If we don't take cost into account, is using sectionalizers is always better than using two CB? What if we consider the cost?
IDMT with instantaneous featured over current relay would work, with minimum use of CB. With, directional feature may give mal operation as supply could be from any direction on overload.......
Recloser and fuses work better for radial networks. However, for meshed networks directional overcurrent relays are required with proper coordination among the relays.
These publications may be useful in this regard.
Article An interior point method based protection coordination schem...
Article A comparative study of metaheuristic optimization approaches...
In terms of coast and simblciity reclosers in conjunction with sectionilzers and fuses are commonly used for radial distribution system protection. However, overcurrent realys in conjunction with C.Bs are also used for radial distribution system protection. Inverse directional overcurrent relays are used for meshed networks.
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