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The Bently Nevada 3300/55-01-04-02-02-03-00-05-00 is a specialized Dual Velocity Monitor module engineered for the 3300 Series machinery protection system. This unit provides reliable, continuous monitoring of casing vibration velocity by interfacing directly with Velomitor piezo-velocity sensors. It features two independent channels that process vibration signals to identify potential mechanical issues, offering both proportional output signals and relay-based alarm logic for automated machine protection.

Features

  • Dual-channel architecture for independent monitoring of two vibration points.
  • Compatibility with standard Velomitor piezo-velocity transducers.
  • Integrated alarm management with dedicated Alert and Danger relay outputs.
  • Front-panel LED status indicators for OK, Bypass, Alert, and Danger conditions.
  • Configured with intrinsic safety barriers for operation in hazardous area environments.
  • Proportional 4-20 mA outputs for integration with external PLC or DCS systems.

Applications

This module is primarily utilized in critical industrial rotating machinery applications, including turbines, compressors, fans, and pumps where casing vibration velocity is a key indicator of structural or mechanical health.

Technical Specifications

Model 3300/55-01-04-02-02-03-00-05-00
Series 3300
Inputs 2 x Velomitor piezo-velocity sensor channels
Outputs 4-20 mA proportional, Relay (Alert/Danger)
Power Consumption 1.5 W (typical)
Operating Temperature 0 degC to 60 degC

Installation Guidelines

  • Ensure the 3300 rack is powered down before inserting or removing the monitor module to prevent electrical damage.
  • Verify that all field wiring is routed to prevent electromagnetic interference (EMI) from high-voltage power cables.
  • Use appropriate shielded cabling for transducer inputs to maintain signal integrity.
  • Ensure the module is fully seated in the rack slot and the front-panel screws are tightened to ensure proper grounding and mechanical stability.
  • Confirm the configuration of intrinsic safety barriers matches the requirements of the specific hazardous area installation.

FAQ

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

The 3300/55 is designed to measure casing vibration velocity using piezo-velocity sensors, comparing these values against pre-set alarm limits to trigger protective relays for machinery shutdown or operator notification.

Is this module suitable for hazardous locations?

Yes, this specific configuration (indicated by the 03 barrier option) includes intrinsic safety barriers intended for use in hazardous environments, provided all installation requirements are met.

What do the LED indicators on the front panel represent?

The LEDs provide immediate visual diagnostics, including the OK status of the sensor/module, Bypass status for maintenance, and the current Alert or Danger alarm state for each channel.

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