Introduction to 3500/20-01-01-00 125760-01
The 3500/20-01-01-00 125760-01 is a critical monitoring module from the Bently Nevada 3500 Series, a renowned system for machinery protection. This specific model is a Dual Channel Vibration Monitor.
Its primary function is to continuously monitor the vibration levels of rotating machinery (such as turbines, compressors, and pumps) using data from proximity probes or seismic transducers. It processes this data to provide key vibration measurements like Overall Vibration, and if pre-configured thresholds are exceeded, it triggers alarms to protect the machinery from damage. The "125760-01" is likely a specific hardware or firmware revision. These modules are designed for high-reliability applications in industries where unplanned downtime is catastrophic.
Technical Parameters
The following table details the key specifications for the 3500/20-01-01-00 module.
| Parameter | Specification |
|---|---|
| Product Family / Series | Bently Nevada 3500 |
| Module Type | Rack-Monitoring Module |
| Function | Dual Channel Vibration Monitor |
| Compatible Sensors | Proximity Probes (for relative shaft vibration), Seismic Transducers (for absolute casing vibration) |
| Input Power | Powered by the 3500 Rack (typically +15 VDC, -15 VDC, and +5 VDC) |
| Key Measurements | Overall Vibration (Peak-to-Peak, RMS), Gap Voltage (for proximity probes) |
| Alarm Channels | Two dedicated alarm relays per channel (Alert and Danger/Danger) |
| Communication | Integrates with the 3500 framework; data accessible via the 3500/92 Communication Module |
| Operating Temperature | 0°C to +65°C (+32°F to +149°F) (Typical for control room environments) |
| Mounting | Installs in a 3500 Series rack (up to 16 modules per rack) |
| Approx. Dimensions (H x W) | 3 U (133.4 mm) x 1/4 Rack Width (Typical for a single-width 3500 module) * |
| Approx. Weight | ~ 1.0 kg (2.2 lbs) |
Note: The exact dimensions are defined by the rack slot it occupies.
Application Scenarios
This module is a cornerstone of predictive maintenance and machinery protection systems in critical rotating equipment applications.
Power Generation: Protecting gas and steam turbines in power plants by monitoring shaft vibration to prevent catastrophic blade failure and unplanned outages.
Oil & Gas: Monitoring large compressors and pumps on pipelines and offshore platforms to ensure operational safety and integrity, triggering shutdowns if dangerous vibration levels are detected.
Petrochemical & Refining: Safeguarding critical machinery in refining processes, such as centrifugal compressors and fans, from damage due to imbalance, misalignment, or bearing wear.
Water & Wastewater: Protecting large pump systems from damage caused by cavitation or mechanical failure, ensuring continuous operation.
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