9905-979

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Woodward ProTech 203 Model 9905-979 with three identical, enclosed, independent, speed-sensing units for monitoring prime mover speed and activating trip relays

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  • Part Number: 9905-979
  • SKU: 9905979WO
  • Manufacturer: Woodward
  • Series: ProTech 203 Overspeed Protection

9905-979

    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
Woodward ProTech 203 Model 9905-979 with three identical, enclosed, independent, speed-sensing units for monitoring prime mover speed and activating trip relays

AVAILABILITY:

CALL FOR AVAILABILITY

3 Year Warranty: Learn More
Sell Surplus: Have a 9905-979 to sell? Sell Now
Exchange Credit: Learn more about our exchange credit program
  • Part Number: 9905-979
  • SKU: 9905979WO
  • Manufacturer: Woodward
  • Series: ProTech 203 Overspeed Protection

9905-979 Technical Specifications

Dimensions W482.6mm x H310.4mm x D142.7mm
Display Operating Temperature –15 to +60 °C (+5 to +140 °F)
Features Hot Replacement
Input Voltage 120 Vac/dc = 88–132 Vac, 90–150Vdc, 7.25W
Keypad/Display 12 Keys and 1 LCD per module
Manual 85195
Manufacturer Woodward
Model De-energize-to-Trip
Operating Temperature –25 to +60 °C (–13 to +140 °F)

Product Description

Part 9905-979 is an overspeed protection device with an accuracy rating of 0.05% of point + 2 Hz over the operating temperature range. This is a de-energize-to-trip system that continually monitors prime mover speed using three magnetic pickups (MPUs). Whether or not the system activates a trip relay is based on three separate calculations which are put to a hardware two-out-of-three vote. These calculations are performed by three identical speed-sensing units.

 

This part was manufactured by Woodward as part of the company’s ProTech 203 Overspeed Protection System series. Devices in this series are available in several power source options. 9905-979 is a 120 Vac/dc model; all three units have their own 120 Vac/dc power supply.

 

The design of this system, including the individual power supplies, permits the prime mover to remain online in situations such as:

  • The testing of individual speed-sensing units
  • Replacement of an individual unit
  • One unit is offline due to a trip relay

 

Even though the units are in a modular manner, they are all kept in the same enclosure. This enclosure meets IP 65 / NEMA 4 standards. It is locked to prevent unauthorized access to PROGRAM mode and unit testing functions. More information on programming is in ProTech 203 manual 85195.

Reviews For 9905-979
Internal Review

Check for correct wiring according to the plant wiring diagram. Check for broken terminals or loose terminal screws. Ensure that all ribbon cables are fully seated and clamped in place. We have had multiple complaints about these areas being too fragile or not seating properly. - AX Control Inc. Tech Team

Repair Services For 9905-979

Type Lead Time Price Action
Repair Service 1-2 weeks $4312

Our highly skilled technicians can repair your 9905-979. 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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9905-979 Manuals, White Papers, Data Sheets, and Troubleshooting