Each consumer, powered by an electric network, consumes some power. Power characterizes in this case the speed of the electrical network performing the work necessary for the operation of a particular device or circuit, which is powered from this network. Of course, the network must be able to provide this power and not be overloaded at the same time, otherwise an accident can occur.

To measure power consumption in alternating current circuits, special devices are used - wattmeters. Wattmeters show the current power consumption, and some of them are even able to calculate the amount of energy in kilowatt hours spent for a certain time while the consumer was working. In this article, we will consider several main types of power meters. Wattmeters are used in various fields of industry and everyday life, especially in the electric power industry and in mechanical engineering ...

The modern world is so electrified that the number of wired connections and electrical networks can no longer be counted. Consumers of various purposes have not been connected with bare wires for a long time, and even power lines are no exception.

SIP wire (short for "self-supporting insulated wire") is successfully used in many networks, industrial and domestic, which is by no means accidental. The fact is that wires of this type differ in a number of advantages, which we will talk about later. When compared with other brands of wires, the SIP is truly unique. It is designed to transmit electrical energy, while it is positioned just like a wire, and not like a cable, although it carries itself, has insulation, is multi-core - almost like a cable. Take for example a wire of the SIP-1 brand 3x150 + 1x70. There are three insulated cores ...

For more than a year now, as in residential buildings, it is again allowed to use aluminum alloy wiring. At the same time, quite often copper cables are also available in one apartment - the situation is acceptable, but requires special attention, since there is a problem of the correct transition from copper to aluminum. Consider the best solutions.

According to the Electrical Installation Rules, direct contact of aluminum with copper is prohibited: it provokes strong oxidation at the junction, due to which the contact resistance increases, the wiring heats up and burns. It is necessary to take this into account when choosing the connection option - the terminals, clamps or sleeves must be adapted specifically for the transition from copper to aluminum. For example, construction and mounting terminals (SMK) are designed to connect from two to eight conductors with a cross section of up to 4 mm2 on the principle of copper-copper, copper-aluminum, aluminum-aluminum ...

Already in 2007, in one of the reports at the Beijing conference of the International Commission on Lighting, the importance of economy and environmental friendliness of both already used and still being developed, more advanced lighting products was emphasized.

The primary accent was made by the speakers on a more rational and efficient use of light. And this was not at all a call to somehow reduce the illumination. One of the most important steps towards this goal is the development and implementation of energy-efficient and more environmentally friendly light sources - LEDs. LEDs are semiconductor electrical products designed to receive light due to the electric current passing through the pn junction. But not every pn junction emits light.To receive light from a semiconductor, it is necessary ...

Almost all technologies, although they tend to develop, eventually become obsolete. This pattern did not bypass silicon electronics. It is easy to notice that in recent years its progress has slowed significantly and generally changed the direction of its development.

The number of transistors in microchips no longer doubles every two years, as it was before. And today, computer performance is increasing not by increasing their operating frequency, but by increasing the number of cores in the processor, that is, by expanding the capabilities for parallel operations. It's no secret that any modern computer is built of billions of small transistors, which are semiconductor devices that conduct electrical current when a control signal is applied. But the smaller the transistor, the more pronounced spurious effects and leaks ...

Normal operation of a computer and Internet network in a room is often impossible without installing so-called information sockets. Using these outlets, computers and other network devices are connected to each other or to the network using twisted pair cables. This is especially true for large buildings, where there are many computers, which can also often change places due to rearrangements, relocation of offices, etc.

Computer sockets are also needed in residential premises, where Wi-Fi is not always enough, especially when there are several computer (and other Internet-requiring) places, and in each case the highest possible quality of connection is required. The task is solved simply - these sockets can be placed in each room, especially since their installation is absolutely simple, if you have the appropriate knowledge and skill. Let's talk about all this next ...

When installing external wiring or laying some kind of information cable, it is advisable to immediately take care of how best to hide these wires. To solve this problem, special cable channels or plastic boxes are well suited.

Unlike the cable tray, the cable channel or box has a cover, so that the cable in it is closed. In addition, these products are produced today for every taste and color, come in various shapes and sizes, so that anyone who thinks about installing external wiring can choose a cable channel or box that is ideal for certain conditions of home, office or production the interior. The most common are plastic and metal cable ducts made of PVC and aluminum, as well as stainless steel. For administrative and industrial premises are best suited ...

A rectifier is a device for converting AC voltage to DC. This is one of the most common parts in electrical appliances, ranging from a hair dryer to all types of power supplies with an output DC voltage. There are different schemes of rectifiers and each of them to a certain extent copes with its task. In this article, we will talk about how to make a single-phase rectifier, and why it is needed.

A rectifier is a device designed to convert AC to DC. The word "constant" is not entirely correct, the fact is that at the output of the rectifier, in the circuit of a sinusoidal alternating voltage, in any case there will be an unstabilized pulsating voltage. In simple words: constant in sign, but varying in magnitude.Stabilized is a voltage that does not change in magnitude regardless of load ...