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- Woodward
- 9907-147
- PROTECH 203 Overspeed Protection Device
- USA
- 485 x 310 x 125mm
- 5.44kg
- Xiamen, China
- New & In Stock
- T/T, PayPal, Western Union
- 1 Year
- 1-3 Working Days
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We have a 10-year logistics and express cooperation agreement, so our products can be shipped to any place in the world.
Brand new and original
Our products are imported in bulk from the place of origin. Because of the cooperative relationship, our products are all original and 100% new.
24-hour service
We provide 7*24 hours service to our customers. We will be there whenever you need us.
Price advantage
All our products are priced very favorably because we have our own warehouse and supply.
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Woodward 9907-147 PROTECH 203 Overspeed Protection Device
Product Introduction
The Woodward 9907-147 is part of the PROTECH 203 series, a high-integrity overspeed protection system designed specifically for rotating equipment such as steam turbines, gas turbines, and compressors. It provides a dedicated, independent safety layer that rapidly detects and reacts to overspeed events, helping to prevent catastrophic equipment failure.
This triple-redundant device features three separate speed-sensing channels with individual microprocessors, ensuring true fault-tolerant operation. Its programmable trip settings, high-speed response, and rugged design make it a trusted choice in safety-critical industrial environments. The 9907-147 complies with API 670 standards and supports SIL-rated safety applications.
Product Parameters
| Parameter | Specification |
|---|---|
| Model Number | 9907-147 |
| Series | PROTECH 203 |
| Dimensions (WxHxD) | 485 x 310 x 125 mm |
| Weight | 5.44 kg |
| Input Signal | 3x Speed Sensor Inputs (magnetic or proximity) |
| Response Time | < 5 ms |
| Trip Setpoint Range | 0–30,000 RPM |
| Outputs | 3x Relay Trip Contacts |
| Power Supply | 24 V DC / 110-240 V AC (configurable) |
| Operating Temperature | -25°C to +70°C |
| Mounting | Rack or Panel Mounting |
| Safety Compliance | SIL-3 capable / API 670 compliant |
| Display | LCD display with keypad |
| Communications | Modbus (optional) |
Product Applications
The Woodward 9907-147 PROTECH 203 is widely used in:
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Steam and Gas Turbines: Provides critical overspeed protection for mechanical drive and power generation turbines.
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Compressors and Pumps: Protects high-speed rotating equipment from mechanical damage due to speed anomalies.
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Power Generation Plants: Forms an essential part of the safety shutdown system for both base-load and peaking units.
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Petrochemical Facilities: Ensures reliable overspeed trip protection in critical process compressors and drivers.
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Industrial Engines: Integrated into control cabinets of high-horsepower industrial reciprocating engines or gas compressors.
Product Advantages
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Triple Modular Redundancy (TMR): Three completely independent channels ensure the highest reliability and fault detection.
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Extremely Fast Response: Response time under 5 milliseconds offers instant protection during critical events.
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Programmable Flexibility: Fully adjustable trip setpoints and delay timers to fit application-specific needs.
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Field-Proven Durability: Withstands vibration, temperature, and electrical noise in harsh plant environments.
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API 670 Compliance: Meets strict global safety and performance standards for rotating machinery protection.
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Modbus Connectivity (Optional): Enables communication with DCS or SCADA systems for status monitoring and integration.
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Graphical LCD Display: Provides real-time speed readings, diagnostics, and trip status at a glance.
Brand and Series Affiliation
The 9907-147 belongs to the PROTECH 203 series by Woodward, a global leader in industrial control and protection solutions. The PROTECH series is known for its high-performance, safety-rated overspeed and critical condition protection across the power and process industries.
Related Models in the PROTECH 203 Series
| Model | Speed Inputs | Output Type | Dimensions (mm) | Weight (kg) | Notes |
|---|---|---|---|---|---|
| 9907-145 | 3x Inputs | Relay Outputs | 485 x 310 x 125 | 5.40 | Standard 24V DC input |
| 9907-146 | 3x Inputs | Dual Redundant | 485 x 310 x 125 | 5.42 | With dual power supply |
| 9907-148 | 3x Inputs | Solid State Outputs | 485 x 310 x 125 | 5.43 | For faster solid-state tripping |
| 9907-149 | 3x Inputs | HART Enabled | 485 x 310 x 125 | 5.44 | Includes advanced communication |
| 9907-150 | 3x Inputs | Modbus + Relays | 485 x 310 x 125 | 5.44 | Supports remote monitoring |
Popular Woodward Models
| Model Number | Description | Control Function | Power Supply | Typical Application |
|---|---|---|---|---|
| 9907-004 | Speed sensing & control module | Single-redundant control | 24 V DC | Turbine and engine overspeed protection |
| 9907-005 | Speed sensing & control module | Dual-redundant control | 24 V DC | High-reliability trip systems |
| 9907-014 | Overspeed protection unit | Triple-redundant logic | 24–32 V DC | Critical machinery protection |
| 9907-016 | Digital speed monitoring module | Single-channel monitoring | 24 V DC | Generator speed detection |
| 9907-020 | Emergency shutdown controller | Triple-redundant logic | 24 V DC | Safety shutdown for rotating equipment |
FAQ (Q&A Format)
Q1: What is the main function of the 9907-147 PROTECH 203?
A1: It monitors rotational speed and initiates a protective shutdown if overspeed conditions are detected.
Q2: How many speed input channels does it support?
A2: It supports three independent speed sensor inputs for triple redundancy.
Q3: What is the typical response time?
A3: The response time is under 5 milliseconds for high-speed protection.
Q4: Can it be used in high-vibration environments?
A4: Yes, it is built to operate reliably in tough industrial environments with vibration and EMI.
Q5: What is the input power requirement?
A5: It accepts either 24 V DC or 110–240 V AC, depending on configuration.
Q6: Does it support remote communication?
A6: Optional Modbus support allows integration with SCADA/DCS systems.
Q7: Is the device SIL-rated?
A7: Yes, the 9907-147 is SIL-3 capable and API 670 compliant.
Q8: Can it be mounted in standard panels?
A8: Yes, it is designed for rack or panel mounting.
Q9: What kind of outputs does it offer?
A9: It includes three fail-safe relay outputs for trip actuation.
Q10: Is local monitoring possible?
A10: Yes, the front panel LCD displays speed, status, diagnostics, and trip logs.
Authenticity guarantee
All product specifications are original and authentic imported products. We have an annual sales volume of 300 million yuan, and we only produce original and authentic products. All customers who cooperate with us directly online can enjoy low discounts.
Free warehouse
We have a complete range of product models, 80% of conventional models are in stock, and we have established channels in Asia, Africa, North America, South America, and Europe, effectively shortening the order processing time and satisfying customers in a timely manner.
Technical Team
Fast delivery. Spot goods can be shipped on the same day, and the delivery time transaction is 20% faster than that of peers on average, with a delivery time accuracy rate of 99%.
Thoughtful after-sales service
24-hour after-sales service guarantee team, professional and standardized management service system.