Description

The Bently Nevada 3300/55 Dual Velocity Monitor is a core component of the 3300 Series machinery protection system. This module is engineered to monitor casing vibration velocity by interfacing with Velomitor piezo-velocity sensors. It provides two independent channels of continuous monitoring, comparing real-time vibration data against pre-configured alarm setpoints to ensure the integrity of critical rotating machinery such as turbines, compressors, motors, and pumps.

Features

• Dual independent velocity monitoring channels.
• Compatible with standard Velomitor piezo-velocity sensor inputs.
• Integrated alarm and trip relay logic for machinery protection.
• Proportional 4-20 mA output for integration with external DCS or PLC systems.
• Enhanced diagnostic capabilities for continuous health monitoring of the measurement loop.

Applications

This module is designed for use in industrial environments where casing vibration monitoring is critical for asset protection. Typical applications include:

• Steam and gas turbine vibration monitoring.
• Centrifugal and reciprocating compressor protection.
• Large motor and pump casing vibration analysis.
• General-purpose rotating equipment in power generation and petrochemical facilities.

Technical Specifications

Installation Guidelines

• Ensure the 3300 rack system is properly grounded before installing the module.
• Handle the module using standard ESD (Electrostatic Discharge) protection practices.
• Verify that the rack power is disconnected before inserting or removing the module to prevent electrical damage.
• Ensure all field wiring for sensors and relay outputs is shielded and routed away from high-voltage AC lines to minimize EMI interference.
• Confirm that the configuration switches and jumpers match the specific requirements of the sensor and alarm logic before commissioning.

FAQ

What sensors are compatible with the 3300/55 module?

This specific model is configured for use with Bently Nevada Velomitor piezo-velocity sensors.

Does this module provide relay outputs?

Yes, this unit includes dual relay outputs configured for Alert and Danger alarm conditions.

What is the primary function of the 4-20 mA output?

The 4-20 mA output provides a proportional signal representing the measured velocity, allowing for remote monitoring and trend analysis via a plant control system or data acquisition unit.