The Bently Nevada 3300/48 Case Expansion Monitor is a specialized rack-mounted module engineered to track the thermal expansion of turbine casings relative to the machine foundation. This monitoring is essential for large rotating equipment, such as steam turbines, where monitoring casing growth is vital to prevent mechanical interference and ensure operational safety. The module provides continuous signal processing and compares real-time expansion data against user-defined alarm setpoints to facilitate predictive maintenance.
Features
Provides continuous measurement of casing expansion relative to the foundation.
Integrated alarm setpoint comparison for Alert and Danger conditions.
Supports input from proximity probes or LVDTs for flexible sensing configurations.
Features front-panel LED indicators for system status, including OK, Bypass, Alert, and Danger.
Standard relay outputs for external alarm integration.
Technical Specifications
Model
3300/48-03-02-00-00
Brand
Bently Nevada
Series
3300
Operating Temperature
0 to 60 degC
Power Consumption
1.5 W (typical)
Sensitivity
200 mV/mil or 100 mV/mil (configurable)
Accuracy
+/- 0.33% typical; +/- 1% max at 25 degC
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.
The module must be installed in a clean, dry environment within the specified temperature range.
Use shielded cabling for all transducer inputs to minimize electromagnetic interference (EMI).
Verify that the module is fully seated in the rack backplane to ensure proper power and signal connectivity.
Follow standard ESD (Electrostatic Discharge) precautions when handling the module circuitry.
FAQ
What is the primary function of the 3300/48 module?
The 3300/48 is designed to monitor the thermal expansion of turbine casings relative to their foundation, helping to prevent mechanical interference during machine operation.
What types of sensors does this monitor support?
This model is configured to accept inputs from proximity probes or LVDTs (Linear Variable Differential Transformers) via Proximitor sensors.
How are alarm conditions indicated?
The module features front-panel LED indicators for OK, Bypass, Alert, and Danger statuses, and provides relay outputs for external alarm notification.
