Description
The Bently Nevada 3300/48 Case Expansion Monitor is a specialized rack-based module engineered to track the thermal growth of turbine casings relative to their mounting foundation. By monitoring this critical mechanical parameter, the module helps prevent damage caused by thermal expansion interference in steam turbines and large-scale rotating equipment. It provides real-time data processing and alarm logic to support predictive maintenance strategies.
Features
- Continuously monitors casing growth to ensure mechanical integrity during thermal cycles.
- Compatible with standard proximity probe or LVDT (Linear Variable Differential Transformer) inputs.
- Provides dedicated Alert and Danger relay outputs for process safety.
- Includes front-panel LED indicators for quick visual status checks of OK, Bypass, Alert, and Danger states.
- Integrates seamlessly into the Bently Nevada 3300 series rack environment.
Technical Specifications
| Model |
3300/48-03-02-00-00 |
| Operating Temperature |
0 to 60 degC |
| Power Consumption |
1.5 W (typical) |
| Signal Conditioning Accuracy |
±0.33% (typical), ±1% (max) at 25 degC |
| Output Options |
4-20 mA, 1-5 VDC, 0 to -10 VDC |
| Sensitivity |
200 mV/mil or 100 mV/mil (configurable) |
Installation Guidelines
- Ensure the 3300 rack is powered down before inserting or removing the module to prevent electrical damage.
- Verify that all signal wiring is properly shielded to minimize EMI influence on low-voltage transducer signals.
- Maintain proper grounding practices for the 3300 rack system to ensure signal integrity.
- Ensure adequate airflow and rack ventilation to keep the operating environment within the 0 to 60 degC range.
- Confirm transducer calibration settings match the configured sensitivity (100 or 200 mV/mil) during commissioning.
FAQ
What is the primary function of the 3300/48 monitor?
This module tracks the relative thermal expansion of a turbine casing compared to its foundation, providing essential data to prevent mechanical interference during operation.
Does this module require special certifications?
The 02 option code indicates a standard version without specific hazardous area certifications. Always verify your site requirements against the unit's nameplate before installation.
What types of sensors can be connected to this monitor?
The module is designed to accept inputs from proximity probes or LVDTs, allowing for flexible configuration based on the specific mechanical measurement requirements of your machinery.
