Parameters
| Main Parameters | Value/Description |
|---|---|
| Product Model | 8237-1481 |
| Manufacturer | Woodward |
| Product Category | Configurable Overspeed Detection System |
| Input Voltage | 24 VDC nominal (18–32 VDC) |
| Speed Detection Range | 0–10,000 RPM |
| Detection Accuracy | ±0.1% |
| Response Time | <10 ms |
| Analog Inputs | 6 channels (4–20 mA) with 24 V loop supply |
| Communication | LINKnet (Woodward proprietary bus) |
| Relay Outputs | 2 SPDT relays |
| Operating Temperature | -40°C to +70°C |
| Storage Temperature | -40°C to +85°C |
| Protection Rating | IP54 |
| Dimensions | 170 × 105 × 32 mm |
| Weight | Approximately 4.3 kg |
| Certification | API 670/612 compliant |
Technical Principles and Innovative Values
Innovation Point 1: Three-Channel Independent Overspeed Detection Architecture. The 8237-1481 employs three independent detection channels that continuously compare measured speed against configured setpoints. This redundant architecture aligns with API 670 requirements for machinery protection systems, ensuring that a single sensor or channel fault does not compromise overspeed protection integrity. The voting logic can be configured for 2-out-of-3 or other schemes depending on application risk tolerance.
Innovation Point 2: Sub-10 Millisecond Response for High-Speed Machinery Protection. The 8237-1481 achieves a response time of less than 10 milliseconds from overspeed detection to relay output activation . For high-inertia turbine rotors, this speed of response is critical—every millisecond of delay translates to additional overspeed excursion and accumulated mechanical stress. The module’s fast detection path is purpose-built for emergency shutdown applications where latency directly impacts equipment survivability.
Innovation Point 3: Integrated Electrical Parameter Monitoring. Beyond simple speed detection, the 8237-1481 incorporates three-phase voltage and current monitoring capabilities . It tracks voltage, current, frequency, power, and power factor in real time, enabling comprehensive generator protection including over/under voltage, overcurrent, frequency anomalies, and loss-of-synchronism detection. This integration consolidates multiple protection functions into a single module, reducing cabinet space and wiring complexity.
Innovation Point 4: Native Integration with Woodward Control Platforms. The 8237-1481 communicates via Woodward’s LINKnet bus and is designed for seamless integration with the 721/723PLUS control platforms . This native compatibility enables online configuration, diagnostics, and hot-swap replacement without disrupting the broader control system—a significant advantage for continuous-process power generation applications where protection system availability is paramount.
