Power transformers in India comprise of a variety of different types of transformers like toroidal, auto, variable, induction regulator, polyphase, grounding, phase-shifting, resonant, isolating, and many others. Out of all these, the two main types of transformers popularly used are step-up and step-down transformers. While the step-up transformers convert low voltage on the primary side of windings to high voltage on the secondary side, step-down transformers convert high voltage on the primary to low voltage on the secondary. This makes step-down transformers that most popular and reliable ones for residential applications as they reduce the high inrush of voltage coming from power lines to a safe level that is acceptable by both appliances and operators.
Step-down transformers working depends upon the way they are designed, and the number of windings they have on the primary and secondary. The formula used to determine the functioning is [Ns/Np = Vs/Vp], where Ns is the number of turns on the secondary, Np is the number of turns on the primary, Vs is the voltage on the secondary, and Vp is the voltage on the primary. This means that when the number of turns on the primary is more, the voltage is also more.
Now that we know the basic principle on which step-down transformers work, let us also look at how they work. First and foremost, the voltage level is determined. The voltage is set at a high level for a long distance transmission of energy. Transmission systems at different voltage levels are connected to a power grid, and it is a step-down transformer that acts as an interconnection for these transmission systems. The high voltage set up is thus decreased with the help of these step-down transformers. Next, the transmission voltage is changed to suit the distribution level, which is done through a step-down transformer fitted with an on-load tap changer that regulates the voltage level. The typical voltage ratios in such conditions are 110/20kV and 220/20kV. The voltage is then adjusted according to the voltage level that is best suited for operating different electrical devices, equipment, or machinery used. This is why these transformers are also rightly known as small distribution transformers, and have a nominal power of up to 5kVA.
Because of their functioning and performance in the above mentioned way, step-down transformers are the best options used for operating several household and commercial electrical devices that require a lower voltage than the high voltage of main power lines. But, it is also essential to get good quality step-down transformers to avoid any kinds of failures and hazards. Miracle Electronics is a name you can blindly trust to provide you with the best quality step-down transformers for your applications. In fact, you can get all kinds of power transformers in India here that have been exclusively designed to provide the highest level of safety to the operator by regulating and stepping down voltages to machine tool control devices. Their design enables control circuits to be isolated from all power and lighting circuits, thus permitting flawless use, and assuring greater safety to the operator. Thus, you can keep it safe with these power transformers that are REACH and RoHS compliant, and are also available with CE and UL marks on request.