Your roadmap · आपका रोडमैप
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Admission & first meetingप्रवेश और पहली मुलाकातEnquire at your nearest NDSS centre, meet the teacher, fix the batch time and get your study material.
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Part 1 of the syllabusपाठ्यक्रम भाग 1Unit-wise coaching with notes and doubt classes.
Unit 1: Protective Relaying FundamentalsUnit 2: Distance, Differential and Static RelaysUnit 3: Protection of Apparatus and Lines
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Part 2 of the syllabusपाठ्यक्रम भाग 2Unit-wise coaching with notes and doubt classes.
Unit 4: Circuit Interruption TheoryUnit 5: Circuit Breakers and Fuses
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Unit tests & assignmentsयूनिट टेस्टRegular tests in the university / board pattern.
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Semester 7 exam (university / board)विश्वविद्यालय / बोर्ड परीक्षाPrevious papers and full revision before the exam.
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Online tests & resultऑनलाइन टेस्ट और रिज़ल्टTake the tests online; your marks and result show in your student login and at the centre.
Syllabus · पाठ्यक्रम
1 subject · 5 chapters · 28 topics
01Unit 1: Protective Relaying Fundamentals
6 topics+
- Need for protection and protective zones
- Requirements: selectivity, speed, sensitivity, reliability
- Electromagnetic attraction and induction relays
- Overcurrent and IDMT relays
- Directional relays
- Primary and backup protection
02Unit 2: Distance, Differential and Static Relays
5 topics+
- Impedance, reactance and mho relays
- Three-zone distance protection
- Differential and percentage differential relays
- Static relays: comparators
- Numerical relays
03Unit 3: Protection of Apparatus and Lines
5 topics+
- Alternator protection: stator, rotor and loss of excitation
- Transformer protection: differential, Buchholz, restricted earth fault
- Bus-bar protection
- Transmission line protection: pilot wire and carrier
- Induction motor protection
04Unit 4: Circuit Interruption Theory
5 topics+
- Arc formation and arc voltage
- High-resistance and current-zero interruption theories
- Restriking and recovery voltage, RRRV
- Current chopping and resistance switching
- Interruption of capacitive currents
05Unit 5: Circuit Breakers and Fuses
7 topics+
- Oil circuit breakers
- Air-blast circuit breakers
- SF6 circuit breakers
- Vacuum circuit breakers
- Ratings: breaking, making and short-time current
- HRC fuses, MCB and MCCB
- Testing of circuit breakers
About this course
You will be able to
- State the requirements of protective systems and explain relay operating principles
- Explain overcurrent, directional, distance and differential relays including static and numerical relays
- Select protection schemes for alternators, transformers, bus bars, lines and motors
- Explain arc formation and interruption, restriking voltage, RRRV and current chopping
- Compare oil, air-blast, SF6 and vacuum circuit breakers and HRC fuses
- Calculate relay settings and circuit-breaker ratings
Who it is for
- B.Tech Electrical Engineering students of Semester 7 under AKTU
- Students preparing for AKTU examinations, GATE and power-utility job interviews
What you need
- Power System-I and Power System-II
Online tests & result
Practice and unit tests online; marks and result show in your student login and at the centre.
Student login →
Questions
Which syllabus is followed?
The current AKTU (Dr. A.P.J. Abdul Kalam Technical University, Lucknow) B.Tech syllabus of Switchgear and Protection (Electrical Engineering, Semester 7). If your university or college follows a different syllabus, the centre teaches from your own university syllabus.
How is the subject examined?
AKTU assesses it through sessional tests, assignments and attendance, and an end-semester university examination; the centre covers every unit with theory, derivations and numericals.
Are previous-year questions practised?
Yes. Unit-wise AKTU previous-year questions, short-answer questions and the test series are solved in class.
