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Bently Nevada 3500 monitoring system series modules
The Bently Nevada 3500 monitoring system is an advanced online monitoring and protection system, mainly used for
the condition monitoring of large rotating machinery. It is widely applied worldwide, with more than 80,000 units
installed. The following is the specific introduction:
System Features:
High compatibility: It can be used in conjunction with Bentley approach eddy current sensors, velocity and acceleration
sensors, etc., and can accept signal inputs from various types of sensors.
Powerful protection function: Leading the world in detecting and preventing false tripping of rotating machinery, the
tripping monitoring machine provides automatic protection values, effectively preventing equipment damage.
Flexible software configuration: Combining a wide range of mechanical measurement parameter options in the
industry, it can almost meet the software configuration requirements of all mechanical monitoring scenarios and fully
comply with the American Petroleum Institute API670 standard.
High reliability design: It features self-detection and fault tolerance capabilities, and can be configured with multiple
redundancy methods, ranging from adding a second fully redundant power supply to a complete triple modular
redundancy (TMR) configuration, which can meet the requirements of critical mission applications.
Extensive certification: It has passed the DNV and Class NK certificate certifications in the Marine application field, as
well as certifications from the Canadian Standards Institution (CSA), Factory Mutual Aid (FM), GOST, ATEX and CE, etc.,
with a wide range of applications.
System composition modules:
Framework Interface Module (RIM) : It is the main interface of the 3500 system configuration, display and status
monitoring software, used to achieve communication and interaction between the system and external devices.
Power module (3500/15) : Standard configuration line noise filter, can provide AC or DC input power, and is compatible
with various voltage sources worldwide.
Preamplifier monitoring module (such as 3500/40, 3500/42M) : It accepts input from proximity sensors, regulates the
signals, can measure parameters such as radial vibration and thrust position, and compares the signals with
user-programmable alarms, providing digital and analog outputs.
Key phase module (3500/25) : Usually a half-height, 2-channel module, it receives input signals from proximity probes
or magnetic pickups, converts them into digital key phase signals, and is used to indicate the coincidence position of
the key phase mark on the shaft and the key phase sensor, helping to measure the shaft speed and vector parameters.
Temperature monitoring module (3500/60, 3500/65) : The 3500/60 offers 6-channel temperature monitoring, while the
3500/65 provides 16-channel temperature monitoring. It can accept temperature inputs from thermal resistors (RTD)
and thermocouples (TC) and compare them with the user-defined programmable alarm set points.
Relay module (such as 3500/32, 3500/33) : It can provide multiple relay outputs, each of which can be independently
programmed. Through the "AND gate" and "OR gate" logic, the alarm input is utilized through the monitor channel in
the rack to achieve alarm or interlock control.
Transient Data Interface Module (3500/22M TDI) : It serves as the interface between the 3500 monitoring System and
Bentley Nevada System 1 mechanical management software. When used in conjunction with the M series monitor, it
continuously collects steady-state and transient waveform data and transmits the data to the main computer software
via Ethernet.
Communication capability: The system can communicate with the factory control and automation system through the
communication gateway module, supporting the Modbus protocol. Some modules have redundant communication
ports, such as Ethernet ports and serial RS-485 ports, which can achieve two-way communication with other systems,
facilitating the upload of monitoring information and the reception of control instructions.
Core application industries and scenarios
power industry
Application scenarios:
Steam turbine and generator monitoring: Real-time monitoring of parameters such as radial vibration, axial
displacement, rotational speed, and bearing temperature of steam turbine generator sets to prevent equipment
failures caused by rotor eccentricity, bearing wear, or abnormal thermal expansion, ensuring power generation
efficiency and grid stability.
Fan and compressor monitoring: It is used to monitor the mechanical conditions of power station supply fans, induced
draft fans and compressed air systems. Through vibration analysis, problems such as unbalanced impellers and
bearing failure can be detected in advance to avoid unplanned shutdowns.
Typical case: In thermal power plants, nuclear power plants and gas-fired power plants, the 3500 system often serves
as the "health manager" for the main equipment. For instance, a certain 1 million kilowatt thermal power unit uses the
3500 system to monitor the vibration of the steam turbine shaft, advancing the equipment failure warning time to 72
hours before the failure occurs.
The oil and gas industry
Application scenarios:
Compressor and pump set protection: Real-time monitoring of key equipment such as centrifugal compressors and
injection pumps in natural gas transmission pipelines is carried out. Through relay modules, interlock shutdowns are
achieved in emergency situations such as overspeed and vibration over-limit to prevent pipeline leakage or equipment
damage.
Offshore platform equipment monitoring: Meeting the requirements of offshore certifications such as DNV, it is used
to monitor the main motors, gearboxes and other equipment of drilling platforms, ensuring stable operation in high
humidity and vibration environments, and reducing offshore maintenance costs.
Typical case: A certain deep-sea oil and gas platform adopts a 3500 system triple modular redundancy (TMR)
configuration, monitoring multiple natural gas compressors, with system availability reaching 99.99%, ensuring the
continuous operation of oil and gas extraction.
Chemical and petrochemical industry
Application scenarios:
Monitoring of reaction vessels and rotating machinery: Monitor the status of equipment such as agitators in chemical
reaction vessels and fans in cracking furnaces, and prevent material leakage or abnormal reactions caused by
mechanical failures through the analysis of temperature and vibration parameters.
Interlocking control of large-scale compressor units: In the ethylene cracking unit, the 3500 system provides
multi-parameter interlocking protection for the propylene compressor and the ethylene compressor through a relay
module. When the parameter of a certain channel exceeds the limit, the shutdown is triggered through the "AND
gate/or gate" logic to avoid interlocking accidents.
Typical case: A certain petrochemical enterprise used the 3500 system in the reforming unit, combined with the
standard configuration of API 670, reducing the compressor failure shutdown rate by 80% and reducing losses by
more than 10 million yuan annually.
Metallurgy and steel industry
Application scenarios:
Rolling mill and motor monitoring: Monitor the vibration and temperature of the main motor and gearbox of the steel
rolling mill to prevent roll wear or shaft breakage accidents caused by mechanical fatigue and ensure the accuracy of
steel plate rolling.
Blast furnace blower protection: Real-time speed and vibration monitoring of the blast furnace blower is carried out.
When the equipment shows signs of surging, the system quickly adjusts the opening degree of the intake valve or
triggers the shutdown through the relay module to prevent blast furnace air cut-off accidents.
Typical case: A large steel plant deployed the 3500 system in the hot continuous rolling mill. By analyzing the phase of
the roll speed through the key phase unit module, the rolling process was optimized, which extended the equipment's
service life by 30%.
Model of the 3500 monitoring system series module
3500/15 power supply
3500/20 framework interface module
3500/22 framework interface module
3500/22M transient data interface module
3500/25 key phase module
3500/32 relay module
3500/33 relay module
3500/34 triple redundant relay module
Channel types of the 3500/40 monitor module: radial vibration, axial displacement, eccentricity, and differential expansion
Channel types of the 3500/42 monitor module: acceleration, velocity, and absolute vibration of the axis
Channel types of the 3500/45 monitor module: axial displacement, differential expansion, inclined plane differential expansion, shell expansion, valve position
3500/53 monitor module channel type: Overspeed tachometer
3500/92 communication gateway module
3500/93 display device monitor
3500/94 display device monitor
3500/95 display device monitor
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