Description
⚙️ Product Datasheet & Technical Parameters
- Brand: WOODWARD
- Model: 9905-360 (DSLC)
- Series: DSLC Digital Synchronizer and Load Control Series
- Product Name: Digital Synchronizer and Load Control Unit
- Place of Origin: United States
- Condition Status: Obsolete / Factory Original Surplus
- Dimensions: Approx. 460.65 mm x 264.16 mm x 58.42 mm
- Weight: Less than 7 lbs (Approx. 3.1 kg)
- Original Region: USA Manufacturing Plant
- Compatibility Notes: Functions correctly with newer DSLC part numbers in all operational aspects except for dead bus closing capabilities
📖 Product Overview & Description
The Woodward 9905-360 is an obsolete model from the Digital Synchronizer and Load Control (DSLC) series, designed for multi-generator industrial power systems. It integrates true RMS power sensing, load control, and synchronization into a single device to manage prime mover governors and automatic voltage regulators (AVRs) for smooth parallel operations.
Although designated as obsolete, it maintains full functional compatibility when integrated alongside newer DSLC part numbers within existing power networks, with the specific exception of dead bus closing operations.
🛠️ Operating Specifications & Usage Methods
Proper installation and correct wiring practices are necessary to maintain system stability. All sensing lines, control interfaces, and Local Operating Network (LON) communications must use shielded twisted-pair cables routed away from high-voltage distribution lines and variable frequency drives to eliminate electromagnetic interference. The unit should be securely mounted inside a protective industrial enclosure.
During commissioning, configure all operational parameters—such as loading rates, power setpoints, and synchronization settings—using the authorized service programmer. 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 DC control power supply to the 9905-360 unit and verify that all status diagnostics indicate normal operation. Crank and start the prime mover, bringing it up to its rated operational speed and nominal voltage. Engage the synchronization mode to monitor phase angle or slip frequency, allowing the unit to automatically issue breaker close commands once parameters align safely (noting that dead bus closing functions differ from newer revisions).
- 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 DC power supply once all equipment has come to a complete standstill.
❓ Frequently Asked Questions (Q&A)
- Q1: What is the main compatibility consideration when using the Woodward 9905-360 with newer DSLC modules?
- A1: The 9905-360 functions correctly with newer DSLC part numbers across all standard features, except for dead bus closing operations.
- Q2: What core functions are integrated into this obsolete DSLC unit?
- A2: It combines a true RMS load sensor, generator load control module, and an automated synchronizer into a single hardware package.
- Q3: How does the unit manage generator loading and paralleling?
- A3: It interfaces with electronic speed controls and automatic voltage regulators to deliver bumpless, smooth loading, unloading, and synchronization across parallel generator sets.
