Tap changing arrangement off circuit tap changing switch off circuit tap changing link on load tap changer two earthing terminals lifting lugs drain cum filter valve pressure relief device silica gel dehydrating breather. A transformer has no moving parts and is a completely. Consider the case of charging up a capacitor c which is connected to very long wires. Electric power systems pennsylvania state university. Find materials for this course in the pages linked along the left. Each of these materials is suitable for certain applications. Department of eee svecw page 4 output of the instrument, which needs to be calibrated.
Transformer and generators note pdf download lecturenotes for. Transformer, mutual inductor, uses of transformers, construction of transformers, ideal transformer, complex mutual impedance of a transformer, ideal transformer as a multiplier for potential difference, ideal transformer as a multiplier for current, ideal transformer with a complex load, reflected impedances in equivalent circuits, shunt impedances in equivalent circuit. The core, which makes a path for the magnetic flux. Basic transformer notes transformer alternating current scribd. Below we have list all the links as per the modules. Transformers cannot pass dc voltages transformer saturates when. Department of eee svecw page 5 the deflecting torque is responsible for the movement of the pointer in proportion to the value of the measurand. Explore prime new internship new upload login register.
Basic electrical technology lecturer nptel videos description notes by prof. Umanand, principal research scientist, power electronics group, cedt, iisc bangalore for more detail. They vary in size from miniature units used in electronics to huge units used in power stations. Transformers are widely used in many applications in radio and electronics. A transformer consists of two electrically isolated coils and operates on faradays principal of mutual induction, in which an emf is induced in the transformers secondary coil by the magnetic flux generated by the voltages and currents flowing in the primary coil winding. The purpose of a transformer is to change electrical. Here is an example in which current does not gives rise to the magnetic field. Many of the handouts will be in portable document format pdf. The two windings of the transformer are called high voltage winding and low voltage winding. Basic electrical engineering pdf notes bee pdf notes. Lecture 6 ecen 45175517 stepup dcdc converter with isolation. Here you can download the transformers and generators vtu notes pdf tg pdf vtu of as per vtu syllabus. Develop transformer equivalent circuits from opencircuit and short. Transformer are the static electrical device which transmit the power at different voltage level at same frequency.
Introduction to transformers construction, working. Acknowledgmentthese handouts and lecture notes given in class are based on material from prof. Transformers vary considerably in construction, size and shape depending on their application. Chapter 2 transformers part 1 notes, electrical machines, electrical engineering. If you dont already have a viewer for pdf files, you can download the foxit reader or download the acrobat reader. Transients in rl, rc and rlc circuits with dc excitation. Transformers increase voltage, decreasing current in power systems. Nptel provides elearning through online web and video courses various streams. It is provided by the different effects of electric current on which the operation of the given instrument depends. These are commonly used in applications where there is a need of ac voltage conversion from one voltage level to another. Umanand description about all chapters i consider this as lecture 2 meaning the first part the motivation as 1, the second part the course contents as 2 and the lecture 3 which will be of course the next hour. Threephase voltages are raised or lowered by means of threephase transformers. Distribution voltages are typically medium voltage, between 2.
It can be designed to step up or step down voltages and works on the magnetic induction principle. These notes are based in part on alternating current circuit theory by g. In largescale system studies, even cantilever model becomes too complex. Apr 09, 2020 transformer lecture notes edurev is made by best teachers of. A transformer is an electrical apparatus designed to convert alternating current from one voltage to another. Lecture 34 high frequency transformers in part a we will focus on transformers and the relation between magnetic and electrical properties. This section contains lecture notes in both pdf and powerpoint formats. A transformer consists of two electrically isolated coils and operates on faradays principal of mutual induction, in which an emf is induced in the transformers secondary coil by the magnetic flux generated by the. These notes has been made by me after watching nptel lectures given by dr. They are encountered daily, in industrial, commercial and domestic situations.
Download pdf of transformer and generators note offline reading, offline notes, free download in app, engineering class handwritten notes, exam notes. If you dont already have a viewer for pdf files, you can download the acrobat reader. May 21, 2014 apr 09, 2020 transformer lecture notes edurev is made by best teachers of. Ge 207electrical machines i part a singlephase transformer 2nd year comm. In other words, for a transformer there is no direct electrical connection between the two coil windings, thereby giving it the name also of an isolation transformer. Distribution substations may also be the points of voltage regulation, although on long distribution circuits several kmmiles, voltage regulation equipment may also be installed along the line. Ip rating for electrical enclosure 11kv415v over head line specification as per rec abstract of national skip to content engineering interview questions,mcqs,objective questions,class notes,seminor topics,lab viva pdf free download. In the case of the magnetic field we can see that our old amperes law can not be the whole story. Here the transformer is used to change the incoming mains voltage around 240 v in many countries, and 110v in many others to the required voltage to supply the equipment. Pdf basic electrical engineering 1st year ebook, notes. Transformer construction a transformer consists of two windings coupled through a magnetic medium. The input for a distribution substation is typically at least two transmission or subtransmission lines. The high voltage and low voltage windings are placed on top of each other and insulated by layers or tubes.
Voltampere rating transformer rating is specified as the product of voltage and current and called va rating. Thus, they measure the quantity in terms of their deflection, for which they are already calibrated. Lecture series on basic electrical technology by prof. A transformer is an electrical device used to change the value of an alternating voltage. This document is highly rated by students and has been viewed 241 times. Lower i means less power loss due to i2r losses in lines, cables, transformers, etc generator step up transformer i v step down transformer v i three phase transformers 3 singlephase units can form 3phase bank or. Transformers have been used at powerplants since the inception of alternatingcurrent generation, a century ago. Lecture notes basic electrical and electronics engineeringunit 1. Transformer core the composition of a transformer core depends on voltage, current, and frequency. Larger transformer use layered construction shown in the previous. Download basic electrical and electronics engineering notes pdf.
Not all lectures will have handouts, this table only provides handouts that are available electronically. Some of the slides include animations, which can be seen by viewing the powerpoint file as a slide show. Bee1101 1 st and 2 nd semester syallabus modulei 10 hours dc networks. All transformers rely on the principle of mutual inductance for their operation. The circuit diagram for such an application is given in fig. This document is highly rated by electrical engineering ee students and has been viewed 628 times. Some slides are taken from ali bazis presentations disclaimer these handouts only provide highlights and should not be used to replace the course textbook. Power systems notes for gate and competitive exams. Nevertheless, singlephase rectifiers are still in use both as lowpower standalone converters up to. The transformer is a static device that transfers electrical energy from one electrical circuit to another electrical circuit through the medium of magnetic field and without a change in the frequency. We then use the information gleaned from relating the copper wire turns loss of a transformer to more accurately treat the case of an inductor which carries only ac currents in. Distribution substation a distribution substation transfers power from the transmission system to the distribution system of an area. This basic electrical engineering notes pdf free download starts with the topics covering introduction to electrical engineering. This experience suggested there might be other people much like myselfoutside the power industry, but vitally concerned with it.
Ahmed threephase transformer a threephase system in used to generate and transmit electric power. The principle parts of a transformer and their functions are. A transformer changes the voltage level or current level on its input winding to another value on its output winding using a magnetic field. Commonly used core materials are air, soft iron, and steel. The matter presented here is prepared by the author for their respective teaching assignments by referring the text books and reference books. A transformer consists of two coils of wire called windings, which are wound onto a common iron core. We have provided basic electrical and electronics of b. In particular, if a coil rotates in the presence of a magnetic field, the induced emf varies sinusoidally with time and leads to an alternating current ac, and provides a source of ac. One of their main applications is within mains power supplies. A transformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction. Apr 02, 2008 lecture series on basic electrical technology by prof.
Perhaps the most familiar application today is for small electronic devices such as laptop computers. Lecture transformers 3 acknowledgmentthese handouts and lecture notes given in class are based on material from prof. The transformer is a electrostatic device which is used to transfer electrical energy voltage or current from one circuit to another by mutual induction of two electric circuits without change in frequency, which is working under the principle of electromagnetic induction. Transformer, mutual inductor, uses of transformers, construction of transformers, ideal transformer, complex mutual impedance of a transformer. Basic electrical and electronics engineering notes pdf. Inductors all circuits carry currents that necessarily produce magnetic fields and store magnetic energy. Lower i means less power loss due to i2r losses in lines, cables, transformers, etc generator step up transformer i v step down transformer v i three phase transformers 3 singlephase units can form 3phase bank or single threephase transformer 3 separate cores in a single tank. Lecture 17 transformers in this lecture the following are introduced. Generally, the primary winding of a transformer is connected to the input voltage supply and converts or transforms the electrical power into a magnetic field. In both core and shell type transformers, the laminations are cut in the form of l, e and i shape to avoid high reluctance at the joints. This pdf ebook notes on basic electrical engineering contains brief concise notes and will help you in your studies for your first year semester examination.
Here are the pdf lecture notes for the first year engineering subject basic electrical engineering. Generally, aircore transformers are used when the voltage source has a high frequency above 20 khz. Tech 1st year study materials and lecture notes for cse, ece, eee, it, mech, civil, ane, ae, pce and all other branches. Then to summarise this transformer basics tutorial. While operating principles of transformers remain the same, the challenges of. Basic electrical engineering pdf free download links. Transformers and generators vtu notes pdf tg pdf vtu. The transformer is a static device that transfers electrical energy from one electrical circuit to another electrical circuit through the medium of. Basic transformer notes transformer alternating current.
Complicated distribution substations can be found in the downtown areas of large cities. A transformer is a device that converts one ac voltage to another ac. Steel itself is a conductor, and changing lines of magnetic flux also induce a voltage and current in this conductor. Thus every wire and circuit element generally has some inductance that may influence circuit behavior, particularly at higher frequencies. Distribution substations michigan technological university. Apr 21, 2020 chapter 2 transformers part 1 notes, electrical machines, electrical engineering electrical engineering ee notes edurev is made by best teachers of electrical engineering ee. Kirchhoffs laws, node and mesh analysis, deltastar and stardelta transformations.
1268 1255 497 736 613 1289 1133 1226 762 586 1183 278 214 594 757 381 76 613 479 743 625 535 726 1045 479 775 472 1187 1148 28 954 115 1146 543 343 1284 168 734 148 46 797