Product Description

The Bently Nevada 133388-02 is a high-precision tachometer and Keyphasor monitoring core module belonging to the 3500 series machinery protection system. Serving as the dedicated rotational speed and phase reference acquisition unit for rotating equipment, it accurately collects speed pulse signals and keyphasor phase signals from field probes. It realizes real-time rotational speed measurement, direction judgment and phase reference positioning, providing critical synchronous reference data for vibration analysis, shaft eccentricity calculation and equipment fault diagnosis of turbines, compressors and generators.

Main Specifications

1. Full Part Number: 133388-02; Product Type: 3500/50 series tachometer and Keyphasor dedicated monitoring module
2. Applicable System: Bently Nevada 3500 machinery protection system, rotating equipment condition monitoring platform
3. Core Function: Rotational speed monitoring, keyphasor phase acquisition, rotation direction judgment, speed abnormal alarm and data recording
4. Frequency Range: 0.0167 Hz to 20 kHz, covering full-range speed monitoring of industrial rotating machinery
5. Input Impedance: Standard 20 kΩ, optional 40 kΩ for diverse probe signal adaptation
6. Signal Threshold: 0.5 V–9.5 V adjustable, supporting automatic and manual dual switching modes
7. Response Performance: Fast response speed ≤10 ms for real-time speed state feedback
8. Output Mode: Support 4–20mA analog output and relay alarm contact signal output
9. Monitoring Logic: Built-in overspeed, underspeed, zero-speed, reverse rotation and acceleration abnormal judgment
10. Data Recording: Peak speed, reverse peak value and reverse times automatic storage function
11. Maintenance Design: Support hot-swap pluggable installation for non-stop online replacement
12. Operational Reliability: Compliant with API670 industrial standards, low failure rate for long-term speed monitoring tasks

Core Functions

1. Act as the professional speed and phase reference monitoring unit for 3500 system monitoring racks.
2. Accurately acquire real-time pulse signals to calculate and display equipment rotational speed stably.
3. Capture keyphasor phase signals to provide synchronous reference for vibration waveform analysis.
4. Automatically identify forward and reverse rotation status to prevent equipment reverse operation risks.
5. Trigger alarm output for overspeed, underspeed and zero-speed abnormal working conditions.
6. Record peak speed and abnormal rotation data to support equipment operating trend analysis.
7. Output standard analog and relay signals to realize linkage with upper control and alarm systems.
8. Guarantee accurate speed safety monitoring and phase synchronization of key rotating equipment.

Application Scenarios

1. Thermal power plant turbine, generator and auxiliary rotating equipment speed monitoring systems
2. Petrochemical large compressors, centrifugal units and pump set phase reference monitoring platforms
3. Energy industry gas turbine unit high-precision speed measurement and anti-reverse rotation protection scenarios
4. Industrial sites requiring synchronous speed monitoring and phase reference for vibration diagnosis
5. Old 3500/50 speed monitoring module replacement and machinery condition monitoring system upgrading projects
6. Harsh industrial environments with strong electromagnetic interference and long-cycle continuous operation
7. All rotating machinery speed safety monitoring and phase synchronous diagnosis applications based on 3500 system architecture