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YZFN-10 (20) series load switch is suitable for integrated transformer with AC frequency of 50Hz and 60Hz and rated voltage of 20 kV. It uses transformer oil as insulation and arc extinguishing medium, and the operating mechanism is a spring energy storage device. Through three-phase linkage, it can accurately and quickly connect or disconnect the rated load current. It can be used as a control and protection device for industrial and civil power supply in ring network power supply and dual power supply system.

The load switch has four power connection modes: ring network power supply, bus 1 power supply, bus 2 power supply and disconnection. Use a dedicated lever to rotate the load switch clockwise or counterclockwise, depending on the power line switching requirements. The position can be changed by rotating 90 degrees for each operation, and 360 degrees of cyclic rotation can be realized. The switch has many types such as T type, R type, S type, H type, V type and terminal type, and users can choose according to their own needs.