A transformer can be a static machine employed for transforming power from a single circuit to another one without changing frequency. This is a very basic definition of transformer. While there is no rotating or moving part so transformer is actually a static device. Transformer operates on ac supply. Transformer works in the principle of mutual induction.
If we want to know the history of transformer we certainly have return back long from the 1880s. Around half a century before that in 1830 property of induction the working principle of transformer was discovered. Later the transformer design was improved contributing to more efficiency and lesser size. Gradually the big capacity of Power transformers for sale in all the different several KVA, MVA came into existence. In the year 1950, 400KV electrical power transformer was introduced in high voltage electrical power system. In early 1970s, unit rating as large as 1100 MVA was produced and 800KV and also higher KV class transformers were created in year of 1980.
Generation of electrical power in low voltage level is quite much affordable. Theoretically, this low voltage level power might be transmitted for the receiving end. This low voltage power if transmitted brings about greater line current which indeed causes more line lossesBut in the event the voltage degree of an electrical is increased, the actual from the power is reduced which in turn causes lowering of ohmic or I2R losses in the system, decline in cross sectional part of the conductor i.e. decrease in capital expense of the program and it also increases the voltage regulation of the device. Because of these, low level power should be stepped up for efficient electrical power transmission. This can be done by improve transformer in the sending side of your power system network. As this high voltage power may not be given to the consumers directly, this has to be stepped as a result of the preferred level at the receiving end with the aid of step down transformer. Electrical power transformer thus plays a vital role in power transmission. power system Two winding transformers are typically used where ratio of high voltage and low voltage is in excess of 2. It is cost-effective to use auto transformer the location where the ratio between high voltage dexjpky57 low voltage is less than 2. Again one particular unit three phase transformer is much more economical when compared to a bank of three 500kv power transformer in the three phase system. But one particular three phase transformer unit is hard to transport and really need to be removed from service entirely if one of many phase winding reduces.
Forms of Transformer
Transformers can be categorized differently, depending upon their purpose, use, construction etc. The types of transformer are listed below,
Boost Transformer and Step Down Transformer – Generally useful for stepping up and down the voltage measure of power in transmission and distribution power system network.
Three Phase Transformer and Single Phase Transformer – Former is generally utilized in three phase power system because it is cost-effective than later. However when size matters, it really is preferable try using a bank of three single phase transformer because it is simpler to transport than a single single three phase transformer unit.
Electrical Power Transformer, Distribution Transformer and Instrument Transformer – Power transformers are typically employed in transmission network for stepping down or up the voltage level. It operates mainly during high or peak loads and contains maximum efficiency at or near full load. Distribution transformer steps along the voltage for distribution purpose to domestic or commercial users. It provides good voltage regulation and operates 24 hrs a day with maximum efficiency at 50% of full load. Instrument transformers include C.T and P.T which are utilized to reduce high voltages and current to lesser values which is often measured by conventional instruments.
Two Winding Transformer and Auto Transformer – Former is often used where ratio between high voltage and low voltage is more than 2. It is actually cost-effective to use later where ratio between high voltage and low voltage is less than 2.
Outdoor Transformer and Indoor Transformer – Transformers that are equipped for installing at outdoor are outdoor transformers and transformers created for installing at indoor are furnace transformer.
Oil Cooled and Dry Type Transformer – In oil cooled transformer the cooling medium is transformer oil whereas the dry type transformer is air cooled.
Core type, Shell type and Berry type transformer – In core type transformer they have two vertical legs or limbs with two horizontal sections named yoke. Core is rectangular in good shape having a common magnetic circuit. Cylindrical coils (HV and LV) are placed on both the limbs.
Shell type transformer: It possesses a central limb as well as two outer limbs. Both HV, LV coils are put on the central limb. Double magnetic circuit is found.
Berry type transformer: The core appears to be spokes of wheels. Tightly fitted metal sheet tanks can be used for housing this type of transformer with transformer oil filled inside.