FBM216 Foxboro FOXBORO Controller, Shanghai Sijian Intelligent Technology Co., Ltd. is engaged in technical development, technical consultation, technical transfer in the fields of intelligent technology, information technology, and automation technology, as well as the sales of electrical equipment, automation equipment, electronic products, communication products, and electromechanical products. Industrial automation products include: PLC, DCS, sensors, frequency converters, encoders, relays, servo drives, soft starters, and touch screens. Product brands involved: Eurotherm, Schneider, Siemens, ABB, SICK, P+F, E+H, Yokogawa, Yamakawa, Mitsubishi, Emerson, Honeywell, FANUC, GE, Eaton Electrical, CT.
The company can provide solutions ranging from simple needs to complete process control instruments, valves, industrial process automation systems, industrial dispatch SCADA control systems, and related services. It sells and manufactures some of Foxboro's wide-range intelligent and conventional instruments, valves, indicators, recorders, and instruments for controlling process variables such as electromagnetic, vortex, mass, float-type flow meters, pressure differential transmitters, temperature, level, pH, conductivity, and composition.
FBM216 Foxboro FOXBORO Controller, transformer neutral point current and transformer tank vibration, with vibration detected by measuring acceleration. Challenges in current detection: the measured current range is large, and relative accuracy must be ensured across the entire measurement range, requiring multiple range Hall current sensors for coordinated detection. Challenges in acceleration detection: acceleration sensors use piezoelectric IEPE sensors, and the acquisition card needs to provide a constant current source excitation; the system must be expandable to multiple acceleration sensor measurement points, with many sampling ports, up to 24; high sampling rate requirements, up to 50kHz or higher; large amounts of sampled data and communication information; storing the collected data is also challenging, and the data storage format needs to be specially designed for easy querying.
Application solution: This solution incorporates the advantages of current DC monitoring systems while also considering the impact of DC bias on transformers by adding vibration monitoring. By simultaneously monitoring the main transformer neutral point DC current and transformer vibration, the occurrence of DC bias in transformers can be tracked in real time. The proposed monitoring system is a complete set of fully automatic, high-precision, real-time monitoring systems that can display the amplitude and polarity of the main transformer neutral point DC current and the amplitude changes of vibration in real time. It clearly shows the distribution pattern of DC current at the main transformer neutral points of various substations and its relationship with vibration levels, providing a basis for judging the degree of DC bias in transformers. The DC current monitoring solution is already mature, mainly focusing on ensuring accuracy across the required large range; based on the acceleration detection solution analyzed above, considering the need to develop a monitoring station PC interface, the Labview development platform is chosen, which allows direct development of the PC interface using this software, transmitting data to the monitoring station PC via fiber optic Ethernet. The core of this project lies in integrating multiple IEPE acquisition card ports and current acquisition ports into one platform for analyzing and processing these signals. The number of IEPE acquisition card ports can be selected based on the number of test points.