13 8 SWITCHGEAR AND PROTECTION Course Code: 13EE1119 L 4 T 0 P 0 C 3 Pre requisites: Electrical Machines and Power Transmission Engineering Course Educational Objectives: ✤ To discuss the need for the protection and various protection schemes. ✤ To study different relays characteristics character istics ✤ To understand the method of circuit breaking, arcing phenomena – various arc theories theories - capacitive and inductive inductive breaking Course Outcomes: ✤ Students acquire knowledge in the field of power system protection, circuit breakers and relays. ✤ Students will gain ability to design the relevant protection systems for the main elements of a power system. UNIT-I ( 12 L ec tu re s) CIRCUIT BREAKERS: Principle of operation – RRRV – Current chopping- Circuit Breaker ratings and specifications, specifica tions, Testing Testing of Circuit Breakers. Constructi onal features and selection Constructional select ion of LT LT breakers (Miniature circuit circui t breakers/Metal clad circuit breakers/Earth leakage circuit breaker) and HT breakers (Air blast circuit breaker-Oil circuit breakers-SF6 CBVacuum Circuit Circuit Breakers) Breakers) UNIT-II ( 12 L ec t u re s ) PROTECTIVE RELA RELAYS-I: YS-I: Electromagnetic Relays: Principle of Operation and Construction of Attracted armature, Balanced Balanc ed Beam, induction Disc and Induction Cup relays. Relays Classification: Instantaneous, DMT and IDMT types, G V P College of Engineering (Autonomous) 2013 13 9 Application of relays: Over current, Under voltage, Directional, Differential and Percentage Differential.
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UNIT-III (12 Lectures) PROTECTIVE RELAYS-II: Universal Torque Equation, Distance relays: Impedance, Reactance and Mho and Off-Set Mho relays, Characteristics of Distance Relays and Comparison. Static Relays, Static Relays verses Electromagnetic Relays. Microprocessor Based Relays: impedance, directional, reactance, Mho & offset Mho and mathematical expression for distance relay.
The Book presents in-depth Knowledge about the principles and practices of Modern Power System Engineering. It gives an Integrated approach to the complex phenomena related with Switchgear, Protection, Fault-Calculations, Power System Analysis-Operation-Control-Automation, Digital Relays, Micro-processor based Relays and Microprocessor based Integrated Control and Protection Systems.
UNIT-IV (12 Lectures) PROTECTION OF GENERATORS, TRANSFORMERS, FEEDERS AND BUS BARS: Protection of Generators against Stator faults, Rotor faults, and Abnormal Conditions. Restricted Earth Fault, Numerical Problems on% Winding Unprotected. Percentage Differential Protection of transformers, Numerical Problems on Design of CT’s Ratio, BUCHHOLTZ Relay Protection Protection of transmission Lines: Over Current, Carrier Current and Three-zone Distance Relay Protection using Impedance Relays. Translay Relay. Protection of Bus bars – Differential protection. UNIT-V (12 Lectures) GROUNDING TECHNIQUES & OVER VOLTAGE PROTECTIONS: Grounded and Ungrounded Neutral Systems- Effects of Ungrounded Neutral on system performance- Methods of Neutral Grounding, Arcing Grounds and Grounding Practices.
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Here you can download the free lecture Notes of Switchgear and Protection Pdf Notes – SGP Pdf Notes materials with multiple file links to download. Switchgear and Protection Notes Pdf – SGP Notes Pdf book starts with the topics
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Switchgear and Protection Notes Details
UNIT – I Circuit Breakers-1
Circuit Breakers: Elementary principles of arc interruption, Recovery, Restriking Voltage and Recovery voltages.- Restriking Phenomenon, Average and Max. RRRV, Numerical Problems – Current Chopping and Resistance Switching – CB ratings and Specifications: Types and Numerical Problems. – Auto reclosures
UNIT – II Circuit Breakers-2
Description and Operation of following types of circuit breakers: Minimum Oil Circuit breakers, Air Blast Circuit Breakers, Vacuum and SF6 circuit breakers.
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UNIT – III Electromagnetic and Static Relays
The principle of Operation and Construction of Attracted armature, Balanced Beam, induction Disc and Induction Cup relays. Relays Classification: Instantaneous, DMT and IDMT types. Application of relays: Over current/ Under voltage relays, Direction relays, Differential Relays, and Percentage Differential Relays. Universal torque equation, Distance relays: Impedance, Reactance and Mho and Off-Set Mho relay, Characteristics of Distance Relays and Comparison. Static Relays: Static Relays verses Electromagnetic Relays
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UNIT – IV Generator Protection
Protection of generators against Stator faults, Rotor faults, and Abnormal Conditions. Restricted Earth fault and Inter-turn fault Protection. Numerical Problems on % Winding Unprotected.
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UNIT – V Transformer Protection
Protection of transformers: Percentage Differential Protection, Numerical Problem on Design of CT s Ratio, Buchholtz relay Protection.
Switchgear and Protection Notes Pdf – SGP Notes Pdf
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UNIT – VI Feeder and Bus-Bar Protection
Protection of Lines: Over Current, Carrier Current and Three-zone distance relay protection using Impedance relays. Translate Relay. Protection of Bus bars – Differential protection.
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UNIT – VII Neutral Grounding
Grounded and Ungrounded Neutral Systems.- Effects of Ungrounded Neutral on system performance. Methods of Neutral Grounding: Solid, Resistance, Reactance – Arcing Grounds and Grounding Practices.
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UNIT – VIII Protection against overvoltages
Generation of Over Voltages in Power Systems.-Protection against Lightning Over Voltages – Valve type and Zinc-Oxide Lighting Arresters – Insulation Coordination -BIL, Impulse Ratio, Standard Impulse Test Wave, Volt-Time Characteristics.
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TEXTBOOKS: Switchgear and Protection Notes – SGP Notes – SGP Pdf Notes
- Switchgear and Protection – by Sunil S Rao, Khanna Publishers
- Power System Protection and Switchgear by Badari Ram, D.N Viswakarma, TMH Publications
REFERENCE BOOKS: Switchgear and Protection Notes – SGP Notes – SGP Pdf Notes
- Fundamentals of Power System Protection by Paithankar and S.R.Bhide.,PHI, 2003
- Art & Science of Protective Relaying – by C R Mason, Wiley Eastern Ltd.
- Electrical Power Systems – by C.L.Wadhwa, New Age International (P) Limited, Publishers, 3rd edition
- A Textbook on Power System Engineering by B.L.Soni, Gupta, Bhatnagar, Chakrabarthy, Dhanpat Rai & Co.
Note:- These notes are according to the r09 Syllabus book ofJNTUH.In R13 ,8-units of R09 syllabus are combined into 5-units in the r13 syllabus. Click here to check all the JNTU Syllabus books
Switchgear Protection And Power Systems Sunil S Rao Pdf To Excel Software
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