What is the protective ground and what is it for?

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Definition of protective earthing and its concept

When speaking about what is called protective earthing, it should be noted that this term refers to the intentional electrical connection of a separate part of an electrical installation( most often a hull) with a special grounding device that is implemented to ensure electrical safety. This measure should protect the person touching the hull or any other part of the electrical installation.

Determination of protective earthing and its concept

It is important to note that the smaller the value of the grounding device used, the better it can cope with its task - you can see this by any example. And you can take advantage of all the possibilities of the technology in question if you purchase sockets equipped with a grounding contact. However, even such devices should be selected thoughtfully, and therefore every person dealing with electrical installations should know what is the protective earthing of electrical installations and how to organize it.

In the event that an insulation fault occurs between the active phase and the enclosure of the electrical installation, the latter may fall under stress. And it is natural that if a person touches the device at this time, it can have sad consequences for him. A grounding and protective measures of electrical safety make it possible to prevent electric shock. Moreover, such a system will be directly from earthing switches and special conductors.

Determination of protective earthing and its concept

Working zeros and protective earthing: differences in technology and conductors

When considering the earthing device, it is important to note that the earthing switches can be both natural( metal structures of buildings and structures that are connected to ground) and artificial( steel pipes, corners and rods).Well, depending on the type of conductors used, a protective circuit and a working ground loop can be created.

Working zero and protective earthing: differences in technology and conductors

The working zero conductor is designed to power electrical installations, and therefore its cross-section reaches such values ​​that it is possible to pass the operating current. A protective conductor allows you to create a short-duration short-circuit current, which ensures a quick disconnection of the electrical installation, the operation of which was broken, from the mains. That is, the purpose of protective earthing is precisely to ensure human security. And it is this one that gets the most spread these days.

Because most specialists use a variety of mobile conductors( steel pipes, neutral wires, no switches and fuses, etc.), they create a portable protective earth. And the calculation of the system under consideration will depend directly on what materials were used in the process of its creation, and to ensure the safety of the operation, which installation it is used for.

Working zero and protective earthing: differences in technology and conductors

Principle of protective earthing

Special protective earthing can be used in a residential building or in a dacha, in a working room or at work. And to understand its principle of action is necessary not only for specialists involved in the immediate performance of work in this area, but also for ordinary people. Note that the purpose of using the system under consideration is to reduce the step voltage and touch to safe values. And the touch of voltage and step in this case can be caused, either by a short circuit to the case, or by other reasons. And the installation is carried out in such a way as to effectively reduce the potential of a particular equipment or to equalize the potentials of the equipment and the base on which the person is at the moment of contact.

Principle of operation of protective earthing

There are certain rules for protective earthing, which directly affects its effectiveness. Experts are well aware of such rules and try to abide by them. Therefore, it is very important that portable protective earthing of all types be mounted exclusively by people with appropriate qualifications. Only in this case it can be ensured that the process will be performed correctly, in accordance with all requirements and norms, and that the final result will be able to demonstrate high efficiency.

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