Wednesday, June 13, 2012
EE2402 PROTECTION AND SWITCHGEAR Syllabus EEE Seventh(7th) Semester - Anna University - Regulation 2008
EE2402 PROTECTION AND SWITCHGEAR L T P
C
3 0 0 3
AIM:
To introduce the students to the various abnormal
operating conditions in power system and
describe the apparatus and system protection schemes.
Also to describe the phenomena of current
interruption to study the various switchgears.
OBJECTIVES:
i. To discuss the causes of abnormal operating conditions
(faults, lightning and switching
surges) of the apparatus and system.
ii. To understand the characteristics and functions of
relays and protection schemes.
iii. To understand the problems associated with circuit
interruption by a circuit breaker.
UNIT I INTRODUCTION 9
Importance of protective schemes for electrical apparatus
and power system. Qualitative review of
faults and fault currents - relay terminology –
definitions - and essential qualities of protection.
Protection against over voltages due to lightning and
switching - arcing grounds - Peterson Coil -
ground wires - surge absorber and diverters
Power System earthing – neutral Earthing - basic ideas of
insulation coordination.
UNIT II OPERATING PRINCIPLES AND RELAY
CHARACTERISTICS 9
Electromagnetic relays – over current, directional and
non-directional, distance, negative sequence,
differential and under frequency relays – Introduction to
static relays.
UNIT III APPARATUS PROTECTION 9
Main considerations in apparatus protection -
transformer, generator and motor protection -
protection of busbars. Transmission line protection -
zones of protection. CTs and PTs and their
applications in protection schemes.
77
UNIT IV THEORY OF CIRCUIT INTERRUPTION
9
Physics of arc phenomena and arc interruption.
DC and AC circuit breaking - restriking voltage and
recovery voltage - rate of rise of recovery voltage
- resistance switching - current chopping - interruption
of capacitive current.
UNIT V CIRCUIT BREAKERS 9
Types of circuit breakers – air blast, air break, oil, SF6 and vacuum circuit breakers –
comparative
merits of different circuit breakers – testing of circuit
breakers. TOTAL : 45 PERIODS
TEXT BOOKS:
1. M.L. Soni, P.V. Gupta, V.S. Bhatnagar, A. Chakrabarti,
‘A Text Book on Power System
Engineering’, Dhanpat Rai & Co., 1998. (For All
Chapters 1, 2, 3, 4 and 5).
2. R.K.Rajput, A Tex book of Power System
Engineering. Laxmi Publications, First
Edition Reprint 2007.
REFERENCES:
1. Sunil S. Rao, ‘Switchgear and Protection’, Khanna
publishers, New Delhi, 1986.
2. C.L. Wadhwa, ‘Electrical Power Systems’, Newage
International (P) Ltd., 2000.
3. B. Ravindranath, and N. Chander, ‘Power System
Protection & Switchgear’, Wiley Eastern Ltd.,
1977.
4. Badri Ram, Vishwakarma, ‘Power System Protection and
Switchgear’, Tata McGraw Hill, 2001.
5. Y.G. Paithankar and S.R. Bhide, ‘Fundamentals of Power
System Protection’, Prentice Hall of
India Pvt.
Ltd., New Delhi–110001, 2003
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