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Study on the Factors Influencing the Insulation Performance of NHN Insulating Paper

The composition of NHN insulating paper is a layer of polyimide film and Nomex 1 paper (Dupont paper) compounded on both sides of it (see below). Its heat-resistant grade is H (180 C). NHN insulating paper is a composite insulating material with good mechanical properties. However, under the influence of some factors, its insulation performance can not be fully developed. Next we will explore the specific factors that affect its performance.

1. Burning resistance: refers to the flame resistance of NHN insulating paper and the self-extinguishing ability when it leaves the flame. With the increasing application of insulating materials in society, the requirements for their fire resistance are becoming more and more stringent. Relevant professionals have been experimenting with different materials in order to increase the fire resistance of insulating materials. The higher the fire resistance of insulating materials, the higher their safety.

2. Mechanical strength: refers to the maximum strength that NHN insulating paper can bear under the corresponding pressure. This experiment is also the most representative one in the performance test of NHN insulating paper.

3. Arc resistance: Under rated voltage conditions, NHN insulating paper can resist the arc action on its surface. In the laboratory, the arc resistance is tested by judging the time required to form a conductive layer on the surface of NHN insulating paper with AC high voltage and small current. The longer the arc resistance is, the better the arc resistance is.

4. Sealing degree: The convective substance has a high tightness. It has good mechanical strength and voltage resistance. Its surface is smooth to ensure that it is trouble-free in use.

Because of its good performance, NHN insulating paper is mainly used for inter-slot, cover and inter-slot insulation of high heat-resistant motors. In addition, NHN insulating paper can also be used for inter-layer insulation of transformers or other electrical appliances.

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