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Shielded Ring
Sep 05, 2018

Shielded ring

Shielding ring: ring metal fittings that do not show corona in the shielded area.

The function of the shielding ring is to protect the fittings and control the corona on the fittings. For lines and substations above 220 kV, strong corona will occur when the point gradient of metal tools (including clamps, hanging plates, bolts and other parts with edges and corners) and wire surface is greater than the critical value due to the high voltage. To eliminate the corona, shielding rings must be installed to avoid the electric field. No corona discharge.