WOODWARD | 9905-712 | DSLC Digital Synchronizer Load Control

Description

📊 Product Technical Parameters

• Brand: WOODWARD

• Model: 9905-712

• 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)

• Power Supply / Rating: 120/240 VAC voltage input configuration with full upgrade level 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, adhering to proper grounding precautions to protect static-sensitive microprocessor components.

• Parameter Configuration: Configure the 120/240 VAC voltage inputs and set up the unit using the handheld programmer or configuration software. Calibrate the 1 to 5 VDC speed bias output and full-feature parameters (including VAR/power factor control and process control) to match the prime mover speed control and automatic voltage regulator.

• Operational Control: Interface the DSLC module with the generator switchgear to automate synchronizing, dead bus closing, isochronous load sharing, and power factor regulation across parallel-running three-phase AC generators.

⚡ Startup and Shutdown Sequence

• Startup Sequence:

  1. Inspect all terminal wiring, confirming proper isolation across potential transformer and auxiliary power lines.

  2. Energize the system 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 unit to manage frequency matching, phase alignment, and breaker closure, followed by active load balancing 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 9905-712 is a full upgrade-level microprocessor-based Digital Synchronizer and Load Control (DSLC) module designed for three-phase AC generators operating in parallel. Combining synchronizing, load sensing, load control, dead bus closing, and advanced power factor/process control into a single comprehensive package, it utilizes three-phase true RMS power sensing to maintain high precision even under unbalanced phase loading and voltage fluctuations.

❓ Frequently Asked Questions (Q&A)

• Q: What speed bias output specification does the 9905-712 model utilize?

  • A: It features a 1 to 5 VDC speed bias output configuration to interface with compatible electronic engine governors.

• Q: What advanced control functions are included in this full upgrade model?

  • A: In addition to standard synchronization and load sharing, it includes full capabilities for VAR/power factor control and process control functions.

• Q: How does the unit maintain accuracy during voltage irregularities?

  • A: It incorporates three-phase true RMS power sensing, ensuring calculation accuracy during voltage fluctuations and unbalanced phase loads