• 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
  • Commonly used low-voltage electrical classification

    Commonly used low-voltage electrical classification

    Because there are many types of low-voltage electrical appliances, their functions are diverse, they are widely used, and their working principles are different, so there are different classification methods. According to its relationship with the use of the system, it can be divided into the follow... read more

    Jan 21,2020 News
  • About the outline classification of relays

    About the outline classification of relays

    Classification according to the overall dimensions of the relay: 1. Miniature relay: a relay with the longest side size not greater than 10 mm. 2. Subminiature miniature relays: Relays with the longest side larger than 10 mm but not larger than 25 mm. 3. Miniature miniature relay: The relay with the... read more

    Jan 11,2020 News