The Bently Nevada 3300/48 Case Expansion Monitor is a specialized rack-based module engineered to track the thermal growth of turbine casings in relation to their mounting foundations. By monitoring this critical mechanical parameter, the module helps prevent structural interference and potential damage in large-scale rotating equipment, such as steam turbines, ensuring operational integrity through continuous real-time data acquisition and alarm processing.
Features
Provides precise measurement of casing expansion relative to the machine base.
Integrated alarm logic for Alert and Danger setpoints to facilitate predictive maintenance.
Front-panel LED status indicators for clear visual monitoring of OK, Bypass, Alert, and Danger states.
Configurable signal conditioning for compatibility with standard proximity probes or LVDT sensors.
Standardized relay outputs for immediate integration into existing plant trip and alarm systems.
Technical Specifications
Model
3300/48-01-01-00-00
Operating Temperature
0 to 60 deg C
Power Consumption
1.5 W (typical)
Input Compatibility
Proximity probes or LVDTs
Signal Accuracy
+/- 0.33% typical (+/- 1% max at 25 deg C)
Output Signals
+4 to +20 mA, +1 to +5 VDC, 0 to -10 VDC
Installation Guidelines
Ensure the 3300 rack is powered down before inserting or removing the monitor module to prevent electrical damage.
Verify that the module is fully seated in the rack slot to ensure reliable backplane communication.
Use shielded cabling for all sensor inputs to minimize electromagnetic interference (EMI) in industrial environments.
Maintain proper ventilation in the rack cabinet to keep ambient temperatures within the specified 0 to 60 deg C operating range.
Handle with standard ESD precautions; avoid touching the backplane connectors to prevent contamination or static discharge.
FAQ
What is the primary function of the 3300/48 module? The module measures the linear thermal expansion of large machinery casings, which is vital for preventing mechanical binding during machine start-up or operation.
Does this module require special configuration? The 3300/48-01-01-00-00 is a standard version; however, ensure your field sensors (LVDTs or proximity probes) match the input configuration settings defined in the module's setup documentation.
