Woodward 9903‑445 2301A Load Sharing & Speed Controller

Woodward 9903‑445 is an analog‑type load‑sharing and speed controller belonging to the classic 2301A series. It is designed for diesel‑engine and gas‑turbine generator sets, implementing precise speed regulation and real kW load‑sharing for multiple gensets operating in parallel mode, supporting both droop and isochronous control modes.

This chassis‑mount governor unit accepts magnetic pickup speed signal and generator power feedback signal, outputs proportional driving signal to fuel actuator. It supports idle‑rated speed transfer function and external potentiometer parameter adjustment. It is widely used as replacement spare‑part for on‑site troubleshooting, equipment maintenance and legacy power‑generation‑system retrofit projects.

Main Specifications

• Brand: Woodward
• Model: 9903‑445 (2301A series)
• Product Type: Analog Load‑Sharing & Speed Governor Controller
• Power Supply: 18‑40 VDC operating power input
• Speed Input: Magnetic pickup (MPU) sensor signal input
• Control Mode: Isochronous / droop speed control, real kW load‑sharing
• Actuator Output: Proportional current output for fuel actuator driving
• Feature: Idle‑rated speed switch, external potentiometer adjustable parameters
• Mounting: Metal chassis rack‑mount installation inside generator control cabinet
• Operating Temperature Range:‑20℃ ~ +65℃
• Application: Spare‑part replacement for generator‑set speed‑control equipment

Core Functions

• Receive rotational‑speed signal from magnetic pickup sensor to realize closed‑loop engine speed regulation
• Realize real‑active‑power load‑sharing for multiple parallel‑running generator sets to balance output power
• Support isochronous and droop control modes, switch between idle speed and rated operating speed
• Output proportional driving current to fuel actuator to adjust fuel supply of diesel or gas engine
• External potentiometers allow on‑site adjustment of speed setting, gain and load‑sharing parameters
• Stabilize generator frequency and load distribution to avoid power oscillation during multi‑genset parallel operation
• Metal chassis structure provides good anti‑vibration performance for engine‑room harsh‑environment conditions
• Chassis‑mount layout facilitates on‑site installation and spare‑part replacement work

Application Scenarios

• Land‑based power‑station multi‑diesel‑genset parallel‑operation control cabinet configuration projects
• Marine vessel generator‑set speed‑governing and load‑sharing control supporting projects
• On‑site governor controller fault replacement and daily genset control‑system maintenance work
• Legacy power‑generation‑equipment renovation for upgrading parallel‑genset load‑balance function
• Legacy Woodward 2301A‑series governor‑system spare‑parts replacement scenarios
• Spare‑parts inventory backup for power‑plant and marine‑engine‑room control cabinets
• Generator‑set control cabinet speed‑governor‑hardware maintenance supporting engineering projects