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9905-872 Woodward De-energize-to-Trip Unit ProTech 203 Overspeed Protection

9905-872 Woodward De-energize-to-Trip Unit ProTech 203 Overspeed Protection

Manufacturers ：Woodward
Model(s)  ：9905-872
Additional Information ：De-energize-to-Trip Unit ProTech 203 Overspeed Protection
Estimated Shipping Size
Dimensions: 263 × 58 × 28mm
Weight:.4.3 kg
Country of Origin: United States of America

 

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Categories: , SKU: 9905-872

Description

Overview

Essential details：9905-872 Woodward De-energize-to-Trip Unit ProTech 203 Overspeed Protection

9905-872 Technical Specifications

Dimensions W482.6 x H310.4 x D142.7mm
Features MPU Failure Indication
Humidity Standards MIL-STD-810D, Method 507.2, Procedure II.
Input Voltage 120 Vac/dc (2), 220 Vac (1)
Keypad/Display (3) Keypads, Knobs, and Displays
Manual 85191
Manufacturer Woodward
Model De-energize-to-Trip
Operating Temperature –25 to +60 °C (–13 to +140 °F)
Weight 16lbs (7Kg)

Product Description

9905-874 is an overspeed protection system with three speed-sensing units that continually monitor and calculate prime mover speed. The three units are all enclosed in the same locked enclosure, which meets NEMA 4 and IP 65 standards. Each unit has its own power supply and operator interface. In model 9905-874, two of the three units have a 120 Vac/dc power supply, and the third unit has 220 Vac supply. The two 120 Vac/dc units have a voltage range of 88–132 Vac/90–150 Vdc, 7.25 W. The 220 Vac supply unit has a voltage range of 180–264 Vac, 7.25 W.

9905-8

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9905-872 Woodward De-energize-to-Trip Unit ProTech 203 Overspeed Protection

More specifications about model 8237-1595 include;

  • Online repair options.
  • Routine acceleration tests.
  • Speed readouts of 4 to 20 mA.

The routine tests are done by simulating an over acceleration event in each of the product’s three modules. This is done with an internal generator and frequency. The three different modules allow users to maintain one with the system is still online and running. The backplane structure makes replacing one of the modules easy, and straightforward. Model 8237-1595 has been discontinued by Woodward but can still be found in other places.

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