Menu English Ukrainian russian Home

Free technical library for hobbyists and professionals Free technical library


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

Section 1 General Rules

Norms of acceptance tests. Dry current limiting reactors

Free technical library

Encyclopedia of radio electronics and electrical engineering / Rules for the installation of electrical installations (PUE)

Comments on the article Comments on the article

1.8.28. 1. Measuring the insulation resistance of the windings relative to the mounting bolts.

Produced with a megohmmeter for a voltage of 2,5 kV. The insulation resistance must be at least 0,5 MOhm.

2. Testing of reactor support insulation with increased power frequency voltage.

The test voltage of the supporting insulation of a fully assembled reactor is taken according to Table. 1.8.24.

The duration of application of the normalized test voltage is 1 min.

Testing of the support insulation of dry reactors with increased power frequency voltage can be carried out in conjunction with the cell busbar insulators.

See other articles Section Rules for the installation of electrical installations (PUE).

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

Cookies in orbit 02.11.2019

Today, the Cygnus robotic cargo ship left for the International Space Station with a variety of equipment necessary for astronauts.

The cargo weighing about 3,7 thousand kg should be received by the ISS laboratory on Monday

In particular, the astronauts were sent to test a new oven - Zero-G Oven. The electric furnace is designed specifically for operation in microgravity conditions - like on board the ISS. The crew will explore how microgravity affects the baking process, as well as how heat transfer occurs in microgravity.


Among other things, the astronauts are going to bake chocolate chip cookies. It is expected that the study will help in the future to safely prepare foods familiar to earthlings in space. In addition, astronauts benefit psychologically and physiologically from delicious cooked food.

In addition, other equipment was sent to the ISS. This includes a special machine that can turn garbage and plastic waste into raw materials for a 3D printer, as well as equipment needed by the crew during spacewalks later this month. The astronauts will have to fix the magnetic alpha spectrometer, designed to search for antimatter and dark matter.

Other interesting news:

▪ Homework and academic performance

▪ Maxim hSensor platform for development of wearable electronic devices

▪ Graphene filter traps everything but water

▪ MB86064 - 14-bit D/A Converter

▪ Painkiller made from the world's most pungent substance

News feed of science and technology, new electronics

 

Interesting materials of the Free Technical Library:

▪ section of the site Wonders of nature. Article selection

▪ article Serve Mammon. Popular expression

▪ article In which country can prisoners shorten their sentences by reading books and working out on exercise bikes? Detailed answer

▪ African bearded man article. Legends, cultivation, methods of application

▪ article UHF Signal Generator. Encyclopedia of radio electronics and electrical engineering

▪ article Signal generator with a frequency of 60 kHz ... 108 MHz. Encyclopedia of radio electronics and electrical engineering

Leave your comment on this article:

Name:


Email (optional):


A comment:





All languages ​​of this page

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

www.diagram.com.ua

www.diagram.com.ua
2000-2024