Description
Product Datasheet & Technical Parameters
- Brand: WOODWARD
- Model: 5448-894
- Series: SPM-D Series (Digital Synchronizer, 1 Synch Point)
- Product Name: SPM-D Synchronizer
- Manufacturing Origin: United States
- Physical Condition: Brand New / Factory Sealed
- Dimensions: 144 × 72 × 122 mm (Standard APRANORM DIN 43700 housing)
- Weight: Approx. 0.8 kg (1.8 lbs)
- Country of Origin: USA
- Power Supply & Features: Low-voltage DC Power Supply, 2-phase generator voltage and 2-phase busbar voltage measuring/display, Analog Bias signals, Mains Failure Recognition, and Generator Protection
Product Overview & Introduction
The WOODWARD 5448-894 is a microprocessor-based digital synchronizer designed for use on multi-phase AC generators equipped with compatible speed controls and automatic voltage regulators (AVRs). It features integrated 2-phase generator and busbar voltage measuring and display functions, along with analog bias output signals for precise frequency and voltage matching. Additionally, this specific model includes comprehensive mains failure recognition and generator protection capabilities to ensure safe and reliable paralleling in industrial power applications.
Operational Specifications & Guidelines
Prior to installation, ensure that all electrical power sources and control circuits are completely de-energized and locked out to prevent electrical shock or arc flash hazards. Mount the 5448-894 synchronizer securely within a protective, environmentally controlled industrial control cabinet or panel enclosure, ensuring adequate clearance for ventilation and wiring access. Connect the power supply, 2-phase generator voltage inputs, 2-phase busbar voltage inputs, and analog bias control lines strictly in accordance with the manufacturer’s wiring schematics. Verify all terminal torque specifications and ensure proper system grounding before restoring power. Configure operating parameters via the front panel interface to match the specific dynamic requirements of the prime mover.
Startup & Shutdown Sequencing
To prevent breaker tripping, out-of-phase synchronization, or control system instability, operators must strictly follow the defined startup and shutdown procedures.
- Startup Sequence:
- Verify all external wiring, voltage measuring inputs, control power, and safety interlocks are securely connected and verified.
- Energize the control power supply to the WOODWARD 5448-894 module and observe the display during the internal diagnostic self-test.
- Start the prime mover and allow it to reach rated nominal speed and thermal stability under governor control.
- Enable the synchronizer to monitor the 2-phase generator and busbar voltages, frequencies, and phase relationships.
- Engage the automatic synchronizing mode, allowing the unit to issue precise analog speed and voltage bias adjustments, automatically closing the generator circuit breaker precisely at the synchronous point.
- Shutdown Sequence:
- Gradually transfer active electrical load away from the generator set back to the main utility grid or companion generators until unloaded.
- Open the main generator circuit breaker manually or via system command to isolate the generator electrically from the busbar.
- Initiate the standard prime mover cool-down cycle at idle speed for the required duration.
- Issue the stop command to shut down the engine or turbine completely.
- De-energize the auxiliary control power to the synchronization module only after the prime mover has come to a complete standstill.
Frequently Asked Questions (Q&A)
- Q1: What measuring and display inputs does the WOODWARD 5448-894 support?
- A1: The module features 2-phase generator voltage and 2-phase busbar voltage measuring and display capabilities.
- Q2: What type of bias output signals does this specific part number utilize?
- A2: The 5448-894 model is equipped with analog bias signals for frequency and voltage matching control.
- Q3: Does this model include built-in protection features?
- A3: Yes, this model comes equipped with optional mains failure recognition and generator protection capabilities.
