VVH/Vidyavihar (2)

This will help u better:
The first letter (gauge)
• W-Indian broad gauge (The "W" Stands for Wide Gauge - 5 Feet 6 inches)
• Y-metre gauge (The "Y" stands for Yard Gauge - 3 Feet or 1000mm)
• Z-narrow gauge(2 ft 6 in)
• N-narrow gauge (2 ft)
The second letter (motive power)
• D-Diesel
• C-DC electric (can run under DC traction only)
• A-AC electric (can run under AC traction only)
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• CA-Both DC and AC (can run under both AC and DC tractions), 'CA' is considered a single letter
• B-Battery electric locomotive (rare)
The third letter (job type)
• G-goods
• P-passenger
• M-mixed; both goods and passenger
• S-Used for shunting (Also known as switching engines or switchers in United states and some other countries)
• U-Electric multiple units (used as commuters in city suburbs)
• R-Railcars

/news/post/69731
For an outsider, the signalling cabin on platform No 1 of Kurla station (towards Kalyan), which caught fire on Tuesday midnight, is an unending maze of wires, switches and blinking lights. But for the Central Railway, it controls one of the busiest stretches of railway traffic in the country.The wire-and-switches grid manages hundreds of points - which determine the path a train should follow at track intersections - and scores of signals that guide about 900 locals on the main and harbour lines every day. This apart, 63 long-distance trains from CST and Kurla Terminus, and several goods wagons and many maintenance trains pass through Kurla.Within seconds of the fire at the important Kurla signalling cabin, there was another fire at the Vidyavihar signal room. The incidents paralysed all signals on a 3.4-km stretch between Sion and Vidyavihar...
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on the mainline, and Chunnabhatti-Kurla section on the harbour line.“It is like a massive heart attack,” a senior CR official described the Kurla fire. According CR officials, the fire gutted three signal panels and several switches.Kurla has 24 signals on the mainline for suburban and long-distance trains, more on the harbour section, then some more for the trains moving into the Kurla yard and EMU workshop.The situation forced CR into adopting manual mode of signalling. This meant that the entire 3.4-km stretch had become one signalling section. In normal circumstances, the distance between two signals is around 400-600 metres. So, while normally a train clears 600 metres allowing the next train to follow, in this case, trains had to wait for a preceding train to clear 3.4 kms before moving thus leading to massive delays.