Construction And Repair

Short-circuit voltage: causes, consequences and protection against negative phenomena, calculation of the current Construction And Repair

Short-circuit voltage - the voltage value that is applied to one of the transformer windings so that an electric current appears in the circuit. The rest of the windings should be short-circuited a...

Leakage current in the power grid: causes and methods of determination Construction And Repair

Any technical infrastructure wears out over time. In many old buildings, it is in poor or unsatisfactory condition. Leakage currents can occur in electrical networks, which leads to many problems. ...

Premises with increased danger: classification of objects according to the risks of electric shock Construction And Repair

Industrial facilities and shopping centers cannot function without electrical equipment. Because of this, there is a need to classify rooms with increased danger, which allows for appropriate contr...

Generator device: three-phase alternating current, linear and phase currents and voltages Construction And Repair

A system of three sinusoidal currents that change over time and have a phase shift is called three-phase alternating current. With the help of this system, convenient and economical electric motors...

Undercurrent relay: general information about the device and its types, safety rules Construction And Repair

An undercurrent relay is a protective device that helps prevent sudden changes in the network and protect various electrical devices from damage. Its principle of operation is based on voltage cont...

Types of electric shock: general information, classification, first aid rules Construction And Repair

Electric current is an irreplaceable source of energy that is widely used in all spheres of human activity. However, one should not forget that electricity can be not only beneficial, but also harm...

What effect does electric current have on the human body?Construction And Repair

The impact of electric current on the human body is unique and versatile. Passing through the human body, electric current produces thermal, electrolytic, mechanical and biological effects.ContentI...

Varistor device: description of the principle of operation, main parameters, characteristics and marking Construction And Repair

The varistor is used in electronics and is installed to provide protection of devices from voltage surges. Its resistance can vary and depends on the voltage supplied to the device, it varies in th...

Protective grounding: concept and features of the system operation mechanism Construction And Repair

The discovery of the current marked a new era in the development of mankind. It is impossible to imagine a comfortable existence of a modern person without energy carriers. But a new kind of energy...

Instrumentation: types and characteristics, classification and operation Construction And Repair

The development of human civilization, the desire and need of man to transform the environment make him constantly compare, measure, weigh or count something. To facilitate and perform regularly oc...