The HWKG2 series transfer switches and isolation switches are widely used, whether to ensure the availability of low power supply, or to provide continuous and stable power supply for lighting and generator circuits, switching the main power supply to the standby power supply, and vice versa. The load switch is an independent manual switching mode, connected to the disconnect current, and can be guaranteed to operate under normal circuit and may include operating overload conditions, or specially specified abnormal circuit such as short circuit conditions of specified time. Modular construction, compact size, suitable for the strict AC-23A category.