1, for the power line, the primary reclosing gate once the primary reclosing gate fails, the line is in a loss of voltage and blackout state, need to be manually dealt with, and the secondary reclosing gate is different, once the primary reclosing gate is not successful, there is another reclosing opportunity after the time delay, the success rate of the closing gate is higher, with a caused by the tiny metal Short circuit, often burned off in the first reclosing, the fault is automatically excluded, the second reclosing power will be successful, which is a reclosing gate does not have
2, the scope of application of the two are different, the secondary reclosing gate is generally used for high-voltage long-distance lines