Digital guide
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Woodward 9907-175/A
Product Overview
A dedicated load sharing and synchronization module designed to connect Woodward power generation accessories with Caterpillar engines equipped with digital speed governors (PWM input). It enables precise isochronous or droop load sharing between Caterpillar-controlled gensets and those using Woodward electronic governors, ensuring stable parallel operation in mixed-brand power systems.
Detailed content
Technical Specifications
- Power Supply: 18–32 VDC, 5 W typical consumption
- Control Compatibility: Caterpillar digital speed controls with PWM input
- Load Sharing Modes: Isochronous (zero droop) and droop (2–5%)
- AC Voltage Input: 100–240 VAC three-phase potential transformer (PT)
- Protection Features: Over-voltage (80 VDC), under-voltage, reverse polarity (-32 VDC)
- Operating Temperature: -40 °C to +70 °C
- Dimensions: 210 mm × 110 mm × 60 mm
- Weight: Approximately 0.95 kg
Functional Characteristics
- Bridges communication between Caterpillar PWM governors and Woodward control devices
- Enables equal real kW load distribution among paralleled generators
- Allows integration of Woodward SPM-A synchronizer and other accessories
- Simplifies retrofitting of mixed-brand genset fleets for parallel operation
- Requires no external cooling; operates reliably in engine room environments
Application Scenarios
Mixed-brand generator power plants, Caterpillar engine-based marine power systems, industrial standby power facilities with heterogeneous gensets, and oil/gas field distributed power generation.
