An air bushing in Figure 1a and a cross section of this bushing in Figure 1b
is seen. Here, two layers with relative dielectric constants ?r1=1 and ?r2=6
voltage of 36kV in a three-phase bushing consisting of different insulating layers
has been applied. Conductor diameter is 2 cm and flange diameter is 18 cm.
a) In the first layer (air,
Ed1=30 kV/cm) to avoid any discharge
Calculate the maximum air layer thickness.
b) if aair=0.6cm is selected since aair is the thickness of the air layer
Calculate the maximum electric field strength values ??in the layers.
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