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Read MoreThere is in principle no difference between using the front and the rear pantographs for most locos as each is fully capable of delivering the required electric current from the catenary to the loco. (The AC-DC locos are special in that each loco is intended for a different traction supply.) Generally on IR there is no need for both pantographs to
Read MoreNormally, pantographs do not have to be lowered and raised on the run. The principal exception is the case of the AC-DC switchover by the WCAM series locos as described above. Other than that, there are a few points where the catenary has a gap (no cable physically present, not even a neutral or dead section), for instance at level crossings where
Read MoreUsually there is no problem, if the master circuit breaker of the loco has been switched off. In most cases of neutral sections, therefore, the driver does not have to lower the pantograph. If a live loco enters this section without its master circuit breaker turned off, then there is a possibility of sparking or transient disturbances, which can
Read MoreNot all IR locos have protection against incorrect line supplies, and the loco can be severely damaged in such cases. In some cases, this will blow a fusible link located near pantograph, and the driver will have to raise the appropriate ALT pantograph to continue. No further damage is possible because the only equipment that is live when
Read MoreThe WCAM-1 has a selector on the rightmost side of horizontal control panel for selecting the pantograph. It has four positions, DC, AC, DC-ALT and AC-ALT. In DC and AC-ALT mode, pantograph with two collector shoes is raised; in AC and DC-ALT, pantograph with one collector shoe is raised. The DC pantograph has two shoes and is thicker in its
Read MoreToday while the the Mumbai area is still mostly at 1.5kV DC, there are a couple of important AC-DC transition points such as Igatpuri -- now Kasara -- and Virar. In time, when 25kV AC becomes the norm and DC traction is decommissioned, these transitions will be history and there will be no more traction changeovers! Sad for railfans, but perhaps
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