(At times the sections are run with various voltages or frequencies.) The grids could be synchronised on a traditional foundation, but occasions may well interrupt synchronisation. This is simply not a difficulty for DC techniques. AC methods have a selected protection implication in which the railway electrification system would act as a "Backdoor

(From time to time the sections are driven with diverse voltages or frequencies.) The grids could possibly be synchronised on a standard foundation, but gatherings may possibly interrupt synchronisation. This is simply not a difficulty for DC programs. AC programs have a particular security implication in that the railway electrification technique