Description

The Bently Nevada 3300/55 Dual Velocity Monitor is a rack-mounted module engineered for the 3300 Monitoring System. It is designed to measure casing vibration velocity by interfacing with Velomitor piezo-velocity sensors. The module provides two independent channels of continuous vibration monitoring, comparing input signals against user-defined Alert and Danger setpoints to ensure the protection of critical rotating machinery such as turbines, compressors, motors, and pumps.

Features

• Dual-channel velocity monitoring for high-density rack configurations.
• Compatible with standard Velomitor piezo-velocity sensor inputs.
• Integrated alarm logic with Alert and Danger setpoints.
• Dual relay outputs for automated machinery protection and shutdown sequences.
• Proportional 4-20 mA output for integration with external PLC or DCS systems.
• Standardized 3300 series rack-mount form factor for seamless system integration.

Applications

This module is widely utilized in industrial environments for the continuous monitoring of casing vibration on rotating equipment. Typical applications include:

• Steam and gas turbines
• Centrifugal compressors and pumps
• Large electric motors and generators
• Fans and blowers in critical process loops

Technical Specifications

Installation Guidelines

• Ensure the 3300 rack system is powered down before inserting or removing the module to prevent electrical damage or system faults.
• Verify that the module is fully seated in the rack backplane to ensure proper communication and power distribution.
• Use shielded cabling for all sensor inputs to minimize electromagnetic interference (EMI) and signal noise.
• Ensure proper grounding of the 3300 rack chassis according to site-specific instrumentation grounding standards.
• Verify that the configuration jumpers and software setpoints match the specific sensor type and machine requirements before placing the system into service.

FAQ

What is the primary function of the 3300/55 module?

The 3300/55 is a dual-channel velocity monitor that processes signals from piezo-velocity sensors to provide continuous vibration monitoring and alarm relay actuation for rotating machinery protection.

Does this module include intrinsic safety barriers?

No, this specific order code (ending in -00 for the barrier option) does not include internal intrinsic safety barriers. Ensure your installation environment meets the requirements for non-intrinsically safe equipment or utilize external barriers if required.