- Manufacturer: Woodward
- Model Series: 2301A (Electronic Control)
- Part Number: 8272-288
- Control Functions: Speed Control and Isochronous or Droop Load Sharing
- Input Power: 24V DC (Standard operating range 18V to 40V DC)
- Signal Input: Magnetic Pickup (MPU) for engine speed sensing
- Actuator Output: 0-200 mA current signal for proportional actuators
- Load Sensing: 3-Phase CT (Current Transformer) inputs and PT (Potential Transformer) inputs
- Adjustment Range: Selectable speed ranges and adjustable gain/stability potentiometers
- Environmental Rating: Chassis mount designed for control cabinet installation
- Temperature Range: -40°C to +85°C operating ambient
- Compatibility: Compatible with most diesel, gas, and gasoline engines or steam turbines
The WOODWARD 2301A 8272-288 acts as a robust electronic governor designed to provide precise frequency and load regulation for engine-generator sets. This specific model integrates advanced analog circuitry to maintain constant engine speed (isochronous) or allow for proportional speed decrease (droop) during parallel operation with other power sources. By continuously monitoring both the engine’s RPM via a magnetic pickup and the electrical load through transformer inputs, the 8272-288 calculates the exact fuel demand required to maintain stability under varying load conditions, ensuring high-quality power output for critical industrial and marine electrical grids.
Differences from Similar Models
The 8272-288 is a low-voltage DC version of the 2301A series, distinguishing it from high-voltage AC models like the 8271-467 which operate on 115/230V AC. Unlike the standard 2301 series, the “A” revision features improved environmental sealing and enhanced RFI (Radio Frequency Interference) shielding to prevent electromagnetic noise from disrupting the speed signal. Compared to the basic 2301A Speed Control units, this Load Sharing model includes the additional internal circuitry required for parallel generator operation, whereas the “Speed Control Only” variants lack the CT/PT inputs necessary for balancing kilowatts between multiple units.
Operating Tips
To achieve the most stable engine response, ensure that the Magnetic Pickup (MPU) is gapped correctly to provide a minimum of 1.5 VRMS at cranking speed; a weak speed signal is a primary cause of erratic governing. When setting up load sharing, it is vital that the Phase A, B, and C current transformers are phased correctly relative to the potential transformers to ensure accurate kilowatt sensing. Additionally, always use shielded twisted-pair wiring for the actuator and MPU connections, grounding the shield only at the control end to prevent ground loops that can lead to “hunting” or unstable engine oscillations.
