Transmission and Distribution Notes

PROTECTION SCHEMES

Fundamentals of Power System Protection
Zones and types of Protection system
Protection against over voltages due to lightning and switching
Arcing Grounds
Surge absorber
Surge diverter
Types and Method of Neutral Earthing in Power Distribution

ELECTROMAGNETIC RELAY

Types of Electromagnetic Relay
Over Current Relay: Working Principle and Types
Distance relay
Impedance Relay
Differential Relay
Static relays

APPARATUS PROTECTION

Over current and earth fault protection
Transformer Protection
Generator protection
Protection of bus bars
Current Transformers(CT)s Potential Transformer(PT)s and their applications in protection

STATIC RELAYS AND NUMERICAL PROTECTION

Formation of arc during circuit breaking
AC and DC circuit breaking
Restriking voltage and recovery voltage
Resistance switching
Current Chopping

CIRCUIT BREAKERS

Rating of Circuit Breaker
Air blast circuit breaker: Working principle, Advantages, Disadvantages
Oil circuit breakers: Types, Construction, Operation, Advantages, Disadvantages
SF6 circuit breaker: Construction, Operation, Advantages, Disadvantages
Vacuum circuit breakers: Construction, Operation, Advantages, Disadvantages
Testing of circuit breakers