Parameters of flameproof joints of enclosures of electrical equipment of subgroup PA

Free technical library

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

Appendix 5. Characteristics of explosion-proof connections of explosion-proof equipment

Parameters of flameproof joints of enclosures of electrical equipment of subgroup PA

Free technical library

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

Comments on the article

Table A5.2

Type of flameproof connection	Slit length L, mm	Maximum slot width, mm, for shell volume
Type of flameproof connection	Slit length L, mm	V ≤ 100 cm³	100 < V ≤ 2000 cm³	V > 2000 cm³
Flat and cylindrical connections	6,0 ≤ L < 12,5	0,30	-	-
	12,5 ≤ L < 25,0	0,30	0,30	0,20
	25,0 ≤ L	0,40	0,40	0,40
Control rods and rollers	6,0 ≤ L < 12,5	0,30	-	-
	12,5 ≤ L < 25,0	0,30	0,30	0,20
	25,0 ≤ L	0,40	0,40	0,40
Shafts with sleeve bearings	6,0 ≤ L < 12,5	0,30	-	-
	12,5 ≤ L < 25,0	0,40	0,40	0,40
	25,0 ≤ L < 40,0	0,35	0,30	0,20
	40,0 ≤ L	0,50	0,50	0,50
Shafts with rolling bearings	6,0 ≤ L < 12,5	0,45	-	-
	12,5 ≤ L < 25,0	0,50	0,45	0,30
	25,0 ≤ L < 40,0	0,60	0,60	0,60
	40,0 ≤ L	0,75	0,75	0,75

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:

A New Way to Control and Manipulate Optical Signals 05.05.2024

The modern world of science and technology is developing rapidly, and every day new methods and technologies appear that open up new prospects for us in various fields. One such innovation is the development by German scientists of a new way to control optical signals, which could lead to significant progress in the field of photonics. Recent research has allowed German scientists to create a tunable waveplate inside a fused silica waveguide. This method, based on the use of a liquid crystal layer, allows one to effectively change the polarization of light passing through a waveguide. This technological breakthrough opens up new prospects for the development of compact and efficient photonic devices capable of processing large volumes of data. The electro-optical control of polarization provided by the new method could provide the basis for a new class of integrated photonic devices. This opens up great opportunities for ... >>

Primium Seneca keyboard 05.05.2024

Keyboards are an integral part of our daily computer work. However, one of the main problems that users face is noise, especially in the case of premium models. But with the new Seneca keyboard from Norbauer & Co, that may change. Seneca is not just a keyboard, it is the result of five years of development work to create the ideal device. Every aspect of this keyboard, from acoustic properties to mechanical characteristics, has been carefully considered and balanced. One of the key features of Seneca is its silent stabilizers, which solve the noise problem common to many keyboards. In addition, the keyboard supports various key widths, making it convenient for any user. Although Seneca is not yet available for purchase, it is scheduled for release in late summer. Norbauer & Co's Seneca represents new standards in keyboard design. Her ... >>

The world's tallest astronomical observatory opened 04.05.2024

Exploring space and its mysteries is a task that attracts the attention of astronomers from all over the world. In the fresh air of the high mountains, far from city light pollution, the stars and planets reveal their secrets with greater clarity. A new page is opening in the history of astronomy with the opening of the world's highest astronomical observatory - the Atacama Observatory of the University of Tokyo. The Atacama Observatory, located at an altitude of 5640 meters above sea level, opens up new opportunities for astronomers in the study of space. This site has become the highest location for a ground-based telescope, providing researchers with a unique tool for studying infrared waves in the Universe. Although the high altitude location provides clearer skies and less interference from the atmosphere, building an observatory on a high mountain poses enormous difficulties and challenges. However, despite the difficulties, the new observatory opens up broad research prospects for astronomers. ... >>

Random news from the Archive

Crystal that purifies the air of carbon dioxide 05.08.2017

Scientists at the University of California have developed a "spongy" crystal that can turn carbon dioxide from the air into fuel.

The crystal works by converting carbon dioxide into carbon monoxide, which in turn can be turned into a useful source of energy.

The amount of carbon dioxide in the atmosphere continues to increase. This has prompted scientists around the world to develop cost-effective ways to remove carbon from the atmosphere.

Now the world needs innovative ways to create alternatives to fossil fuels. And converting carbon dioxide into fuel using solar energy is a global research effort.

Scientific equipment produces almost 100 percent pure carbon monoxide, without any other gases such as hydrogen and methane. This is very important in reducing the level of carbon dioxide in the atmosphere.

Other interesting news:

▪ Genes against gravity

▪ Ruggedized memory cards from Silicon Power

▪ Water unmanned taxi

▪ Real-time sequencing

▪ The Arctic is waiting for new records of melting

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ section of the site Cultivated and wild plants. Article selection

▪ article Road of life. Popular expression

▪ article How did the Japanese division of the day into hours differ from the Western one before 1873? Detailed answer

▪ article Umbrella tent. Travel Tips

▪ article Chokeless power supply of fluorescent lamps. Encyclopedia of radio electronics and electrical engineering

▪ article Switching power supplies, 48/24-36 volts 5 amps. 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