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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  • Basic principle of automatic transfer switch appliances ATS

    1. An overview of how ATS works Automatic transfer switch appliance is abbreviated as ATS, is the abbreviation of Automatic Transfer switching equipment. The ATS is mainly used in emergency power supply systems to automatically switch load circuits from one power supply to another (standby) power...

  • What is an air circuit breaker and what is its main function

    1. Air switch An air switch, also known as an air circuit breaker, is a type of circuit breaker. It is a power switch that automatically cuts off only when the current in the circuit exceeds the rated voltage. The air switch is a very important electrical appliance in the distribution room networ...

  • Selection of dual power automatic transfer switch

    In recent years, due to the sharp increase of China’s ATSE  market, production enterprises (especially CB level ATSE enterprises) have also increased rapidly.The automatic transfer switch equipment(ATSE)  is very important. With the continuous development of social productivity and the impr...

  • What’s the difference among the ATS, EPS and UPS? How to choose?

    ATS (YES1 series products) referred to as Automatic Transfer Switch or Dual Power Transfer Switch is mainly made of the components of molded case circuit breaker MCCB  (CB) or isolating switch (PC).  According to the provisions of the national standard GB/T14048.11-2008, it is divided into three ...