Description
Woodward 5448-893 SPM-D1010В
Technical Specifications
- Model Designation: SPM-D1010В (Part Number: 5448-893).
- Voltage Measurement: Configured for 100 Vac secondary voltage transformer (PT) inputs.
- Current Measurement: Standard configuration with no Current Transformer (CT) inputs.
- Power Supply: Operates on a 24 Vdc control power supply.
- Mounting Style: Flush-mounted panel design.
Functional Features
- Automatic Synchronization: Continuously calculates the optimal slip frequency and phase angle to close the circuit breaker at the precise zero-crossing moment.
- Synch-Check Functionality: Validates that the generator and bus are already within acceptable tolerances before permitting a manual or automatic close command.
- Dead Bus Start: Features an asynchronous add-on function that allows the generator breaker to close safely when the bus is completely de-energized.
- Discrete I/O Integration: Accepts external commands for raising/lowering speed and voltage, and provides relay outputs for breaker close, synch-check status, and ready-for-operation.
Application Scenarios
Extensively deployed in diesel generator paralleling switchboards, marine power plants, industrial cogeneration facilities, and microgrid control panels requiring reliable and automated generator synchronization.
Performance Parameters
- Synchronization Accuracy: Maintains extremely tight phase angle and voltage differential tolerances to prevent mechanical shock to the generator shaft.
- Processing Speed: High-speed microprocessor ensures real-time tracking of rapidly changing grid or generator conditions.
- Environmental Tolerance: Rated for continuous operation in industrial environments with high electromagnetic interference.
Material Composition
Housed in a robust, industrial-grade metal enclosure with a front-panel foil overlay. Internal printed circuit boards feature conformal coating to protect against moisture, dust, and corrosive gases.
Structural Characteristics
- Form Factor: Compact flush-mount design with precise cutout dimensions (138 mm x 68 mm) for seamless panel integration.
- User Interface: Features front-panel LEDs for visual status indication and push-buttons for local manual control and parameter configuration.
- Connectivity: Rear screw-type terminals for secure field wiring, utilizing 60/75 °C copper wire.
Working Principle
The SPM-D1010В continuously samples the voltage waveforms from both the generator and the bus. Its internal microprocessor calculates the phase difference, frequency slip, and voltage magnitude difference. When all parameters fall within the pre-programmed safe windows, it issues a timed close command to the circuit breaker exactly as the phase angles align.
Installation Requirements
- Panel Cutout: Ensure the panel cutout strictly adheres to the specified 138 [+1.0] x 68 [+0.7] mm dimensions.
- Wiring: Use Class 1 wire or equivalent, and strictly separate high-voltage power cables from low-voltage signal wiring to prevent noise interference.
- Grounding: Ensure a solid, low-impedance ground connection to the panel to maintain electromagnetic compatibility.
Usage Precautions
- Parameter Configuration: Incorrectly setting the PT ratio or synch-check limits can result in out-of-phase closing, causing catastrophic equipment damage.
- ESD Protection: Always observe electrostatic discharge precautions when accessing internal components or connecting the USB configuration interface.
- Routine Testing: Periodically test the synch-check and dead bus start functions to verify relay logic and breaker timing.
