In damp rooms, garage boxes in the "pit", and other safety rooms, it is required to install lamps with 12 Volt lamps. To power such lamps, a step-down transformer is used.

In addition to conventional transformers, electronic pulse transformers have recently appeared on sale. However, when used to power the luminaires, a voltage of 12 volts with a long wire length of the lamp starts to burn dimly, at full heat. Let's try to solve this problem.

Recall physics. The power of an incandescent lamp is 60 watts, the voltage from the transformer is 12 volts, from here we calculate the current: 60/12 = 5 amperes. If a current of 5 Amps flows through 220 Volts, then the power will be 1.1 kW. With a large current, a voltage drop occurs, the voltage drop depends on the length of the wire and its cross section. A voltage drop of 5-6 volts at a voltage of 220 volts is not so noticeable, but at 12 volts this is half the voltage ...

What advantages can the housing and communal services get when switching to energy-saving LED products? Comparison of a conventional NBP lamp with an LED analogue.

Housing and communal services is one of many enterprises that will without fail have to soon switch to energy-saving technologies, and the transition will be guaranteed by the State, which is strictly aimed at radical measures, namely the transition to energy-saving LED products.

Our topic will be related, first of all, what energy-saving products are offered for this sphere and what benefits can be obtained when using these products? ...

This figure shows a simplified wiring diagram for connecting a switch, outlets, and lamps. It is quite common and is widely used in the electrification of residential apartments, basements, garages, industrial, construction objects, etc. And now let's deal with this scheme in more detail.

For a better understanding, the connection diagram of the switch, sockets and lamps is drawn as it is usually located during its installation.

Let's start with the electrical panel. Each house and apartment must have a shield to which the input from the main power line (from the nearest power pole or from the main distribution panel on the site) is suitable ...

The principle of operation of this device and the pros when using it.

As you know, incandescent lamps and the so-called halogen lamps very often fail. This is often due to unstable mains voltage and the very frequent inclusion of lamps. Even if low voltage lamps (12 volts) are used through a step-down transformer, still the frequent switching on of the lamps leads to their rapid combustion. For a longer service life of incandescent lamps, a device for smoothly switching on lamps was invented.

A device for smooth starting of incandescent lamps ignites the lamp spiral more slowly (2-3 seconds), thereby eliminating the possibility of lamp failure at the time of filament ...

If you have a magnetic starter with burned-out contacts or a broken case, but with a whole 220 Volt coil and a magnetic circuit, then you can make a transformer of not high power and any voltage with it yourself, but from it a charger.

Previously, when there was a malfunction of the magnetic starter, I simply dismantled it for parts or assembled one normal out of two three faulty magnetic starters.Recently I was looking for a transformer to make a charger for AAA batteries (mini-finger type). Three of these batteries are in my flashlight. But recently I came across a magnetic starter with burned out contacts. I disassembled it, I look, there is a 220 Volt coil, there is a magnetic circuit, it remains only to wind the secondary winding and the transformer is ready ...

Today, the use of expensive household electrical appliances in your life plays a fundamental role in comfort and greatly facilitating the performance of various work. But how often do electrical appliances fail? What is the main reason for the cessation of their functioning and how to protect electrical appliances from premature failure?

Today, almost all imported equipment has units protecting the device from power surges, which burn out with a high voltage surge, but do not allow the device to completely fail. However, the electrical appliance must be taken to a repair shop to replace the fuses.

How to secure electrical appliances in your home or office?

The manufacture of removable wiring for the garden.

I work as an electrician in our garden community. Most of the houses in our gardening are single-story, summer. It is difficult to protect such a house from looters. Now, when prices for non-ferrous metal have risen, the devastating raids on holiday villages from autumn to spring have become constant.

In my house I made removable wiring. He recommended and helped do the same to his neighbors in the country. Now we do not need to restore power to our garden house from scratch. I think that this method of maintaining electrical wiring in the country will interest gardeners and gardeners ...

Reason for switching to energy-saving LED products. Comparison and simple mathematical calculation of the savings and benefits of the purchase in the long run.

Today, many talk about new energy-saving technologies. That in the near future the traditional "Ilyich bulbs" will live out their Century and a new era is coming, or rather the electrical LED revolution.

This issue has risen to the state level. Starting with the President, who gave instructions to the state corporations Rosstekhnologii and Rusnano, to introduce energy-saving technologies, due to the fact that electricity is not used up efficiently and it is time to break stereotypes and keep up with the times. Factories will be built in a short time on the territory of Russia, where they will produce LED products ...

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 electrician without power tools, this is not an electrician. After all, no matter what knowledge you might have, it is impossible to strip the wire, tighten the contact, measure electrical parameters, etc. without the appropriate tools. This is what every electrician should have his own and with him, as they say without a tool as without hands.

There is a huge amount of all kinds of tools, both for a specific purpose and all kinds of species.

Perhaps I think that you completely agree with me that having in your house a lot of any various things, you usually have to use only a small part of them, namely the most necessary. So in an electrician, you can carry many tools in a bag, although in practice only some of them are constantly used. This is the electrician’s tool, the main set ...

This circuit of connecting an electric meter (single-phase and three-phase) is called direct. It is the most simple and quite common in its use in practice in everyday life.

According to the norms, up to 3 kW is allocated for one apartment (for apartments with an electric stove - 7 kW). At this power, the current will lie within 13.5 A.

On the counters there is an inscription about its characteristics, among which the rated and maximum currents are indicated (for example, it is usually written like this: 5 - 15 A, or 10 - 40 A.). Since the counter current lies in the normal aisles of the current consumption, they are connected in a direct way (without additional current transformers).

Despite the huge variety of electric meters produced, the location of the connection terminals they all have the same. On the terminal cover itself (on the inside) there is a drawn connection diagram (just in case, if you forgot how to connect the meter) ...

Comparison of a conventional ceiling LVO lamp with an LED analogue.

The revolutionary Age of lighting is approaching. The best universal technology for lighting equipment, selected at the state level, is energy-saving LED technology. And technological innovations appear, there are a huge number of them, they replace like ordinary incandescent lamps, spotlights, architectural and interior lighting. There are solutions for offices, and in general, for their upcoming construction, using cost-effective lighting devices.

Namely, where I drove everything, in the last sentence, these are LED lamps built into the ceiling. Let's see if there is a benefit in its use and how economical is this device?