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9905-751 Woodward ProTech 203 Model

9905-751 Woodward ProTech 203 Model

Manufacturers ：Woodward
Model(s)  ：9905-751
Additional Information ：ProTech 203 Model
Estimated Shipping Size
Dimensions: 263 × 58 × 28mm
Weight:.4.3 kg
Country of Origin: United States of America

 

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Categories: , SKU: 9905-751

Description

Overview

Essential details：9905-751 Woodward ProTech 203 Model

9905-751 Technical Specifications

Dimensions W482.6 x H310.4 x D142.7 (with knobs and key)
Display Operating Temperature –15 to +60 °C (+5 to +140 °F)
Features MPU Fail Indication
Input Voltage 24 Vdc and 120 Vac/dc
Manual 85196
Manufacturer Woodward
Model De-energize-to-Trip
Operating Temperature –25 to +60 °C (–13 to +140 °F)
Standards Adequate ventilation for cooling
Trip-Point Frequency Range 250 Hz to 25 kHz
Weight Less than 17 lbs

Product Description

Manufactured by Woodward in the company’s ProTech 203 series of overspeed protection devices, 9905-751 is a de-energize-to-trip model. This device uses three speed-sensing units, each interfaced with a separate magnetic pickup (MPU), to monitor prime mover speed. These nearly identical units are configured for a hardware two-out-of-three vote. Prime mover speed is sampled every 5 ms, with a max system response time of 40 ms. Units A and B have 24Vdc input, while Unit C has 120 Vac/dc input.

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9905-751 Woodward ProTech 203 Model

The three speed-sensing units are in one, NEMA 4X certified enclosure, which is key locked. Programming of model 9905-751 is only accessible with key lock access. Tunable parameters and other programming specifications and instructions are in ProTech 203 Overspeed Protection System Manual 85196.

Each unit has its own front panel that includes:

  • Touchpad
  • Two-line by 16-character LCD display
  • Separate LED functional status indicator for a failed MPU/wiring, CPU operating outside of normal parameters, and a tripped unit

There are many conditions that might prompt one of the 9905-751 units to trip, such as the speed exceeding the trip setpoint, an MPU fail timeout, or no reset before re-starting the turbine. Troubleshooting details for these and other conditions can be found in the product manual.

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