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Product Introduction
The Woodward 9907-147 ProTech 203 Overspeed Protection Device is a critical safety device engineered to detect and react to unsafe turbine or engine speeds. Designed for prime movers such as steam, gas, and hydro turbines, the ProTech 203 ensures rapid shutdown during overspeed events, thus preventing catastrophic mechanical damage and ensuring operational safety.
This triple-redundant, independently powered protection system uses three-speed sensing units and logic processors to monitor input signals, evaluate overspeed conditions, and activate a shutdown command in milliseconds. The ProTech 203 series is compliant with industry safety and redundancy requirements, including API 612, API 670, and IEC standards, making it a trusted solution in mission-critical environments.
Product Specifications
| Parameter | Specification |
|---|---|
| Product Name | Woodward ProTech 203 ProTech 203 Overspeed Protection Device |
| Model Number | 9907-147 |
| Function | Overspeed detection and shutdown actuation |
| Speed Input Range | 0–25,000 Hz (typical magnetic pickup) |
| Trip Setpoint | Configurable via keypad and display |
| Number of Inputs | 3 (redundant independent speed channels) |
| Power Supply | 18–32 V DC (each of 3 independent power supplies) |
| Relay Outputs | 3 shutdown relays, 3 alarm relays |
| Response Time | < 40 ms (typical trip time) |
| Display | LCD screen with keypad interface |
| Mounting Style | Panel-mounted (rack or enclosure) |
| Operating Temperature | -25°C to +60°C |
| Humidity | 5% to 95% RH, non-condensing |
| Ingress Protection | IP20 (internal use) |
| Certifications | CE, UL/cUL, CSA, ATEX (varies by version) |
| Dimensions (W × H × D) | 432 mm × 177 mm × 250 mm |
| Weight | 1.81 kg |
Product Applications
The Woodward 9907-147 ProTech 203 is widely used in applications where overspeed events pose serious risks to equipment and personnel. Common applications include:
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Steam Turbines: Primary overspeed shutdown for industrial and utility-scale turbines
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Gas Turbines: Backup protection for fast-spinning rotor assemblies
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Hydro Turbines: Monitoring variable-speed generators for overspeed events
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Compressors and Pumps: Preventing mechanical overrun in high-speed rotating machinery
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Industrial Engines: Overspeed protection for large reciprocating engines in plants
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Critical Process Equipment: Compliance with safety standards like API 612, 670, and SIL
Product Advantages
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Triple-Redundant Safety Architecture
Uses three independent speed-sensing and decision-making channels for maximum reliability. -
Fast Response Time
Shuts down turbines in under 40 milliseconds during overspeed detection. -
User-Friendly Configuration
LCD screen and keypad interface allow for on-site configuration, diagnostics, and event logging. -
Robust System Compatibility
Compatible with magnetic pickups and various power supplies; integrates easily into turbine control panels. -
Flexible Relay Output Options
Configurable for shutdown, alarm, and system status reporting. -
Global Safety Compliance
Designed to meet stringent international safety and reliability standards including CE, UL, and API.
Frequently Asked Questions (FAQ)
-
What does the ProTech 203 model 9907-147 protect against?
It protects turbines and engines from overspeed conditions by rapidly initiating a shutdown. -
How many speed input channels does it use?
The unit uses three independent speed input channels for redundancy. -
What type of speed sensor can it interface with?
It typically connects to magnetic pickups generating signals up to 25,000 Hz. -
How is the trip setpoint configured?
Via the built-in keypad and LCD interface, allowing secure on-site adjustments. -
What is the typical shutdown response time?
Less than 40 milliseconds from overspeed detection to relay actuation. -
Can this module operate with redundant power supplies?
Yes, it supports three independent power supply inputs for maximum uptime. -
Is the 9907-147 compliant with API and SIL requirements?
Yes, it is designed to meet API 612, API 670, and IEC functional safety standards. -
Where is this device typically mounted?
It is usually panel- or rack-mounted in control rooms or turbine enclosures. -
Does the system include diagnostic features?
Yes, it includes real-time diagnostics, event logging, and system status indicators. -
Is this system suitable for use in hazardous environments?
Certain versions are ATEX certified for use in explosive or hazardous areas.
Recommended Related Models (Same Series or Functional Alternatives)
| Model | Model Number | Description |
|---|---|---|
| Woodward ProTech 203 | 9907-167 | Rack-mounted variant with similar functionality |
| Woodward ProTech 203 | 9907-172 | With HMI extension and wider input support |
| Woodward ProTech 203 | 9907-145 | Compact model, trip-only version |
| Woodward ProTech GII | 8200-1300 | Enhanced overspeed detection with Modbus |
| Woodward ProTech SX | 8200-1350 | Next-gen ProTech with advanced diagnostics |
| Woodward ProTech GII+ | 8200-1500 | Triple modular redundancy and SIL-3 certification |
Recommended Popular Woodward Models
| Model | Model Number | Application |
|---|---|---|
| Woodward 505XT | 9907-202 | Steam turbine controller with HMI |
| Woodward 2301D | 8200-1304 | Digital speed/load control for engines/turbines |
| Woodward EasyGen 3500 | 8440-2085 | Generator control with paralleling and load share |
| Woodward 723 Plus | 8440-2080 | High-performance digital engine controller |
| Woodward UG-25+ | 8273-124 | Mechanical-hydraulic governor with electronic assist |
| Woodward CPC-II | 9907-1200 | Current to pressure converter for valve control |
