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.

News

Service First

  • Judgment and treatment of circuit breaker “false closing”

    If the circuit breaker closes automatically without operation, it is a “false closing” fault. Generally, it should be judged as follows. After inspection, it is confirmed that the operation is not closed. If the handle is in the “back” position and the red light flashes co...

  • Debugging steps of dual power automatic transfer switching equipment

    1. Place the automatic switch of dual power supply on the debugging table, connect the corresponding power line according to the correct phase sequence, and connect the phase line to the neutral line (neutral line) according to the position, and do not connect wrong. 2.During the debugging of the...

  • Danger of the air switch being connected backwards

    For ordinary air switch wiring can also be used, can also play the role of overload short circuit protection, but this will be dangerous in operation, for general electricians, it is believed that the air switch port is the incoming line of the power supply, the lower port is the outlet of the po...

  • Trip curve of circuit breaker

    Origin of trip curve The concept of trip curve originated in the IEC world and is used to classify micro-circuit breakers (B, C, D, K and Z) from IEC standards. The standard defines lower and upper limits for trips, but manufacturers have the flexibility to determine the precise specifications wi...