WOODWARD | 9905-374 | DSLC Digital Synchronizer Load Control

Description

📊 Product Technical Parameters

• Brand: WOODWARD
• Model: 9905-374
• Series: DSLC (Digital Synchronizer and Load Control) Series
• Product Name: Digital Synchronizer and Load 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: 240 VAC voltage input configuration with standard 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 240 VAC voltage inputs and set the Open Delta potential transformer (PT) configuration via internal jumpers or software tools. Calibrate the 500 Hz pulse-width modulation (PWM) speed bias output to match the specific control input requirements of the electronic governor.
• Operational Control: Interface the DSLC module with the generator switchgear to automate synchronizing and active load sharing across parallel-running three-phase AC generators using the PWM control architecture.

⚡ Startup and Shutdown Sequence

• Startup Sequence:
  1. Inspect all terminal wiring, confirming proper isolation across the Open Delta PT configuration and the 240 VAC voltage input lines.
  2. Energize the system auxiliary power supplies and verify that the DSLC 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 automatic synchronization and load sharing mode to allow the DSLC module to manage frequency matching, phase alignment, and breaker closure, followed by active load balancing via the 500 Hz PWM 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 9905-374 is a digital synchronizer and load control (DSLC) module engineered for three-phase AC generators operating in parallel. It integrates precise automatic synchronizing and load sharing functions into a single unit, featuring a 240 VAC voltage input, an Open Delta potential transformer (PT) configuration, and a specialized 500 Hz PWM speed bias output for accurate governor control.

❓ Frequently Asked Questions (Q&A)

• Q: What type of speed bias output does the 9905-374 provide?
  • A: It delivers a 500 Hz pulse-width modulation (PWM) speed bias output signal to interface with compatible electronic engine governors.
• Q: What PT configuration does this specific part support?
  • A: It is built to support an Open Delta potential transformer (PT) configuration with 240 VAC voltage inputs.
• Q: How does the PWM output benefit speed control?
  • A: A PWM output provides a digital pulse-width signal that minimizes electrical noise interference and offers highly accurate speed and load biasing compared to standard analog DC voltage signals.