Description
Product Datasheet & Technical Parameters
- Brand: WOODWARD
- Model: 9907-028
- Series: SPM-A Series
- Product Name: Synchronizer
- Manufacturing Origin: United States
- Physical Condition: Brand New / Factory Sealed
- Dimensions: Standard Industrial Enclosure Module
- Weight: Approx. 1.1 kg (2.4 lbs)
- Country of Origin: USA
- Power / Input Rating: 50/60 Hz Frequency (Bus and Generator), 10° Phase Angle, No Voltage Matching
Product Overview & Introduction
The WOODWARD 9907-028 SPM-A Synchronizer is a precision electronic control module engineered to automatically synchronize generator sets to an electrical bus. It continuously monitors the phase angle and system frequency, issuing accurate correction signals to the prime mover governor to match speed and phase before breaker closure. Built with high-reliability industrial microprocessors and ruggedized electronic components, this module ensures seamless synchronization, optimal governing control, and stable power distribution in critical industrial environments.
Operational Specifications & Guidelines
Prior to installation, ensure that all electrical power sources and control circuits are completely de-energized and locked out to prevent electrical shock or arc flash hazards. Mount the 9907-028 module securely within a protective, environmentally controlled industrial control cabinet or panel enclosure, allowing adequate clearance for heat dissipation and wiring access. Connect the potential transformer (PT) inputs for the bus and generator (50/60 Hz frequency), auxiliary power supply, and control output lines strictly in accordance with the manufacturer’s wiring schematics. Verify all terminal connections and ensure proper grounding before restoring system power. Calibrate response thresholds carefully to match the dynamic characteristics of the prime mover system.
Startup & Shutdown Sequencing
To prevent breaker tripping, out-of-phase synchronization, or control system instability, operators must strictly follow the defined startup and shutdown procedures.
- Startup Sequence:
- Verify all external wiring, PT inputs, control power, and safety interlocks are securely connected and verified.
- Energize the system control power supply to the WOODWARD 9907-028 module and perform a complete self-test and diagnostic check.
- Start the prime mover and allow it to reach rated nominal speed and thermal stability under governor control.
- Enable the synchronizer module to monitor bus and generator frequency, as well as the 10° phase angle relationship.
- Engage the automatic synchronizing mode, allowing the unit to issue speed adjustments and automatically close the generator circuit breaker precisely at the synchronous point.
- Shutdown Sequence:
- Gradually transfer active electrical load away from the generator set back to the main utility grid or companion generators until unloaded.
- Open the main generator circuit breaker manually or via system command to isolate the generator electrically from the busbar.
- Initiate the standard prime mover cool-down cycle at idle speed for the required duration.
- Issue the stop command to shut down the engine or turbine completely.
- De-energize the auxiliary control power to the synchronization module only after the prime mover has come to a complete standstill.
Frequently Asked Questions (Q&A)
- Q1: What frequency range is supported by the WOODWARD 9907-028 SPM-A Synchronizer?
- A1: The unit is designed to operate with standard 50/60 Hz frequency inputs for both the bus and generator monitoring circuits.
- Q2: Does this model include automatic voltage matching capabilities?
- A2: No, this specific model is configured with no voltage matching features, focusing strictly on frequency and phase angle synchronization.
- Q3: What is the specified phase angle configuration for this synchronizer model?
- A3: This unit features a 10° phase angle configuration to safely control and time the breaker closure.
