9907-146

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Energize-to-Trip 9907-146 Unit from Woodward ProTech 203 Series. Displays the actual speed from each speed probe and features online testing with a Lockable Enclosure

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  • Part Number: 9907-146
  • SKU: 9907146WO
  • Manufacturer: Woodward
  • Series: ProTech 203 Overspeed Protection

9907-146

    Varying star amount pictures Varying star amount pictures Varying star amount pictures Varying star amount pictures Varying star amount pictures
  • 4.00 (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
  • 4.00 (2)
  • Click a star to rate this product
Energize-to-Trip 9907-146 Unit from Woodward ProTech 203 Series. Displays the actual speed from each speed probe and features online testing with a Lockable Enclosure

AVAILABILITY:

CALL FOR AVAILABILITY

3 Year Warranty: Learn More
Sell Surplus: Have a 9907-146 to sell? Sell Now
Exchange Credit: Learn more about our exchange credit program
  • Part Number: 9907-146
  • SKU: 9907146WO
  • Manufacturer: Woodward
  • Series: ProTech 203 Overspeed Protection

9907-146 Technical Specifications

Dimensions W19in x H12.244in x D5.62in
Features MPU Fail Option and Timer
Input Voltage 24 Vdc = 18–32 Vdc, 5.12 W
Keypad/Display 12 keys, 1 knob, 1 display per module
Manual 85204
Manufacturer Woodward
Model Energize-to-Trip
NEMA Rating 4 and 4X for North America
Operating Temperature –25 to +60 °C (–13 to +140 °F)
Standards IP54 for Europe
Weight Between 13 and 17 lbs

Product Description

ProTech model 9907-146 has three speed-sensing units that act independently to monitor prime mover speed and perform speed calculations. Speed is monitored using magnetic pickups (MPUs). This overspeed protection device is susceptible to electromagnetic interference and must be installed in a location protected from high-voltage and high-current devices.

 

In a total response time of 40 ms or less, speed-sensing units A, B, and C sample prime mover speed perform independent speed calculations, then activate a trip relay if a two-out-of-three hardware vote determines overspeed conditions have been met.

 

The present speed of an individual unit is the default display on that unit’s operator interface LCD. Additional parameters can be viewed by cycling through using the keypad on the interface. The peak speed of each unit is updated each time the present speed exceeds the previously recorded peak speed during an overspeed condition. When this happens, the new peak speed is updated and stored in non-volatile memory.

 

9907-146 units are in a locked enclosure that is NEMA 4 and 4X certified (IP54 for Europe). A key lock prevents unauthorized personnel from accessing programming or testing functions.

 

Individual units can be tested or replaced without tripping the prime mover. The two-out-of-three-vote configuration permits two of the three units to maintain control of the system and provide accurate outputs. This is also made possible by each unit having its own 24 Vdc power supply.

 

Additional features of ProTech model 9907-146 are:

  • Remote reset
  • Alarm outputs
  • LED functional status indicator – separate LEDs for MPU failure, CPU failure, tripped unit
  • Built-in self-test
  • MPU Fail Timer

 

Woodward Manual 85204 (G) has complete details on each of these features, tunable parameters, and safety precautions for model 9907-146. Because this is an energize-to-trip overspeed protection model, a prime mover trip is not guaranteed to occur from loss of power.

Reviews For 9907-146
Internal Review

All shielded cables must be twisted conductor pairs with either a foil or a braided shield. All signal lines for the 9907-146 should be shielded to prevent picking up stray signals from adjacent equipment. - AX Control

Repair Services For 9907-146

Type Lead Time Price Action
Repair Service 1-2 weeks $4438

Our highly skilled technicians can repair your 9907-146. 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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