Description
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 foundation. This monitoring is essential for steam turbines and heavy rotating equipment, where excessive or uneven casing expansion can lead to critical mechanical interference and hardware damage. By continuously monitoring expansion metrics against pre-configured alarm thresholds, this module provides the necessary data for predictive maintenance and operational safety.
Features
- Designed for the 3300 monitoring system architecture.
- Supports proximity probe and LVDT input configurations for versatile sensing.
- Provides continuous signal processing with integrated Alert and Danger alarm setpoints.
- Includes front-panel LED indicators for quick visual verification of OK, Bypass, Alert, and Danger status.
- Standard relay outputs for direct integration with plant trip and alarm systems.
- Standard input barrier configuration for reliable signal processing.
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 probe or LVDT via Proximitor sensors |
| Signal Accuracy |
+/- 0.33% (typical) 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 module to prevent electrical damage.
- Verify that the module is fully seated in the rack slot to ensure proper backplane connection.
- Use shielded cabling for all transducer inputs to minimize electromagnetic interference (EMI) in industrial environments.
- Maintain proper ventilation in the cabinet to ensure the module operates within the 0 to 60 deg C temperature range.
- Follow standard ESD (Electrostatic Discharge) precautions when handling the module to protect internal components.
FAQ
What is the primary function of the 3300/48 module?
The 3300/48 is designed to measure the thermal expansion of turbine casings relative to the machine foundation, helping to identify potential mechanical issues before they cause damage.
What types of sensors can be connected to this monitor?
This specific model (3300/48-01-01-00-00) is configured to accept inputs from proximity probes or Linear Variable Differential Transformers (LVDTs).
Does this module provide alarm outputs?
Yes, it features standard relay outputs that trigger based on programmed Alert and Danger setpoints to support plant protection systems.
