Book Details

Switchgear And Protection

Switchgear And Protection

Published by uLektz

Course Code : RT32021
Author : uLektz
University : JNTU Kakinada
Regulation : 2013
Categories : Electrical & Electronics
Format : ico_bookePUB3 (DRM Protected)
Type :



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Description :Switchgear And Protection of RT32021 covers the latest syllabus prescribed by JNTU Kakinada for regulation 2013. Author: uLektz, Published by uLektz Learning Solutions Private Limited.

Note : No printed book. Only ebook. Access eBook using uLektz apps for Android, iOS and Windows Desktop PC.

UNIT–I: Circuit Breakers

1.1 Miniature Circuit Breaker(MCB)– Elementary principles of arc interruption

1.2 Restrike Voltage and Recovery voltages – Restrike phenomenon – Average and Max. RRRV

1.3 Current chopping and Resistance switching–

1.4 Introduction to oil circuit breakers - Description and operation of Air Blast - Vacuum and SF6 circuit breakers

1.5 CB ratings and specifications – Auto reclosing

UNIT–II: Electromagnetic Protection

2.1 Principle of operation and construction of attracted armature – Balanced beam – induction disc and induction cup relays

2.2 Relays classification – Instantaneous – DMT and IDMT types – Applications of relays: Over current/under voltage relays – Directional relays – Differential relays and percentage differential relays – Universal torque equation–

2.3 Distance relays: Impedance – Reactance – Mho and offset mho relays – Characteristics of distance relays and comparison.

UNIT–III: Generator Protection & Transformer Protection

3.1 Protection of generators against stator faults – Rotor faults and abnormal conditions – restricted earth fault and inter turn fault protection – Numerical examples.

3.2 Protection of transformers: Percentage differential protection – Design of CT’s ratio – Buchholz relay protection – Numerical examples.

UNIT–IV: Feeder and Bus bar Protection

4.1 Protection of lines:Over current – Carrier current and three zone distance relay using impedance relays –Translay relay–

4.2 Protection of bus bars– Differential protection.

UNIT–V:Static and Digital Relays

5.1 Static relays: Static relay components - Static over current relay – Static distance relay – Micro processor based digital relays

UNIT–VI: Protection against over voltage and grounding

6.1 Generation of over voltages in power systems – Protection against lightning over voltages – Valve type and zinc–Oxide lighting arresters

6.2 Insulation coordination – BIL – impulse ratio – Standard impulse test wave – volt~time characteristics

6.3 Grounded and ungrounded neutral systems – Effects of ungrounded neutral on system performance

6.4 Methods of neutral grounding: Solid–resistance – Reactance – Arcing grounds and grounding Practices