3500/20 125744-02 BENTLY

The BENTLY NEVADA 3500/20 125744-02 is a dual-channel vibration monitor module, a fundamental component of the renowned Bently Nevada 3500 machinery protection system. Manufactured by Bently Nevada (a Baker Hughes business), this module is specifically designed to continuously monitor the vibration of critical rotating assets, such as turbines and compressors, providing essential data for both protection and predictive maintenance.

Application Scenarios:

In a natural gas compressor station, the main centrifugal compressor is a critical asset whose failure would cause massive production losses. Two proximity probes are installed on the compressor's bearing housings to measure radial vibration. The BENTLY NEVADA 3500/20 125744-02 module continuously monitors these signals. If the vibration levels exceed predefined danger thresholds, it sends a trip signal to the compressor's control system within milliseconds, initiating a safe shutdown to prevent catastrophic mechanical damage. This application directly addresses the paramount need for asset protection and operational safety.

Parameter:

Technical Principles and Innovative Values:

· •Innovation Point 1: Redundant and Independent Channel Architecture. Each of the two channels in the 3500/20 125744-02 is fully independent, including its own power supply, processor, and relay outputs. This redundancy ensures that a failure in one channel does not disable the protection for the other, significantly enhancing the overall system reliability and meeting critical safety requirements.

· •Innovation Point 2: Comprehensive Built-in Diagnostics. The module continuously performs self-tests on its internal circuitry and monitors the health of the connected sensors and wiring. It can detect faults such as a broken probe cable, a short circuit, or a power supply issue, and will indicate the fault via LEDs and system software, preventing a dangerous situation where the monitoring function is lost without warning.

· •Innovation Point 3: Advanced Dynamic Signal Processing. Beyond simple overall vibration value monitoring, the module provides a raw, buffered dynamic waveform output for each channel. This allows maintenance engineers to connect an analyzer for detailed frequency spectrum analysis, enabling them to diagnose the root cause of vibration issues, such as imbalance, misalignment, or bearing defects, facilitating predictive maintenance.

Application Cases and Industry Value:

A combined-cycle power plant experienced repeated, unexplained trips on a critical gas turbine-generator unit, causing significant revenue loss. The existing monitoring system provided limited data. After upgrading the vibration monitoring with a Bently Nevada 3500 system featuring the 3500/20 125744-02 modules, engineers used the dynamic waveform outputs to capture data during a trip. The analysis revealed a sub-synchronous vibration caused by oil whip in the turbine bearings, a problem invisible to the old system. This precise diagnosis allowed for a targeted rotor dynamics correction, eliminating the nuisance trips and increasing unit availability by over 99.5%.

Related Product Combination Solutions:

· •Bently Nevada 3500/15 Proximitor® Power Supply: Provides the required power for the proximity probes connected to the 3500/20 module.

· •Bently Nevada 3500/25 Keyphasor Module: Generates the essential once-per-revolution timing reference signal needed by the 3500/20 for phase measurement.

· •Bently Nevada 3300 XL 8mm Proximity Probes: The industry-standard sensors that provide the vibration signal to the 3500/20 module.

· •Bently Nevada 3500/22 Axial Position Module: A complementary module used to monitor thrust bearing position, often used alongside the 3500/20.

· •Bently Nevada System 1® Software: An asset performance management platform that collects and analyzes data from the entire 3500 system, including the 3500/20, for advanced diagnostics and trend analysis.

Installation, Maintenance, and Full-Cycle Support:

Installation of the BENTLY NEVADA 3500/20 125744-02 involves inserting it into an available slot in a 3500 series rack. Configuration, including setting alarm setpoints and sensor parameters, is performed using dedicated software. Proper installation and calibration of the associated proximity probes are critical for accurate monitoring.Routine maintenance is minimal but should include periodic verification of the system's health through the module's LED indicators and software diagnostics. Regular calibration checks of the entire loop (probe, cable, module) are recommended. The module's robust design ensures long-term reliability. We provide comprehensive lifecycle support, from initial system configuration and sensor selection to 24/7 technical support and a guaranteed supply of genuine BENTLY NEVADA 3500/20 125744-02 modules and related components.