Description
Product Datasheet & Technical Parameters
- Brand: WOODWARD
- Model: 9905-008
- 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: 115 or 230 VAC RMS, 400 Hz Frequency (Bus and Generator), Phase Angle, Voltage Matching (1), High/Low Impedance and EPG Outputs
Product Overview & Introduction
The WOODWARD 9905-008 SPM-A Synchronizer is a high-performance electronic control module engineered specifically for specialized power generation applications requiring a 400 Hz frequency range, such as aviation, marine, and mobile military systems. It automatically synchronizes generator sets to an electrical bus by continuously monitoring phase angle, bus frequency, and generator frequency, while providing integrated voltage matching to ensure seamless paralleling. Equipped with three versatile output options—high impedance, low impedance, and EPG (Electronic Packard Governor)—this module guarantees precise governor control, optimal breaker closure timing, and stable power distribution in demanding 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. Mount the SPM-A module securely within a protective, environmentally controlled industrial control cabinet or panel enclosure, allowing adequate clearance for heat dissipation and wiring access. Connect the bus and generator potential transformer (PT) inputs (115 or 230 VAC RMS at 400 Hz), power supply connections, voltage matching lines, and appropriate output options (high impedance, low impedance, or EPG) 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 9905-008 module and perform a complete self-test and diagnostic check.
- Start the prime mover and allow it to reach rated nominal 400 Hz speed and thermal stability under governor control.
- Enable the synchronizer module to monitor bus and generator voltage, frequency, phase angle, and voltage matching parameters.
- Engage the automatic synchronizing mode, allowing the unit to issue speed and voltage adjustments, automatically closing 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 output options are supported by the WOODWARD 9905-008 SPM-A Synchronizer?
- A1: The unit features three selectable output options to accommodate various governing systems: high impedance, low impedance, and EPG (Electronic Packard Governor).
- Q2: What are the specialized input frequency and voltage matching ratings for this model?
- A2: This specific model is designed for 400 Hz frequency applications (Bus and Generator) operating at 115 or 230 VAC RMS, and includes integrated voltage matching capability (level 1).
- Q3: What is the primary application environment for a 400 Hz SPM-A synchronizer?
- A3: Units designed for 400 Hz operation are typically utilized in specialized aerospace, marine, defense, and advanced industrial power systems where standard 50/60 Hz frequencies are not used.
