Description
The Bently Nevada 3300/55 Dual Velocity Monitor is a high-reliability, rack-mounted module engineered for the 3300 Series monitoring system. It is specifically designed to process casing vibration velocity signals from Velomitor piezo-velocity sensors. By providing two independent monitoring channels, the unit ensures continuous surveillance and protection of critical rotating machinery, including industrial turbines, centrifugal compressors, motors, and pumps.
Features
- Dual-channel velocity measurement for comprehensive casing vibration monitoring.
- Direct compatibility with Velomitor piezo-velocity sensors.
- Integrated alarm logic providing Alert and Danger status outputs.
- Proportional 4-20 mA outputs for integration with external PLC or DCS systems.
- Front-panel LED indicators for quick status verification of OK, Bypass, Alert, and Danger states.
- High-density rack-mount architecture for efficient panel space utilization.
Applications
This monitor is essential for machinery protection in heavy industrial environments, particularly where casing vibration velocity is a key indicator of machine health. It is frequently deployed in power generation, petrochemical processing, and oil and gas facilities to prevent catastrophic failures through automated alarm and trip sequences.
Technical Specifications
| Model |
3300/55-01-04-12-12-00-00-05-01 |
| Brand |
Bently Nevada |
| Series |
3300 |
| Input Channels |
2 independent Velomitor channels |
| Operating Temperature |
0 degC to 60 degC |
| Power Consumption |
1.5 W (typical) |
| Outputs |
4-20 mA proportional, Relay (Alert/Danger) |
Installation Guidelines
- Ensure the 3300 rack is powered down before inserting or removing the module to prevent electrical damage.
- Verify that the module is fully seated in the rack slot and the front-panel captive screws are tightened to maintain ground continuity.
- Use shielded twisted-pair cabling for sensor inputs to minimize EMI interference in high-noise industrial environments.
- Ensure proper grounding of the rack system according to Bently Nevada standard practices to maintain signal integrity.
- Avoid locating the monitoring rack in areas with extreme temperature fluctuations or excessive moisture.
FAQ
What is the primary function of the 3300/55 module?
The 3300/55 is a Dual Velocity Monitor designed to measure casing vibration velocity using piezo-velocity sensors. It compares these signals against preset alarm levels to trigger machine protection alerts or shutdowns.
Can this module be used with sensors other than Velomitor?
This specific configuration (suffix 12) is factory-configured for Velomitor piezo-velocity sensors. Consult the Bently Nevada 3300 system manual for compatibility with other sensor types before installation.
What do the LED indicators represent on the front panel?
The LEDs provide visual feedback for the status of each channel, including OK (sensor/module health), Bypass (maintenance mode), Alert (warning threshold reached), and Danger (trip threshold reached).
