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Woodward 9905-285
Product Name: Woodward 9905-285 — 2301A Load Sharing & Speed Control (9905/9907 Series)
Product Introduction: The 2301A Load Sharing & Speed Control unit is used in electric generator systems where load sharing is desired. It can be used with diesel or gas engines, or steam or gas turbines. The unit is housed in a sheet-metal chassis consisting of a single printed circuit board, providing control in either isochronous or droop mode.
Detailed content
Technical Specifications:
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Power Supply: Low voltage model: 20–40 Vdc; High voltage model: 90–150 Vdc or 88–132 Vac
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Internal Power Consumption: < 15 W
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Load Sensing: 90–240 Vac 3Ø, 45–66 Hz; 3Ø current transformer input
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Speed Sensor: Magnetic pickup, 1.0–30 Vac
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Speed Range (switch-selectable): 500–1500 Hz, 1000–3000 Hz, 2000–6000 Hz (standard), 4000–12,000 Hz
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Actuator Output: 0 to 200 mA, 30 to 45 Ω
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Steady-State Speed Band: ±0.25% of rated speed
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Load Sharing: Within ±5% of rated load with speed settings matched
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Droop: 0 to 10% range for 6 Vdc load gain
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Ramp Times: Acceleration and deceleration individually adjustable from 0 to 20 seconds
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Operating Temperature: –40 to +85 °C
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Vibration: 4 Gs, 5 to 500 Hz
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Shock: 60 Gs
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Weight: Approx. 1.8 kg (4 lb)
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Finish: Gloss powder coat
Functional Features:
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Low- and high-voltage models
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Idle and rated speed settings
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Adjustable idle to rated speed linear ramps
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Automatic start-fuel limiting
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Failed speed sensor detector
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Four switch-selectable speed ranges
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Isochronous load sharing
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EU Directive Compliant (low voltage models)
Installation Requirements: Install in a sheet-metal chassis in a location with adequate ventilation, service access, protection from water and condensation, isolation from EMI sources, and isolation from excessive vibration. Operating temperature range –40 to +85 °C. The control must not be mounted directly on the engine.
Application Scenarios: Generator systems requiring load sharing between two or more prime movers on an isolated bus; base loading against an infinite bus; parallel operation of diesel, gas, steam, or gas turbine-driven generators.
