This document provides a summary of the industrial training completed by Lovit Sawhney in July 2015. It includes an overview of key railway electrical terms and a description of cantilever assembly in Delhi Metro stations. It also summarizes tenders reviewed, office structure, and ongoing projects under RVNL including electrification and metro lines. Key sections reviewed are summarized along with field trips to the traction power control office, a traction substation, and power system installations in Delhi.

1. SUMMER
INDUSTRIAL
TRAINING REPORT
JULY-2015
Submitted By- Lovit Sawhney

3. Overview
 SBOQ- Standard Bill of
Quantities
 TRD- Traction Distribution
 TPC- Traction Power
Control
 TSS- Traction Substation
 OHE- Over Head
Equipments
 Mast(Poles)- used for
Cantilever Assembly

4. Cantilever Assembly
Cantilever
Assembly
in a Metro
Station
(DMRC)

5. Tenders
SBD- Standard Bidding Document
 Technical Bid
 Financial Bid
PMC Contract- Project Management
Consultancy --> Monitors the
Project
Reviewed SBOQ for Railway
Electrification and General Electrical
works.

6. Reviewed the Detailed Project
Report for New Metro Corridors in
Kolkata

7. Reviewed Sanctioned Estimate for Power Supply &
Distribution and Traction Third Rail for Kavi
Subhash(New Garia) to VIP Road Section on Kavi
Subhash(New Garia)- Biman Bandar(Airport)
Corridor for Kolkata Metro Project

8. Office Working
ED(Executive
Director)/Electrical
GGM(Group
General
Manager)/E
DGM(Deputy
General
Manager)/E
Sr. Mgr./E
Site Engr.(e.g.
Kolkata Metro)
GGM/E/P(Projects)

9. Some Projects Under
RVNL
 Electrification- Rani-
Palampur(RE/High Rise)
 Metro- Kolkata Metro
 Joka- BBD bagh(16.72 km)
 New Garia- Airport(32 km)
 Bara nagar- Barrackpur(12.5
km)[Focus on the above both
right now.]
Others(GEW)
 Rishikesh- Karnaprayag= New
Line
 Lucknow- Pilibhit= Gauge
conversion
 Ahmedabad- Botad= Gauge
Conversion
 Palampur- Samakhiali= Doubling

10. Interruptor No
Relay provided
with this
Isolator Manual
motor by TPC
Circuit
Breaker(C
.B.)
ABCB(in
GSS)
BOCB(Bul
k Oil)
MOCB(Me
tal Oil)
SF6(Gas)
VCB(Vacu
um)
SCADA
 Supervision
Control and Data
Acquisition-
Centralised Control
System(For
ON/OFF)
 SCADA System
reads the
measured flow and
level, and sends
the setpoints to the
PCCs.
E&M Design
(ASS-
Auxillary
Substation)
 Transformer
Sizing
 DG Sizing,
UPS System
 Fault
Calculation
 Lighting
 Cable Sizing
 HVAC
 Fire Action
 Fire Alarm &
Detection
 Fire Fighting

11. Transport Networks
 Rail Network:
 12 rail alignments
 105 suburban passenger railway stations(with an
avg. interval of 2-2.5 km)
 Important Terminals: Sealdah and Howrah
 Administered by Eastern Railway and SE Railway
 Circular Rail
 Total Length: 34 km
 16 km over the existing suburban route of Majerhat-
Ballygunge- Dum Dum via Kankgachi Chord of
Sealdah division
 18 km over Old Calcutta Port Trust Railways and
Eastern Railway’s Chitpur Yard
 Suburban Railway
 10 rail alignments of 1230 km length
 Metro System
 Extension from Dum Dum to Naopara- Metro
Railway
 East West Corridor(from Howrah Maidan upto Salt
Lake Sector V)- KMRCL
 Naopara to Dashineshwar- RVNL
 Naopara to Barasat- Metro Railway
Study of Final Detailed Project Report for
New Metro Corridors in
Kolkata(December- 2012)- Joka to
Majerhat(Phase- I)
1

12. System Selection
 Gauge Selection
 Broad Gauge has been adopted for proposed
Kolkata Metro corridors
 Transport System Capacity
 Design Capacity of about 42,000 passengers per
hour per direction
 Train Length upto 8 coaches
 Traction System Selection
 750V dc third rail in Kolkata Metro
 1500V dc catenary in Mumbai suburban of
Central and Western Railways
 25kV ac catenary in Delhi Metro and Indian
Railways
 Signaling and Tele-communication
 DMRC, BMRCL, HYD. METRO, JMRC
 CATC- Continuous Automatic Control System:
 ATS- Automatic Train Supervision
 ATP- Automatic Train Protection
 Computer based interlocking
 AFTC- Audio Frequency Track Circuits
Train Operations
 COMPOSITION
 MC: Motor Coach
 DTC: Driving Trailer Coach
 TC: Non- Driving Trailer Coach
 DTC-MC-TC-MC-MC-TC-MC-DTC
 CAPACITY: 2600(430- Sitting & 2180-
Standing) 2

13. POWER SUPPLY SYSTEM
 Overview of existing PSS
 Kolkata Metro receives power from
CESC at 33kV
 PS is controlled through SCADA system
 Need for high reliability of power
supply
 Requirement of electric power supply
 For running trains
 For station services(lighting, ventilation,
lifts, escalators
 For depots and maintenance of
infrastructure
 Designed Load estimation
 8 car rake- headway of 150 seconds
 Specific Energy Consumption-
80kW/1000 GTKM
 Elevated/at grade station load(initially)-
250kW
 Underground Station load-
1500kW(initially)
 Depot auxiliary load- 1500kW(initially)
3

14.  Selection of Traction System
 750V dc third rail system
 1500V dc overhead catenary system
 25kV ac overhead catenary system
 Traction Power demand
estimation Year
2015 2025 2035
Train
Composition
8 car 8 car 8 car
Headway 8.6 min 7.5 min 6 min
No. of train/hr. 7 nos. 8 nos. 10 nos.
Section(Corridor) Year
2015 2025 2035
Joka-
Majerhat
section
(Joka-BBD
Bagh
Traction 4.12 4.71 5.89
Auxiliar
y
3.06 3.53 4.00
Total 7.18 8.24 9.89
Net demand considering
5% distribution losses
7.54 8.65 10.39
Train Operation Plan
Power Demand Estimation (MVA)
4

15. Section
(Corridor)
Grid sub-
station (input
source)
Location of
RSS
Approx.
Length
of 33kV
cables
Joka-
Majerhat
(Joka-BBD
Bagh)
Joka sub-
station
(WBSEDCL)
Joka Station 1 km,
(Double
circuit)
Majerhat sub-
station
(CESC)
Majerhat
Station
1 km,
(Double
Circuit)
 Power Supply Source
 Power Supply Distribution
Arrangement
33 kV drawn from two RSSs via
Joka and Majerhat distributed
through 33 kV ring main cable
network for feeding to traction as well
as auxiliary loads.
 Elimination of intermediate voltage grade of
11kV
 Advantages
 Improved Reliability
 Reduced Space Requirement
 Reduced Operational Cost
 Improved Voltage Regulation 5

16. MAJOR POWER SUPPLY EQUIPMENTS/SYSTEMS
 Traction Substations(33kV/780V dc)
 Traction Substation converter for energy recovery
 Third Rail
 Made of composite Aluminum Steel
 Switch Gear
 GIS(Gas Insulated Switch gear)
 Rectifier HSCB (High Speed Circuit Breaker)
Feeder HSCB
 Cables
 33kV cable network
 DC cable between rectifier to rectifier HSCB
 DC cable from TSS to third rail
Auxiliary Power Supply and Emergency Backup
 Auxiliary supply arrangements for stations and
depot(ASS)
 Two dry type cast resin transformers(33/0.415kV) of
500kVA & 2500kVA
 Standby Power Supply
 Standby DG set of 200kVA

SCADA SYSTEM
 Receiving, traction and auxiliary supply of power
supply shall be monitored and controlled from a
centralized operation Control centre (OCC) through
SCADA system.
6

17. E & M SYSTEM
 Design Criteria
 System Voltage: 4/5V 3 phase 4
wires/240V 1 phase 2 wires, 50 Hz
 Ambient Temp.: 40˚C
 Demand Factor: 80%
 Load Power Factor: 0.95
 Voltage Drop(Final Circuit): 5%
 Colour Code
For Cable and Busbar-
Phase A: Red
Phase B: Yellow
Phase C: Blue
Neutral: Black
Ground: Green or Yellow Strip Green
Emergency Lighting Cable: Orange
 Standards, Codes and Regulations
ASME American Society of Mech. Engrs.(USA)
ASTM American Society of Testing Materials
IS/BIS Bureau of Indian Standards
BS British Standard
EA The Electricity Act, 2008
EN European Norms
IEC International Electro-Technical Commission
IS Indian Standards
ISO International Organization for
Standardization
NBC National building Code of India, 2008
NEC National Electrical Code
NEMA National Electrical Manufacturers
7

18.  Low Voltage Power Distribution System
 Transformers and Cables
 Two dry type cast resin transformers(33/0.415kV) of 500kVA & 2500kVA
 IEC60502
IEC60331 and BS6387- Fire resistant cables(for safety purposes)
 Low Voltage Switchboards
 Over Current Protection
 Earth Fault Protection
 Under Voltage and Over Voltage Protection
 Voltmeter and Selector Switch
 Ammeter and Selector Switch
 Indicating Lamps
 Digital meter for kW, kVA, kVAR and Power Factor meter
 Power Factor Control
 ACB Shunt trip
 Auxiliary contacts for remote monitoring via E&M SCADA System
 Lighting System
240V, Single Phase 50Hz Power Supply
 Emergency Power Supply
 Lift Operation
 Essential Lighting
 Signaling and Telecommunication
 Fire Fighting System
 Fare Collection System
 E&M SCADA System
 Microprocessor based distributed controllers interface directly with sensors,
actuators and environment delivery systems, i.e. HVAC units, electrical
system, Fire Alarm system, Fire Fighting System, and Plumbing & Drainage
System.
 Remote Processing Units (RPU) required for interface with different stations.
 A serial link communication network to allow data exchange between devices
in the system, i.e. Fire Alarm System, Fire Fighting System, Lifts and
Escalators, HVAC, Plumbing and Drainage. System, Lighting System, Low
Voltage Power Supply System, etc.
 Marshalling Cabinets for terminating E&M SCADA interface monitor and
control signal wiring.
 Associated Power & Control Cables.
8

19. VIADUCT PIERS-
Earth Conductors

20. Cable Layout-
Joka Metro Station
(Concourse Level)

21. Traction Power Control- NDLS
Control Office- NDLS
Traction Substation-
Chanakyapuri
Power System Installation-
NDLS
FIELD TRIPS

22. Control office where operation of
lines(power supply facilities) are
held with the help of SCADA
Traction Power
Control- NDLS

23. The arrival time and
the departure time of
a specific train at a
specific station is give
as a input with the
help of the received
feedback.
Trains moving on
Line no. 2 and Line
no. 3 can gain their
maximum speeds,
whereas loop 1 and
loop 4 are used near
the stations and the
trains are required
to slow down on
these lines.
Control Office-
NDLS
Mapping of the timings of
the specific trains is done
simultaneously and
automatically, resulting in
a graph/map which is
used to track a train.
Delhi-Ambala
Division

24. Traction Sub-
Station-
Chanakyapuri
66 kV/25kV
Traction Sub-
Station

25. Traction Sub-
Station-
Chanakyapuri…cntd
1. Supply
Arrangement at
Railway TSS.
2. Systematical
Diagram of
66kV/25kV TSS.
3. Earthing
Arrangement at
TSS.
4. Various
Equipments in a
TSS.

26. Power Supply
Installation- NDLS
Auxiliary Transformers
which are paired up as (AT-
1, AT-2); (AT-3, AT-4); (AT-
5, AT-6).
POWER
SUPPLY
INSTALLATIO
N BOARD

27. Power Supply Installation-
NDLS… cntd.
Power
Supplies-
1.Local
Supply (3
phase, 230
V/50Hz
2.AT
Supply(50
Hz)
3.Generator
Supply (3
phase, 215
V/50 Hz