Description
The Bently Nevada 3300/55 Dual Velocity Monitor is a specialized rack-based module engineered for the 3300 Series monitoring system. It is designed to provide continuous casing vibration velocity monitoring using Velomitor piezo-velocity sensors. By processing two independent channels, the module ensures reliable detection of vibration levels, allowing for integration with plant protection systems to safeguard critical rotating machinery such as turbines, large motors, pumps, and centrifugal compressors.
Features
- Dual-channel architecture for independent velocity measurement.
- Compatibility with Velomitor piezo-velocity transducers.
- Integrated alarm logic for Alert and Danger setpoints.
- Proportional 4–20 mA outputs for integration with external control systems (DCS/PLC).
- Front-panel LED indicators providing real-time status for OK, Bypass, Alert, and Danger conditions.
- Configurable relay outputs to facilitate machine shutdown or operator notification.
Applications
This monitor is primarily deployed in industrial environments requiring rigorous vibration protection. Typical applications include monitoring the casing vibration of balance-of-plant equipment, high-speed compressors, and large-scale industrial pumping systems where velocity-based vibration monitoring is critical to preventing mechanical failure.
Technical Specifications
| Model |
3300/55-01-04-02-02-00-00-05-00 |
| Series |
3300 System |
| Sensor Input |
Velomitor Piezo-Velocity |
| Channels |
2 |
| Operating Temperature |
0 degC to +60 degC |
| Power Consumption |
1.5 W (typical) |
| Alarm Outputs |
Dual relay (Alert/Danger) |
| Analog Outputs |
4–20 mA proportional |
Installation Guidelines
- Ensure the 3300 series rack is properly grounded before inserting or removing any monitor modules.
- The module is designed for slide-in installation into a standard Bently Nevada 3300 rack; ensure the backplane connector is fully seated.
- Verify that wiring for the Velomitor sensors is shielded and routed away from high-voltage AC lines to minimize electromagnetic interference.
- Power down the rack or place the specific slot into 'Bypass' mode before performing maintenance or configuration changes to avoid false trips.
- Maintain adequate airflow within the cabinet to ensure the module operates within its 0 to 60 degC temperature range.
FAQ
What sensors are compatible with this module?
This specific unit (suffix 02 for transducer input) is configured for use with Bently Nevada Velomitor piezo-velocity sensors.
Does this module include intrinsic safety barriers?
No, this model (suffix 00 for barrier option) is configured without internal intrinsic safety barriers.
How are the alarm setpoints managed?
The 3300/55 monitor compares incoming vibration signals against user-defined Alert and Danger setpoints, triggering the internal relay logic when thresholds are exceeded.
