![]() UNIT V CIRCUIT BREAKERS Physics of arcing phenomenon and arc interruption DC and AC circuit breaking re-striking voltage and recovery voltage rate of rise of recovery voltage resistance switching current chopping interruption of capacitive current Types of circuit breakers air blast, air break, oil, SF6 and vacuum circuit breakers comparison of different circuit breakers Rating and selection of Circuit breakers. UNIT IV STATIC RELAYS AND NUMERICAL PROTECTION Static relays Phase, Amplitude Comparators Synthesis of various relays using Static comparators Block diagram of Numerical relays Overcurrent protection, transformer differential protection, distant protection of transmission lines. ![]() Switchgear And Protection By Jb Gupta Free Educational Site. ![]()
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