High Voltage Insulation Materials

General classification and labeling codes

according to generally as the points, solid insulation materials commonly used in pipe insulation, laminates, insulation film, insulation paper, rubber, plastics, glass, ceramics, mica, etc.; liquid materials are insulating paint, glue, resin, transformer oil, and the liquid material is often a pre-semi solid material; material with nitrogen gas, sulfur hexafluoride.

Classification according to degree of heat is one of the most professional classification;Insulation material is divided into A, E, B, F, H, C and other levels, each corresponding temperature heat levels as follows

Class A insulation — temperature 105 ℃,
Class E insulation — temperature 120 ℃,
Class B insulation — temperature 130 ℃,
Class F insulation — temperature 155 ℃,
Class H insulation — temperature 180 ℃,
Class C insulation — temperature above 200 ℃

Insulation performance and stability of insulation materials will get worse, If the temperature get higher. To ensure the insulation strength, each insulating material has a proper maximum allowable operating temperature. At this temperature insulation materials can be safely used long term, it is easy to exceed this temperature aging destruction.

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