System Works Knowledge Sharing

KNOWLEDGE SHARING
SYSTEM WORK
PRESENTED BY
MOHD ZAMIR ABDUL RAHMAN
QUANTITY SURVEYOR
MMC CORPORATION BERHAD GAMUDA BERHAD

TRACTION &
POWER
SUPPLY (TPS)
 INTRODUCTION
 PURPOSE OF
TRACTION & POWER
SUPPLY
 EQUIPMENTS &
FUNCTIONS
 JMI PROCEDURE
 ISSUES/PROBLEM
RELATED DURING
JMI

INTRODUCTION
 Electric power from a generating station is transmitted to grid
substations using a three-phase distribution system.
 At the grid substation, a step-down transformer is connected across
two of the three phases of the high-voltage supply.
 The transformer lowers the voltage to 25 kV which is supplied to a
railway feeder station located beside the tracks

 Power Supply is used for signalling operation, communication
equipment, station and buildings, etc
 Receive electrical power from TNB, transform it to the required voltage
and distribute it to electric trains continuously along the railway.
Requirement for Traction Power:
 Reliability
 Availability
 Maintainability
 Safety

 132Kv/25Kv Power Transformer
This transformer is installed in a
traction sub-stations along side the
rail track and is used to feed 25KV.
AC power to railway electric
locomotives. It will receive from
TNB Power Supply 132 and reduce
the voltage to 25 Kv using the
transformer.

 Circuit Breaker 132/25 Kv
A circuit breaker in a substation is a
form of protection, designed to
break fault current (the large volume
of current that flows when a fault is
detected.
A protection device used to protect
equipment from damage and people
from dying, that may be in contact.

 Circuit Switchgear 25 Kv
A switchgear has the main function of
protecting a circuit. This also
provides the isolation of circuits
from power supplies thus protecting
the people working.
To maintain it and enhancement of the
system availability by allowing more
than one electric current source to
flow through a load.

 Isolator / Disconnector
To ensure that an electrical circuit is
completely de-energised for service
or maintenance.
High-voltage isolation switches are
used in electrical substations to
allow isolation of apparatus such as
circuit breakers, transformers, and
transmission lines, for maintenance.

 Voltage & Current Transformer
Used for measurement of alternating
electric currents. When current in a
circuit is too high to apply directly to
measuring instruments.
A current transformer produces a
reduced current accurately
proportional to the current in the
circuit.

 Control & Protection Panel
To control and protect all equipment in
the modular buildings
Consist of relays, cabling, metering
panels, battery and other
equipments inside the panels.

 Prefabricated Modular Building
Consist of equipment, protection
panel, battery room, RTU cabinet,
comm’s rack, circuit breaker,
disconnector.
Located at each Feeder Station (FS)
along the railway track and also Mid
Point Track Section Location
(MPTSL), DFL & TCBL.

 Remote Terminal Unit (RTU)
Brain to the equipments inside
Modular Building and at the
trackside. For communication at the
trackside.
Install at each Feeder Station (FS)
along the railway track and also Mid
Point Track Section Location
(MPTSL), DFL & TCBL.

JMI PROCEDURE
Request For Inspection
(RFI) being issued by
BBASJV
KSET will review JMI
document & drawings
Going to site & do
inspection with KSET,
BBAS & MGJV
Comment by KSET and
put under SNAGLIST
KSET will sign JMI
document after
inspection. BBAS needs to
rectify SNAGLIST before
T&C


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 An overhead line or overhead wire is used to transmit electrical
energy to the trains.
 Electric trains that collect their current from overhead line use a
device such as a pantograph
 It presses against the underside of the lowest overhead wire, the
contact wire.
 Current collectors are electrically conductive and allow current
to flow through to the train and back to the feeder station

 As the contact wire makes contact with the pantograph, the carbon
insert on top of the pantograph is worn down.
 On straight track, the contact wire is zigzagged slightly to the left and
right of centre at each successive support so that the pantograph wears
evenly
 Dropper wires provide physical support of the contact wire without
joining the catenary and contact wires electrically.

REW wire Insulator Contact Wire CatenaryWire
Dropper Wire
OCS Mast
Overhead Catenary System

OCS Mast
 Erected to convey REW wire and
contact and catenary wire.
 A soil test will be carried out first
then an auger machine will drill a
hole to required depth.
 They will check before mast been
put and lastly concreting work to
strengthen the mast.

Pre-Wiring
 Consist of aluminum tube with
clip and bracket used to hold the
contact and catenary wire.
 Also attached with insulator to
divide the contact system into
some unattached electrical
departments.

Wiring
 Used to supply electricity power
to the train.
 Consist of contact & catenary
wire attached at cantilever.
 Made from copper wire cause it
is a good conductor.
 A wiring train that have a drum
cable will be used in this activity.

Registration
 After finish install pre wiring
and wiring work, a team will do
registration works.
 They will check the height and
stagger and all bracket were
tighten to ensure that everything
install smoothly.

Dropper Wire
 Dropper wires traditionally
provide physical support of the
contact wire without joining the
contact and catenary wires
electrically.
Dropper
Wire

Balance Weight
 Catenary wires are kept at a
mechanical tension because the
pantograph causes mechanical
oscillations.
 The wave must travel faster than the
train to avoid producing standing
waves that would cause wire
breakage.
 By using balance weight and
tensioning the line will makes waves
travel faster.

Drop Tube
 Usually installed at station
where mast cannot be used to
hold the wire.
 Made from steel structures to
give more stability to hold
contact & catenary wire.

APC Magnet
 The APC magnet instructs an
electric locomotive to open the
circuit breaker and switch back
afterwards.
 Ease of installation and de-mounting
of this super-strength
low-maintenance magnet saves
significant time and money.

Motorised Isolator RTU
 To isolate an electrical section
 High-voltage isolation switches
are used in electrical substations
to allow isolation of apparatus
such as circuit breakers and
transformers, and transmission
lines, for maintenance.

Neutral Section
 Short insulated dead overhead
equipment separating sectors fed by
two adjacent substations which are
normally connected to different
phases.
 The neutral section is a dead zone
and therefore, the locomotive has to
negotiate the section in momentum.
 The locomotive is switched off while
negotiating the neutral section to
avoid flash over.

Track Bonding
 Current discharge path to track
to prevent imbalance current.
 All equipment attached to the
rails shall be designed to
withstand the currents and
voltages associated with the
electric traction current

SIGNALLING
 INTRODUCTION
 EQUIPMENTS &
FUNCTIONS
 JMI PROCEDURE
 ISSUES/PROBLEM
RELATED DURING
JMI

INTRODUCTION
Signalling is a device by which the movement of the
train is controlled.
Purpose of Signalling:
Operating rail traffic, safely, speedily and economically
Increasing line capacity
Providing systems on safe principles
Preventing conflict movement on trains

EQUIPMENTS & FUNCTIONS
 Signalling cable
- To connect all equipments to the
trackside. Power supply cable consist
of 4 Core (6mm) diameter.
Point Machine
- An electro mechanical device attached
to turnouts to provide remote
operation capability, thus allowing
different routes for trains to be set.

Automatic Train
Protection
- A safety system comprises of track
mounted equipment which relays speed
information to the train equipment and
the drivers cab.
 Axle Counter
- A detection point comprises two
independent sensors, detect the
direction of a train by the order in which
the sensors are passed.

 Precast Foundation
- Foundation for Signalling equipment
cases such as EB, DB, TPCP, LSC,
Signal.
 Track Circuit
- To detect the condition of the track
segment which is occupied or not.
Consist of a power supply & the system
works under all weather condition.

 Signal Post
- Carries signal lights unit consisting
one or more aspects. Made of steel
structures.
 Signal Head
- Signal head consist of red, yellow &
green lights. Gives the train
driver necessary order & warning
about the track.

 Equipment Box (EB)
- Consist of power supply, relays and
terminal rack for signalling
equipments.
 Distribution Box (DB)
- Consist of power supply, relays and
terminal rack for signalling
equipments.

 Technician Point
Control Panel (TPCP)
- Consist of power supply to control the
point machine operation.
 SER Equipment Room
- Monitoring all signalling equipments
at the trackside. Located at the station.

 Block Line Side
Cabinet (LSC)
- Control signalling equipments at
trackside but with less equipments.
Consist of relays, terminal rack &
power supply.
 Station Line Side
Cabinet (LSC)
- Control signalling equipments at
trackside but with many equipments.
Consist of relays, terminal rack &
power supply.

 Level Crossing
- A safety barrier to stop all the traffic
and clear the track so train can pass
by. Consist of traffic light and barrier
also with alarm sound.
Uninterruptible Power
Supply (UPS)
- For back-up if there is a power failure
and to avoid any interruptions on the
systems traffic. Consist of Power
Module & Battery Module.

 Industrial Computer
- To monitor all equipments, detect any
failure from equipments. Located at
station master office.
 Shunter Panels/Local
Control Panel
- Used for shunter to get acceptance for
signal such as shunt signal.

COMMUNICATIONS
 INTRODUCTION
 EQUIPMENTS &
FUNCTIONS
 JMI PROCEDURE
 ISSUES/PROBLEM
RELATED DURING
JMI

INTRODUCTION
 The primary purpose of the communications system is to rapidly
transport data and voice signals for particular subsystems
between passenger stations and halts, operational facilities,
electrification facilities and CTC.
 The secondary purpose is to present information to various end-users
in desired formats.
 Digital Transmission System comprises 24-core fiber optic cable system
to be installed along the railway route. All voice and data traffic
throughout the system is carried within this DTS.

INTRODUCTION
Main System:-
 Digital Transmission System (DTS) / Backbone or Fiber-Optic Trunk
Subsystems:-
 Private Automatic Branch Exchange (PABX) – internal telephone
network
 PAX Type Signal Post Telephone (SPT) – wayside telephone network
 Passenger Information System (PIS) - PIDS & PA System
 Closed Circuit Television (CCTV) & Station SCADA
 Video Wall System – CTC mimic panel
 Primary Master Clock System – for standardization of time
 Uninterruptible Power Supply (UPS) & Power Surge Protector
 Data Transmission for systems by others

 Private Automatic Branch
Exchange (PABX)
To provide voice communication to
all stations, halts, new railway
offices, CTC office, new depots,
workshops, feeder Station
buildings and Line side cabinets.

 Passenger Information
Display System (PIDS)
The system will provide free-format
information on the running of
trains. This information will be
displayed in key areas of stations
and halts
Type A1 Display – Terminal
Type A2 Display –Waiting Hall
Type A3 Display – Platform at Station
Type A4 Display – Main entrance

 Public Address System (PA)
The Long Line Public Address
System will allow a central point
to make announcements (by
announcer or voice synthesizer)
To remote stations and halts either
independently or in groups.

 Telephone System (PABX)
To provide voice communication
within the railway premise
among railway personnel and
the passengers.

 CCTV
The purpose of CCTV is to provide
surveillance of critical locations
throughout the rail system for
security purposes, crowd control
and safety of passengers.

 Centralized Clock System
The purpose of the Centralized
Clock System is to provide real
time synchronization of the
sub-systems that may require
accurate real time information.

 24 Core Fibre Optic Cable
To connect all equipment at the
platform such as CCTV, speaker,
PIDS and other Comms
equipments.

ELECTRIFIED DOUBLE TRACK
PROJECT
IPOH - PADANG BESAR

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