PUMP GP-TRANSMISSION 7S8660 - Caterpillar

Chapter 1. General Information
Description
The 2301A Speed Control controls the speed or load of diesel or gas engines, or steam or gas turbines. These power sources are referred to as "prime movers" throughout this manual.The control is housed in a sheet-metal chassis and consists of a single circuit board. All potentiometer are accessible from the front of the chassis.The 2301A Speed Control provides control in the isochronous mode with droop available through and externally wired potentiometer.The isochronous mode is used for constant speed of the controlled prime mover as long as it is able to provide the load. Isochronous is also used when load sharing with Woodward load sensor.External droop is used for speed control as a function of load when a prime mover is operating on an infinite bus or when two or more prime movers are in parallel operation.The 2301A system for a prime mover includes:* A 2301A electronic speed control,* An external power source,* A speed-sensing device (MPU), and* A proportional actuator to position the fuel- or steam-metering device.Part Number Table Applications
2301A Speed Controls are available for forward- or reverse-acting applications for use with single or tandem actuators. High voltage models accept 88 to 132 Vac or 90 to 150 Vdc. Low voltage models accept 10 to 40 Vdc supply.See the Part Number Table above for a listing of 2301A Speed Controls an applications.Speed range is set on an internal dip switch, available inside the steel cover of the control. Speeds are set according to the sensor output frequency. The relationship between the prime mover speed and sensor output frequency is expressed in the formula: Sensor Frequency in Hz equals the number of teeth on the speed-sensing gear times the revolutions per minute of the sensing gear, times the ratio of the engine speed to the sensing gear speed, divided by 60.Reverse Acting
Most reversing 2301A Speed Controls will operate Woodward EGB governor/actuators. In reverse-acting systems, the actuator calls for more fuel when the actuator current decreases. Complete loss of signal to the actuator will drive the actuator to full fuel. This allows a backup mechanical ball head governor to take control rather than shutdown the prime mover as would a direct-acting system.External wiring connections for reverse-acting controls are identical to those for direct-acting controls. However, changes must be made to the printed circuit board should a control need to operate the opposite type of actuator. Contact Woodward should it be necessary to change the type of 2301A Speed Control. Changing the supply voltage rating requires exchanging the unit for the properly rated control.References
The following Woodward publications contain additional product or installation information on speed controls and related components. These publications are available on the Woodward website (www.woodward.com). Declaration of Incorporation
In accordance with the EMC Directive 89/336/EEC and its amendments, this controlling device, manufactured by the Woodward Governor Company, is applied solely as a component to be incorporated into an engine prime mover system. Woodward declares that this controlling device complies with the requirements of EN50081-2 and