electrical insulating materials. Polyethylene insulation. Scheme, description

ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
Free library / Electrician

electrical insulating materials. Polyethylene insulation. Encyclopedia of radio electronics and electrical engineering

Free technical library

Encyclopedia of radio electronics and electrical engineering / Electrical materials

Comments on the article

Polyethylene insulation Manufactured from low density polyethyleneLDPE) and high density polyethylene (HDPE). LDPE is produced by polymerization of ethylene at high pressure, and HDPE - at low pressure using organometallic catalysts. LDPE-based composition markings include three-digit numbers starting with one: 102, 107, etc. HDPE-based markings - numbers starting with two: 204, 206, 207, etc.

The electric strength for polyethylene insulation (PEI) with a thickness of 1 mm at a frequency of 50 Hz is 35-40 kV/mm. The dielectric constant at a frequency of 1 MHz varies within 2,3-2,4 F/m. Tangent of dielectric loss angle at the same frequency - ranging from 2*10^-4 up to 7*10^-4.

Application of PEI reflected in the table. 1.3.

Table 1.3. Applications for polyethylene insulation

Polyethylene insulation

Author: Koryakin-Chernyak S.L.

See other articles Section Electrical materials.

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

Air trap for insects 01.05.2024

Agriculture is one of the key sectors of the economy, and pest control is an integral part of this process. A team of scientists from the Indian Council of Agricultural Research-Central Potato Research Institute (ICAR-CPRI), Shimla, has come up with an innovative solution to this problem - a wind-powered insect air trap. This device addresses the shortcomings of traditional pest control methods by providing real-time insect population data. The trap is powered entirely by wind energy, making it an environmentally friendly solution that requires no power. Its unique design allows monitoring of both harmful and beneficial insects, providing a complete overview of the population in any agricultural area. “By assessing target pests at the right time, we can take necessary measures to control both pests and diseases,” says Kapil ... >>

The threat of space debris to the Earth's magnetic field 01.05.2024

More and more often we hear about an increase in the amount of space debris surrounding our planet. However, it is not only active satellites and spacecraft that contribute to this problem, but also debris from old missions. The growing number of satellites launched by companies like SpaceX creates not only opportunities for the development of the Internet, but also serious threats to space security. Experts are now turning their attention to the potential implications for the Earth's magnetic field. Dr. Jonathan McDowell of the Harvard-Smithsonian Center for Astrophysics emphasizes that companies are rapidly deploying satellite constellations, and the number of satellites could grow to 100 in the next decade. The rapid development of these cosmic armadas of satellites can lead to contamination of the Earth's plasma environment with dangerous debris and a threat to the stability of the magnetosphere. Metal debris from used rockets can disrupt the ionosphere and magnetosphere. Both of these systems play a key role in protecting the atmosphere and maintaining ... >>

Solidification of bulk substances 30.04.2024

There are quite a few mysteries in the world of science, and one of them is the strange behavior of bulk materials. They may behave like a solid but suddenly turn into a flowing liquid. This phenomenon has attracted the attention of many researchers, and we may finally be getting closer to solving this mystery. Imagine sand in an hourglass. It usually flows freely, but in some cases its particles begin to get stuck, turning from a liquid to a solid. This transition has important implications for many areas, from drug production to construction. Researchers from the USA have attempted to describe this phenomenon and come closer to understanding it. In the study, the scientists conducted simulations in the laboratory using data from bags of polystyrene beads. They found that the vibrations within these sets had specific frequencies, meaning that only certain types of vibrations could travel through the material. Received ... >>

Random news from the Archive

VIPER26K regulators with built-in MOSFET 1050 V 26.11.2019

STMicroelectronics has announced new microcircuits of the well-known ViperPlus family. This is a Viper26K with a built-in 1050V drain-to-source MOSFET.

This family of microcircuits is suitable for building power supplies with a wide range of input voltages, for example, those operating from a three-phase 380 V network.

Chips VIPER26K have two versions - with a transistor current limit of 500 mA and 700 mA. With their help, the following topologies can be implemented: isolated and non-isolated flyback converter (flyback), buck converter (buck), buck-boost converter (buck-boost).

Technical advantages:

Built-in MOSFET with a voltage of 1050 V;
Built-in quick start function;
Built-in short circuit current protection;
Built-in error amplifier for non-isolated topologies;
Consumption at idle no more than 40 mW;
Automatic overtemperature protection with hysteresis;

Main Applications:

IP powered by a three-phase network;
Three-phase electricity meters.

Other interesting news:

▪ Trap for positrons

▪ Only the old man Hottabych can survive in a copper jug

▪ Wine with gold content tastes better

▪ Six channel 5.1 headphones

▪ Environmentally friendly cooling agent

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ site section Measuring equipment. Article selection

▪ article Tsar Hunger. Popular expression

▪ article When and who laid the foundation for cardiac surgery? Detailed answer

▪ article Occupational safety of teenagers. Directory

▪ article Electroceramic materials and glasses. Encyclopedia of radio electronics and electrical engineering

▪ article Scheme, pinout (pinout) of Siemens S25/C/M/S35 cable. Encyclopedia of radio electronics and electrical engineering

Leave your comment on this article:

All languages of this page

Home page | Library | Articles | Website map | Site Reviews