A power transformer is a large-sized device that is used to transfer electrical energy from a main source over long distances. Most often, it has two windings (maybe more) that convert voltage and make it suitable for use in homes, enterprises and other institutions. For this, the device has an alternating magnetic field.
A power transformer can be step-down (distributes the energy flow) and step-up (transfers voltage over long distances), depending on how it should "remodel" the voltage. It should be noted that before the current gets from the station to residential areas, it is converted several times.
The principle of operation of the unit is based on the phenomenon of mutual induction. Both windings are involved here. In the first, when electricity enters into it, a magnetic flux is formed alternatingly , which creates an electromotive force in the second winding. If an energy receiver is connected to the second winding, then a current begins to pass through it. In this case, the voltage will already be converted.
It should be noted that the power transformer has unequal voltage in both windings. This parameter determines the type of unit. If the secondary voltage is lower than the primary, then the device is called step-down, otherwise it will be step-up.
As for the windings, they most often have a cylindrical shape. Near the magnetic circuit itself there should be a lower voltage, since it is easier to isolate. Between the windings there must be an insulating gasket.
A power transformer is a large enough device that requires time, strength and caution to install. Electrical specialists with permission to carry out such work should do this. First of all, the unit is delivered to the installation site. To do this, use a large truck or platform on rails. In the territory where all the work will be done, opportunities should be arranged for the entrance and operation of loading and installation vehicles and equipment.
Installation of power transformers must be carried out in accordance with the requirements of safety rules. The site should be equipped with all the necessary equipment, as well as all the necessary equipment for fire fighting. Telephone must be established at the work site. Next, you need to provide good lighting installation site.
If all the preparatory work has been completed, then it is necessary to thoroughly inspect the power voltage transformers for poorly installed parts, cracks or other damage. It is also necessary to check the input using the test voltage.
After installation, the units must be carefully checked. If problems were noticed during the tests, then they must be eliminated. If the deficiencies cannot be fixed on the spot, then the device must be sent to production, where it will be carefully inspected and repaired.