest signal to control. If one of the speed inputs is lost the
control will keep running with just one signal and generate an alarm. If the second signal is lost then the
control will generate a trip and stop the turbine
Analog Inputs
Two analog inputs are available (4–20 mA).Their functions can be chosen from one of the below listed.
• Pond/Tail Level: This analog input is mandatory if pond/tail level control is desired.
• Speed Bias: This analog input comes from a synchronizer/load controller. If the synchronizer/load
controller doesn’t have an analog speed bias output, digital inputs in the 2301E-HT can alternatively
be used to perform this function (called Speed Bias Raise and Speed Bias Lower).
• Gate Position Feedback: This analog input provides information about gate actual position. This is
mandatory if an Integrating Gate Actuator is used. If a Proportional Gate Actuator is used, this input
can be used as well just for monitoring purposes.
• Remote Speed Reference: This analog input is used to provide a remote speed reference if droop
control is used (either actuator droop or kW droop).
• Gate Position Limiter: This analog input is used if it’s necessary for any reason to limit the gate
position to a certain value. If this gate limit is desired but an analog input is not available, there are
two digital inputs that can be used alternatively (gate limit raise and gate limit lower).
• Remote Baseload Reference: This analog input is used if the control is in Baseload mode and a
remote Baseload reference is enabled.
• Remote Level Reference: This analog input is used to provide a remote level reference, if level
control is used and remote level reference is enabled.
kW Input: This analog input is used to provide the actual generator load to the control. If this option is
used, the Current Transformer (CT) and Potential Transformer (PT) will be ignored by the control. If
there is no analog input programmed to this function the control will assume the CT and PT inputs as
generator load measurement