Description
⚙️ Product Datasheet & Technical Parameters
- Brand: WOODWARD
- Model: 9905-366 (DSLC)
- Series: DSLC Digital Synchronizer and Load Control Series
- Product Name: Non-Integrated Digital Synchronizer and Load Control Unit
- Place of Origin: United States
- Condition Status: Brand New / Factory Original Surplus
- Dimensions: 460.65 mm x 264.16 mm x 58.42 mm (Sheet Metal Back Plate Enclosure)
- Weight: Approx. 6 lbs 14 oz (3.1 kg)
- Original Region: USA Manufacturing Plant
- Input Voltage & Power: 120 VAC input voltage
- Core Configuration: Open Delta PT configuration featuring a 0.5 to 4.5 VDC speed bias output (reduced upgrade level without integrated power factor or process control)
📖 Product Overview & Description
The Woodward 9905-366 is a microprocessor-based Digital Synchronizer and Load Control (DSLC) module designed for three-phase AC industrial generators. As a non-integrated digital synchronizer and load controller, it is intended for applications that do not require integrated power factor control or process control functions.
The unit handles generator paralleling, automatic synchronization, loading, and unloading when paired with a compatible electronic speed control (governor) and automatic voltage regulator (AVR). It includes built-in diagnostics, reverse power relaying, and digital signal processing for accurate frequency and load regulation.
🛠️ Operating Specifications & Usage Methods
Proper installation and wiring are essential for stable performance. All potential transformer (PT) sensing lines, control interfaces, and communication connections must use shielded twisted-pair cables routed away from high-voltage distribution lines and variable frequency drives to prevent electromagnetic interference. The unit must be securely mounted inside a protective industrial enclosure.
During commissioning, configure the unit’s parameters—including loading rates, frequency trimming, isochronous or droop load control modes, and synchronization settings—using a handheld programmer terminal or authorized service tool. Verify signal integrity across all voltage and current inputs before initiating system start-up.
⚡ Startup & Shutdown Sequence
Following a structured startup and shutdown sequence protects the prime mover, generator windings, and electrical switchgear from mechanical shock and electrical transients.
- Startup Sequence: First, inspect all mechanical linkages, fuel valves, and safety interlocks. Energize the control power supply to the 9905-366 unit and verify that all status diagnostics indicate normal operation via the handheld programmer or indicators. Crank and start the prime mover, bringing it up to its rated operational speed and nominal voltage using the load raise and lower inputs. Engage the synchronization mode to monitor phase angle or slip frequency, allowing the unit to automatically issue breaker close commands once parameters align safely.
- Shutdown Sequence: Begin by ramping down active power generation through controlled unloading commands until minimum load is achieved. Open the main generator circuit breaker to decouple the unit from the shared electrical busbar. Allow the prime mover to run at a no-load idle state for thermal stabilization cool-down. Issue the stop command to shut down the engine, and finally de-energize the control power supply once all equipment has come to a complete standstill.
❓ Frequently Asked Questions (Q&A)
- Q1: What are the main features of the Woodward 9905-366 non-integrated controller?
- A1: The 9905-366 is a reduced upgrade level controller that operates as a non-integrated digital synchronizer and load controller without integrated power factor or process control functions.
- Q2: What input voltage and PT configuration does this specific model use?
- A2: It operates on a 120 VAC input voltage supply and utilizes an Open Delta PT configuration.
- Q3: How are parameters and diagnostics managed on the 9905-366?
- A3: Setup, metering, system configuration, and diagnostics are fully accessible through a connected handheld programmer terminal.
