9905-752

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Woodward ProTech 203 Model 9905-752 with three identical, enclosed, independent, speed-sensing units for monitoring prime mover speed and activating trip relays

AVAILABILITY:

CALL FOR AVAILABILITY

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

3 Year Warranty: Learn More

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9905-752

    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
Woodward ProTech 203 Model 9905-752 with three identical, enclosed, independent, speed-sensing units for monitoring prime mover speed and activating trip relays

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 9905-752 to sell? Sell Now

Exchange Credit: Learn more about our exchange credit program

9905-752 Technical Specifications

Dimensions W19in x H12.244in x D5.62in
Features CPU Failure Indication
Input Voltage 24Vdc and 202Vac
Keypad/Display 12 keys and 1 knob per module
Manual 85196
Manufacturer Woodward
Model De-energize-to-Trip
Operating Temperature –25 to +60 °C (–13 to +140 °F)
Standards NEMA 4/4x, IP54

Product Description

This overspeed protection device is part of the Woodward ProTech 203 series. Model 9905-752 is a de-energize-to-trip model with two 24 Vdc input speed-sensing units and one 220 Vac input speed-sensing unit. The three units have separate power supplies, separate front panels, and separate LED functional status indicators, but are all contained in one locked, NEMA 4X certified enclosure.

 

Aside from the voltage input, the speed-sensing units in the Woodward 9905-752 system are identical. These units act independently to monitor prime mover speed and perform speed calculations. The three units in model 9905-752 are connected in a two-out-of-three voting configuration and activate a trip relay if an overspeed is detected.

 

If an overspeed is detected and it exceeds the previous peak speed, a new peak speed is recorded and stored in non-volatile memory. A tripped unit will remain tripped until power is cycled or the unit is reset, and all three units must be reset before starting the turbine.

 

Available features and functions in the 9905-752 device include remote reset, hot replacement, key lock for access to PROGRAM mode, built-in self-test, and an alarm output.

 

Both the LED indicators and the front panel LCD displays provide information if errors occur. A troubleshooting guide, as well as additional functions and product specs, are detailed in ProTech 203 manual 85196.

Reviews For 9905-752
Internal Review

Whenever two of the three speed-sensing circuits sense an overspeed condition, the voter relay configuration will change state, causing a turbine trip. It should be noted, however, that a single MPU or circuit failure will not cause an inadvertent trip. - AX Control Tech

Repair Services For 9905-752

Type Lead Time Price Action
Repair Service 1-2 weeks $5528

Our highly skilled technicians can repair your 9905-752. 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
Learn More

9905-752 Manuals, White Papers, Data Sheets, and Troubleshooting