• The role of the contactor

    The role of the contactor

    The contactor is an automatic electromagnetic type electric appliance, which is suitable for frequently connecting and disconnecting AC and DC main circuits and large-capacity control circuits over long distances. It is mainly used in automatic control of AC and DC motors, electric heating equipment... read more

    Mar 06,2020 News
  • Design principles of PLC control system

    Design principles of PLC control system

    The essential difference between a programmable controller and a traditional relay control system is the use of the scanning mode and the concept of a relay. PLC system design includes two parts: hardware design and software design. The design method of parallel development of hardware and software ... read more

    Feb 28,2020 News
  • Line protection link

    Line protection link

    1. Short-circuit protection When a short circuit occurs, the main circuit is cut off by the fuse of the fuse FU. In order to expand the protection range, the fuse is as close to the power supply as possible in the line, and is generally installed directly under the knife switch.   2. Overload protec... read more

    Feb 22,2020 News
  • Zero and under voltage protection

    Zero and under voltage protection

    When the motor is working normally, if the motor stops due to the disappearance of the power supply voltage, the motor may start automatically when the power supply voltage is restored. The self-starting of the motor may cause personal or equipment accidents. For the power grid, the self-starting of... read more

    Feb 14,2020 News
  • Features of programmable controller

    Features of programmable controller

    The programmable controller is developed from the relay control system. Due to the application of microprocessor and electronic technology, PLC has the following characteristics:   1.High reliability PLC adopts many anti-interference measures, such as electromagnetic shielding of CPU module, setting... read more

    Feb 10,2020 News