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Specifications and Ordering Information

Rotary Position Transducer - 12479 3300 XL Rotary Position Transducer (RPT)

Description

The 3300 XL Rotary Position Transducer (RPT) measures angular rotation. Its most common use is for measuring valve position on steam turbines. Valve position information is utilized to adjust inlet valves, determine operat- ing efficiency and measure the load of the turbine.The 3300 XL RPT attaches to the end of a steam valve control shaft using a flexible coupling (not provided). The 3300 XL Rotary Position Transducer consists of a housing, cylinder and shaft, conduit fitting and a non-contacting eddy-current 3300 XL Proximity Transducer System. The 3300 XL probe views the precisely machined cylinder. As the steam turbine control valve opens or closes, the steam valve control shaft and the 3300 XL RPT cylinder rotate. This causes the gap voltage reading of the Proximity Transducer System to change. The change in the gap voltage is proportional to the change in valve opening.The 3300 XL RPT is available in three different rotational ranges to optimize its performance - 100 degrees, 200 degrees, or 300 degrees. It is compati- ble with Bently Nevada 3500/45 Position Monitors. The 3500/45 monitor and 3300 XL RPT utilize the advanced “Transducer OK” checking inherent in Bently Nevada eddy current proximity transducer measurements.

Specifications

Unless otherwise noted, the following specifications are for a 3300 XL Rotary Position Transducer (RPT) between +18 C and +27 C (+64 F to +80 F), with a -24 Vdc power supply and a 10 k load.

Electrical

Power: Requires -17.5 Vdc to -26 Vdc without barriers at 12 mA maximum consumption. Supply Sensitivity: Less than 2 mV change in output voltage per volt change in input voltage. Output resistance: 50
For Reference Only - See Document #146250Specifications and Ordering InformationPage 1 of 4