SSC JE Electrical Engineering 2017 Set 3 Paper

Specific energy consumption for sub urban service is usually 50 – 70 watt-hours per tonne-km and for main live 20 - 30 watt - hours Per tonne-km.
Specific energy consumption is least for main live service and highest for urban service.
Specific energy consumption
Energy consumption of train = $\frac{\mathrm{in}\left(\mathrm{watt}-\mathrm{hour}\right)}{\mathrm{Weight}\mathrm{of}\mathrm{train}\mathrm{in}\mathrm{tonne}}\times$Distance of run in km