Construction And Repair

Magnetic starters: purpose, device and principle of operation, protection and marking Construction And Repair

For a person far from electrical engineering, a household device seems to be some kind of black box in which something is spinning. Everyone knows about the electric motor, but few know how it rela...

Logic controllers: design and principle of operation of a programmable device Construction And Repair

Some people mistakenly think that the term "controller" comes from the word "control" and implies checking or accounting for something. In fact, this concept came to us from the English language an...

Indoor lighting: how many lumens and watts per square meter are required Construction And Repair

When performing major repairs, people are faced with the problem of calculating the number of lumens per square meter. This calculation is necessary to create good lighting in the room. An experien...

Differences between a magnetic starter and a contactor: by purpose, design, principle of operation and configuration Construction And Repair

When assembling power supply, monitoring and control circuits, confusion can arise in the field of power switching devices. Difficulty is the choice between contactors and magnetic starters. A simi...

Stray currents: causes of occurrence, methods of protection against corrosion of water pipes Construction And Repair

The occurrence of a current in a conductor is due to the potential difference at its ends. Stray currents occur when earth becomes a conductive medium. This phenomenon has a destructive effect on m...

Alternating current and its parameters: the intensity of charge fluctuations in the electrical network, measurement methods Construction And Repair

The directional movement of charged particles under the action of an electric driving force (EMF) is called an electric current, it is variable and constant. In the latter case, the movement of nuc...

Starting current of an electric motor: definition of the concept, features of calculating the indicator Construction And Repair

There is a plate on the electric motors, which indicates the main technical characteristics of the unit: power, speed, etc. However, manufacturers do not talk about such a parameter as inrush curre...

Eddy currents: the history of discovery, ways to reduce the harmful effects of flow forces, the application of this phenomenon Construction And Repair

Eddy currents, or Foucault currents - induction volumetric electric currents formed in conductors due to the time variation of the magnetic field flux acting on them. Since the resistance of large ...

Simple current stabilizer: principle of operation, pulse model, universal adjustable device Construction And Repair

To effectively overcome various interference in the network, it is necessary to use simple current stabilizers. Modern manufacturers are engaged in the industrial production of such devices, due to...

How to find the current strength: ways in practice to find out the value using devices and calculation formulas Construction And Repair

The movement of positively charged particles moving in a single direction is called current strength in physics. At its core, it is a physical quantity that demonstrates the charge that occurs at a...