Asynchronous motors are widely used in industry due to the relative simplicity of design, good performance, ease of control.

Such devices often fall into the hands of a home master and he, using knowledge of the basics of electrical engineering, connects such an electric motor to work from a single-phase 220 volt network. Most often it is used for emery, wood processing, grain grinding and other simple work.

Even on individual industrial machines and mechanisms with drives, there are samples of various engines that can operate on one or three phases. Most often, they use a capacitor start, as the most simple and acceptable, although this is not the only method known to most competent electricians. Industrial asynchronous electrical devices ...

Any electrician periodically encounters the need to lay electrical wiring inside concrete or brick walls, which have to be drilled or ditched. Performing such tasks is more convenient with a specially designed rotary hammer.

In order to successfully select his model for work, we suggest that you familiarize yourself with the features of various designs and a list of technical solutions for their implementation, embodied in the diverse designs of rotary hammers produced by modern manufacturers.

The puncher is created for making holes in concrete, brick, stone building structures of increased strength by the method of applying mechanical blows to a nozzle making a combined translational-rotational movement. Additional tasks of the punch are: drilling holes in various materials due to the function of a drill, applying a long series of axial impacts ...

Instead of the introduction: in the grammar dictionaries of the Russian language there are no definitions of the words “stroba” or “strobe”. The online service “” does not know them either.

But the Wikipedia joint folk art encyclopedia combines these two terms into one name and sends it to the technical literature: PUE, GOST 21.201-2011.

In these documents, the term "furrow" is used, which is created in the walls to hide electrical wiring or pipelines. This technique not only improves the design of the premises, but also creates additional mechanical protection for the laid communications from damage. However, in colloquial speech among electricians, the word "strobe" is more familiar. A professional tool for cutting them is called a chisel cutter even by manufacturers. Therefore, in the article we will adhere to the prevailing folk traditions ...

When planning electrical work, in particular when it is necessary to select cable and wire products, the question arises of choosing between a flexible and a hard cable. In this article, we will consider which cable is better: flexible or rigid, depending on local conditions.

First, consider what a flexible and rigid cable is. The flexible cable is multi-core, which provides it with sufficient flexibility. A rigid cable is single core, that is, its conductive core consists of one conductor.

The main distinguishing feature of a flexible cable from a rigid one is the possibility of bending it an unlimited number of times, as well as the ease of bending. Mono-core cable is not intended for frequent bends, it can be bent a certain number of times, after which its conductive core will break. For example, a new copper hard cable is able to withstand ...

Convenience of lighting control is one of the basic rules that guide the installation of electrical wiring. If the room is relatively small in area, then to control the various lighting devices mounted in this room, one light switch is enough.

In the event that the room is large enough or extended, then for the convenience of controlling the fixtures installed in it, it is more expedient to provide for the possibility of their inclusion from two or more places. To realize this possibility, passage and cross switches or bistable relays are used. Below we briefly describe both methods of controlling lighting devices, and give their main advantages and disadvantages. Through and cross switches have the principle of work similar to traditional switches of lighting. Switching lighting circuits ...

As you know, in Soviet times, electricity meters of induction type were used to account for the consumed electric energy. Nowadays, these metering devices can be found less and less, electronic metering devices have replaced them. How justified is this transition? To answer this question, we give 10 advantages of electronic energy meters compared to induction.

The first and most significant advantage is a higher accuracy class and, accordingly, a smaller error in the results of measuring the amount of electrical energy consumed.

Previously, in conditions of a relatively low cost of electricity, the accuracy of induction metering devices was quite enough. Now the situation is different. One of the main tasks of the electricity supply companies is to maximize the accuracy of the generated ...

All residents of the entrance, or rather, the left riser, a nine-story house built in the 80s were in trouble: suddenly the motors of old refrigerators, washing machines, power supplies for computers, cordless phones and some other household appliances burned out. True, one person noticed that the light bulbs increased sharply and reacted quickly - turned off the opening automatic power supply.

The rest are out of luck. Many were generally at work and could not do so. They learned about the incident in the evening. Of course, they began to turn to the housing and communal services, to demand explanations, compensation for damage.

The director of public utilities got into the situation and was forced to satisfy most of the requirements: he paid for the repair of expensive equipment, but after submitting various documents and certificates. How much time and nerves it took for people is better not to describe. The reason for the incident is simple ...

To equip their customers with high-quality electrical equipment, electricians must know which circuit breakers of which companies should be preferred. And in order to make a conclusion about the quality of the machine, it is important to monitor operational malfunctions and know their design.

For this, the designs of automatic machines of three different companies were compared: ABB (Germany), IEK (Russia) and E.NEXT (China).

Structurally, all three machines were very similar and had all the necessary elements, such as: an arcing chamber, a bimetallic plate, a coil. Only by looking closely, it was possible to see the difference.

At the first stage, an ABB circuit breaker made in Germany was dismantled. The products of this manufacturer are considered one of the best in the world. About 30 of these devices were replaced in the electrical panel large supermarket, for a reason...