Description
Product Datasheet & Technical Parameters
- Brand: WOODWARD
- Model: 9905-001
- 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, 50/60 Hz Frequency (Bus and Generator), 10° Phase Angle
Product Overview & Introduction
The WOODWARD 9905-001 SPM-A Synchronizer is a precision electronic control module designed to automatically synchronize generator sets to an electrical bus. It continuously monitors the phase angle, bus frequency, and generator frequency, issuing correction signals to the prime mover governor to match speed and phase before breaker closure. Featuring built-in versatility with flexible output options including high impedance, low impedance, and EPG (Electronic Packard Governor), this unit ensures seamless, safe, and reliable paralleling in critical industrial power generation systems.
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, 50/60 Hz), power supply connections, phase angle settings (10°), and appropriate output lines (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 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 9905-001 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 voltage, frequency, and 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 output options are supported by the WOODWARD 9905-001 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 input voltage and frequency ratings for the bus and generator?
- A2: The module is designed to accept 115 or 230 VAC RMS inputs at either 50 Hz or 60 Hz frequency for both the bus and generator monitoring circuits.
- Q3: What is the specified phase angle configuration for this synchronizer model?
- A3: This specific model is configured with a 10° phase angle parameter to safely control breaker closure timing.
