This standard specifies the performance requirements for a pole-mounted load switch system with a frequency of 50Hz and a voltage level of 10kV and its ancillary equipment. It fully takes into account the outdoor use conditions, working power supply requirements, insulation performance requirements, electromagnetic compatibility requirements and other requirements of the product. Other test items besides type test, routine test, and sampling test reflect the characteristics that the column-mounted load switch system product should have and fill the gaps in domestic standards.