Description

The Bently Nevada 3300/20 Axial Position Monitor is a specialized rack-based module engineered for the 3300 Series monitoring system. It is primarily used to track axial shaft displacement, commonly referred to as thrust position, in critical rotating equipment such as industrial turbines, compressors, and pumps. By continuously monitoring the axial position, the module detects potential thrust bearing degradation or abnormal rotor shifts, triggering alarms to prevent catastrophic mechanical failure.

Features

• Designed for integration into the standard 3300 Series rack architecture.
• Processes dynamic signals from Proximitor sensors to determine shaft position.
• Features dual-level alarm setpoints (Alert and Danger) with corresponding relay outputs.
• Provides proportional 4-20 mA output signals for external integration with DCS or PLC systems.
• Front-panel LED indicators provide real-time status updates, including OK, Bypass, Alert, and Danger conditions.

Applications

This monitor is essential for machinery protection in power generation, oil and gas, and petrochemical facilities. It is specifically suited for monitoring thrust position in:

• Steam and gas turbines
• Centrifugal compressors
• Large industrial motors and generators
• High-speed rotating pumps

Technical Specifications

Installation Guidelines

• Ensure the 3300 rack is powered down before inserting or removing the monitor module to prevent electrical damage.
• Verify that the proximity probe signals are correctly routed through shielded cabling to minimize electromagnetic interference (EMI).
• Ensure proper grounding of the 3300 rack chassis to a clean earth ground to maintain signal integrity.
• Handle the module using standard ESD (Electrostatic Discharge) precautions.
• Confirm that the configuration options (XX) match the specific displacement range requirements of the monitored machine before commissioning.

FAQ

Does this module include intrinsic safety barriers?

No, the 00 suffix for the barrier option indicates that this specific configuration does not include internal intrinsic safety barriers. Ensure your installation environment meets the necessary safety requirements for non-intrinsically safe equipment.

What type of sensors are compatible with this monitor?

This module is configured for standard proximity probe inputs (Proximitor sensors). Ensure your transducer cabling and sensor calibration are compatible with the specific 3300/20 input requirements.