Applications and Specifications of Power Transformers
There are several Power transformer manufacturers India who provide transformers at the best price across the globe. The transformers operated in the voltage range of 33 Kv, 220 Kv, 765 Kv, 110 Kv, 66 Kv, 220 Kv are known as power transformers. They are used for both step up and steps down purposes. The purpose of the power transformer is to transmit and receiving current. The load fluctuation is very low in the power transformers because the load is not directly connected.
The three-phase transformer is reasonable to make. It has fewer functions, and the footprint of the three-phase transformer is small. It also has high efficiency. But the single-phase is even cheaper when compared to the three-phase. There are several kinds of transformers that are used for several purposes in different situations. Without a transformer, it would have been difficult for several power plants and industries. Now, let's see how power transformers are used. Applications of Power transformers ● Power transformers are used for transmitting and receiving functions. ● The transformers installed at the sending or receiving finish of long high voltage transmission lines are the power transformers.
● Power transformers are utilized in transmission networks of upper voltages for the increase and reduction application (400 kV, 200 kV, 110 kV, 66 VK, thirtythree VK). They are usually rated on top of 200 MVA. ● Power transformers usually have one primary and one secondary and one input and output. ● The performance of the power transformers is sometimes judged from industrial efficiency. ● In electrical power devices, the density is higher than the distribution transformer. ● The Power transformers are mainly used in power stations.
● The power generated from the power plants is transmitted using the power transformers. ● The power transformers can also act as step-up transformers and step-down transformers. ● The voltage can be increased and decreased according to our needs in the power transformers. ● In addition, the power transformers are used to interconnect the two power stations. ● Power transformers are used to relay higher voltages. ● They are used in the places where power is required to be generated. ● The rating availability of the power transformer can be 33 kV, 66 kV, 110 kV, 200 kV, 400 kV.
● The maximum rating of the power transformer will be up to 200 MVA. ● The size of the power transformer is bigger. ● Power transformers are designed in a way so that they can give 100 % efficiency. ● The efficiency of the transformer is measured by the ratio of output power to input power. ● In this power transformer, the losses of copper and iron are seen throughout the day. ● The load oscillations are significantly less in the power transformers.
● The power transformer often works at full load. ● The power transformer does not depend on time. ● The flux density of the power transformer is more. ● It is used for both step-down and step-up voltages. ● The working principle of the power transformer and the distribution transformer is the same. ● The power transformer varies in size and construction. ● KEC is the top leading power transformer manufacturers India, providing 2500 kVA to 100000 kVA up to 220 kV power supply. Specifications of Power transformers The Vector group of a power transformer represents the primary and secondary windings and the phase difference between them. The nameplate in the Power transformers is usually mentioned as Dyn11. Indication of Dyn11: ● D indicates the type of High Voltage winding ● y indicates the type of Low Voltage winding ● n indicates winding has a neutral point ● 11 indicates a phase shift between them, and it is equivalent to 30 degrees. It is universally believed that this phase shift is dependent on the clock phase. The shorter arm indicates the high voltage winding, and the more extended arm indicates the low voltage winding (which is rotating), so one rotation of the
minute arm is 360 degrees. Technically one hour is 30 degrees. So if you divide 360 by 12 hours, you will get 30 degrees. The transformer has a Delta-connected primary winding (D), a phase shift of 30 degrees between them, and a star-connected Secondary winding (y) with neutral (n) Thus, vector groups are important while connecting two transformers parallel. If you connect two transformers with different vector groups in parallel, it may result in a short circuit or some disturbances in the system. Power transformer manufacturers India have got so many branches all over the world. Power frequency Voltage Insulation levels are essential because power frequency voltages can be generated due to ● Phase to earth faults ● Load rejection ● Ferro resonance ● Ferranti effect The power transformer must withstand its voltage, so the transformer's insulation remains healthy even in these situations. Lighting Impulse voltage Lighting impulse can be generated due to lightning strokes as you have seen it is mentioned in the peak. It will remain in the system only for a short time.
Type of cooling techniques In the power transformer, ONAN indicates Oil Natural Air Natural. There are other techniques as well, which include ONAF (Oil Natural Air Forced), OFAF (Oil forced Air forced), OFWF (Oil forced water forced). Hence, these are all the techniques used to cool the power transformer. Taps are provided on the high voltage winding. If your high voltage is fluctuating, then accordingly, you can adjust the taps and get the constant output at secondary that is 433 volts. So, this specifies the connections where you have to connect the taps to get the constant voltage. It also gives you the amperes based on the connection at high voltage. Conclusion Several varieties of transformers help us in different ways. In the same way, power transformers lessen the power supply and have many advantages compared to other transformers.