# Protection and Switchgear

 Course Code : EE6702 Author : ULektz University : Anna University, Tamil Nadu Regulation : 2013 Categories : Electrical & Electronics Format : ePUB3 (DRM Protected) Type : eBook

FREE

Description :Protection and Switchgear of EE6702 covers the latest syllabus prescribed by Anna University, Tamil Nadu 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.

##### Topics
###### UNIT I PROTECTION SCHEMES

1.1 Principles and need for protective schemes

1.2 Nature and causes of faults

1.3 Types of faults

1.4 Fault current calculation using symmetrical components

1.5 Methods of Neutral grounding

1.6 Zones of protection and essential qualities of protection

1.7 Protection schemes

###### UNIT II ELECTROMAGNETIC RELAYS

2.1 Operating principles of relays

2.2 The Universal relay - Torque equation

2.3 R-X diagram

2.4 Electromagnetic Relays

2.5 Overcurrent relays

2.6 Directional relays

2.7 Distance relays

2.8 Differential relays

2.9 Negative sequence relays

2.10 Under frequency relays

###### UNIT III APPARATUS PROTECTION

3.2 Protection of transformer.

3.3 Protection of generator.

3.4 Protection of motor.

3.5 Protection of busbars.

3.6 Protection of transmission line.

###### UNIT IV STATIC RELAYS AND NUMERICAL PROTECTION

4.1 Static relays

4.2 Phase, Amplitude Comparators

4.3 Synthesis of various relays using Static comparators

4.4 Block diagram of Numerical relays

4.5 Overcurrent protection

4.6 Transformer differential protection

4.7 Distant protection of transmission lines.

###### UNIT V CIRCUIT BREAKERS

5.1 Physics of arcing phenomenon and arc interruption

5.2 DC and AC circuit breaking

5.3 Re-striking voltage and recovery voltage

5.4 Rate of rise of recovery voltage

5.5 Resistance switching

5.6 Current chopping

5.7 Interruption of capacitive current

5.8 Types of circuit breakers- Air blast, Air break , Oil,SF6 , Vacuum circuit breakers

5.9 Comparison of different circuit breakers

5.10 Rating and Selection of Circuit breakers.