Analysis Of High Temperature Resistance Performance Of Insulating Contact Box And Introduction Of Usage Scenarios
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Based on high-voltage insulation principles, we know that the electrical breakdown process of epoxy bushing is similar to that of gases: impact ionization creates an electron avalanche. When the electron avalanche is strong enough, it destroys the dielectric lattice structure, leading to the breakdown of epoxy resin bushing. The highest voltage per unit thickness that several insulating materials used in epoxy resin cast bushing can withstand before epoxy bushing manufacturer breakdown, or what is known as the intrinsic breakdown field strength, is relatively high. In particular, epoxy bushing for transformer has an Eb of ≈20 kV/mm.
