Description
Woodward SPM-D2-10/YB
Technical Specifications
- Model: SPM-D2-10/YB
- Voltage Measurement: Three-phase / Four-wire True RMS
- Bias Signals: Discrete bias signals
- Power Supply: Wide-range power supply options
Functional Features
- Three-Phase Monitoring: Simultaneously monitors all three phases for voltage magnitude and phase sequence.
- Class I Accuracy: Ensures highly precise voltage detection for safe paralleling.
- Direct Replacement: Maintains the same form factor as legacy SPM-D units.
Application Scenarios
Essential for large industrial facilities, commercial buildings, and power distribution networks operating on three-phase power where single-phase measurement is insufficient.
Performance Parameters
- Frequency Measurement: 50/60Hz (40 to 70Hz range).
- Input Resistance: High impedance to prevent loading of voltage transformer circuits.
- Short-time Overcurrent: Withstands 50× rated current for 1 second (for 1A variants).
Material Composition
Built with industrial-grade semiconductors and high-reliability passive components, tested to withstand harsh electrical transients.
Structural Characteristics
- Terminal Layout: Optimized for three-phase VT connections and neutral.
- Display: Dual-line LCD showing all three phase voltages and synchronization status.
Working Principle
Measures the true RMS voltage of all three phases of both the generator and the bus. It verifies correct phase sequence and calculates the average slip frequency across all phases to determine the optimal synchronization point.
Installation Requirements
Ensure correct phase rotation (L1, L2, L3) and neutral connections. Incorrect VT wiring will prevent synchronization and trigger alarms.
Precautions for Use
Verify that the voltage transformer secondary ratings match the SPM-D2-10/YB input specifications (e.g., 115V or 400V) to prevent damage.
