8273-140  2301D and 2301D-EC Digital Load Sharing

The Woodward 2301D controls load sharing and speed of generators driven by diesel or gaseous engines. (These power sources are referred to as “prime movers” throughout this manual.) The 2301D is a microprocessor-based digital control designed to include the functions of and be compatible with 2301A load sharing controls. The increased flexibility of software allows the 2301D to include control functions that required additional equipment in previous versions of 2301A control systems. The 2301D therefore is suitable for upgrading existing control systems or increased functionality in new installations.

The control is housed in a sheet-metal chassis and consists of a single printed circuit board. The 2301D is set up and configured through an external computer connected at the 9-pin connector at the front of the control. The configuration software is supplied with each control.

The 2301D provides control in either isochronous, droop, or base load. The 2301D will allow for soft load transfer when being added to or removed from a bus.

The isochronous mode is used for constant prime mover speed with:

 Single prime mover operation or

 Two or more prime movers controlled by Woodward load sharing control systems on an isolated bus

The droop mode is used for speed control as a function of load with:

 Single prime mover operation on an infinite bus or

 Parallel operation of two or more prime movers

The base load mode provides constant load level operation against a bus with the load controlled by the 2301D.

 The load setting is set by a fixed reference,

 or an external analog input,

 or external contact control of the reference.