Industrial training 9TH March 2015 31 may 2015

Industrial TrainingTnb Distribution9TH March 2015 31 may 2015Mohamad syafiq bin AbdullahEE089872May 2015CONTENTSelf introductionIndustrial training objectivesCompany profileTraining activity

SELF INTRODUCTIONName : Mohamad Syafiq Bin AbdullahDate of birth : 17 November 1993ID number : EE089872Age : 21 Hometown : Kepala Batas, Pulau PinangInstitution : Universiti Tenaga Nasional (UNITEN)Course : Bachelor of Electrical and Electronics Engineering (Hons.)

INDUSTRIAL TRAINING OBJECTIVETo provide the students to the world of work so that they can relate theoretical knowledge with application in industryTo build and increase creative and positive thinking when overcoming engineering problems.To improve my soft skills such as communication, management and team-work.Enhancing the potential of the student to with the situation that they encounter.

Company profileThe TNB a public listed company with responsibilities:To generate, transmit, distribute and sell energy to customer throughout Peninsular Malaysia.To plan, install, operate and maintain electricity installation for the generation, transmission and distribution of electricity.

To achieve the above objectives, the company owns and operates power plants and the National Grid and installed for this purpose, customer service center, call management center, substations and administrative offices throughout Peninsular Malaysia. TNB`s core activities are in generation, transmission and distribution of electricity which are being handled by its subsidiaries:

TNB Generation Sdn BhdTNB Transmission Network Sdn BhdTNB Distribution Sdn Bhd

TNB Vision: To be among the leading corporation in energy and related business globally. TNB Mission: We are committed to excellence in our product and service.

INDUSTRIAL TRAINING SCHEDULE9 MARCH 2015 UNTIL 31 MAY 2015DATEDEPARTMENTAMOUNT OF DAYMAIN ACTIVITY REPORT09/03/2015-05/04/2015

PLANNING &CONSTRUCTION28PROJECT PLANNING

CABLE

SUBSTATION

OVER HEAD

EN NORAZMI BIN ARIFFIN06/04/2015-03/05/2015METERING28METER

SERVICEEN MOHD FADZLI BIN MOHD TAHIR04/05/2015-28/05/2015OPERATION&MAINTENANCE28SUBSTATION

OVER HEAD

CABLE

FAULT FINDER

EN. AZLI HILMI BIN FAUDZI@MD RAWIconsturction departmentIn construction department, they responsible to construct substation and overhead pole. Usually, contractor will do the initial work like dig hole for joining, places the switchgear or transformer, place the pole and the other work. Apart from that, TNB also responsible to shut down the substation that involved in the construction before the contractor start doing their job to avoid accident from happening.The important work in construction job is joining cable to make sure that the new substation will get the supply to operate . Furthermore joining cable is done when there is breakdown which happened because the cable is damaged.

Type of cable

Paper Insulated Lead Cable (PILC)Cross Linked Polyethylene (XLPE)Cable RatingPILCAmpXLPEAmp259015032070160240400120230500550185290300380Joining cableThere two types of joining cable that are:Straight through jointTermination joint

Termination joint straight through joint

Breakdown of cable

Low Voltage Overhead LinesPresently all new lines are constructed using aluminum. Copper conductors are used only for repair of copper lines.

Advantages of Aluminum :cheaper than copper lighter and easier to handleless scraper value, not prone to theft

Disadvantages of Aluminum :softer than copper and required careful handlingoxidizes easily making connections more difficult

Conductor ratingABCAmpBAREAmp1X16+25803/1321203X16+25807/1221703X95+701907/1221703X185+120300

Poles For LV Overhead LineFour types of poles are used in the TNB :Wood PolesPre-stressed Spun Concrete polesReinforced Concrete Poles

The functions of poles are:To support conductors and accessories such as fuses and cable boxesThe safety clearance from the ground, building are maintained

The standard lengths are:10 meter- for HT cable (HV)9 meter - for overhead mains (LV)

High Voltage CableThe 11kV supply that feeds into switchgear comes in the XLPE cable (HV cable). In one cable, have three cores (R, Y, B) which is connected to the three terminals of incoming feeder of the switchgear. From the switchgear, the supply goes to the HV side of the transformer through XLPE cable

SwitchgearTransformerFeeder PillarPlanning departmentThis department is responsible to estimation the project include in designing, planning in all new project requested by users and modified system available depends on situation.

This department also responsible to calculate maximum demand, cable size, calculate load, and determine suitable transformer size and switchgear for consumerEstimating the projectEstimation of substation project involves working out the cost of the followingLandSalariesMaterialsContractTransportOverhead

SITE VISIT

Site visits are essential before planning starts. The following can be obtained from site visits.a) Sources of supplyb) Types of loadsc) Site information on:TreesGround conditions and terrainOther services on site such as telephone lines and water mains.Drains, stream, ponds etc

MAKING A Site visit

Metering unitType Of Metering Used To Consumer :a) Ordinary power consumer meter (OPC meter) b) Large Power consumer meter (LPC meter)

Type of meteringThere are three types of metering1. Single phases metering (OPC meter).The current value uses in fuse about 10-50 A. Use two wire connected from supply to meter board consumerHaving one cut out and one neutral link

2. Three phase metering (OPC meter)The current value uses in fuse about 10-60 A. Used four wire connected from supply to meter board consumerHaving one neutral link and three cut out

3. Large power consumer meter (LPC meter). Use digital electronic meterUse current transformer

Component of meter a) The devices at meter board are

Cut outNeutral linkMeter

Thank you