9905-753

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The Woodward series ProTech 9905-753 electronic two-out-of-three Overspeed Protection Systems. Features CPU and MPU Failure Indication.

AVAILABILITY:

CALL FOR AVAILABILITY

Contact: 1-919-372-8413 (Intl.), 1-800-991-7026 (US), sales@axcontrol.com

3 Year Warranty: Learn More

Sell Surplus: Have a 9905-753 to sell? Sell Now

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9905-753

    Varying star amount pictures Varying star amount pictures Varying star amount pictures Varying star amount pictures Varying star amount pictures
  • 5.00 (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
  • 5.00 (1)
  • Click a star to rate this product
The Woodward series ProTech 9905-753 electronic two-out-of-three Overspeed Protection Systems. Features CPU and MPU Failure Indication.

AVAILABILITY:

CALL FOR AVAILABILITY

Contact: 1-919-372-8413 (Intl.), 1-800-991-7026 (US), sales@axcontrol.com

3 Year Warranty: Learn More

Sell Surplus: Have a 9905-753 to sell? Sell Now

Exchange Credit: Learn more about our exchange credit program

9905-753 Technical Specifications

Dimensions W482.6mm x H310.4mm x D142.7mm
Features Hot Replacement
Input Voltage 120 Vac/dc and 220 Vac
Manual 85196
Manufacturer Woodward Governor
Model De-energize-to-Trip
Operating Temperature –25 to +60 °C (–13 to +140 °F)
Standards Adequate ventilation for cooling and space for servicing

Product Description

Product 9905-753 is a digital overspeed protection device. This is a de-energize-to-trip device that has three nearly identical speed-sensing units to monitor prime mover speed and activate a trip relay in the event of overspeed detection. The only difference among the units is that two of them have a 120 Vac/dc voltage input and the third unit has a 220 Vac voltage input. Each unit has its own power supply and the system can be configured for compatibility with various power sources.

 

The modular design of this system permits a number of functions preventing overall system failure or system downtime. The 9905-753 system has a two-out-of-three voting configuration based on three separate speed calculations. A built-in frequency generator makes it possible to test speed-sensing units one at a time while the prime mover is online. If any one of the three units trips, the other two will maintain normal operations. This also means that a single unit can be replaced without disrupting operations

 

A key switch is used to move between MONITOR and PROGRAM modes. The 9905-753 system will run while in either of these two modes however it should be left in MONITOR mode unless the units are actually being programmed. Tunable parameters are: MPU failed timeout, MPU gear teeth, MPU failed setpoint, trip speed setpoint, and trip on MPU failure.

 

Product 9905-753 has a functional status LED indicators and alarm outputs to alert operators of any errors within the system. Error codes and troubleshooting guidelines may be found online in Woodward ProTech 203 Overspeed Protection System Manual 85196.

Reviews For 9905-753
Internal Review

Immediately after a reset operation, an MPU Fail Timer starts. If the prime mover speed is not up to the value programmed when this timer times out, the device will trip the prime mover. Both the time and the speed are programmable. - AX Technician

Repair Services For 9905-753

Type Lead Time Price Action
Repair Service 1-2 weeks $5499

Our highly skilled technicians can repair your 9905-753. 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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9905-753 Manuals, White Papers, Data Sheets, and Troubleshooting