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In today’s information age, schools have become important venues for nurturing future talents, and their teaching equipment and information technology facilities have become vital supports and tools for education and instruction. To ensure the proper operation of school teaching equipment and the smooth progress of teaching, a continuous power supply is particularly important. Taking XX International School as an example, the 0.4kV power distribution system features a single-power-source incoming structure, as shown in the figure below. The upstream 10kV system is stepped down to 0.4kV, with one power supply line connected. The 400V busbar supplies power to all electrical loads. Consequently, the continuity and reliability of power supply cannot be adequately ensured; when a single power supply line fails, it can easily lead to shutdowns or tripping of sensitive load equipment. Therefore, the school plans to add a backup power source, thereby establishing a dual-power supply system. A GTS dual-power fast switching system will also be installed, allowing for a rapid switch to the backup power source within 20 milliseconds in the event of a failure of the main power source. This ensures the continuous and reliable operation of sensitive equipment, thus guaranteeing the safe and stable progress of teaching activities throughout the school. file:///C:/Users/MARKET~1/AppData/Local/Temp/ksohtml816/wps27.jpg Based on the above requirements, the switching scheme must take the following aspects into consideration: 1) If the 0.4 kV distribution room is regarded as a distribution system, the flickering phenomenon may originate from higher-level systems outside the area or from within the area itself. If it comes from higher-level systems outside, rapid switching can be used to address it; whereas if it is caused by a short circuit in a certain circuit within the area, the switching equipment must have the capability to make accurate judgments and implement safety interlocks to prevent the fault from spreading when it has not yet been isolated. 2) By following a sequence of first separating and then closing, when a closing command is issued, the controller in the switching device must conduct an accurate analysis of the bus disturbance model, to ensure precise prediction of the amplitude, phase, and frequency of the voltages on both sides during closing, thereby eliminating the risk of voltage surges. 3) When flickering occurs, it is common for there to be multiple instances of flickering in a short period of time. After the GTS dual-power fast switching system completes a switch, the system gets locked and must be manually reset. Once the main power supply returns to normal, the system can be restored to operating under the main power supply, either manually or automatically. The GTS dual-power quick-switching system is installed in the 0.4kV power distribution system; its installation location is shown in the system schematic below: file:///C:/Users/MARKET~1/AppData/Local/Temp/ksohtml816/wps28.jpg. The functional components of the GTS dual-power quick-switching system are illustrated in the image below: file:///C:/Users/MARKET~1/AppData/Local/Temp/ksohtml816/wps29.jpg. With two separate 400V power supplies, this system ensures continuous power supply to the 0.4kV power distribution system by switching between the main and backup power sources during operation, thereby preventing downtime of sensitive load devices and avoiding any voltage spikes. The GTS dual-power fast transfer switch features functions such as rapid switching, superior compatibility, intelligent current direction detection, on-site programming, full-lifecycle monitoring, and smart remote interconnection. The main technical parameters are as follows: Compliance standard: GB14048.11-2016; Number of poles: 3P/4P; Rated operating voltage Ue (V): AC400; Frame current (A): 1250; Rated operating current Ie (A): 1250; Rated insulation voltage Ui (V): AC800; Rated control power supply voltage Us (V): AC380; Rated short-circuit breaking current Iq (kA): 35; Rated impulse withstand voltage Uimp (kV): 8; Rated frequency (Hz): 50; Usage category: AC-33A; Transfer operation time: less than 20 ms; Operating current (A): 10; Mechanical service life: 10,000 cycles; Electrical service life: 20,000 cycles; Operating cycle rate: 30 cycles/hour. Dimensions: Width (mm): 1000; Height (mm): 2200; Depth (mm): 800. In summary, the application of the GTS dual-power fast transfer switch in ensuring continuous power supply in schools provides a reliable and efficient power protection solution for educational institutions. By introducing this technical equipment, schools can enhance the reliability of their power supply, ensure that teaching equipment operates without interruptions, create a favorable learning environment for teachers and students, and promote the development of education.