Bently Nevada 3300/20-03-01-02-01-02 Dual Thrust Position Monitor
The Bently Nevada 3300/20-03-01-02-01-02 is a professional dual-channel thrust position monitor from the 3300 Series Turbine Supervisory Instrumentation developed by Baker Hughes, formerly GE Bently Nevada. Based on eddy current non-contact measurement technology, it is designed for continuous online monitoring of shaft axial thrust position on critical rotating machinery. The module accurately measures rotor axial displacement relative to thrust bearings, and detects early faults such as thrust bearing wear and abnormal axial load, effectively preventing severe mechanical failures like rotor-stator collision. It is equipped with two independent signal channels, high-precision signal conditioning circuits, configurable alarm logic and dedicated relay outputs. Supporting hot-swap installation on standard 19-inch racks, it can work collaboratively with other modules of the 3300 series. Built-in comprehensive self-diagnosis functions ensure stable operation. This product has passed relevant industry certifications and fully complies with API 670 standards, delivering reliable monitoring and protection performance for industrial rotating equipment under complex working conditions.
Description
Bently Nevada 3300/20-03-01-02-01-02 Dual Thrust Position Monitor
Product Overview
The Bently Nevada 3300/20-03-01-02-01-02 is a professional dual-channel thrust position monitor from the 3300 Series Turbine Supervisory Instrumentation developed by Baker Hughes, formerly GE Bently Nevada. Based on eddy current non-contact measurement technology, it is designed for continuous online monitoring of shaft axial thrust position on critical rotating machinery. The module accurately measures rotor axial displacement relative to thrust bearings, and detects early faults such as thrust bearing wear and abnormal axial load, effectively preventing severe mechanical failures like rotor-stator collision. It is equipped with two independent signal channels, high-precision signal conditioning circuits, configurable alarm logic and dedicated relay outputs. Supporting hot-swap installation on standard 19-inch racks, it can work collaboratively with other modules of the 3300 series. Built-in comprehensive self-diagnosis functions ensure stable operation. This product has passed relevant industry certifications and fully complies with API 670 standards, delivering reliable monitoring and protection performance for industrial rotating equipment under complex working conditions.
Basic Information
Model is 3300/20-03-01-02-01-02, manufactured by Bently Nevada under Baker Hughes. It is categorized as a dual-channel thrust position monitor and belongs to the 3300 Series TSI system. The module adopts 19-inch standard rack mounting structure and supports hot swap without system shutdown. Operating power is supplied by the system backplane at -24 VDC, with an allowable voltage fluctuation range of ±10%. The typical weight is approximately 1.0 kg. The protection class is IP20, suitable for installation inside indoor industrial control cabinets. This model is equipped with relay outputs and standard electrical isolation design, and has obtained extra industry safety certifications. It complies with CE, RoHS and API 670 specifications for rotating machinery monitoring instruments.
Function & Positioning
This module is a core monitoring and protection device for shaft axial thrust position of large rotating machinery. It mainly undertakes real-time measurement, status tracking and over-limit protection of rotor axial displacement. It receives signals from two eddy current proximity probes, and completes signal conditioning, linearization and data processing to realize high-precision displacement detection. Users can finish parameter setting locally via the front panel keypad or remotely through upper computer systems. The adjustable alarm delay function can filter transient signal disturbances and avoid false alarms. The configured relay outputs can be connected to on-site alarm devices and interlock control loops to realize over-limit alarm and equipment protection. The dual-channel design supports redundant sensor layout and improves measurement reliability. The integrated self-diagnosis system continuously monitors power supply, internal circuits, probe loops and relay operating status for quick fault location. As an important part of the 3300 TSI system, it communicates with System 1 platform as well as on-site DCS, PLC and SCADA systems to realize data upload, trend analysis and predictive maintenance management.
Core Performance Parameters
The module is configured with two independent thrust position measuring channels, compatible with full series of Bently Nevada standard eddy current proximity probes and supporting signal conditioners. The standard measurement range is ±1.0 mm, featuring high measurement accuracy and excellent resolution to capture tiny axial displacement changes stably. Each signal channel has high input impedance and fast signal response, which can timely reflect transient position variation of the shaft. The rated operating voltage is -24 VDC, and the overall power consumption remains at a low level. It is fitted with sealed SPDT alarm relays, and the contact rated load is 2 A at 24 VDC. The isolation strength between input circuits and power circuits reaches 2500 VAC, with strong anti-electromagnetic interference capability. There is no analog output on this model. The operating temperature ranges from 0 °C to 65 °C, and the storage temperature ranges from -40 °C to 85 °C. The working relative humidity is 5% to 95%, and condensation is not allowed in the operating environment.
General Compatible Accessories
Matched accessories include Bently Nevada 3300 XL series and 7200 series eddy current proximity probes, which act as core sensing components for displacement signal collection. Supporting high-frequency low-noise coaxial cables are used to connect probes and signal processing units to guarantee stable and low-distortion signal transmission. Special eddy current signal conditioners are required to cooperate with probes for signal conversion and amplification. The module matches 3300 series standard 19-inch installation racks and supporting backplanes that provide power supply and system communication bus. The 3300/10 series redundant power supply module can provide stable operating power for the entire TSI system. Local parameter configuration and status checking are realized through the front panel keypad, and remote management and data analysis are completed via the supporting System 1 host software.
Applicable Equipment & Industries
This monitoring module is applicable to various key large rotating equipment, including steam turbines, gas turbines and turbo-generator sets. It is also widely used on centrifugal compressors, axial compressors, large industrial blowers, multi-stage process pumps, high-speed driving motors and turbo expanders. In industrial fields, it serves the power generation industry for monitoring and protection of turbine and generator units in thermal power and nuclear power plants. It is widely applied in oil, gas and petrochemical industries to ensure the safe operation of compressors and process pumps under harsh working conditions. It also works for metallurgy, air separation and chemical industries, conducting real-time monitoring on critical high-speed rotating machinery to maintain continuous and stable production of production lines.
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