Bently Nevada 3300/20-03-01-00-00-00 Dual Thrust Position Monitor
The Bently Nevada 3300/20-03-01-00-00-00 is a dual-channel thrust position monitor of the 3300 Series Turbine Supervisory Instrumentation developed by Baker Hughes, formerly GE Bently Nevada. Based on eddy current non-contact measurement principle, it is designed for continuous online monitoring of axial thrust displacement of rotating machinery shafts. The module accurately measures the axial movement of the rotor relative to thrust bearings, and detects early faults including thrust bearing wear and abnormal axial load, which effectively avoids serious mechanical accidents such as collision between rotor and stator. It adopts two independent signal input channels and high-precision signal conditioning circuits to ensure stable and accurate measurement results. This unit supports hot-swap installation on standard 19-inch racks and can work alongside other modules of the 3300 series. Built-in comprehensive self-diagnostic functions ensure reliable long-term operation. This model has no relay outputs or analog outputs, focusing purely on data collection and real-time monitoring. It fully complies with API 670 and relevant international industrial standards for rotating machinery supervision.
Description
Bently Nevada 3300/20-03-01-00-00-00 Dual Thrust Position Monitor
Product Overview
The Bently Nevada 3300/20-03-01-00-00-00 is a dual-channel thrust position monitor of the 3300 Series Turbine Supervisory Instrumentation developed by Baker Hughes, formerly GE Bently Nevada. Based on eddy current non-contact measurement principle, it is designed for continuous online monitoring of axial thrust displacement of rotating machinery shafts. The module accurately measures the axial movement of the rotor relative to thrust bearings, and detects early faults including thrust bearing wear and abnormal axial load, which effectively avoids serious mechanical accidents such as collision between rotor and stator. It adopts two independent signal input channels and high-precision signal conditioning circuits to ensure stable and accurate measurement results. This unit supports hot-swap installation on standard 19-inch racks and can work alongside other modules of the 3300 series. Built-in comprehensive self-diagnostic functions ensure reliable long-term operation. This model has no relay outputs or analog outputs, focusing purely on data collection and real-time monitoring. It fully complies with API 670 and relevant international industrial standards for rotating machinery supervision.
Basic Information
Model: 3300/20-03-01-00-00-00. Manufacturer is Bently Nevada, a brand under Baker Hughes. It is defined as a dual-channel thrust position monitor and belongs to the 3300 Series TSI system. It features 19-inch standard rack mounting and supports hot swap without system shutdown. Power is supplied by the system backplane with -24 VDC, and the allowable voltage fluctuation range is ±10%. The typical weight is around 1.0 kg. The protection class is IP20, suitable for installation inside indoor industrial control cabinets. The product meets CE and RoHS requirements, and conforms to API 670 specifications. It is configured with standard internal electrical isolation, and comes without relay outputs and analog signal outputs.
Function & Positioning
This module is a fundamental monitoring component dedicated to shaft axial thrust position of large rotating machinery. Its core duties are real-time displacement measurement, data acquisition and operating status tracking. It receives signals from two eddy current proximity probes, and completes signal conditioning, linearization and processing to deliver high-precision detection data. Operators can finish parameter configuration and status check locally via the front panel keypad. The dual-channel design allows redundant sensor layout and greatly improves measurement reliability. The integrated self-diagnostic system continuously monitors power supply, internal circuits and probe loop status to realize fast fault location and reduce maintenance time. As an essential part of the 3300 TSI system, it communicates with System 1 software as well as on-site DCS, PLC and SCADA systems to realize data uploading, trend analysis and equipment health management. Without alarm and interlock functions, this module is mainly applied for monitoring and data recording instead of on-site protection control.
Core Performance Parameters
The module is equipped with two independent measuring channels for thrust position detection. It is fully compatible with Bently Nevada standard eddy current proximity probes and matched signal conditioners. The standard measurement range is ±1.0 mm, with high accuracy and fine resolution to stably capture tiny axial displacement changes. Each channel has high input impedance and fast signal response to timely reflect transient shaft position variation. The operating voltage is -24 VDC and the overall power consumption is kept at a low level. There are no relay outputs or analog outputs. The isolation strength between input circuits and power circuits reaches 2500 VAC, providing excellent electromagnetic interference resistance. 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 permitted in the operating environment.
General Compatible Accessories
Compatible accessories include Bently Nevada 3300 XL series and 7200 series eddy current proximity probes, which act as core sensing elements for displacement signal collection. Supporting high-frequency low-noise coaxial cables are used to connect probes and signal processing units to guarantee stable signal transmission. Special signal conditioners for eddy current probes are required for signal conversion and processing. The module matches 3300 series standard 19-inch racks and supporting backplanes that provide power supply and system communication bus. The 3300/10 series redundant power supply module can offer stable power for the entire TSI system. Local parameter setting and status inspection are realized via the front panel keypad, while remote management and data analysis depend on the supporting System 1 host software.
Applicable Equipment & Industries
This monitor is applicable to various critical large rotating equipment, including steam turbines, gas turbines and turbo-generator sets. It also works for centrifugal compressors, axial compressors, large industrial fans, multi-stage process pumps, high-speed drive motors and turbo expanders. In terms of industrial application, it is widely used in power generation industry for monitoring turbine and generator units in thermal power and nuclear power plants. It serves oil, gas and petrochemical industries to monitor compressors and process pumps under harsh operating conditions. It is also commonly deployed in metallurgy, air separation and chemical industries to monitor key high-speed rotating machinery and ensure continuous and stable production.
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