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Broken Conductor (46BC)
A typical unbalanced fault that can occur on the system is an open circuit fault. This
fault can arise from broken conductor, discrepancy of one switchgear poles position
or blowing of a fuse.
MiCOM P122, P123 and P127 relays are able to measure the ratio of negative to
positive sequence current (I2/I1). This fully programmable function allows more
sensitivity and stability than pure negative sequence measurement