9905-877

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Energize-to-Trip Model 9905-877 from Woodward ProTech 203 Overspeed Protection. 220Vac Input, Lockable Enclosure, and a Trip Alarm

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  • Part Number: 9905-877
  • SKU: 9905877WO
  • Manufacturer: Woodward
  • Series: ProTech 203 Overspeed Protection

9905-877

    Varying star amount pictures Varying star amount pictures Varying star amount pictures Varying star amount pictures Varying star amount pictures
  • 5.00 (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
  • 5.00 (2)
  • Click a star to rate this product
Energize-to-Trip Model 9905-877 from Woodward ProTech 203 Overspeed Protection. 220Vac Input, Lockable Enclosure, and a Trip Alarm

AVAILABILITY:

CALL FOR AVAILABILITY

3 Year Warranty: Learn More
Sell Surplus: Have a 9905-877 to sell? Sell Now
Exchange Credit: Learn more about our exchange credit program
  • Part Number: 9905-877
  • SKU: 9905877WO
  • Manufacturer: Woodward
  • Series: ProTech 203 Overspeed Protection

9905-877 Technical Specifications

Dimensions W482.6mm x H310.4mm x D142.7mm (with knobs and key)
Display Operating Temperature –15 to +60 °C
Features Built-In Self-Test
Input Voltage 220 Vac = 180–264 Vac, 7.25W
Keypad/Display 1 Keypad, Knob, Display per Module
Manual User Manual 85191
Manufacturer Woodward
Model Energize-to-Trip
Operating Temperature –25 to +60 °C
Vibration Standards US MIL-STD-810D, Method 516.3, Procedure I

Product Description

This overspeed protection device continually monitors for overspeed conditions by using three magnetic pickups (MPUs) interfaced with three individual speed-sensing units, which each perform its own speed calculation. When overspeed conditions are detected after a two-out-of-three vote, a trip relay is activated. Model 9905-877 is an energize-to-trip system.

Features of this model include remote reset, alarm output, built-in self-test, and a locked enclosure.

 

The locked enclosure of model 9905-877 ensures no unauthorized changes are made to the systems programming and no unauthorized testing is performed, as key access is required to switch between MONITOR and PROGRAM modes. The 9905-877 enclosure meets NEMA 4 / IP 65 standards.

 

Speed-sensing units may be tested or replaced one at a time while the prime mover remains online. The 9905-877 system is designed in a way that an accurate output can be maintained with only two of the three units. If one of the units does trip, it needs to be reset or have the power cycled before it can be brought back online.

 

A few things that might cause a trip are MPU failure or loss of signal, interlock failure, an overspeed test, or the unit simply was not reset before the turbine was re-started. If a unit trips, the trip will be indicated by an alarm output and an LED on that unit’s operator interface.

 

Information on installation, troubleshooting, and additional 9905-877 specs are in Woodward’s manual 85191 (version B).

Reviews For 9905-877
Internal Review

Check the 9905-877 for correct wiring according to the plant wiring diagram upon installation. Check for broken terminals or loose terminal screws. Ensure that all ribbon cables are fully seated and clamped in place. - AX Control Inc. Tech

Repair Services For 9905-877

Type Lead Time Price Action
Repair Service 1-2 weeks $4105

Our highly skilled technicians can repair your 9905-877. 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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9905-877 Manuals, White Papers, Data Sheets, and Troubleshooting