The industrial computer small current grounding line selection device is suitable for small current grounding system. In case of fault, it can select the fault line in time. It also has tripping function, which can quickly isolate the fault within the time limit and save manpower.

        The industrial computer small current grounding line selection device is upgraded from the ordinary small current grounding line selection device. According to the requirements of China Southern Power Grid, the device is further optimized and improved. The industrial computer small current grounding line selection device adds the functions of wheel cutting and post acceleration to ensure that the line selection device can quickly select and cut off the fault line under various types of grounding fault conditions, so as to ensure the reliability of power supply and personal safety.

        The post acceleration function of low current grounding line selection of industrial computer can accelerate the tripping of line selection device in the case of permanent fault due to line reclosing, quickly remove the fault, and greatly shorten the removal time of fault line. The round cutting function is applicable to the case of tripping line selection failure or high resistance grounding fault, When the grounding line selection device fails to correctly select the line and trips in case of fault, the wheel cutting function shall be started to cut the line in turn until the fault line is removed, which has the advantages of intelligence, rapidity and labor saving.

        The adaptive function of the operation condition of the low current grounding line selection device of the industrial control computer is also a great advantage. The device can judge according to the changes of the on-site operation condition, such as the position changes of the section switch and the interconnection switch of the ring network structure, so as to ensure the correct action of the line selection device. Generally, the online amplitude of zero sequence current collected by small current grounding line selection device is 30V. When the zero sequence current in the system exceeds 30V, the small current grounding line selection device acts. However, the adaptive function of small current grounding line selection of industrial computer can be changed according to the actual situation of the site after adapting to the on-site operating conditions. For example, at the beginning, the upper limit amplitude of the small current grounding line selection device of the industrial computer is 30V, but after the small current grounding line selection device is installed on site and operates stably on site, the adaptive function of the small current grounding line selection device of the industrial computer can increase or decrease the amplitude according to the actual situation on site.