9905-884

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Woodward Model 9905-884 ProTech 203 digital Overspeed trip device that senses prime mover speed through three magnetic pickups (MPUs).

AVAILABILITY:

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  • Part Number: 9905-884
  • SKU: 9905884WO
  • Manufacturer: Woodward
  • Series: ProTech 203 Overspeed Protection

9905-884

    Varying star amount pictures Varying star amount pictures Varying star amount pictures Varying star amount pictures Varying star amount pictures
  • 4.00 (1)
  • Click a star to rate this product
    Varying star amount pictures Varying star amount pictures Varying star amount pictures Varying star amount pictures Varying star amount pictures
  • 4.00 (1)
  • Click a star to rate this product
Woodward Model 9905-884 ProTech 203 digital Overspeed trip device that senses prime mover speed through three magnetic pickups (MPUs).

AVAILABILITY:

CALL FOR AVAILABILITY

3 Year Warranty: Learn More
Sell Surplus: Have a 9905-884 to sell? Sell Now
Exchange Credit: Learn more about our exchange credit program
  • Part Number: 9905-884
  • SKU: 9905884WO
  • Manufacturer: Woodward
  • Series: ProTech 203 Overspeed Protection

9905-884 Technical Specifications

Dimensions W482.6 x H310.4 x D142.7 (mm)
Features Built-In Self-Test
Input Voltage 24 Vdc = 18–32 Vdc, 7.25 W
Keypad/Display 3 Displays and Keypads
Manual 85191
Manufacturer Woodward Governor
Model Energize-to-Trip
Operating Temperature –25 to +60 °C
Weight Over 15 lbs

Product Description

Model 9905-884 uses magnetic pickups (MPUs) to sample prime mover speed every 5 ms and monitor for overspeed conditions. If conditions are met, it results in a trip relay. The 9905-884 system is one of the ProTech 203 series energize-to-trip models. Operators can enjoy peace of mind with the 0.1% (at 25 °C) accuracy rating and two-out-of-three voting configuration design of this system.

 

Speed-sensing units A, B, and C in models 9905-884 are identical. Each has an operator interface and a 24 Vdc power supply. System programming is done through the operator interface, which has an LCD and keypad. To prevent unauthorized changes, access to PROGRAM mode and the testing functions is restricted with a key switch. Each interface also has LED indicators and alarm output to alert operators when a tripped unit, MPU failure, CPU failure, and more.

 

Each of the three units must be reset before the turbine is started. Individual units must be reset after they trip (no reset is necessary if the power is cycled). Model 9905-884 has a remote reset feature, making this an easier process.

 

Present Speed and Peak Speed can both be viewed on a unit’s LCD. Peak Speed is updated each time an overspeed condition occurs if that speed exceeds the previously recorded peak speed. If the new peak speed is the result of an overspeed condition (as opposed to a test), it is stored in non-volatile memory.

 

A full list of the parameters that can be displayed on the LCD can be found in ProTech 203 Manual 85191 (version B). This manual also contains installation instructions and requirements and should be reviewed before installing models 9905-884. The enclosure for this model has optional stainless steel hubs. When these are used the enclosure meets NEMA 4X standards.

Reviews For 9905-884
Internal Review

Installations of the 9905-884 units with severe electromagnetic interference (EMI) may require shielded cable run in conduit, double-shielded wire, or other precautions. Please have a certified individual view the requirements within Woodward's Manuals. - AX Control Tech Team

Repair Services For 9905-884

Type Lead Time Price Action
Repair Service 1-2 weeks $5564

Our highly skilled technicians can repair your 9905-884. All of our repairs come with a 3 Year AX Control Warranty. Please contact us for additional information about our repair process. To receive the repair pricing and lead time listed above please process your repair order via our website. The following repair options may be available upon request:

  • 48-72hr Rush Repair
  • Detailed Repair Reports
  • AX Control Certificate of Warranty

AX Control Warranty Info

All products we sell are backed by our unparalleled warranty. A warranty certificate will be provided with your order upon request.
All PLCs, HMIs, and Turbine Control Boards: 3 Years
All AC/DC and Servo Drives: 2 Years
All Motors: 1 Year
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9905-884 Manuals, White Papers, Data Sheets, and Troubleshooting