CSVTU BE VI Sem EE Power System Protection & Switchgear Syllabus
Chhattisgarh Swami Vivekanand Technical University, Bhilai
Semester: 6th Branch: Electrical Engg.
Subject: Power System Protection & Switchgear
Total Theory Periods: 40 Total Tut Periods: 12
Total Marks in End Semester Exam: 80
Minimum number of Class tests to be conducted: 2
REALY : Terminology, Basic circuit, realy connection with trip circuit and circuit breaker, objectives of
protection, types of relay, construction and operation of instantaneous over current realy. I.DM.T. Relay,
directional Unit, differential relay, percentage differential relay, Buchholz relay, Generalized torque
expression, logical construction of impedance reactance, MHO and Off-set MHO Relays using
generalized torque expression.
Protection of Alternators
: Differential protection, Protection of stator against phases to ground fault,
phase to phase faults, inter turn fault, protection against unbalanced loading, protection of rotor against
ground fault, field failure, reverse power, back up protection, field suppression, protection of bus bars,
frame leakage protection, differential protection.
Protection of transformers & Feeders
: differential protection of transformers for different winding
configurations, difficulties encountered in differential protection and their remedies, protection of feeders,
protection of ring main and parallel feeders, protection of radial feeders by over current relays, distance
relays and carrier current protection scheme.
: directional relay, impedance relay, admittance relay and admittance relay, amplitude
comparator, phase comparator, duality between amplitude and phase comparators.
Circuit Breakers and Fuses
: Arc formation, arc interruption and restriking voltage, current chopping,
resistance switch, Air blast circuit breakers, minimum and bulk oil circuit breakers, SF6 and Vacuum
Circuit breakers, circuit breakers rating, testing of CB, definitions of terms in fuses, HRC fuses.
1. “Power system protection and switchgear”, Ravindranath and Chander, TMH
2. “Power system protection”, Badri Ram, TMH.
3. “Fundamentals of power system protection”, Paithankar and Bhinde, PHI
1. “Electrical power system”, Wadhw