• Bently Nevada 3300/40-12-01-01-00-00
  • Bently Nevada 3300/40-12-01-01-00-00
  • Bently Nevada 3300/40-12-01-01-00-00
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Bently Nevada 3300/40-12-01-01-00-00 Eccentricity Monitor Module

Bently Nevada 3300/40-12-01-01-00-00 Eccentricity Monitor Module

The Bently Nevada 3300/40 Eccentricity Monitor is a rack-mounted module designed to measure shaft eccentricity in large rotating machinery such as turbines and compressors. It continuously compares eccentricity values against...

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SKU: 3300/40-12-01-01-00-00
Vendor: Bently Nevada
Category: Vibration Monitor Module
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The Bently Nevada 3300/40 Eccentricity Monitor is a rack-mounted module designed to measure shaft eccentricity in large rotating machinery such as turbines and compressors. It continuously compares eccentricity values against alarm setpoints, providing early warning of rotor bow or misalignment. By integrating into the 3300 rack system, it delivers precise displacement data, enabling predictive maintenance and reducing downtime.

Features

  • Monitors shaft eccentricity and bow during slow-roll conditions.
  • Continuous parameter comparison against programmable alarm setpoints.
  • Integrated relay actuation for Alert and Danger alarm conditions.
  • Front-panel LED indicators for OK, Bypass, Alert, and Danger status.
  • User-programmable sensitivity settings for 200 mV/mil or 100 mV/mil probes.

Applications

This module is specifically engineered for critical machinery protection in power generation and industrial processing, including steam and gas turbines, large centrifugal compressors, and high-speed rotating equipment where shaft bow detection is essential for safe startup and operation.

Technical Specifications

Model 3300/40-12-01-01-00-00
Brand Bently Nevada
Series 3300
Operating Temperature 0 to 60 degC
Power Consumption 1.5 W (typical)
Input Signal Proximity probe signals via Proximitor sensors
Sensitivity 200 mV/mil or 100 mV/mil (user-programmable)
Accuracy +/- 0.33% typical, +/- 1% max at 25 degC
Analog Outputs +4 to +20 mA, +1 to +5 VDC, 0 to -10 VDC

Installation Guidelines

  • Ensure the 3300 rack is powered down before inserting or removing the module.
  • The module is designed for standard 3300 rack mounting; ensure proper seating in the backplane connector.
  • Use shielded twisted-pair cabling for transducer inputs to minimize EMI interference.
  • Maintain proper grounding of the 3300 rack system to the plant common ground.
  • Verify that the transducer gap voltage is within the specified linear range for the installed Proximitor sensor.
  • Ensure adequate ventilation around the rack to maintain ambient temperatures within the 0 to 60 degC operating range.

FAQ

What is the primary function of the 3300/40 module?

The 3300/40 is designed to measure peak-to-peak shaft eccentricity, which is vital for detecting shaft bow during the slow-roll phase of turbine startup or shutdown.

Does this module require external power?

The module receives its operating power directly from the 3300 rack backplane once installed.

How are the alarm setpoints configured?

Alarm setpoints are configured via the 3300 rack configuration software or front-panel adjustments depending on the specific system setup, allowing for precise Alert and Danger threshold management.