-This paper examines the impact of the network modification produced by the replacement of an existing conventional generator with a high voltage directly connected generator on the adequacy of existing circuit breakers distributed throughout a high voltage transmission network. The significance of generator design changes is assessed by comparing the critical fault types producing maximal circ...

Online Circuit Breaker Monitoring System. (December 2007) Zarko Djekic, B.S., University of Novi Sad, Serbia Chair of Advisory Committee: Dr. Mladen Kezunovic Circuit breakers are used in a power system to break or make current flow through power system apparatus. Reliable operation of circuit breakers is very important to the well-being of the power system. Historically this is achieved by reg...

In order to ensure the reliable interruption of high voltage direct current circuit breaker (HVDC CB), breaking test HVDC CB plays an important role in its performance verification. this paper, process is analyzed, and equivalent requirements for are summarized. current, transient (TIV) duration short, which leads insufficient stress. A new synthetic testing CBs proposed, can solve problem TIV ...

-With the connections between the safe operation and national economy development getting closer, the original scheduled maintenance has been unable to adapt to the current demand for electricity. The condition-based maintenance, which is an immediate and effective maintenance mode for supply equipment, achieves supply companies general concern. This paper aims at the existing problems in on-po...

Present Federal regulations which specify maximum instantaneous circuit breaker settings for the short-circuit protection of coal mine trailing cables are discussed. Characteristics of mine power systems, which limit short-circuit current in dc trailing cables and minimum expected short-circuit currents for dc 300 and 600 V trailing cables, are analyzed. New maximum instantaneous circuit breake...

The state of the energy-absorption branch MOV in hybrid DC circuit breaker (DCCB) has a very important impact on short fault breaking operation breaker. Therefore, it is necessary to evaluate MOV, which also called “sleep component”. Due DCCB being placed indoors, aging mainly caused by short-circuit impulse current. this paper focuses study characteristics MOV. dynamic simulation system was bu...