Description
- The Woodward 8271-756 is a specialized member of the 2301A series, designed for the precise control of diesel engines, gas engines, or steam turbines. This analog control system is highly regarded in the industry for its ability to manage engine speed and balance the electrical load between multiple generator sets operating in parallel. It provides the essential interface between the magnetic pickup (speed sensor) and the engine actuator.
Product Specifications
- Model Number: 8271-756
- Manufacturer: Woodward
- Control Type: Analog Load Sharing and Speed Control
- Input Voltage: 18-40 VDC (Nominal 24 VDC)
- Power Consumption: 5 Watts maximum
- Speed Sensing: Magnetic Pickup (1.0 to 30 Vrms)
- Actuator Output: 0–200 mA
- Load Sharing: ± 2.5 VDC proportional to load
- Dimensions: 203mm x 113mm x 58mm
- Weight: 0.8 kg (1.76 lbs)
- Country of Origin: USA
Application Fields
The versatility of the 8271-756 makes it a standard component in power infrastructure, specifically:
- Emergency standby power systems for hospitals and data centers.
- Parallel generator operations in remote mining sites.
- Marine engine control for propulsion and onboard power generation.
- Industrial co-generation plants using steam turbines.
Usage Instructions
To ensure the Woodward 8271-756 operates correctly, it must be mounted in a location protected from extreme moisture and high-vibration zones. Connect the speed sensor (MPU) using twisted-pair shielded cable to minimize signal noise. The unit features several potentiometers (pots) on the front face—such as Rated Speed, Gain, and Reset—which allow for manual tuning of the engine’s dynamic response. When configuring for load sharing, ensure the “Load Gain” is calibrated so that each generator carries its fair percentage of the total bus load. Always disconnect the actuator before performing high-voltage insulation tests on the wiring.
Frequently Asked Questions (Q&A)
Q: Does this unit support “Isochronous” load sharing? A: Yes, the 8271-756 is designed for isochronous operation, meaning it can maintain a constant frequency (speed) regardless of the load applied, as long as the generators are properly linked via the load-sharing lines.
Q: What should I do if the engine is “hunting” or unstable at idle? A: This is usually a tuning issue. You should slowly adjust the “Gain” and “Stability” potentiometers. Reducing the gain often stabilizes a surging engine, though it may make the response slightly slower to load changes.
Q: Can I replace an older 2301 series with this 2301A model? A: In most cases, yes. The 2301A series was designed to be backward compatible with many older 2301 units, though you should verify the specific voltage and actuator output requirements of your existing setup.
Related Model Recommendations
- Woodward 8273-501 (2301A Speed Control)
- Woodward 9907-018 (2301A Full Chassis)
- Woodward 8272-466 (2301A Load Sharing)
- Woodward 9907-173 (2301D Digital version)
- Woodward 8440-1713 (EGS Digital Speed Control)
