Description
⚙️ Product Datasheet & Technical Parameters
- Brand: WOODWARD
- Model: 8440-1025 (SPM-D21)
- Series: SPM-D21 / PSV Synchronizer Series
- Product Name: Two Breaker Synchronizer and Load Control Module
- Place of Origin: United States
- Condition Status: Brand New / Factory Original Surplus
- Dimensions: Standard Panel Mount Enclosure (Approx. 144mm x 144mm x 100mm)
- Weight: Approx. 1.0 kg
- Original Region: USA Manufacturing Plant
- Input & Measurement Specs: Features 2-phase generator voltage, 1-phase generator current, and a 400 VAC input voltage rating
📖 Product Overview & Description
The Woodward SPM-D21 (Part 8440-1025) is an advanced microprocessor-based two-breaker synchronizer and load control module designed for use on three-phase AC generators. It is built to operate seamlessly with Woodward or other compatible prime mover speed controls and automatic voltage regulators (AVRs).
The unit integrates multiple power management functions, providing automatic frequency, phase, and voltage matching using either analog or discrete output signals. It handles synchronization independently for a generator circuit breaker (GCB) and a mains/utility circuit breaker (MCB), while incorporating active real power control, power factor regulation, and comprehensive generator and mains protection.
🛠️ Operating Specifications & Usage Methods
Proper installation and wiring practices are essential for achieving reliable synchronization and load control. All potential transformer (PT) voltage sensing inputs (handling up to 400 VAC) and current transformer (CT) lines must be wired using shielded cables separated from high-voltage distribution lines to prevent signal distortion and electromagnetic interference.
During system configuration, use the front panel interface or the authorized PC software tool to define nominal system parameters, voltage and frequency thresholds, phase angle limits, and circuit breaker time compensation. Select the appropriate control output mode (analog or discrete bias) to match the specifications of the connected governor and AVR before initiating live grid or bus synchronization tests.
⚡ Startup & Shutdown Sequence
Following a structured startup and shutdown sequence protects switchgear components, the generator, and prime mover equipment from mechanical shock and electrical transients.
- Startup Sequence: First, inspect all auxiliary control circuits, safety interlocks, and circuit breaker mechanisms. Energize the control power supply and verify that all 2-phase generator and bus voltage inputs display accurate measurements on the module’s display. Bring the generator up to its rated operational speed and nominal voltage. Activate the synchronizer mode to monitor slip frequency and phase angle, letting the unit automatically issue close commands to the configured breakers or contactors once all parameters safely align.
- Shutdown Sequence: Begin by ramping down active power generation through load reduction commands until minimum load is achieved. Open the main generator and mains circuit breakers to decouple the unit from the electrical network. Allow the prime mover to run at a no-load idle state for thermal stabilization cool-down. Issue the stop command to shut down the engine, and finally de-energize the control power supply once all motion has completely ceased.
❓ Frequently Asked Questions (Q&A)
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- Q1: What is the primary function of the Woodward 8440-1025 module?
- A1: It serves as a dual-breaker synchronizer and load control module capable of managing synchronization for both a generator circuit breaker and a mains circuit breaker.
- Q2: What type of generator sensing inputs does this specific part number support?
- A2: Part number 8440-1025 features 2-phase generator voltage sensing, 1-phase generator current sensing, and a 400 VAC maximum input voltage rating.
- Q3: How does the SPM-D21 interface with the engine governor and AVR?
- A3: It provides automatic frequency, phase, and voltage matching using either configurable analog bias outputs or discrete control signals.
- Q1: What is the primary function of the Woodward 8440-1025 module?
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