9905-990

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The ProTech 203 Overspeed Protection System 9905-990 digital Overspeed trip device for reading 3 MPUs, performing speed calculations, and actuating relay output.

AVAILABILITY:

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  • Part Number: 9905-990
  • SKU: 9905990WO
  • Manufacturer: Woodward
  • Series: ProTech 203 Overspeed Protection

9905-990

    Varying star amount pictures Varying star amount pictures Varying star amount pictures Varying star amount pictures Varying star amount pictures
  • 4.00 (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
  • 4.00 (1)
  • Click a star to rate this product
The ProTech 203 Overspeed Protection System 9905-990 digital Overspeed trip device for reading 3 MPUs, performing speed calculations, and actuating relay output.

AVAILABILITY:

CALL FOR AVAILABILITY

3 Year Warranty: Learn More
Sell Surplus: Have a 9905-990 to sell? Sell Now
Exchange Credit: Learn more about our exchange credit program
  • Part Number: 9905-990
  • SKU: 9905990WO
  • Manufacturer: Woodward
  • Series: ProTech 203 Overspeed Protection

9905-990 Technical Specifications

Dimensions W19in x H12.244in x D5.62in
Display Operating Temperature –15 to +60 °C (+5 to +140 °F)
Features CPU Failure Indication
Input Voltage 120 Vac/dc = 88–132 Vac/90–150Vdc, 7.25W
Manual Product Manual 85196
Manufacturer Woodward
Operating Temperature –25 to +60 °C (–13 to +140 °F)
Standards NEMA 4/4x, IP54
Weight Approx 14 lbs

Product Description

Model 9905-990 has several features that make it an efficient choice of overspeed protection device. These three units, A, B, and C are identical speed-sensing units that can be tested or even replaced individually. ProTech model 9905-990 uses a two-out-of-three hardware voting configuration, so the overall system can remain in operation with at least two units online.

 

Prior to the hardware voting relay, the three units act independently to monitor prime mover speed (sampled every 5 ms) using magnetic pickups (MPUs) and perform a speed calculation. A trip relay is activated if an overspeed condition is met. The total response time of this process is a maximum of 40 ms.

 

The 9905-990 device has a speed-sensing frequency range of 100 Hz to 32 kHz and a trip-point frequency range of 250 Hz to 25 kHz. This system has an accuracy rating of 0.05% of point + 2 Hz over the operating temperature and should be installed in a location where it is protected from things such as electromagnetic interference, and vibration and in a space where there is adequate ventilation for cooling.

Reviews For 9905-990
Internal Review

Each subsystem module of the 9905-990 unit can be replaced after disconnecting the supply power at the external disconnecting means while the other two subsystems are powered without tripping the prime mover. - AX Control Incorporated

Repair Services For 9905-990

Type Lead Time Price Action
Repair Service 1-2 weeks $4074

Our highly skilled technicians can repair your 9905-990. 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

9905-990 Manuals, White Papers, Data Sheets, and Troubleshooting