Kolkata Metro rolling stock
The rolling stock of Kolkata Metro, India consists of five classes, three classes for Line 1 and two classes for Line 2.
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All trains receive 750 V DC using third rail electrification system. Trains can operate up to eight (line 1) and six (line 2) cars in length.
Since Kolkata Metro was constructed in 1970s, there were some technical limitations. Due to the tunnel dimensions, and being under Indian Railways, Kolkata Metro opted Indian metre gauge shell (22.7 m (74 ft 6 in)) with 1,676 mm (5 ft 6 in) tracks. So the options of rake manufacturers for Kolkata Metro Line 1 are very limited. While, the Kolkata Metro Line 2, being modern, uses the 1,435 mm (4 ft 8+1⁄2 in) standard gauge tracks.
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