Description
- Product Model: 9905‑792
- Brand: Woodward
- Warranty: One Year
- Input Voltage: 18‑32 VDC nominal 24 VDC operating supply
- Operating Temperature: ‑40 °C to +70 °C
- Storage Temperature: ‑45 °C to +85 °C
- Response Time: <20 ms speed loop closed‑loop response
- Protection Class: IP20 enclosure (cabinet‑mount unit)
- Accuracy Class: ±0.25 % speed regulation accuracy
- Output Frequency: N/A (actuator drive output)
- Rated Current Range: Max 6 A continuous actuator driver output; 15 W max power consumption
- Communication Interface: Magnetic pickup speed sensor input, analog 4‑20 mA I/O, discrete I/O terminals, RS‑485 service port
- Supported Protocols: Woodward proprietary service protocol, analog 4‑20 mA setpoint & feedback
- Overload Capacity: Short‑circuit and over‑current protection for actuator drive outputs; reverse‑voltage input protection
- Dimensions: 275 mm × 210 mm × 85 mm
Product Overview
The Woodward 9905‑792 is a ProAct Plus digital speed and load‑sharing controller for diesel and gas generator prime‑mover sets. This cabinet‑mount governor accepts magnetic‑pickup speed signals, analog set‑point commands and discrete status inputs, and outputs pulse‑width‑modulated drive signals to control fuel‑actuator position. It integrates isochronous speed regulation, generator load sharing, droop control, over‑speed protection and configurable start‑up ramps within one standalone unit. It addresses typical gen‑set pain points including unstable frequency under varying load, poor load‑balance across parallel generators, and complex discrete external protection circuitry. Power‑plant commissioning engineers, gen‑set technicians and marine‑automation integrators benefit from this hardware; built‑in parallel‑operation capability removes extra external load‑sharing hardware, configurable ramp‑profiles smooth engine startup and load application, and front‑panel status indicators simplify on‑site tuning and fault diagnosis for critical backup and continuous‑duty generator systems.
Application Scenarios
- Land‑based Parallel Generator Backup Plants: Installed inside gen‑set control cabinets for multi‑unit standby power systems. Executes precise isochronous speed control and active load‑sharing among paralleled diesel generators to stabilise bus frequency and evenly distribute real power across units during grid‑loss events.
- Marine On‑Board Auxiliary Gen‑set Control: Deployed for ship‑board auxiliary diesel generators. Wide operating‑temperature range and robust input‑protection tolerate harsh marine cabinet conditions; droop / isochronous modes support both island‑mode and parallel‑bus marine power‑system requirements.
Reviews
There are no reviews yet.