Description
Woodward’s ProTech 203 Model 8200-211 is a De-energize-to-Trip overspeed safety device designed to safely shut down steam, gas, and hydro turbines upon sensing an overspeed or overacceleration event. It consists of three independent speed-sensing units which continuously monitor prime mover speed and activate a trip relay when an overspeed condition is detected. Built inside a secure, lockable enclosure, this model features a 220 Vac input power supply and an integrated trip alarm to provide fail-safe protection and critical monitoring for industrial turbomachinery and large compressors.
📊 Technical Specifications & Datasheet Parameters
• Brand: Woodward
• Model: 8200-211
• Series: ProTech 203
• Product Name: Overspeed Protection Device
• Place of Origin: United States
• Operational Status: Active / Industrial Grade
• Dimensions: Approximately 400 mm × 350 mm × 200 mm (Enclosure mounted)
• Weight: Approximately 8.5 kg (18.7 lbs)
• Country of Origin: United States
• Power Consumption / Power: 220 Vac Input Power Supply (Max 60 W)
⚙️ Operation Standards & Usage Methods
Installation must strictly adhere to the manufacturer’s technical manual and be executed by qualified, certified control system engineers. The device should be mounted securely in a standard industrial control panel or rack enclosure rated for the appropriate NEMA/IP environment to shield internal electronics from excessive dust, moisture, and vibration. All field wiring, speed sensor connections (magnetic pickups or proximitors), and relay outputs must be shielded and properly grounded to eliminate electromagnetic interference (EMI). Configuration of trip limits, sensor types, and voting logic must be validated using the secure front-panel interface or configuration software before commissioning the turbine train.
🔌 Power-Up & Power-Down Sequence
Power-Up Sequence:
- Verify that all field wiring, speed sensors, and actuator trip circuits are correctly terminated and secure.
- Energize the 220 Vac input power supply feed to the unit.
- Observe the internal diagnostic LEDs and front display to confirm that all three independent speed-sensing units pass their self-test routines without faults.
- Verify that the system configuration parameters match the mechanical specifications of the turbine.
- Arm the trip output relays only when the machinery is ready for operation.
Power-Down Sequence:
- Ensure the turbine or controlled machinery has been safely brought to a complete standstill and is in a de-energized state.
- Disengage and lock out the trip output circuits to prevent accidental signals.
- Power down the 220 Vac supply inputs to the ProTech 211 unit.
- Wait for internal capacitors to fully discharge before performing any maintenance, module replacement, or inspection work.
❓ Frequently Asked Questions (Q&A)
Q: What does the De-energize-to-Trip configuration mean?
A: In a de-energize-to-trip system, the safety relay contacts are held energized during normal running conditions. If an overspeed event occurs or if power/component failure is detected, the relay de-energizes to initiate the shutdown sequence, providing an inherent fail-safe mechanism.
Q: What is the purpose of the lockable enclosure and trip alarm?
A: The lockable enclosure prevents unauthorized tampering with critical overspeed trip settings, while the integrated trip alarm provides immediate audible or visual notification to operators whenever a trip condition is triggered.
Q: What types of speed sensors are compatible with this device?
A: The unit accepts inputs from standard passive magnetic pickups (MPUs) and active proximity probes commonly used on industrial rotating machinery.
🚀 Recommended Woodward Models
- Woodward 8200-203 (ProTech 203 Standard Configuration)
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- Woodward 8200-221 (505E Export and Extraction Turbine Controller)
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- Woodward 9907-018 (2301A Microprocessor-Based Control)
- Woodward 8404-204 (723PLUS Digital Governor)
- Woodward 8237-1501 (ProTech TPS Overspeed System)
