WOODWARD | 9905-355 | DLSC Digital Load Sharing Control

Description

📊 Product Technical Parameters

• Brand: WOODWARD
• Model: 9905-355
• Series: DLSC (Digital Load Sharing Control) Series
• Product Name: Digital Load Sharing Control Module for Three-Phase AC Generators
• Country of Origin: USA
• Condition Status: Industrial Factory Original / Brand New In-Stock
• Dimensions: Standard modular enclosure format (approx. 215.9 mm x 184.2 mm x 49.2 mm)
• Weight: Approximately 1.3 kg (2.8 lbs)
• Original Region: United States
• Power Supply / Rating: 120/240 VAC voltage input configuration with full operational functions

⚙️ Operation Specifications and Usage Methods

• Installation Preparation: Ensure all power sources to the electrical control cabinet are completely locked out. Mount the modular chassis securely inside a protective industrial enclosure, ensuring proper shielding and grounding against electromagnetic interference.
• Parameter Configuration: Configure the 120/240 VAC voltage inputs and set the Wye potential transformer (PT) configuration via internal jumpers or switches. Calibrate the 0.5 to 4.5 VDC speed bias output to match the precise control input requirements of the electronic governor.
• Operational Control: Connect the module within a multi-unit generator network to manage proportional isochronous load sharing and active power balancing across all parallel three-phase AC generators.

⚡ Startup and Shutdown Sequence

• Startup Sequence:
  1. Inspect all terminal wiring, confirming proper isolation across the Wye PT configuration and the 120/240 VAC voltage input lines.
  2. Energize the system auxiliary power supplies and verify that the DLSC module powers on without diagnostic fault flags.
  3. Start the prime mover and bring the generator up to rated operating speed and nominal voltage.
  4. Engage the parallel control circuit to allow the DLSC module to begin active load sharing via the speed bias output.
• Shutdown Sequence:
  1. Transfer active electrical load away from the generator unit using manual or automated base-load shedding.
  2. Open the generator circuit breaker to completely decouple the unit from the shared electrical busbar.
  3. Shut down the prime mover engine or turbine according to standard mechanical safety protocols.
  4. De-energize the input power supplies and control circuits once the system is fully offline.

💡 Product Description

The Woodward 9905-355 is a full-function Digital Load Sharing Control (DLSC) module engineered specifically for three-phase AC generators operating in parallel. It features a 120/240 VAC voltage input, a Wye PT configuration, and a reliable 0.5 to 4.5 VDC speed bias output to ensure precise, balanced proportional load distribution across multi-generator power systems.

❓ Frequently Asked Questions (Q&A)

• Q: What type of speed bias output does the 9905-355 provide?
  • A: It delivers a 0.5 to 4.5 VDC speed bias output signal to interface smoothly with compatible electronic engine governors.
• Q: What PT configuration does this specific part support?
  • A: It is built to support a Wye potential transformer (PT) configuration with 120/240 VAC voltage inputs.
• Q: What is the primary purpose of the DLSC module in a generator system?
  • A: Its primary purpose is to provide accurate proportional load sharing and active power balancing between multiple parallel-running AC generators.