Insulation application range of mica tube

Mica tubes often use oil or gas as the insulating medium, and are generally made into transformer bushings or circuit breaker bushings, and are often used for voltage levels below 35 kV. The inner cavity between the conductor of the insulating tube and the porcelain sleeve is filled with transformer oil for radial insulation. When the voltage exceeds 35 kV, the conductor is covered with an insulating tube or cable to strengthen the insulation. Mainly used for ultra-high voltage transformers and circuit breakers.

Mica tube is a substance with high resistivity and low conductivity. Generally it is used to insulate current and heat insulation. Insulating materials can be used to isolate live conductors or conductors of different potentials, so that the current flows in a certain direction. At the same time, it also plays a role in heat dissipation, cooling, support, fixation, arc extinguishing, improvement of potential gradient, moisture-proof, mildew-proof and conductor protection.