system works knowledge sharing

MMC CORPORATION BERHAD GAMUDA BERHAD

KNOWLEDGE SHARINGSYSTEM WORK

PRESENTED BYMOHD ZAMIR ABDUL RAHMAN

QUANTITY SURVEYOR

INTRODUCTION

EQUIPMENTS &

FUNCTIONS

JMI PROCEDURE

TRACTION POWER SUPPLY (TPS)



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 will receive 132Kv supply from TNB and lowers the voltage to 25 kV which is supplied to a railway feeder station located beside the tracks.


132Kv/25Kv Power Transformer

This transformer is installed in a traction sub-stations along side the rail track and is used to feed 25KV

Circuit Breaker 132/25 Kv

Form of protection, designed to break fault current (the large volume of current)


Circuit Switchgear 25 Kv

Provides the isolation of circuits from power supplies thus protecting the people working

Isolator/Disconnector

To ensure that an electrical circuit is completely de-energised for service or maintenance.


Voltage & Current Transformer

Used for regulate current and voltage of electric currents.

25kV Swithgears in Modular Building / Control Panel

To control and protect all equipment in the modular buildings. Consist of relays, cabling, metering panels, battery.


Prefabricated Modular Building

Consist of equipment, protection panel, battery room, RTU cabinet, comm’s rack, circuit breaker, disconnector.

Remote Terminal Unit (RTU)

To monitor status of the equipment. Communicate with the station master.


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 sign JMI document after

inspection. BBAS needs to rectify SNAGLIST

before T&C


JMI PROCEDURE

The total quantities of materials and equipment shall be as per quantities identified during Preliminary Design stage.

The amount to be paid shall be pro-rata in accordance to these quantities equally.

Upon submission of the Site Inspection Form and relevant snag list, item listed below shall be certified in full or in partial for payment.


JMI PROCEDURE

Installation & Supervision Payment Milestone


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

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


InsulatorREW wire Contact Wire Catenary Wire

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 & catenarywire attached at cantilever.

Made from Aluminium wire.

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

To maintain the contact & catenary wire keep always in tensioning condition.

The wave must travel faster than the train to avoid producing standing waves that would cause wire breakage.

Balance Weight


Steel Portal c/w DropTubes

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.

Drop Tube


APC Magnet

The APC magnet instructs an electric locomotive to open the circuit breaker and switch back afterwards.

When train were passing through APC Magnet it lower down the pantograph.

APC Magnet


Motorised Isolator RTU

To isolate an electrical section.

This equipment used to allow isolation to the apparatus for maintenance purposes.


Neutral Section

Short insulated dead overhead equipment separating sectors fed by two adjacent substations

The locomotive has to negotiate the section on its own 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

Track Bonding


JMI PROCEDURE


INTRODUCTION

EQUIPMENTS &

FUNCTIONS

JMI PROCEDURE

SIGNALLING



INTRODUCTION

Signalling is a device by which the movement of the train is controlled.

Purpose of Signalling:

Operating rail traffic, safely, speedily and economically

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

- Transponder is a safety devices that

mounted on sleeper which relays speed information and position of the movement of train to the CTC.

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 (3 aspest). Gives the train driver necessary order & warning about the condition of 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.



Station Line Side Cabinet (LSC)

- Control signalling equipments at

trackside. 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. Only on temporary signaling staging works.

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.


JMI PROCEDURE


INTRODUCTION

EQUIPMENTS &

FUNCTIONS

JMI PROCEDURE

COMMUNICATIONS



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.


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 Commsequipments.


Communication Rack

Consist of relays and power supply used to monitor all communication equipments.


JMI PROCEDURE



ELECTRIFIED DOUBLE TRACK PROJECT

IPOH - PADANG BESAR

system works knowledge sharing

Engineering

lowest overhead wire

kv supply

contact wire

kv swithgears

kv form of protection

stepdown transformer

power supplies

electric trains