A transformer is a static machine used for transforming power from a single circuit to a different one without changing frequency. This really is a standard concept of transformer. While there is no rotating or moving part so transformer is actually a static device. Transformer operates on ac supply. Transformer works on the principle of mutual induction.
If we should be aware of past of transformer we now have return long within the 1880s. Around fifty years 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 larger capacity of Power transformers for sale in all the different several KVA, MVA came into existence. In 1950, 400KV electrical power transformer was introduced in high voltage electrical power system. In the early 1970s, unit rating as large as 1100 MVA was produced and 800KV and also higher KV class transformers were produced in year of 1980.
Generation of electrical power in low voltage level is incredibly much cost effective. Theoretically, this low voltage level power might be transmitted on the receiving end. This low voltage power if transmitted results in greater line current which indeed causes more line lossesBut if the voltage amount of a power is increased, the actual of the power is reduced that causes decline in ohmic or I2R losses inside the system, decline in cross sectional portion of the conductor i.e. decline in capital price of the program and it likewise increases the voltage regulating the program. Because of these, low level power has to be stepped up for efficient electrical power transmission. This is achieved by step up transformer on the sending side from the power system network. Because this high voltage power might not be given to the consumers directly, this should be stepped right down to the preferred level in the receiving end with the aid of step down transformer. Electrical power transformer thus plays a crucial role in power transmission. power system Two winding transformers are often used where ratio of high voltage and low voltage is in excess of 2. It really is cost-effective to use auto transformer where the ratio between high voltage dexjpky57 low voltage is lower than 2. Again an individual unit three phase transformer is more cost effective than a bank of three 200kv power transformer within a three phase system. But a single three phase transformer unit is a little challenging to transport and really need to be pulled from service entirely if one of the phase winding breaks down.
Forms of Transformer
Transformers might be categorized in a different way, based upon their purpose, use, construction etc. The types of transformer are as follows,
Improve Transformer and Step Down Transformer – Generally employed for stepping all around the voltage level 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 since it is affordable than later. But once size matters, it can be preferable to employ a bank of three single phase transformer since it is much easier to transport than one single three phase transformer unit.
Electrical Power Transformer, Distribution Transformer and Instrument Transformer – Power transformers are often found in transmission network for stepping up or down the voltage level. It operates mainly during high or peak loads and contains maximum efficiency at or near full load. Distribution transformer steps across the voltage for distribution purpose to domestic or commercial users. They have 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 employed to reduce high voltages and current to lesser values that may be measured by conventional instruments.
Two Winding Transformer and Auto Transformer – Former is normally used where ratio between high voltage and low voltage is higher than 2. It is actually cost effective to make use of later where the ratio between high voltage and low voltage is less than 2.
Outdoor Transformer and Indoor Transformer – Transformers that are designed for installing at outdoor are outdoor transformers and transformers made 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 it provides two vertical legs or limbs with two horizontal sections named yoke. Core is rectangular in shape by using a common magnetic circuit. Cylindrical coils (HV and LV) are positioned for both the limbs.
Shell type transformer: It comes with a central limb and two outer limbs. Both HV, LV coils are placed about the central limb. Double magnetic circuit is there.
Berry type transformer: The core looks like spokes of wheels. Tightly fitted metal sheet tanks are used for housing this type of transformer with transformer oil filled inside.