The Bently Nevada 3300/48 Case Expansion Monitor is a specialized rack-mounted module engineered to track the thermal growth of turbine casings in relation to the machine foundation. By monitoring this expansion, the system prevents mechanical interference, which is vital for the integrity of large rotating machinery, including steam turbines. This module performs continuous signal processing and provides real-time comparisons against user-configured alarm setpoints, facilitating proactive maintenance and operational safety.

Features

• Designed for precise monitoring of casing expansion using proximity probes or LVDT inputs.
• Provides integrated Alert and Danger alarm logic for machinery protection.
• Features front-panel LED status indicators for OK, Bypass, Alert, and Danger states.
• Standard relay outputs for direct integration into plant protection systems.
• Compatible with the Bently Nevada 3300 series rack architecture.

Applications

This module is primarily deployed in power generation and heavy industrial facilities where large-scale rotating equipment requires thermal growth monitoring. It is essential for protecting turbines and compressors during startup, shutdown, and steady-state operation.

Technical Specifications

Installation Guidelines

• Ensure the 3300 rack is powered down before inserting or removing any module to prevent electrical damage.
• Verify that the module is properly seated in the rack slot to ensure backplane connectivity.
• Maintain proper ventilation in the cabinet to keep ambient temperatures within the 0 to 60 deg C range.
• Use shielded cabling for all transducer inputs to minimize electromagnetic interference (EMI).
• Follow standard ESD (Electrostatic Discharge) handling procedures when touching internal components.

FAQ

Does this module support custom alarm setpoints?

Yes, the 3300/48 monitor allows for configurable alarm setpoints for both Alert and Danger levels, which are processed based on the input signal from your displacement transducers.

What is the primary input type for this model?

The 3300/48-01-01-00-00 is configured for compatibility with standard proximity probes or LVDT sensors, ensuring accurate measurement of linear expansion.