Features:
- Interface Between the 50 mm Probe and 3300 XL Monitoring System
- Combines Capability of Eddy Current Signal Conditioning with Extended Linear Range Measurement
- Operates in Conjunction with the 3300 XL 50 mm Probe and Extension Cable
The 330878-91-05 operates as the 3300 XL 50 mm Proximitor Sensor in a 3300 XL transducer system, providing reliable signal conditioning for large steam turbine generator applications. It continuously processes eddy current signals from the 50 mm probe across a total system length of 9.0 meters (29.5 feet) and delivers precise position measurements through the monitoring system to support differential expansion (DE) and rotor expansion (RX) monitoring of all critical machinery components. Seamless integration with 3300 XL monitoring systems is standard with the 330878-91-05, however using complementary transducer configurations will allow extended measurement range up to 56 mm (2.2 inches) in the event of large axial displacement scenarios. The 330878-91-05 has made improvements in several areas over previous proximitor designs in addition to incorporating advanced RFI/EMI immunity within the 3300 XL product line.
The 330878-91-05 provides essential measurement functions critical to turbine protection systems, and is a vital component of the monitoring path, directly affecting the proper, normal operation of the overall machinery protection system. One 330878-91-05 proximitor sensor is required per transducer channel depending on the desired measurement configuration. The 330878-91-05 occupies a compact DIN-rail or panel mount installation and is always located in proximity to the monitored equipment (the dedicated sensor mounting position).
For Dual Complementary Measurement applications, the 3300 XL 50 mm System requires a second 330878-91-05 proximitor sensor installed with a probe observing the opposite side of the collar. In addition to standard single transducer operation, the complementary configuration also performs extended range measurement. The 3300 XL dual transducer configuration executes measurement using the internal circuitry specified in the proximitor options. Using this method, the complementary measurement system continually monitors the position of the rotor relative to the stator. If the system detects that the differential expansion is approaching critical limits (outside configured measurement ranges), it will automatically trigger alarms and place an event in the System Event List.
The 330878-91-05 Bently Nevada 3300 XL 50 mm Proximitor Sensor may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Bently Nevada 330878-91-05 3300 XL 50 mm Proximitor Sensor Manuals,Datasheets,Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Bently Nevada 330878-91-05 3300 XL 50 mm Proximitor Sensor Specs
General
- Manufacturer Bently Nevada
- Model 330878-91-05
- Condition New Original ready stock
- Product Family 330878-50-00,330878-51-05,330878-90-05
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
- Differential Expansion (DE): Its primary application is measuring the growth rate difference between a turbine rotor and its stator.
- Large Steam Turbine Generators: Ideal for monitoring rotor expansion in large-scale machinery due to its extended linear range.
- Harsh Environments: Specifically designed to survive the high-temperature and high-moisture environments typical of steam turbine DE monitoring.
- Electrical Safety: Complies with the European CE mark for electromagnetic compatibility.
- The "-05" suffix in the part number indicates Multiple Approvals for hazardous areas.
- North America: Certified by the Canadian Standards Association (CSA) for Class I, Division 1 and 2 locations.
- Europe: Certified by Baseefa for ATEX Zone 0 (Ex ia IIC T4/T5) and Zone 2 (Ex nA II T4/T5).
- Functional Safety: Part of a system capable of achieving SIL 2 (random capability) and SIL 3 (systematic capability) according to IEC 61508.
- Extended Linear Range: Offers the longest linear range in the Bently Nevada eddy current line at 27.9 mm (1100 mils).
- Temperature Stability: Maintains accuracy in continuous temperatures up to 200°C (392°F) and intermittent exposure up to 250°C (482°F).
- RFI/EMI Immunity: Enhanced resistance to radio frequency and electromagnetic interference allows installation in non-metallic housings without signal degradation.
- System Interchangeability: Designed for complete interchangeability between probes and cables without requiring individual component bench calibration.