We make a powerful uninterruptible power supply based on a standard UPS by connecting two KAMAZ batteries to it. We also do automatic ventilation when switching to offline mode.

Such is the reality that Russian power grids force consumers themselves to take care of the stability of the electricity they receive. In our case, it is necessary to solve two important problems: a large voltage drop (typical for the hot / cold season, when the air conditioners / electric heaters turn on) and a complete blackout (“knocking out” of machines, accidents at substations, etc.).

If the first problem is easily solved by installing an autotransformer, which allows to obtain a stable voltage of 220 volts at the output, then the second requires the organization of an uninterruptible power system, designed for a long battery life ...

An article on how to choose a professional electrician.

If you fall into pessimism, and from its "heights" look at your apartment, the picture, I tell you, seems joyless. It turns out that our apartment is an endless source of disasters.

Let's start with the smallest - you can fall out of the window (if you look through the eyes of a pessimist, it will be obvious), from the balcony you can fall. The bathroom is just a crowd of disasters. The toilet is clogged, the taps are leaking, the risers are breaking through, as a result, the neighbors are drowning. But the worst danger is the wiring ...

Garden lighting design is divided into two areas. The first includes technical issues that an electrical engineer deals with, and in the second case, the architect determines how organically the technical elements fit into the overall composition of the garden.

When illuminating an open space, the main thing is decorative design and ensuring normal orientation in space. In addition, outdoor lighting is often used to protect and provide traffic.

Types of lighting are divided into technical, decorative, flood and accompanying. All types are compatible with each other.

There is an easy way to create coverage of the territory is the uniform arrangement of the same type of fixtures. This method is great for lighting alleys, paths, and areas of your garden. Most often, floor lamps are used, the design of which has three fundamental stylizations: high-tech, functional and antique. The effectiveness of their work with competent lighting design does not depend on stylization.

For low-voltage devices, power 6, 9, 12 or 27 V is often supplied from a laboratory autotransformer (LATR). And since the current consumption in this case is several amperes, wear (erosion) of the winding turns occurs at the contact point of the current collector, the LATR begins to “jam”.

The performance of the LATR is fully restored if the low-voltage voltage is removed from other turns of the autotransformer. It is enough to connect the load between the current collector and the second terminal "220 V", making an additional output "Load 2" from it. Now, when the current collector moves from it to the lower position, the voltage will change from 0 to 30 V, when the slide moves in the opposite direction, the voltage is regulated in the range 0 - 220 V. Moreover, the low-voltage voltage is removed from the undamaged sections of the transformer winding ...

If you live in a house that was built 10-15 years ago, then you probably have already touched on the problems that arise with electrical wiring.

To begin with, at that time our life was not saturated with such a large number of household appliances that consume electricity. Accordingly, the wiring in old houses was done based on a small electricity consumption.

Mostly the electrical wiring was laid by builders using aluminum wires and, often, without grounding. Our time makes higher demands on wiring. But not every landlord understands that it is quite easy to change electrical wiring in a single room or the whole apartment on your own and it’s not at all necessary to turn to electricians.

Advantages of self-replacement of wiring: when shutting down the walls of hired workers, they are not at all interested in how well you covered the furniture from dust, whether you moved things to a place inaccessible to dirt - they usually work “all along the front”, and dust and dirt happen many. With independent work, you plan your activity yourself, if necessary, you can even take out all things from any room ...

Surprisingly, a fact. Yesterday, a good friend of mine, a homemade friend of mine, called me to see why the circular did not start. He says that before she worked perfectly, then a neighbor took her for a while, and now the circular does not start. The peculiarity of the machine was that it installed a two-kilowatt three-phase electric motor, included in a single-phase network according to the "triangle" scheme, with two blocks of capacitors - working and starting.

To determine the malfunction, we first measure the resistance of the motor windings. The resistance of the windings is usually tens of ohms. In this case, the resistance very quickly changes from zero to the maximum value. This is affected by the effect of capacitors. While they are charging, the resistance drops to zero. As the capacitors charge, the resistance increases, and when the capacitors are fully charged - their resistance equals infinity, so the ohmmeter shows the resistance of the motor windings ...

A nozzle made with your hands will protect the small child from electric shock.

It is known that children like to touch sockets with their fingers, insert cloves and scissors there. They probably subconsciously try to imitate their parents in this way. In this case, the child’s hands may be exposed to electric current. And needles, small pins, paper clips, screws, screws and nails can remain inside the electrical outlet and cause a short circuit in it. At the same time, a short circuit can be a source of fire in your apartment. To prevent this, of course, you can install a factory outlet with a fuse, or you can make such protection yourself.

To do this, it is necessary to prepare a protective disk made of thin plastic with a thickness of 2-3 mm, dimensions along the inner diameter of the socket for the plug in the socket. Drill two holes for the plug in our disk - false panel ...

Electricity consumption varies with the time of day. In the morning and evening, consumption increases significantly due to the lighting network and household load, during the day - due to industrial consumers. The lowest consumption occurs at night.

Uneven energy consumption leads to an unstable load of power plants, which adversely affects the operation of their equipment. For a uniform load, generators of neighboring power plants are included in parallel operation.

High-voltage power lines included in a single system form a closed ring, which provides two-way power to consumers. When the load increases, additional generators are turned on, and when the load decreases, standby generators are turned off.

All these technical measures are designed to ensure uniform loading of the power system throughout the day. However, in addition to technical measures, there are economic measures. These include a multi-tariff electricity metering system ...