The dielectric strength of PMP insulating paper

Dielectric strength of PMP insulation paper

The dielectric strength of PMP insulating paper refers to the Polyester MylarPaper (PMP) insulating paper’s ability to resist damage under the action of electric field. As an important insulating material, PMP insulating paper is widely used in the electrical field, and its dielectric strength is one of the important indexes to evaluate its electrical insulation performance.

PMP insulating paper is composed of polyester fiber and cellulose fiber and has excellent electrical properties and mechanical strength. It has a series of advantages, such as high mechanical strength, stable insulation performance, good heat resistance, strong moisture resistance and so on. These properties make PMP insulating paper an ideal material for a variety of electrical equipment.

Importance of PMP Dielectric Strength

Dielectric strength refers to the voltage value of the material under specified conditions to withstand the electric field strength without conducting electricity. In the practical application of PMP insulating paper, the importance of dielectric strength is reflected in the following aspects:

First, the dielectric strength directly affects the working voltage of the insulating paper. High dielectric strength means that the material is able to withstand higher voltages, making it able to carry a larger voltage load in the power system. Therefore, when selecting insulating materials, the working voltage of the equipment must be taken into account to ensure that the dielectric strength of the insulating paper can meet the working requirements.

Second, the dielectric strength is closely related to the life of the insulating material. In the long-term use of insulating paper, it may be affected by electric field, temperature and other factors and occur aging which can result in a decrease in dielectric strength. If the dielectric strength is lower than the required operating voltage of the equipment, it is easy to occur electrical breakdown accidents and result in equipment failure. Therefore, the selection of insulating paper with high dielectric strength can improve the life and reliability of the equipment.

Third, the dielectric strength is also closely related to the thickness of the insulating material. Generally speaking, the dielectric strength of insulating paper is proportional to the thickness. Thicker insulating paper can withstand higher voltages, but it also increases the volume and cost of the device. Therefore, when designing the insulation system, it is necessary to choose a thin insulating paper as far as possible under the premise of meeting the working voltage to reduce the volume and weight of the equipment.

In order to ensure the dielectric strength of PMP insulating paper, the process parameters need to be strictly controlled during the production process.

The first is the amount of cellulose fiber. The appropriate amount of cellulose fiber can increase the mechanical strength of the paper and improve the damage voltage of the paper.

The second is the density of the paper. Too high or too low density will affect the dielectric strength.
At the same time, it is also necessary to control the humidity and temperature of the paper, which can prevent the moisture absorption rate of the paper from being too high or excessive drying.

In short, the dielectric strength of PMP insulating paper is one of the important indexes to evaluate its electrical insulation performance. High dielectric strength can increase the operating voltage and life of the equipment, while reducing the volume and weight of the equipment. The manufacturer should ensure that the process parameters are strictly controlled during the production process to ensure the quality and performance of the insulating paper. When selecting insulation materials, we should reasonably select PMP insulating paper with dielectric strength meeting the requirements according to application scenarios and requirements to ensure the safe and reliable operation of the equipment.

Ztelec Group is a professional manufacturer of high-quality electrical insulation materials with more than sixty-five years of manufacturing experience. If you need more product information and quotes, please contact us.