Description
Woodward SPM-D2-10.8440-2166
Technical Specifications
- Part Number: 8440-2166
- Measurement: 1-phase / 2-wire voltage measurement
- Power Supply: Wide-range AC/DC or 24 Vdc
- Communication: USB port for PC configuration
Functional Features
- Dead Bus Closing: Automatically closes the circuit breaker when the bus is de-energized.
- Multi-Level Protection: Password-protected parameters prevent unauthorized modifications.
- Oscilloscope Display: Visual representation of synchronizing waveforms on the front panel.
Application Scenarios
Applicable in marine vessels, remote mining operations, and utility peaking plants where reliable and automated generator synchronization is required.
Performance Parameters
- Rated Current: 1A or 5A (depending on variant).
- Linear Current Range: 3.0 × Rated Current.
- Burden: < 0.15 VA.
Material Composition
High-dielectric strength internal components with robust external casing designed for IP20 protection in control panels.
Structural Characteristics
- Interface: User-friendly front panel with membrane switches and LCD.
- Mounting: Standard panel cutout compatible with older SPM-D models.
Working Principle
Samples the instantaneous voltage waveforms of both sources. Calculates the rate of change of phase angle (slip) and predicts the exact moment when the phase difference will be zero, issuing the close command precisely in advance to compensate for breaker closure time.
Installation Requirements
Route voltage sensing wires away from high-current power cables to prevent electromagnetic interference. Use twisted-pair wiring for all analog control outputs.
Precautions for Use
Always verify the generator and bus voltage transformer (VT) ratios and phase rotations before initial commissioning.
