WOODWARD 8406-114 | ProTech-G High-Speed Overspeed Protection Device

Description

• The WOODWARD 8406-114 is a critical safety component within the ProTech-G series, designed specifically for high-speed overspeed protection of industrial turbines and engines. This digital sensing and protection device acts as the final line of defense against catastrophic mechanical failure by monitoring rotational speed with extreme precision. It is engineered to detect overspeed conditions and initiate a safety trip signal in milliseconds, ensuring the security of both personnel and expensive rotating machinery in power and process industries.
  

  Technical Specifications (Datasheet)

  Model Identification: 8406-114 Manufacturer: Woodward Product Class: ProTech-G / Overspeed Protection Input Power: 18-32 VDC Magnetic Pickup Inputs: 2-3 High-speed MPU inputs Response Time: Less than 40 milliseconds Dimensions: 17.5 cm x 12.0 cm x 8.5 cm Weight: 1.15 kg Country of Origin: USA

  Application Fields

  This protection module is mandatory in environments where rotating equipment must be monitored for safety compliance:

  • Steam Turbines: Providing independent emergency trip functions for power plant generators.
  • Gas Turbines: Protecting aero-derivative and industrial gas turbines from centrifugal overstress.
  • Mechanical Drives: Monitoring large industrial pumps and compressors in refineries.
  • Hydroelectric Power: Ensuring water turbines do not exceed structural speed limits during load rejection.

  Product Usage Instructions

  1. Mounting and Placement: Install the unit in a vibration-resistant control cabinet. Ensure adequate clearance for airflow to maintain the specified operating temperature range.
  2. Sensor Alignment: Connect high-quality Magnetic Pickups (MPU) to the input terminals. The gap between the sensor and the gear tooth must be precisely set to Woodward specifications to ensure a clean frequency signal.
  3. Relay Wiring: Wire the trip relay outputs to the emergency shutdown (ESD) solenoid or the fuel rack actuator. Use fail-safe wiring practices where the circuit opens to trip.
  4. Set-Point Configuration: Use the front-panel interface or Woodward service tools to program the overspeed trip level. This value should be set slightly above the maximum operating speed but below the mechanical limit.
  5. Functional Testing: Perform a “Dry Trip” test regularly. The 8406-114 allows for testing the internal logic and relay execution without actually overspeeding the physical turbine, ensuring the safety loop is intact.

  Frequently Asked Questions (Q&A)

  Q: Does the 8406-114 provide speed indication as well as protection? A: Yes, the unit typically features a digital display or analog output that provides real-time RPM data for monitoring while simultaneously performing its protection logic.

  Q: What happens if one Magnetic Pickup fails? A: Depending on the configuration (e.g., 2-out-of-3 logic), the ProTech-G can be set to alert the operator of a sensor failure while continuing to provide protection using the remaining healthy sensors.

  Q: Is this unit certified for safety-critical environments? A: Yes, Woodward ProTech series modules are designed to meet various international safety standards (such as SIL ratings) for use in hazardous and critical industrial locations.

  Q: How can I source a replacement or get technical support for this model? A: You can find technical documentation and availability for the WOODWARD 8406-114 by visiting https://www.newplcdcs.com for specialized industrial automation assistance.

  Similar Model Recommendations

  If you are expanding your protection system or looking for compatible Woodward safety hardware, consider these related models:

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