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Epoxy pipe manufacturers introduce the definition of insulating materials

Epoxy pipe manufacturers introduce the definition of insulating materials

According to the national standard GB2900.5, the definition of insulating materials is: “materials used to electrically insulate devices”. That is, an insulating material that blocks the passage of electricity. Its resistivity is very high, usually in the range of 10-10Ω·m. As in a motor, the insulating material around the conductors isolates the turns and from the grounded stator core to ensure the safe operation of the motor.

Materials composed of substances with a resistivity of 109 to 1022 Ω•Cm are called insulating materials in electrical technology, also known as dielectrics. Simply put, it is a material that isolates a charged body from other parts. The insulating material has a very large resistance to DC current. Under the action of DC voltage, it is practically non-conductive except for a very small surface leakage current. For AC current, there is a capacitive current passing through, but it is also considered to be non-conductive. Conductive. The higher the resistivity of the insulating material, the better the insulating performance.

In electrical technology, insulating materials usually refer to materials with resistivity greater than 10 to the 9th power Ω.cm. The function of insulating materials is mainly to isolate the live parts of different potentials in electrical equipment.

Therefore, insulating materials must have good dielectric properties, that is, they must have high insulation resistance and compressive strength, and be able to avoid accidents such as leakage, creepage and breakdown; secondly, the heat resistance of insulating materials is better, mainly to It is guaranteed that there will be no performance changes due to long-term heating; in addition, it has good thermal conductivity, moisture resistance, high mechanical strength, and convenient processing.

Insulation materials commonly used by electricians can be divided into inorganic materials and organic materials according to different chemical properties. There are three types of insulating materials and mixed insulating materials.