Find top-rated China transfer switch breakers with 3-phase support, manual/automatic transfer, and IP65 protection. 61 Million during 2024, according to the United Nations COMTRADE database on international trade. When selecting an automatic transfer switch, important factors to consider include the switch's amperage, voltage rating. An Automatic Transfer Switch (ATS) is a critical component in power management systems that ensures seamless switching between primary and backup power sources during outages. SKT series ATS is AISIKAI's flagship product, well-established and trusted in the generator set industry. PC Class and AC-33A (the highest). Zhejiang Tengen Electric Co. specializes in low-voltage distribution and industrial control electrical appliances, offering a wide range of products including miniature circuit breakers (MCBs), moulded case circuit breakers (MCCBs), and air circuit breakers (ACBs).