Build days

Harmonics in electrical networks: what they are and how they are dangerous

Oct 28, 2021

Ideally, there should be an alternating voltage in the electrical network, which changes according to a sinusoidal law with a frequency of 50 Hz (5...

Renewal of the power supply contract upon change of owner

Oct 28, 2021

Power supply to any property is carried out on the basis of an agreement concluded between the owner of the property and the power supply organizat...

Star and delta in an electric motor: connection principle and differences

Oct 28, 2021

All loads in three-phase circuits are connected in a star or delta pattern. Depending on the type of electricity consumers and the voltage in the p...

Resistor marking with colored stripes and numbers

Oct 28, 2021

When assembling electrical circuits, the radio amateur often has to deal with the determination of the value of unknown components. The resistor is...

Foucault eddy currents: causes and applications

Oct 28, 2021

There are a number of phenomena in electricity that professionals need to know. Although not all information can be useful in everyday practice, so...

Self-induction: definition, formula, practical application

Oct 28, 2021

"Self-induction stops the voltage rise in inductive circuits." If your work or hobby is connected with electricity, you have probably heard such st...

Interference in the power grid: causes and methods of protection

Oct 28, 2021

Interference in the power supply is preventing or impairing reception of signals. The sources of such obstacles can be not only external, but also ...

Types and types of electrical circuits, their characteristics and purpose

Oct 28, 2021

An electrical diagram is a document in which, according to the rules of GOST, the connections between the components of devices operating due to th...

Input distribution devices (ASU): purpose, types, equipment

Oct 28, 2021

In electrics and power engineering, the decoding of the abbreviation VRU is an input-distribution device, sometimes it is also called UVR. This ele...

Dielectric losses in dielectrics

Oct 28, 2021

Everyone knows that a dielectric is a material that prevents electric current from passing through. There are a huge number of such materials and s...