Digital guide
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Woodward 9905-773
Product Name: EasyGen-3000 Series Parallel Generator Controller (OEM Custom Model)
Product Introduction: The 9905-773 is an integrated controller for multi-unit parallel diesel generator sets. It combines speed governing, voltage regulation, synchronizing, and load distribution with protection functions in a single device.
Detailed content
Technical Specifications:
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Three-phase voltage / current measurement accuracy: Class 0.5
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Paralleling capacity: Supports up to 32 units in parallel
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Communications: CAN, Modbus, USB
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Synchronizing close-window: ±5° electrical angle
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Panel size: 96 × 96 mm; rear connector: 36-pin
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Rear depth: < 150 mm
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Panel cutout: 92 × 92 mm
Functional Features: Graphical wizard configuration; black start capability; sequential load add/drop. Real-time calculation of active/reactive power per unit and issuing speed-governing and voltage-regulation commands proportionally to capacity.
Material Composition: Flame-retardant PC front panel combined with a steel enclosure.
Application Scenarios: Data-center standby power supplies; microgrid applications.
Structural Characteristics: 96 × 96 mm panel-mounted instrument with a 36-pin rear connector.
Working Principle: The controller continuously measures each generator’s active and reactive power, then sends speed and voltage regulation commands proportionally according to each unit’s capacity rating to achieve balanced load sharing across the parallel system.
Installation Requirements: Cut a 92 × 92 mm opening on the switchgear panel; ensure rear installation depth is less than 150 mm for the 36-pin connector.
Usage Precautions: CT secondary windings must never be open-circuited. PT fuses must be current-limiting type.
