The use of plastics in technical applications has increased significantly in recent years. Plastics offer many advantages, including light weight, high strength, and corrosion resistance. Nevertheless, it is important to choose the right plastics and take certain precautions when using them in conjunction with electricity and high voltages. In this blog post, we will highlight the most important information you should consider when it comes to engineering plastic parts in use with electricity and high voltages.
Selecting the right plastic is the first step in ensuring that engineering plastic parts can be successfully used in electrical applications. Some of the key plastics that can be used in such applications include:
Polyamide (PA): Polyamides are known for their excellent strength and durability. They are often found in connectors, switches, and housings.
Polyethylene (PE) and polypropylene (PP): These plastics have a high insulating capacity and are ideal for insulators and cable sheathing.
Polyvinyl chloride (PVC): PVC is a commonly used material for cable insulation and housings of electrical appliances.
Polyetheretherketone (PEEK): PEEK offers an excellent combination of electrical insulation capacity and temperature resistance. It is often used in high-voltage applications.
Choosing the right plastic depends on the specific needs of your application. Be sure to consider the electrical and mechanical properties of the material to ensure that it can withstand the high voltages and temperatures.
For engineering plastic parts used in electrical applications, electrical insulation is of paramount importance. Make sure that the selected plastic has the required insulating capacity. This can be done by testing the material for its dielectric constant and dielectric strength. Insulation failures can lead to dangerous flashovers that can cause damage or injury.
High voltages often generate heat. Make sure that the chosen plastic has the necessary temperature resistance to handle the heat that occurs. PEEK and other high-performance plastics are known to tolerate high temperatures. It is important to consider the specific operating temperatures of your application.
Moisture can affect electrical performance and cause corrosion. Make sure the plastic is moisture resistant, especially if your application is operating in a humid environment.
The mechanical strength of the plastic is also important. High voltages and electric fields can create mechanical stresses in the material. Choose a plastic with sufficient mechanical strength to prevent cracking or breaking.
It is advisable to test and certify engineering plastic parts for electrical properties and safety before using them in high-voltage applications. This ensures that they meet the requirements and standards.
Finally, regular maintenance and monitoring of the engineering plastic parts in electrical applications is crucial to ensure long-term safety and reliability. Check regularly for signs of wear, damage, or loss of performance.
Overall, engineering plastics offer many advantages for use in electrical applications with high voltages. With the right selection and care, they can work reliably and safely. However, keep in mind the above aspects to ensure that your application works successfully and without incident.
