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Blog Entry# 572632
Posted: Nov 05 2012 (12:01)
2 Responses
Last Response: Nov 05 2012 (23:39)
2 Responses
Last Response: Nov 05 2012 (23:39)
Q. Why do locos sometimes use the rear pantograph and sometimes the front pantograph?
There 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 be raised at once since there are usually no unusual situations such as frost on the catenary or increased current collection requirements seen with other countries' railways.
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There 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 be raised at once since there are usually no unusual situations such as frost on the catenary or increased current collection requirements seen with other countries' railways.
Yet,...
more...
As per my knowledge the rear pantograph must be used in general as there are less no of forces acting on it while used in rear position, and since in India these locos can move in either direction hence two pantographs are provided