Description
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⚙️ Product Datasheet & Technical Parameters
- Brand: WOODWARD
- Model: 9905-009 (SPM-A)
- Series: SPM-A Synchronizer Series
- Product Name: Synchronizer Unit
- Place of Origin: United States
- Condition Status: Brand New / Factory Original Surplus
- Dimensions: Standard Panel Mount Enclosure (Approx. 150mm x 120mm x 60mm)
- Weight: Approx. 1.2 kg
- Original Region: USA Manufacturing Plant
- Power & Frequency Rating: 115 or 230 VAC RMS input voltage, 50/60 Hz frequency rating (applicable to both Bus and Generator)
- Matching Specifications: Phase angle monitoring with a voltage matching capability of 10 percent
📖 Product Overview & Description
The Woodward SPM-A Synchronizer (Part 9905-009) is a reliable automatic synchronizing device engineered for paralleling generators safely and efficiently. It constantly compares the voltage, frequency, and phase angle of both the incoming generator and the live bus, issuing a precise breaker close command when all criteria fall within acceptable synchronization limits.
Featuring a voltage matching threshold of 10 percent, this model accommodates systems with broader matching tolerances. Built with heavy-duty industrial components, it ensures consistent performance in demanding power generation and marine environments, reducing transient currents and mechanical stress during generator synchronization.
🛠️ Operating Specifications & Usage Methods
Proper installation and correct wiring practices are vital for accurate synchronization. All control, sensing, and Potential Transformer (PT) lines for both the Bus and Generator inputs must utilize shielded cabling routed away from high-voltage power lines to prevent electrical noise interference.
During initial setup, verify that the nominal input voltage and frequency jumpers or settings match the local distribution system (115 or 230 VAC RMS at 50/60 Hz). Calibrate the phase angle windows and confirm that the voltage matching limit is appropriately configured for the specific application requirements before initiating any live system tests.
⚡ Startup & Shutdown Sequence
Adhering to a controlled startup and shutdown sequence protects electrical equipment and mechanical drives from unnecessary stress.
- Startup Sequence: First, energize the auxiliary control architecture and confirm that the Bus and Generator PT inputs display correct voltage readings. Power on the SPM-A synchronizer and verify that status LEDs indicate normal operation. Bring the incoming generator up to its rated speed and nominal voltage. Activate the synchronizer circuit to monitor phase angle and slip frequency. Once conditions are satisfied, the unit safely triggers the generator breaker to close.
- Shutdown Sequence: Begin by ramping down the active power of the parallel generator until minimum load is achieved. Open the main generator circuit breaker to decouple the unit from the shared busbar. Allow the prime mover to run at a no-load idle for proper thermal cool-down before bringing it to a complete stop. Finally, de-energize the control power supplies.
❓ Frequently Asked Questions (Q&A)
- Q1: What voltage and frequency inputs does the 9905-009 synchronizer support?
- A1: It supports 115 or 230 VAC RMS input voltages and operates on standard 50/60 Hz frequency systems for both Bus and Generator inputs.
- Q2: What is the specified voltage matching tolerance for this specific part number?
- A2: Part number 9905-009 features a voltage matching capability of 10 percent.
- Q3: How does the SPM-A determine when to close the generator circuit breaker?
- A3: The unit continuously monitors the frequency difference, phase angle, and voltage differential between the generator and the bus, sending a close signal only when all parameters align within the predefined safe window.
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