Product Introduction: 3500/20 125744-02
The 3500/20 125744-02 is a specific hardware version of the Radial Vibration Monitor module from the Bently Nevada 3500 Machinery Protection System. This module is a fundamental component for monitoring the relative shaft vibration of rotating machinery using two non-contact eddy-current proximity probes, typically installed 90 degrees apart (X and Y direction) on a single bearing. It processes the dynamic signals from these probes to provide continuous monitoring of vibration amplitude and phase, which are critical parameters for detecting mechanical faults such as imbalance, misalignment, and shaft cracks.
Technical Parameters
The key technical specifications for the 3500/20 125744-02 module are summarized in the table below.
| Parameter | Specification |
|---|---|
| Part Number | 3500/20 125744-02 |
| System | Bently Nevada 3500 |
| Module Type | Radial Vibration Monitor (Dual-Channel) |
| Dimensions (H x W x D) | 190 mm x 55 mm x 120 mm (Standard 3500 Rack Slot) |
| Weight | 0.49 kg |
| Input Channels | 2 (for X and Y probes) |
| Input Signal | Accepts signals from eddy-current proximity probes (-2 to -18 VDC gap voltage) |
| Measurement Parameters | Vibration Amplitude (peak-peak or RMS), Phase |
| Dynamic Range | 80 dB |
| Frequency Response | 0.5 Hz to 10,000 Hz |
| Alarm Setpoints | Two user-configurable levels per channel (Alert and Danger) |
| Outputs | 4-20 mA proportional output for vibration and gap (per channel) |
| Power Supply | Powered by the 3500 Rack; +24 VDC from the rack's power supply |
| Operating Temperature | -20°C to +65°C |
Application Scenarios
The 3500/20 monitor is a cornerstone for protecting critical rotating machinery by directly monitoring shaft health.
Turbine and Compressor Monitoring:
Essential for monitoring radial vibration on steam turbines, gas turbines, and centrifugal compressors in power generation, oil & gas, and petrochemical industries to prevent catastrophic failure.
Pump and Motor Protection:
Used on critical high-energy pumps and large motors to detect developing mechanical faults like imbalance and misalignment before they lead to unplanned downtime.
Machine Train Analysis:
Installed on multiple bearings along a machine train (e.g., a compressor train driven by a steam turbine) to provide a comprehensive view of the entire shaft line's dynamic behavior.
Orbital Vibration Analysis:
The dual-channel input allows the system to plot shaft orbital motion, which is a powerful diagnostic tool for identifying specific conditions such as oil whirl, rubs, and rotor instability.
Predictive Maintenance:
Provides the high-resolution vibration and phase data necessary for a predictive maintenance program, enabling trend analysis and fault diagnosis to schedule maintenance based on actual machine condition.
Global direct procurement guarantee
All products are purchased directly from overseas original manufacturers or authorized channels, 100% guaranteed genuine quality, sufficient spot inventory, and comprehensive model coverage
Quality Commitment
Each product has been tested by our technicians, providing 12-month long warranty, worry-free after-sales
Flexible procurement plan
- Bulk order enjoys Friendship discount (2 pieces or more can be applied)
- Long-term cooperative customers can apply for priority supply
Full service support
7×24 hours technical consultation, from selection guidance to installation and commissioning to provide full life cycle service (paid)
Why do so many customers choose us?
On the basis of the same quality, we provide:
- More competitive price system
- Faster logistics response
- More complete technical support (free product technical documentation)
Your trust is the driving force for our continuous progress, submit your requirements immediately to get exclusive quotes
