9905-871

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ProTech 203 Digital Overspeed Trip Device that senses prime mover speed through three magnetic pickups (MPUs). Woodward Model 9905-871

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  • Part Number: 9905-871
  • SKU: 9905871WO
  • Manufacturer: Woodward
  • Series: ProTech 203 Overspeed Protection

9905-871

    Varying star amount pictures Varying star amount pictures Varying star amount pictures Varying star amount pictures Varying star amount pictures
  • 4.50 (2)
  • 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
  • 4.50 (2)
  • Click a star to rate this product
ProTech 203 Digital Overspeed Trip Device that senses prime mover speed through three magnetic pickups (MPUs). Woodward Model 9905-871

AVAILABILITY:

CALL FOR AVAILABILITY

3 Year Warranty: Learn More
Sell Surplus: Have a 9905-871 to sell? Sell Now
Exchange Credit: Learn more about our exchange credit program
  • Part Number: 9905-871
  • SKU: 9905871WO
  • Manufacturer: Woodward
  • Series: ProTech 203 Overspeed Protection

9905-871 Technical Specifications

Dimensions W482.6mm x H310.4mm x D142.7mm
Display Operating Temperature –15 to +60 °C (+5 to +140 °F)
Features Remote Reset
Input Voltage 220 Vac = 180–264 Vac, 7.25W
Manual Woodward 85191
Model De-energize-to-Trip
Standards NEMA 4 and IP54
Weight 16 lbs (7 Kg)

Product Description

With the 9905-871, operators can be sure of their protection against overspeed conditions. The two-out-of-three vote configuration of this system will still provide an accurate output even if one of the three, identical speed-sensing units is offline. These hardware votes are achieved as each unit performs its own speed calculations while monitoring prime mover speed through its own magnetic pickup (MPU). A trip relay is activated when an overspeed condition is detected.

 

When an overspeed condition occurs, if the current speed is greater than the previous peak speed, the new peak speed is updated and stored in non-volatile memory. Both the peak speed as well as the current speed of any single speed-sensing unit can be viewed on the unit’s operator interface LCD.

 

Along with an LCD, the operator interface of each unit in the 9905-871 has a touchpad and several LEDs. These LEDs indicate the functional status of hardware and systems within the corresponding unit. Details on 9905-871 operations and troubleshooting can be found in Woodward’s ProTech 203 Overspeed Protection System Manual 85191 (version B).

 

9905-871 is a de-energize-to-trip model. All three of the speed-sensing units have their own 220 Vac power supplies, and a voltage range of 180–264 Vac, 7.25 W. Additional specs and product info on model 9905-871 can also be found in Manual 85191 (B).

Reviews For 9905-871
Internal Review

Each subsystem of the 9905-871 can be replaced (after disconnecting the supply power at the external disconnecting means) while the other two subsystems are powered without tripping the prime mover. - AX Control's Team of Techs

Repair Services For 9905-871

Type Lead Time Price Action
Repair Service 1-2 weeks $4927

Our highly skilled technicians can repair your 9905-871. 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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9905-871 Manuals, White Papers, Data Sheets, and Troubleshooting