Description
⚙️ Product Datasheet & Technical Parameters
- Brand: WOODWARD
- Model: 9905-002 (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)
📖 Product Overview & Description
The Woodward SPM-A Synchronizer (Part 9905-002) is an accurate, highly reliable synchronizing instrument designed for automatic paralleling of generators. It works by measuring the frequency, phase angle, and voltage of both the generator and the bus, issuing close signals to the circuit breaker when all parameters match within specified limits.
Equipped with a voltage matching capability of 1 percent, it ensures seamless synchronization to minimize electrical transients and mechanical shock. The unit features three flexible output options—high impedance, low impedance, and EPG—allowing it to interface smoothly with various types of governors and control actuators.
🛠️ Operating Specifications & Usage Methods
Proper installation and correct wiring are essential for safe synchronization. All control and sensing lines, including Bus and Generator potential transformer (PT) inputs, must be installed using proper gauge wiring isolated from high-voltage power lines to prevent signal distortion or phase errors.
During configuration, verify that the nominal voltage and frequency selections match the local electrical distribution system (115 or 230 VAC RMS at 50/60 Hz). Select the appropriate output option (high impedance, low impedance, or EPG) based on the input specifications of the connected actuator or speed control governor. Calibrate the phase angle and voltage matching windows carefully during initial commissioning.
⚡ Startup & Shutdown Sequence
Following a precise sequence during startup and shutdown ensures safe breaker closure and system protection.
- Startup Sequence: First, energize the system control architecture and verify that Bus and Generator PT inputs are accurately reading voltages. Power on the SPM-A synchronizer and confirm status indicators are normal. Bring the incoming generator up to rated speed and voltage. Engage the automatic synchronizer circuit, allowing the unit to monitor phase angle and frequency difference. Once exact synchronization parameters are met, the unit triggers the breaker close output safely.
- Shutdown Sequence: Initiate the un-loading sequence of the parallel generator through active power reduction. Open the generator circuit breaker manually or via protective relay commands to decouple it from the energized bus. Shut down the prime mover according to standard operational guidelines, and finally power down the control and synchronization circuits.
❓ Frequently Asked Questions (Q&A)
- Q1: What are the available output options on the SPM-A Part 9905-002?
- A1: The unit features three distinct output options: high impedance, low impedance, and EPG, providing compatibility with a wide range of speed controls and governors.
- Q2: What are the input voltage and frequency parameters supported by this synchronizer?
- A2: It supports 115 or 230 VAC RMS input voltages and operates on standard 50/60 Hz frequency systems for both Bus and Generator inputs.
- Q3: What level of voltage matching precision does the SPM-A provide?
- A3: It provides a tight voltage matching capability of 1 percent to ensure minimal electrical disturbance during generator paralleling.
