ABOUT US

One Two Three Electric Co., Ltd. is Located in Yueqing, Zhejiang Province, the capital of China’s electrical appliances, this company is a high-standard manufacturer specializing in the development and production of low-voltage electrical appliances such as moulded case circuit breaker, Air circuit breaker, miniature circuit breaker, leakage circuit breaker, control and protection switch, dual-power automatic switching switch, isolation switch and so on.

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  • Cast First Class Automatic Transfer Switch Quality

    One Two Three Electric Co,.Ltd as the largest and most professional automatic transfer switch manufacturer in China, the quality of automatic transfer switch determines the future development of our company. Therefore, in the field of automatic transfer  switch, we always uphold such a policy: f...

  • Automatic Transfer Switch Working Mode and Fire Protection Function

    1.Automatic transfer switch (ATS)working position of contact Three-position:Contact can stay in the main and standby power on and double three working position. All the motor drives are three-position automatic transfer switch without two positions. Two-position: Ccontact can only stay in two wo...

  • Happy May Day,Automatic Transfer Switch Keep Your Vacation Power Continuous

    One Two Three Electric automatic transfer switch accompanyyour vacation and keep your vacation power  continuous. Dear customer, Thank you for your continuous trust and support to One Two Three Electric Co., Ltd. and our dual power automatic transfer switch board products.The May Day is coming an...

  • The Parameters and Functions of Automatic Transfer switches

    1. The utilization category of automatic  transfer switch To understand the use of dual power automatic transfer switch utilization category,the first step is to find out the nature of the current used by the dual power automatic transfer switch.The current nature of the dual power transfer switc...