What are paperboard strips?

Paperboard strip, as an insulating material, refers to a long thin sheet product made of pulp or fiber material through a special process, which has good electrical insulation performance. It is usually used in electrical equipment as an insulating support or separation material for coils, windings, layers, etc. to prevent short circuits or leakage between different potentials.

Performance characteristics of paperboard strips

1. Excellent insulation performance: Paperboard strips have a high resistivity and can effectively prevent the passage of current, thereby ensuring the safe operation of electrical equipment.

· Insulation performance indicators of paperboard strips include:

Breakdown strength: Paperboard strips will be damaged and lose insulation performance under the action of an electric field strength higher than a certain value. The higher the breakdown strength, the better the insulation performance of the paperboard strip.

Insulation resistivity: Paperboard strips will always have a small leakage current passing through them under the action of voltage. The higher the insulation resistivity, the better the insulation performance of the paperboard strip.

2. Good heat resistance: The paperboard strips can maintain stable performance at higher temperatures. It is not easy to burn, and has certain fire resistance.

3. High mechanical strength: The paperboard strips have good tensile strength and compressive strength, and can withstand certain external forces and pressures.

4. Environmentally friendly and degradable: The paperboard strips are made of paper materials, which are degradable and environmentally friendly.

Application of paperboard strips in electrical equipment

1. Transformer

In transformers, paperboard strips are one of the most widely used insulation materials. It is mainly used for insulation between coils, insulation between coils and iron cores, and insulation of leads. For example, in oil-immersed transformers, paperboard strips are immersed in transformer oil and form a good insulation system together with transformer oil, which effectively prevents short circuits and leakage between coils and ensures safe operation of the transformer.

2. Motors

The motor will generate heat and electromagnetic force during operation, and has high requirements for insulation materials. Paperboard strips can be used for stator winding insulation, rotor winding insulation, and slot insulation of motors. It has good insulation and mechanical properties, can withstand vibration and impact during motor operation, and ensure the normal operation of the motor.

3. Power capacitors

Power capacitors need to withstand high voltages and electric field strengths, and have very strict requirements for insulation materials. As one of the insulating media of power capacitors, paperboard strips together with other insulating materials constitute the insulation structure of the capacitor to ensure the insulation performance of the capacitor under high voltage.

4. Switchgear

In high-voltage switchgear, paperboard strips can be used for insulation between contacts, insulation of isolating switches, and insulation of operating mechanisms. Its high insulation resistance and dielectric strength can ensure the safety and reliability of switchgear during the opening and closing process.

With the continuous development of electrical technology, the performance of paperboard strips will continue to improve, and the application field will be further expanded. At the same time, environmental protection and composite will become important development directions of paperboard strips as insulation materials, providing strong guarantees for the safety, reliability and sustainable development of electrical equipment.