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    METRO RAILWAY, KOLKATAPRESENTATION

    BY

    ELECTRICAL DEPARTMENT

    ON THE VISIT

    OF

    SRI R.S.GROVER, ADDL. MEMBER ELECTRICALON

    14th JULY, 2005

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    CONSTRUCTION OF 5 RAPIDTRANSIT LINES OF TOTAL

    ROUTE LENGTH OF 97.5 KMWAS PREPARED IN

    1971.

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    DUM DUM TO TOLLYGUNGEROUTE LENGTH - 16.45 KMs

    BEING THE BUSIEST CORRIDOR

    SANCTIONED ON 1-6-1972.

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    First METRO Service commencedon 24-10-1984 between ESP-NBN

    covering 5 stations.

    Thereafter different sections wereopened progressively and Finally

    the stretch on 27.9.95.

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    SALIENT FEATURE

    OF

    METRO RAILWAY

    KOLKATA

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    GAUGE : 1676 mmLENGTH (DMI to TOL ) : 16.45 km

    GRADIENT : 2% on running line & 4% on

    approach to carshed.COACH : BG Bogie & MG Shell

    General Features

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    UNDERGROUND : 15

    ELEVATED : 1

    SURFACE : 1

    DISTANCE BETWEEN STATIONS

    AVERAGE : 1.020 km

    MAXIMUM : 2.151 km (DMI BEL)

    MINIMUM : 0.597 km (CEN-CWC)

    NO. OF STATIONS

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    TRAIN FREQENCY

    PEAK HOUR : EVERY 8 MINUTESNON PEAK HOUR : EVERY 10/15 MINUTES

    NO. OF TRAINS

    WEEKDAYS : 190

    SATURDAY & HOLIDAYS : 164

    SUNDAYS : 64

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    ROLLING STOCK/ TRACTION

    NO. OF COACHES : 144 (9 NGEFRAKE + 9 BHELRAKE)

    TRAIN COMPOSITION : 2 DMC

    2 NDMC-MA

    2 NDMC MC

    2 TC

    CLASS OF ACCOMODATION : ONECLASS

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    VENTILATION AND AIRCONDITIONING

    Main Parameters

    MAX PERMISSIBLE TEMP AT STATION : 30 oC

    MAX TEMP. IN TUNNEL : 32.8 0C

    MAX. RELATIVE HUMIDITY AT STATION : 87%

    MAX HUMIDITY IN TUNNEL : 77%

    MAX. AIR VELOCITY AT STATION : 2.5 m /sec

    AT TUNNEL : 3.0 m/sec

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    a) TOTAL ESCALATORS : 38

    b) MINIMUM RISE : 4 Mt.

    c) MAXIMUM RISE : 7 Mt.

    d) INCLINATION : 30O

    e) WIDTH : 1.1 Mt.

    f) PASSENGER CLEARING

    CAPACITY : 800 Persons/Hour

    g) SPEED : 0.45 Mt./Sec.

    h) MOTOR CAPACITY : 7.5 KW TO 12 KW

    ESCALATORS:

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    Power supply

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    33 KV 50 Hz 3 o supply is obtainedfrom CESC at 4 receiving sub-station.

    These sub-station are inter-countered

    with MR 33 KV feeder cable laidthrough the tunnel.

    33 KV is stepped down to 11 KV at

    receiving sub-station.

    Except Rabindra Sadan, all other MetroRailway Stations are having twoindependent feeders.

    33 KV SYSTEM

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    3rd Rail

    Running

    Rail

    33 KVIncoming From

    CESC

    33KV/11 KV

    16 MVA(Oil Type)

    11 KV System

    Traction

    Transformer

    Rectifier

    33 KV System

    415 Volt System

    To Loads like pump, fan, light,ACP

    lant etc.

    Auxiliary Transformer

    33 KV Orange

    11 KV Green

    750 Volt (DCPositive) Red

    415 Volt Brown

    750 Volt (DCNegative) Black

    Metro Railway Electric Power Distribution Systems

    Isolators

    HSCB

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    Third Rail System

    Technical assistance extended by OSAKAMunicipal Transport Bureau for 3rd rail current

    collection and rolling stock design.

    Air condition and ventilation of OSAKA Metrowas adopted as climatic condition are same i.e.high humidity and temperature.

    Flat bottom foot 52 kg/m rail of high conductivity

    (specific resistance being seven times that of copper)also known as rimming steel is used as conductor of

    power at 750 V dc.

    Overall resistance 0.029 ohms per km.

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    3rd rail laid as specially prepared bed on

    the outer side of running track with

    insulating high density polyethyleneinserts for fixing the conductor rail

    mounting assembly consisting of 3.3 KV

    porcelain insulator, galvanized mild steel

    frame work for mounting FRP shroudboard on top and rear. 3.3 KV insulators

    are spaced at 2.50 mt apart .

    Third Rail Laying System

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    Neutral section (air gap) is provided in the trailing

    direction of station platform at every traction station .

    Length ofN/section :15.50 mts; current collectors are

    spaced at 13.50 meters.

    Neutral Section

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    Need for ventilation

    To ensure supply of fresh Air forPassengers(O2)

    To dilute obnoxious & hazardous gases

    To bring down the relative humidity

    To dispose of large quantity of heat by Traction

    Eq.,Auxiliary appliances, Human Body

    To dispose of heat leaked inside the subway from the

    surrounding soil

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    Air Ventilation Design criteria

    Fixing Up Ambient Condition (90% of day of any season)

    from last 5 YearRecord from Metrological Department at 10

    Hrs. when peakTraffic Occurs.

    SeasonSeason TemperatureTemperature Relative HumidityRelative Humidity

    Summer 36 55

    Monsoon 33 70

    Winter 27.2 57

    Because of pollution and Dust, Air washery had been provided

    at every fresh air intake.Now at Esplanade station, dry air filters

    have been provided & air washery closed to save electricity

    consumption.

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    EXTENSION OF METRO FROM TOL TO GARIA

    SANCTIONED IN 1999-2000

    TOTAL ROUTE LENGTH : 8.70 Kms.

    VIADUCT : 8.60 Kms.

    LEVEL TRACK: 0.10 Kms.

    NO. OF STATIONS : 6

    KUDGHAT,BANSDRONI,NAKTALA,GARIA

    BAZAAR,PRANABNAGAR and NEW GARIA

    SANCTIONED COST : Rs. 907 Crores

    1/3 COST OF THE PROJECT WILL BE SHARED BY

    THE STATE GOVERNMENT

    T.D.C. : MAR. 2007

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    Number of Stations

    Elevated Stations 5 (five) Nos.

    Surface Station 1 (one) No.

    NAME OF STATIONS :

    KUDGHAT

    BANSDRONI

    NAKTALA

    GARIA BAZAR

    PRANABNAGAR

    NEW GARIA ( AT SURFACE )

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    CIRCULAR RAILWAY EXTENSION:

    Metro Rly. is also executing Circular Railway extension

    project for E.Rly.

    a) Extension from Prinsepghat to Majerhat:

    Project sanctioned in 1999-00

    Route length : 5.75 Kms.

    Viaduct : 4.00 Kms.

    Level track : 1.75 Kms.

    No. of station : 2 (Both elevated)

    Khidderpore & Remount road

    Estimated cost : 118 Crores

    T.D.C. : Work Over CRSs

    sanction awaited

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    CIRCULAR RAILWAY EXTENSION Contd.:

    b) Extension from Dumdum Cantt. to NSC Bose Airport:

    Project sanctioned in 2000-01

    Route length : 4.00 Kms.

    Viaduct : 3.25 Kms.

    Level track : 0.75 Kms.

    No. of station : 2 (Both elevated)

    Jessore Road & Airport station

    Estimated cost : 111 Crores

    T.D.C. : Aug. 2005

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    50 M3

    80 M3 80 M3

    50 M3

    30 M3

    UnderPlatform exhaust

    25 M3

    5 M3 5 M3

    30 M3

    Platform leakage

    To Tunnel

    Mid

    Tunnel

    exhaust

    MidTunnel

    exhaust

    Air FlowAir Flow

    Diagram in perDiagram in per

    SecondSecond

    Air intake (110M3)

    Air intake(110 M3)

    Air intake

    60 M3(Total) 60 M3(Total)

    Platform (60 M3)

    Tunnel (80 M3)

    UnderPlatform (25 M3)

    Platform leakage (5 M3)

    (50 M3)

    (30 M3)

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    Plate 14: Opposite Dum-Dum TSSSingle Bolt connection for two cables on 3

    rdrail. At least two bolts connections suggested

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