Description
Product Datasheet & Technical Parameters
- Brand: WOODWARD
- Model: 9907-004
- Series: MSLC (Master Synchronizer and Load Control) Series
- Product Name: Master Synchronizer and Load Control Unit
- Manufacturing Origin: United States
- Physical Condition: Brand New / Factory Sealed
- Dimensions: Standard Industrial Enclosure Module (461 \times 265 \times 59 mm / 18.15 \times 10.43 \times 2.32 in)
- Weight: Approx. 6 lbs 14 oz (3.12 kg)
- Country of Origin: USA
- Power / Input Rating: DC Auxiliary Power Supply, Three-Phase Bus Sensing Inputs, Equipped with Handheld Programming Terminal Compatibility for Full Setup and Diagnostics
Product Overview & Introduction
The WOODWARD 9907-004 is an advanced microprocessor-based Master Synchronizer and Load Control (MSLC) unit designed to coordinate multi-generator power systems operating in parallel with utility grids or companion busbars. Working alongside Digital Synchronizer and Load Control (DSLC) units, the MSLC manages total plant load, utility export/import power levels, and system frequency. Equipped to interface with a dedicated handheld programming terminal, this unit allows operators to execute complete system configurations, calibrations, and real-time diagnostic checks effortlessly.
Operational Specifications & Guidelines
Prior to installation or handling, ensure that all electrical power sources are completely de-energized and discharge any static electricity from your body to ground by touching a grounded metal object, as the unit is static-sensitive. Mount the 9907-004 module securely inside a protective sheet metal panel control enclosure, maintaining an operating temperature range between -40^\circC and 70^\circC and relative humidity levels up to 95\%. Connect the auxiliary DC power supply, three-phase bus potential transformer (PT) sensing lines, communication links to subordinate DSLC units, and control wiring strictly in accordance with the manufacturer’s wiring schematics. Verify all terminal connections and ensure system grounding integrity before restoring power.
Startup & Shutdown Sequencing
To prevent system instability, power surges, or out-of-phase transitions, operators must strictly follow the defined startup and shutdown procedures.
- Startup Sequence:
- Verify all external wiring, bus potential sensing lines, communication network cables, and safety interlocks are securely fastened.
- Energize the DC control power supply to the WOODWARD 9907-004 module and connect the handheld programming terminal or check the display to complete the internal diagnostic self-test.
- Initialize subordinate generator sets and allow them to reach rated nominal speed and thermal stability under individual governor control.
- Enable the MSLC module to monitor main bus voltage, frequency, and power transfer parameters relative to the utility grid.
- Engage automatic master plant control, allowing the unit to coordinate base loading, peak shaving, and power import/export regulation seamlessly across the generation network.
- Shutdown Sequence:
- Gradually ramp down plant power export or transfer active electrical load away from parallel generators back to the main utility grid using the MSLC control interface.
- Open individual generator and tie-line circuit breakers manually or via system command to isolate the units electrically from the main busbar.
- Initiate standard cool-down cycles for all prime movers at idle speed for the required duration.
- Issue stop commands to shut down all engines or turbines completely.
- De-energize the auxiliary control power to the MSLC and subordinate control modules only after all equipment has come to a complete standstill.
Frequently Asked Questions (Q&A)
- Q1: What is the primary function of the WOODWARD 9907-004 MSLC unit?
- A1: The MSLC coordinates multi-generator power plants by managing total plant load, utility import/export power levels, and system frequency when operating in parallel with a utility grid.
- Q2: How are system setup and diagnostics performed on this model?
- A2: The unit is equipped to interface with a handheld programming terminal, allowing technicians to execute full setup configurations and comprehensive diagnostic routines.
- Q3: What precautions should be observed when handling this master control module?
- A3: Technicians must ensure all power sources are locked out, discharge static electricity to a grounded metal object before handling the unit due to its static-sensitive electronics, and follow standard wiring diagrams.
