Switchgear is used both to deenergize equipment to allow work to be done and to clear faults downstream. Protection and switchgear lecture notes authorstream. Switchgear protections mcqs answers pdf electrical engg. Switchgear and protection topics covered introduction types of fault short circuit fault open circuit fault arrangement of protecting equipment lightning arrester capacitance voltage. Fundamentals of power system protection is a textbook which details the fundamental concepts and design aspects involved in devising power system protection schemes. Switchgear and protective devices 2015 8 p a g e risk of synchronous motors in large industrial premises falling out of step and tripping out. Switchgear and protection summary in an electric power system, switchgear is the combination of electrical disconnect switches, fuses or circuit breakers used to.
Electrical switchgear is consider as low voltage switchgear if it is rated upto a 400 v. The idea of the protection is that when we have an overcurrent or overvoltage, a relay will notice it and react. To give adequate protection to the motor under all conditions. Bakshi explained every information neatly without any mistake. Download it once and read it on your kindle device, pc, phones or tablets. By coordinating relays, faults can always be isolated. Top 100 switchgear and protection interview questions. Switchgear and protection textbook free download by bakshi. Impedance is inserted in the earthing lead to limit the magnitude of the earth fault current. Jul 07, 2018 switchgear and protection topics covered introduction types of fault short circuit fault open circuit fault arrangement of protecting equipment lightning arrester capacitance voltage. Use features like bookmarks, note taking and highlighting while reading switchgear and power system protection. The subject deals with the principles of circuit breaking and circuit breaker fundamentals.
Switchgear and protection electrical engineering mcq questions and answers home category electrical engineering mcq questions and answers switchgear and protection 1 which of the following circuit breakers is used for the railway electrification. How to download switchgear protection and power systems by. Here you can find protection and switchgear by bakshi free download shared files. Nptel syllabus coastal engineering video course course outline waves in shallow waters refraction, diffraction and shoaling coastal. Switchgear and protection the sequence of function during abnormal condition. Its targeted primarily towards final year electrical engineering students, but practising engineers who wish to revisit the fundamentals will find this book useful. Distance protection is costly so far distribution network, electric utilities and on sub transmission lines over current protection. Mcq on switchgear and protection 4 how engineering works. Thermal relays are used for protection of motor against overcurrent owing to a.
Protection and switchgear by bakshi faadooengineers. It applies to enclosure of electrical equipments with a rated voltage of less then or equal to 72. To provide a means of starting and stopping the motor and, at the same time, of limiting the starting current if required. Assembly of such devices in a logical manner forms switchgear. Nocfluid inclusion in mineral principles, methodology, practice. Transformer dc machines induction machine power system power electronics analog electronics prof. Switchgear and protection electrical engineering mcq. Apr 16, 2016 what are the main functions of control gear. The relay opens the breaker to avoid damage to the equipment. Advanced topics in the science and technology of concrete. Rajput this video contains important mcq related to switchgear and protection engineering which useful for.
We started easyengineering as a passion, and now its empowering many readers by helping them to make educational contents from their blog. Ee2402 protection and switchgear sasurie college of engineering. Mcqs on switchgear and protection how engineering works. In other words systems used for switching, controlling and. A switchgear is a generic term which includes all the switching devices associated with power system protection. Sep 02, 2014 engineering interview questions and answers, engineering multiple choice pdf for freshers and experienced. Sep 17, 20 over current protection though simple and economical, require readjustment if change in circuit condition occurs. Sgp 2170908 switch gear and protection list of text.
Design control and protection for medium voltage switchgear. Switchgear and protection summary in an electric power system, switchgear is the combination of electrical disconnect switches, fuses or circuit breakers used to control, protect and isolate electrical equipment. Pdf ee6702 protection and switchgear ps books, lecture. Provides information about academic calendar, notices, gtu results, syllabus,gtu exams,gtu exam question papers,gtu colleges. The protection index is the level of protection provided to by an enclosure against access to hazardous parts, the penetration of solid foreign bodies and of water. To provide means of braking the motor when required. In an electric power system, switchgear is the combination of electrical disconnect switches, fuses or circuit breakers used to control, protect and isolate electrical equipment. Switchgear and power system protection, ravindra p.
Also, if a relay fails to operate, there should be sufficiently quick backup protection so that the rest of the system is protected. Nptel video lectures, iit video lectures online, nptel youtube lectures, free video lectures, nptel online courses, youtube iit videos nptel courses. Rajput this video contains important mcq related to switchgear and protection engineering which useful for competitive exams. Apr 22, 2016 the operation of a relay should be fast and selective, ie, it should isolate the fault in the shortest possible time causing minimum disturbance to the system. Nptel notes pdf civil engineering 105 courses in pdf. Switchgear engineering services ltd provide comprehensive, cost effective solutions for the switchgear industry. Nptel lectures power system protection and switchgear. The neutral point of the generator is usually earthed, so as to facilitate the protection of the stator winding and associated system. Electrical engineering questions and answers switchgear. Only two phase and one earth fault relay is required for complete protection of three phase line. Switchgear protections mcqs answers electrical engineering multiple choice questions answers pdf download. Practicing all switchgear protections electrical engineering questions and answers in online helps you to improve your ability to attend the real time gate, ies and bsnl jto exams. Lecture notes on switchgear and protection devices for.
I have written only those lectures which i found important and which are in the gate syllabus. Lecture notes on switchgear and protection devices for students. To reverse the direction of rotation when required. Sunil s rao, switchgear protection and power systems, khanna publishers, new delhi, 11 th edition reprint 3 rd edition, 2008 references. The ip code is a coding system to indicate protection index. Switchgear and protection introduction power system. Summary switchgear and protection when the fault occurs the relay 2 connected to ct 8 and pt 7 actuates and close its contact 6 current flows from the battery 5 in the trip circuit 4 trip coil 3 is energized and cb 1 operating mechanism is actuated. These notes has been made by me after watching nptel lectures given by various professor from different iits and iisc. Switchgear and protection textbook free download switchgear and protection textbook by bakshi free download in pdf. Download protection and switchgear by u a bakshi and m v bakshi pdf.
The subject curriculum focuses on the study of fundamentals of power system protection, electromagnetic relays which are important one. It also includes all devices associated with control, metering and regulating of electrical power systems. Nptel notes pdf civil engineering 105 courses in pdf format useful for gate acoustics and daylighting in building nptel civil engineering notes pdf advanced foundation engineering nptel civil engineering notes pdf advanced geotechnical engineering nptel civil engineering notes pdf advanced hydraulics nptel civil engineering notes pdf advanced hydrology nptel civil engineering. Contents of power system protection lecture, iit bombay. Theoretical support and mathematical background is given in the text to support key concepts. It also covers the protection of feeders, transmission lines, transformers, generators and induction motors. Nocfire protection, services and maintenance management of building. The main function of a fuse is to a protect the line b open the circuit. Electric power system electricity is generated at a power plant 1 voltage is steppedup for transmission2 energy travels along a transmission line to the area where the power is needed 3 voltage is decreased or steppeddown at another substation 4 a distribution power line 5 carries that electricity until it reaches a home or business 6.
Switchgear and power system protection kindle edition by ravindra p. Ee2402 protection and switchgear l t p c 3 0 0 3 unit i introduction 9 importance of protective schemes for electrical apparatus and power system. Nov 04, 2017 switchgear and protection mcq for revision only. A leader in the switchgear and transformer industry, we have extensive experience of both current, legacy and obsolete distribution switchgear, transformers and ancillary equipment ranging from 415v to 33kv. Protection, introduction, the degree of compensation, voltage profile of series compensated line, faults with unbypassed series capacitors, relay problems due to compensation, voltage and current inversion, problems in reach measurement, protection of series compensated line, concept of adaptive relaying, fault. Switch gear and protection textbook are one of the famous textbook for engineering students. Course name sme name institute course duration timeline url. The general layout of a protection system may be viewed as given in the following figure. The book offers a blend of application practices and theoretical concepts to comprehend the subject of power system protection.
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