Vacuum circuit breakers

Free technical library

ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
Free library / Encyclopedia of radio electronics and electrical engineering / Electrician

Annex 3. Standards for testing electrical equipment and apparatus for electrical installations of consumers

Vacuum circuit breakers

Free technical library

Encyclopedia of radio electronics and electrical engineering / Rules for the technical operation of consumer electrical installations (PTE)

Comments on the article

K - produced within the time limits established by the PPR system.

Name of the test	Type of test	Test norms	Directions
13.1. Measurement of insulation resistance of secondary circuits and EMU	К	Manufactured in accordance with Section 28
13.2. High voltage insulation test:
1) Circuit breaker insulation test	К	The value of the test voltage is taken according to Table. 5 (Appendix 3.1)
2) Testing the insulation of the secondary circuits and windings of the EMU	К	The test must be carried out in accordance with the instructions in section 28
13.3. Checking the minimum operating voltage of the EMU	К	EMU should operate at voltages: closing electromagnets - 0,85 U_Mr. opening electromagnets - 0,7 U_Mr.
13.4. Testing circuit breakers by multiple trials	К	The number of operations of complex cycles should be: (3 ± 5) closing and opening operations (2 ± 3) B-O cycles without time delay between operations	Tests are carried out at rated voltage at the terminals of electromagnets
13.5. Checking the characteristics of the circuit breaker		Manufactured in accordance with the manufacturer's instructions
13.6. Thermal imaging control	М	Produced in accordance with established standards and manufacturer's instructions

See other articles Section Rules for the technical operation of consumer electrical installations (PTE).

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

Machine for thinning flowers in gardens 02.05.2024

In modern agriculture, technological progress is developing aimed at increasing the efficiency of plant care processes. The innovative Florix flower thinning machine was presented in Italy, designed to optimize the harvesting stage. This tool is equipped with mobile arms, allowing it to be easily adapted to the needs of the garden. The operator can adjust the speed of the thin wires by controlling them from the tractor cab using a joystick. This approach significantly increases the efficiency of the flower thinning process, providing the possibility of individual adjustment to the specific conditions of the garden, as well as the variety and type of fruit grown in it. After testing the Florix machine for two years on various types of fruit, the results were very encouraging. Farmers such as Filiberto Montanari, who has used a Florix machine for several years, have reported a significant reduction in the time and labor required to thin flowers. ... >>

Advanced Infrared Microscope 02.05.2024

Microscopes play an important role in scientific research, allowing scientists to delve into structures and processes invisible to the eye. However, various microscopy methods have their limitations, and among them was the limitation of resolution when using the infrared range. But the latest achievements of Japanese researchers from the University of Tokyo open up new prospects for studying the microworld. Scientists from the University of Tokyo have unveiled a new microscope that will revolutionize the capabilities of infrared microscopy. This advanced instrument allows you to see the internal structures of living bacteria with amazing clarity on the nanometer scale. Typically, mid-infrared microscopes are limited by low resolution, but the latest development from Japanese researchers overcomes these limitations. According to scientists, the developed microscope allows creating images with a resolution of up to 120 nanometers, which is 30 times higher than the resolution of traditional microscopes. ... >>

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 ... >>

Random news from the Archive

Frost protection for LED headlights 13.11.2020

The Finnish company Canatu announced the creation of a film that will help protect the LED headlights of cars from freezing.

Owners of cars with LED headlights will have a difficult choice - either put up with frosting on the optics, or attach a warm heated cap on top. More and more modern cars are switching to LED optics - such headlights have become an attribute not only of premium models, but also of quite budget cars. And all owners suffer from one problem - freezing headlights in cold weather.

Car headlight lenses are made of plastic, which does not allow them to be equipped with a heating system, which can lead to deformation or clouding of the element. The heat emitted by halogen or xenon incandescent lamps is sufficient to heat the lens and, while maintaining its integrity, prevent snow from freezing while driving.

LEDs, which are energy efficient, do not emit as much heat, so headlights covered with dirt or snow in the cold become covered with ice crust. If the optics are not equipped with a powerful washer, then the headlights quickly lose their transparency.

The Canatu CNB solution, developed by Finnish specialists, is designed to solve this problem, which is a transparent plastic cap with a heated film built into it. Technically, it is possible to make Canatu CNB of any shape, which will allow it to be installed on top of standard LED headlights without compromising their efficiency, but protecting them from freezing.

Canatu CNB can be adapted for radar, lidar, video cameras and other elements of the unmanned driving system - traditionally, these numerous sensors are also subject to pollution and freezing, which reduces safety while driving. Therefore, the company believes that their warm film will help the creators of the autopilot.

Other interesting news:

▪ Recognition of dogs by nose pattern

▪ A trainable computer chip that works like a brain

▪ Himiway electric bikes Pony, Rambler and Rhino models

▪ Connecting with loved ones helps you live longer

▪ The most dangerous virus on earth

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ section of the Radio Control website. Article selection

▪ article Not one iota. Popular expression

▪ article Why do they give water to calm down? Detailed answer

▪ article Safety at work and in an educational institution

▪ article Radio frequency eavesdropper finder. Encyclopedia of radio electronics and electrical engineering

▪ article The appearance of a handkerchief in empty hands. Focus Secret

Leave your comment on this article:

All languages of this page

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