The characteristics of post insulators

1, post insulators are in line with GB8287.1 "High voltage post insulators technical conditions" and GB12744, "Fog type outdoor post insulators of ceramic rod" requirement, in line with international standards IEC168 "nominal voltage higher than 1000 V system users inside and outdoor post insulators of porcelain or glass test "and IEC publication 815" insulators in polluted environments selection guidelines "requirement.

2, high mechanical strength insulator, dispersion is small, safe and reliable operation.

3, good low-temperature mechanical properties of the insulator.

To test the products, low temperature mechanical properties, Songliao Water Resources Commission of Water Branch laboratory simulation of outdoor winter cold temperature changes, for ZSW1-110 / 4-type insulators freeze test. After several temperature cycles, the test crystals at low temperatures do bend destruction test. Experimental results show that the insulator at -40 ℃ condition bending failure strength compared to no significant changes with temperature.

4, excellent stain resistance.

Anti-contamination insulator depends largely on the performance of the product structure and the umbrella skirt shape. This has done a lot of work. By design optimization, artificial pollution test preferred and preferred natural pollution tests to finalize the size of the white umbrella, under the umbrella of ribbed insulator sheds. The research sheds with a rated voltage of 126kV, 252kV bending failure load of not less than 12kV, insulators creepage distance 25mm / kV, in 0.12mg / cm 2 ESDD, can long withstand the maximum operating phase voltage, Level III insulator creepage distance can withstand IV level ESDD contamination. Rated voltage 550kV creepage distance of 25mm / kV insulators can run long at 0.06mg / cm 2 ESDD. Stain insulator leading domestic level, it tolerated ESDD value climb above the same distance, and other one-third of the miter skirt similar products. Northeast Electric Power Research Institute by the artificial contamination of insulation withstand voltage test results show that the creepage distance of 31mm / kV insulators highest tolerated salt density of 0.25mg / cm 2.

5, high-level resistance to earthquakes.

Rated voltage 252kV, 550kV insulators, Water Resources and Hydropower Research Institute in Beijing were anti-seismic intensity 9 performance tests, the results of the test intact.

6, radio interference is low.

Rated voltage of 550kV insulators at 1.1 times the maximum operating phase voltage, radio interference is not greater than 500μV, sunny evening no visible corona, visible corona voltages up to 450kV.