TNB Electricity Supply Application Handbook ESAH

TENAGANASIONAL BERHAD

Vision

Tobeamongtheleadingcorporationsinenergyandrelatedbusinessesglobally

Mission

Wearecommittedtoexcellenceinourproductsandservices

Sharedvalues

Oursharedvaluesprovideuswithaprinciplethatwillshapeourbusinessethicsandoperations

q Customer firstqBusinessexcellenceq IntegrityqCaring


Acknowledgement

Tenaga Nasional Berhad would like to acknowledge those that have actively contributed towards this effort in revisiting the TNBs Supply Application Handbook initially launched in 2001.

In our endeavor to provide more effective and efficient service to our customers, your inputs have been of tremendous help to us to further improve and add more substance to the initial First Edition.

Special thanks to Federation of Malaysia Consumers Association (FOMCA), Federation of Malaysian Manufacturers (FMM), Association of Consulting Engineers of Malaysia (ACEM), The Electrical and Electronics Association of Malaysia (TEEAM), Real Estate and Housing Developers Association (REHDA) and Jabatan Kerja Raya (JKR) for their written comments and all others that have contributed in more ways than one to the publication of the 2nd Edition of the Supply Application Handbook.


CONTENTS

SUPPLYAPPLICATION.0 Tenaga Nasional Berhad Electricity System ........................................................................5.0 Supply Application for Load up to 00kVA ...................................................................... .......................................................................0 Supply Application for Load Exceeding 00kVA ............................................................. ..............................................................0 Application Process for Streetlight ....................................................................................0

CONNECTIONGUIDELINES.0 Planning for Connection .....................................................................................................0 Planning and Design Criteria .............................................................................................9.0 Demand Estimation ............................................................................................................0 Supply Schemes .................................................................................................................

METERINGGUIDELINES.0 General ............................................................................................................................5.0 Single Phase Metering .......................................................................................................5.0 Three Phase Whole Current Metering ...............................................................................5.0 Group Metering For Whole Current Metering ..................................................................555.0 LVCT Metering ..................................................................................................................566.0 Medium and High Voltage Metering .................................................................................58

GLOSSARYANDDEFINITIONS ...........................................................................................6

APPENDIX .................................................................................................................................69


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CONTENTS

1.0TENAGANASIONALBERHADELECTRICITYSYSTEM.......................................55. Introduction ..........................................................................................................................5. Distribution Division ...........................................................................................................5. Kedai Tenaga .......................................................................................................................6. Voltages ...............................................................................................................................7.5 Supply Frequency ................................................................................................................7.6 Earthing System ...................................................................................................................7.7 Short Circuit Ratings ...........................................................................................................7.8 Act, Regulation and Code ....................................................................................................8.9 Supply Voltage Options .......................................................................................................8.0 Types of Supply Application ...............................................................................................9. Consumer Standby Supply ..................................................................................................9..................................................................................................99. Alternative Source of Supply ..............................................................................................9 ..............................................................................................99. Provision of Temporary Supply ........................................................................................0 ........................................................................................00. Single Tenant Premise .......................................................................................................0.......................................................................................................00.5 Multi Tenanted Premises ...................................................................................................0...................................................................................................00.6 Turnkey Projects ...............................................................................................................0 ...............................................................................................................0...............................................................................................................0.7 Connection Charges...........................................................................................................0.8 Tariff .................................................................................................................................. .....................................................................................................................................................................................................................................................................9 Request for Additional or Special Features ....................................................................... ...............................................................................................................................................0 Service Level Agreement (SLA) ....................................................................................... ..............................................................................................................................................................................

2.0SUPPLYAPPLICATIONFORLOADUPTO100kVA ....................................................................................... Purpose .............................................................................................................................. ............................................................................................................................................................................................................................................................. What the Applicant Should Do .......................................................................................... ..................................................................................................................................................................................... What the Electrical Contractor Should Do ........................................................................ ................................................................................................................................................. TNB Supply Lead Time .................................................................................................... .........................................................................................................................................................................................................5 Dispute Between Applicant and Electrical Contractor ...................................................... ............................................................................................................

3.0SUPPLYAPPLICATIONFORLOADEXCEEDING100kVA ............................... Purpose ............................................................................................................................................................................................................................................................. Application Process ....................................................................................................................................................................................................................... Application Parts .............................................................................................................................................................................................................................. Part A : Authorities Approval Process .......................................................................................................................................................... Part B : TNB Technical & Financial Approval Process ...................................................5...................................................55. What The Applicant Should Do ........................................................................................6........................................................................................66.5 Supply Project Lead Time .................................................................................................7.................................................................................................77.6 What The Electrical Consultant Engineer Should Do .......................................................8.......................................................88.7 Dispute Between Applicant and Electrical Consultant Engineer ......................................9......................................99

4.0APPLICATIONPROCESSFORSTREETLIGHT ....................................................0 . Purpose ..............................................................................................................................0..............................................................................................................................00. Types of Applications ........................................................................................................0........................................................................................................00. Application by Developer ..................................................................................................0..................................................................................................00. Application by Individuals/ Local Authority/Government Authority ..............................................................0

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5TENAGANASIONAL BERHAD

Area States

Region Selangor, Wilayah Persekutuan, Putrajaya/Cyberjaya,Negeri Sembilan, Melaka and Johor

Region Perlis, Kedah, Pulau Pinang, Perak,Pahang, Terengganu and Kelantan

1.0 TENAGANASIONALBERHADELECTRICITYSYSTEM

1.1 Introduction

The Tenaga Nasional Berhad (TNB), a public listed company registered under Companies Act 965, is charged with the following responsibilities

To generate, transmit, distribute and sell energy to consumer 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 operate power plants and the National Grid, and installed for this purpose, consumer service centres, call management centres, substations and administrative offices throughout Peninsular Malaysia. TNBs core activities are in generation, transmission and distribution of electricity which are being handled by Divisions :

Generation Division Transmission Division Distribution Division

1.2 DistributionDivision

Distribution Division supplies electricity in strict accordance with the provisions of the Electricity Supply Act 990, the Licensee Supply Regulations 990 and the Electricity Regulations 99 (and all amendments thereto). Distribution Division is divided into 2 main regional operational areas where operational efficiency is further enhanced through the creation of main regional areas, headed by the respective Senior General Managers which covers :

The States are comprised of main jurisdiction areas under the care of Area Managers. Some areas have smaller jurisdiction areas and are managed by Branch Managers. All district offices (areas and branches) have one or more Kedai Tenaga under their jurisdiction.

Kedai Tenaga provides functions pertaining to Application for Supply, Billing & Collection, Upgrading of Services and other consumer related activities.

The technical aspects of the operations of the areas include planning, designing, construction, and system operation and maintenance that delivers supply to the Consumer.

The support departments at the headquarters include Finance, Engineering, Human Resource Management, Materials Resource Management, Strategic Management and Organisational Development and Consumer Services and Marketing.

6 TENAGANASIONAL BERHAD

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1.3 KedaiTenaga

Kedai Tenaga is TNBs Service and Advisory Centre. It provides TNBs consumers with Consumer Service and Elektrik Bestari, TNBs first branded service that provides electricity advisory service for the home. There are 5 Kedai Tenaga centres throughout Peninsular Malaysia at your service. Please refer to Appendix for complete information on Kedai Tenaga centres throughout Peninsular Malaysia. This list is subject to changes and may be reviewed from time to time.

Kedai Tenaga is where TNB as a caring and friendly utility touches base with its consumers. At Kedai Tenaga, you may experience directly our value-added services which we have specially made available to you, our valued consumers. Services provided at Kedai Tenaga include:

a) Onestoppaymentcounterforallelectricityandotherutilitybills. Come and meet our friendly personnel who will handle all your utility bills transactions. Payment can be made by cash, cheque or credit card. You can also make arrangements to have your electricity bills paid through banks or ATM cards. TNB, being a caring company, is always concerned about elderly and handicapped consumers who have genuine problems in settling their bills due to financial difficulties. TNB is aware of the difficulties encountered and special arrangements can be made for easy payment schemes for this group of people.

b) Electricitysupplyapplication At Kedai Tenaga, we offer you advice on all matters pertaining to your supply application. For wiring purposes in your house, you may choose from a varied selection of contractors

from our directory of registered electrical contractors. This directory enables you to select a contractor who is base close to your home. It ensures further efficiency and convenience.

We help you to find out the requirements for supply application in your home.

c) Inquiriespertainingtobillingandothers. Come and visit us to discuss or obtain further clarification on any billing inquiries that you

have. Our front line staff will be happy to help you in resolving any problems you might have with these inquiries.

d) TNBalsooffersthefollowingservicestoitsvaluedconsumers: Appointments to have the meter read in case the premises are locked during working hours. Meter change if consumers suspect that the meter is faulty. If a consumer feels that the meter is

not recording accurately, a written application should be submitted to have the meter tested. A fee of RM5 will be charged. However, if upon testing the meter it is found that the inaccuracy is more than %, the meter will be replaced and the testing fee of RM5 will be refunded.

Reconnection of supply to consumers premises if the supply is disconnected due to change of tenancy (if the premises have been vacant for more than months) or nonpayment bill. For disconnection due to nonpayment of electricity bills, outstanding balances need to be paid before electricity supply can be reconnected.

Disconnection of supply if there is a change of tenancy.

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e) ElektrikBestari

TNB provides electricity advisory for the home. Our Kedai Tenaga has an Elektrik Bestari corner which provides consumers with basic information on energy efficiency, safety and related topics. For enquiries on electricity advisory, consumers may enquire at any nearest Kedai Tenaga.

1.4 Voltages

The transmission voltage networks are 500kV, 75kV and kV, whilst the distribution voltages are kV, kV and 5/0 Volts. However, in the case of certain parts of Johor & Perak the distribution voltages may also include kV and 6.6kV.

1.5 SupplyFrequency

The supply frequency is 50Hz %.

1.6 EarthingSystem

HighVoltageandExtraHighVoltage

3 phase configuration solidly earthed or impedance earthed overhead lines and underground cable are used extensively for high and extra high voltage distribution

LowVoltage415/240V

phase wire system neutral point solidly earthed mixture of overhead lines, underground cables and aerial insulated cables mixture of overhead lines, underground cables and aerial insulated cables

1.7 ShortCircuitRatings

As a guide, the maximum fault levels for the various voltage systems are as follows. All equipment proposed to be installed and connected to TNB supply must comply with the stated short circuit ratings:

System Shortcircuitratingfor3si. 500kV 50 kAii. 75kV 0 kAiii. kV .5 kAiv. 66kV 0 kAv. kV 5 kAvi. kV 0 kAvii. kV 0 kAviii. 6.6kV 0 kAix. 5/0 V .5 kA


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1.8 Act,RegulationandCode

The electricity supply and installation practice in Peninsular Malaysia are governed by the following :-

1.9 SupplyVoltageOptions

Supply may be provided at any of the declared voltages :-

75 kV, kV, kV, kV*, kV, 6.6 kV* and 5/0V. Generally, supplies to domestic premises are given at single phase -wire or three phase -wire. However, the actual supply voltage provided depends on the magnitude of the individual applicants load requirements :-

LowVoltage

i. Single-phase, two-wire, 0V, up to kVA maximum demand

ii. Three-phase, four-wire, 5V, up to 5 kVA maximum demand

iii. Three-phase, four-wire, C.T. metered, 5V, up to ,000 kVA maximum demand

MediumVoltage&HighVoltage

i. Three-phase, three-wire and kV for load of ,000 kVA maximum demand and above

ii. Three-phase, three-wire, kV or kV for load of 5,000 kVA maximum demand and above

iii. Three-phase, three-wire, 66kV, kV and 75kV for exceptionally large load of above 5 MVA maximum demand

It should be noted that voltages other than the above classifications couldnt be provided by TNB. However, consumers can make their own transformation arrangements where necessary.

System for certain parts of Johor and Perak only.

1 Electricity Supply Act 990 Act 7 2 Licensee Supply Regulations 9903 Electricity Regulations, 99 4 Occupational, Safety & Health Act 995 Malaysian Standard MS IEC 606 Electrical Installation of Buildings

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1.10 TypesOfSupplyApplication

All new applications and upgrade of supply requirement can be classified into three (3) types of supply applications.

1) SupplyApplicationForLoadUpTo100kVA

Supply usually from existing supply mains Submission of applications to TNB by Electrical Contractor registered with the Energy Commission Connection of supply may take a maximum of weeks upon approval from the local authorities

2)SupplyApplicationForLoadExceeding100kVA

Supply may require establishment of new substation/substations Submission of applications to TNB by Consultant Engineer Connection of supply may take a minimum of 6 months depending on the extent of electrical infrastructure

required and approval from the local authorities

3)SupplyApplicationForStreetlight

Application made by the local authority/government department Application by developer Application by individual

For any supply involving co-generating, a separate licence need to be obtained from the relevant governing authority.

1.11 ConsumersStandbySupply

Standby generator(s) may be used by the applicant at their premises, subject to compliance with the relevant laws. The generators shall remain a separate system from TNB distribution system and the applicant shall declare to TNB on the safe installation of the generator(s). This may be used in place of TNBs supply source through a suitable, approved changeover facility under emergency conditions. The Energy Commission and other relevant authorities govern the generators and standby supply.

1.12 AlternativeSourceofSupply

A large consumer may require an alternative source of supply. TNB will provide such alternative supply at an additional cost.


1.13 ProvisionOfTemporarySupply

Temporary supply can be installed for a period of 6 months. Supply is intended for purposes of electric supply for temporary work site, festivals and celebrations. The applicant shall provide a suitable corridor for installation of supply mains and site for metering point. The meter will be installed at a meter board provided by the applicant. The Electrical Contractor shall test the installation.

If the requirement exceeds 6 months, the approval shall be subject to availability of supply

Application for temporary supply shall be separately submitted, stating the load requirements. The applicant will be charged full cost and according to the appropriate tariff plus an additional % surcharge on the total monthly bill.

1.14 SingleTenantPremises

If the supply is for a single tenant only (the owner, the developer or the landlord) then the entire supply will be metered at the applicants incoming switchboard. The consumption will be charged at the appropriate tariff rates.

1.15 MultiTenantedPremises

If the supply is for multi tenanted premises where part of the supply is intended for the owner, developer or landlord, and the rest for the tenants in the building, the landlords supply and each of the tenants supplies will be separately metered and billed by TNB.

The owner, developer, or landlord shall provide, own, maintain and repair at his own expense the electrical systems in the buildings including adequate and necessary rising and lateral mains. The design, installation and operating of such electrical systems shall comply with requirements of all the relevant authorities including the Energy Commissions and TNBs.

1.16 TurnkeyProjects

In certain cases, the applicant may apply to undertake the planning and installation of the electrical systems (including overhead lines, switchgears, cables, based on TNBs specifications and requirements) with the assistance of Electrical Consultant Engineer(s) and Electrical Contractor(s). Under the turnkey concept the applicant will then hand over the entire electrical system to TNB. A separate discussion on this will have to be conducted with TNB.

1.17 ConnectionCharges

Please refer to the Statement of Connection Charges booklet available at the Kedai Tenaga. The booklet is subjected to change as may be published from time to time.

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1.18 Tariff

Please refer to the Tariff booklet available at the Kedai Tenaga. Tariffs are subjected to change as may be published from time to time and approved by the Minister of Energy, Water and Telecommunication

1.19 RequestForAdditionalOrSpecialFeatures

Any request for additional or special features eg special request for an additional feeder by applicant, the applicant will have to pay the full cost of the additional request.

1.20 ServiceLevelAgreement(SLA)

Offer is open to all housing developers to enter into a Service Level Agreement (SLA) with TNB when applying for electricity supply for housing development (as prescribed under the Housing Development (Control and Licensing) Act 966). The scope of the SLA includes the time frame process for connection of supply and the duties and obligation by TNB and housing developers in ensuring the electricity supply is connected to the housing projects within the stipulated time to avoid delays in handing over houses to the purchaser.

Please refer to the Kedai Tenaga for details on the SLA.


2.0 SUPPLYAPPLICATIONFORLOADUPTO100kVA

2.1 Purpose

The application for the supply of electricity with load up to 00kVA which is for a phase low voltage system is outlined here.

2.2 WhatTheApplicantShouldDo

The applicant should take the following steps to apply for supply of electricity up to 00kVA for a -phase low voltage system.

2.3 WhatTheElectricalContractorShouldDo

The Electrical Contractor appointed by the applicant should take the following action:

Steps Action Reference

1Appoint an Electrical Contractor who is registered with The Energy Commission, who will act on their behalf and submit the application for the applicant using the Supply Application Form available at Kedai Tenaga.

The Electrical Contractor must be registered with the Energy Commission

2 Settle connection charges billed by TNB through the Electrical Contractor

Statement of Connection Charges

booklet available at any Kedai Tenaga

3

After completion of TNBs work (before installation of meter), the applicant shall: Deposit a sum of money equivalent to months bill or as reviewed from

time to time. For deposit of more than RM,000, the applicant can settle either in cash or Bankers Guarantee

Sign electricity supply contract with TNB through the appointedElectrical Contractor

Tariff booklet available at the nearest Kedai Tenaga


1 Submit application for the applicant using the Supply Application Form available at Kedai Tenaga.

All documents in checklist must be completed, duly endorsed by the appropriate competent person(s) of the appropriate category and attached with the application.

Appendix

2 After TNB has : validated compliance to checklist conducted analysis of supply connection reviewed connection charges and issue bill to contractor

The applicant shall settle connection charges to TNB.

Statement of ConnectionCharges Booklet available

at any Kedai Tenaga

3 AfterTNBhas implemented work on site, the Electrical Contractor shall: Submit G and H form certifying the internal installations

have been tested Arrange for applicant to sign supply contract with TNB Arrange appointment for meter installation with TNB

Tariff Booklet available at nearestKedai Tenaga


2.4 TNBSupplyLeadTime

The flowchart for the application process is as outlined in Appendix 2.TNB supply lead-time will take up to weeks depending on the approval from the local authorities.

2.5 DisputeBetweenApplicantAndTheElectricalContractor

In the event of a dispute between the applicant and the Electrical Contractor and the applicant wishes to terminate the services of the Electrical Contractor, the applicant shall duly notify the Electrical Contractor concerned in writing with the copy extended to TNB. TNB shall not be a party to any dispute or litigation arising thereof.


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3.0 SUPPLYAPPLICATIONFORLOADEXCEEDING100kVA

3.1 Purpose

To explain the process for supply application with load exceeding 00kVA.

3.2 ApplicationProcess

The application process incorporates not only TNB requirements but taking into account the Government Development Plan Approval Process in Peninsular Malaysia (except Wilayah Persekutuan Kuala Lumpur and Putrajaya) issued by the Bahagian Perancangan Dasar & Pembangunan Kementerian Perumahan dan Kerajaan Tempatan: 00 Edition.

The inclusion of the said Government procedure shall ensure :

Infrastructure planning and approval process of the TNB complements the National Policy TNB as a member Agency of the Government Development Plan Committee has to ensure complete

transparency of its process through timely responses to Development Plan Approval Process TNB Supply Application Process ensures complete agreement of Distribution Divisions plans and the

Consultant Engineers submissions especially on the location and size of substations needed for the supply of electricity to the development area, and is valid for years after the approval from the Jabatan Perancang Bandar & Desa (JPBD).

3.3 ApplicationParts

There are two parts to the application :

Part Function Reference

A Requirement of Approval from the Governments Development Plan Approval Process Appendix & 5

B TNB Application Requirement after completion of Part A Appendix 7

Stage Description

Submit Development Plan

The Consultant Engineer submits development plan application for the proposed development to JPBD.All plans must be prepared by a licensed surveyor.The comments from all relevant technical agencies including TNB are required prior to approval by JPBD.

PARTA:AuthoritiesApprovalProcess

The part A process approval that involves TNBs technical comments is as shown in Development Plan Approval Process in Appendix & 5. At each application process, TNB requires a processing time of up to 0 days to complete the comments for Jabatan Perancang Bandar & Desa (JPBD). The main process can be summarised as follows :

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PARTB:TNBTechnical&FinancialApprovalProcess

Part B process is the TNB Application Process for Electricity Supply above 00 KVA as outlined in Appendix 7. The process starts after the completion of Part A (Authorities Approval Process). The Process in Part B can be summarised as follows:

Stage Description

TNBRegisterApplication

The Consultant Engineer/JPBD submits application to TNB complete with required details as in Checklist in Appendix 6. TNB will:

Acknowledge receipt and gives a file number, which is used as reference in any dealings with TNB.

Study the proposal. Match the existing system network and determine method of supply.

MutualUnderstandingOfPlan

Both TNB and Consultant Engineer will conduct discussion to agree to technical requirement such as substation number, size, location, site and consumers main switch room.

In case of a dispute on TNB proposal, the Consultant Engineer shall refer to the relevant State General Managers. A discussion shall be arranged by the relevant State General Managers to arrive at an agreement.

TNBSubmitCommentstoJPBD

TNB submit to JPBD the proposed development plans including all technical comments using TNB official stamp as required by JPBD.JPB approves the proposed development plan. The validity is subjected to:- confirmation of layout details and precomputation plans- no changes in development - years extension

5 TNB Application for Electricity Supply above 00KVA process starts (Part B)

Stage Description

SubmitApplication

The Electrical Consultant Engineer submits application for the Electricity Supply to the nearest Kedai Tenaga. Complete details as in Appendix 6 must be submitted with the application.

TNB will issue an acknowledgement letter to the Electrical Consultant Engineer as in Appendix 8 using the same file reference given during Part A (Authorities Approval Process).

DocumentationCheckAndSystemStudy

TNB will advise on the necessary amendment to the consultant by telephone or letter. The Electrical Consultant Engineer is to ensure that all the amendments are done and resubmitted to TNB.


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Stage Description

JointMeeting

TNB will restudy the amendments and arrange for a joint meeting with the Electrical Consultant EngineerElectrical Consultant Engineer Consultant Engineer for final acceptance of the technical requirements. Activities of both parties will be recorded in the Joint Meeting Action Log as in Appendix 9.

ConnectionCharges

TNB will issue a Notice of Connection Charges to the Electrical Consultant Engineer as per Appendix 0.

5 ElectricityInfrastructureAgreement(Optional)

The applicant may decide to enter into an Electricity Infrastructure Agreement with TNB with regard to TNB scope of work, charges and timely connection.

6 DiscussionAndPreparationOfSiteWork

After payment of connection charges, the Electrical Consultant Engineer will arrange for pre start work discussion and site and substation building hand over.

7 ConstructionCompletionAndSubstationEnergising

TNB will manage the construction work and is responsible for the commissioning of substations. TheThe energising of supply by TNB will normally be done at the same time as the installation of the meters. For HV supply, the supply shall be energised in the presence of the Electrical Consultant Engineer and for LVElectrical Consultant Engineer and for LV Consultant Engineer and for LV consumers in the presence of the Electrical Contractor.

8 Supply Application By The Electrical Contractor

The Consultant Engineer advises the Electrical Contractor to submit supply application for load requirement up to 00kVA, normally for individual applicant. The process is the same as outlined in Section .


1 Appoint one () Electrical Consultant Engineer for each supply application

Submit an appointment letter of the Electrical Consultant Engineer allowing him to act on behalf of the applicant to TNB.

Appendix

3.4 WhatTheApplicantShouldDo

The applicant should take the following action in applying for supply application for load exceeding 00KVA.

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2 After approval from JPBD and TNB completion of work plan, the applicant settles connection charges to TNB at any Kedai Tenaga.

The applicant may decide to enter into an Electricity Infrastructure Agreement with TNB with regard to TNB scope of work, charges and timely connection.

Statement of Connection Charges Booklet available at

Kedai Tenaga

3 Provide the substation(s) land and building(s) to TNB by:- Leasing the substation land at a nominal value of RM0.00 to TNB, or- Transfer the substation land at a nominal value of RM0.00 to TNB

The Certificate of Fitness of the substation building/compartment shall be handed to the TNB.

The transfer of the land title should be finalised prior to the handing over of site. In the absence of the land title, the applicant is to prepare a Bank Guarantee for TNB for the period of twelve () months and shall be renewed until the land title is transferred to TNB or registration of lease to TNB

Delay in title transfer may affect project implementation. TNB have the right to use the substation to supply electricity to other consumers.

Statement of Connection charges booklet available at

Kedai Tenaga

4 Applicants are required to:

Deposit a sum of money equivalent to months bill or as reviewed from time to time. For deposit of more than RM ,000, the applicant can settle either in cash or Bankers Guarantee.

Sign electricity supply contract with TNB through the appointedElectrical Contractor.

3.5 SupplyProjectLeadTime

The lead-time for supply connection depends on a number of factors including the type of premises, the electrical load required and the location of the premises and approval of the local authorities.

Applicants should submit their applications for supply as early as possible giving the necessary information of their requirements to the nearest Kedai Tenaga. They must also inform TNB of the progress of their project(s). The above measures are necessary to ensure that TNBs supply projects are coordinated with the construction and wiring installation at the applicants premises, and thus avoid any delay in connection of supply. The typical supply project lead time required by TNB is as follows:


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Requirement SupplyProjectTypicalLeadTime kV and above years 5 years

kV 8 months - years kV 6 months months

5 V and below Less than 6 months

Steps Action

1 Submits application for the proposed development to JPB and TNB All plans must be prepared by a Licensed Surveyor

Liaise with TNB to come up with a mutual understanding of plan and to get approval by JPBD

2

Submits application for the electricity supply to Kedai Tenaga.

Complete details as outlined in Appendix 6 and must be submitted with the application. The application must be accompanied by copies of the following :-

i) Location planii) Site plan showing the lot number(s)iii) The plan of the proposed substation (when relevant)iv) The proposed electrical wiring system designsv) The proposed consumers switchroom (where applicable)

vi) The approval of the building plans by the relevant Authorities

Clearly state details of the applicants supply requirements. Provide a comprehensive description of the proposed development and a list including all detail of the connected loads, motors/appliances, the associated ratings, type of motor starter and their arrangements (where applicable).

Submit the metering requirements for CT Meters as in Appendix 20.

3 Ensure that all the amendments are complied with and resubmitted to TNB.

4

Ensure that the applicants main switchroom shall be located adjoining the TNBs substation or as mutually agreed to be most appropriate under the specific design

Provide appropriate cable trenching from the TNBs substation to the main switchroom and a panel/cubicle for metering or a free standing meter cubicle in the case of high voltage installation in the consumers switchroom or

substation Ensure that consumer switchgears, control gears, transformers, relay panels, switchboards, metering current

transformer, potential transformer etc. to be connected to TNBs system must be approved by the Energy

Commission.

5 Appoint an Electrical Contractor for wiring up the premises Provide installation test results and protection settings for all CT metered applicants.

6 Ensure that the wiring and the installation work of applicants equipment shall be supervised by competent person(s).

3.6 WhatTheElectricalConsultantEngineerShouldDo

The Electrical Consultant Engineer plays a major role to represent the applicant and ensure compliance with other relevant government departments and TNB. The Electrical Consultant Engineer is advised to observe the steps as outlined below:

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Steps Action

7Advise applicant to submit application form through registered Electrical Contractor. The process is the same as outlined in Section .

8Advise applicant to deposit a sum of money equivalent to months bill or as reviewed from time to time. For deposit of more than RM,000 the applicant can settle either in cash or Bankers Guarantee.

3.7 DisputeBetweenApplicantAndElectricalConsultantEngineer

In the event of a dispute between the applicant and the Electrical Consultant Engineer and the applicant wishes to terminate the services of the Electrical Consultant Engineer, the applicant shall duly notify the Electrical Consultant Engineer concerned in writing with the copy extended to TNB. TNB shall not be a party to any dispute or litigation arising thereof.


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4.0 ApplicationProcess for StreetlightforStreetlight

4.1 Purpose

This procedure outlines the process for the application for streetlight.

4.2 TypesofApplications

The three () types of application for streetlights are:

Application made by the local authority/government authority

Application by developer

Application by individual

4.3 ApplicationbyDeveloper

The local authority or developer should take the following steps to apply for streetlight.

4.4 ApplicationByIndividuals/LocalAuthority/GovernmentAuthority

The application process is similar for both individuals and local authority or government authority. Individuals must already have an account with TNB. The installation of streetlight depends on:

Installation of streetlight on existing TNB pole

Installation involving additional poles

Steps Action

Appoint a Consultant Engineer and an Electrical Contractor that is registered with the Energy Commission.

The application is made together with the supply application for a new housing development with all the load details of the proposed public lighting that is approved by the local authority.

IF THEN

Installation of streetlight on existing TNB pole Consumer submits application to the Kedai Tenaga.

Installation involving additional poles

The applicant settles the full cost of additional new pole/poles installed.


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PageCONTENTS 1.0 PLANNINGFORCONNECTION.......................................................................................... Declaration Of Loads And Its Characteristics ............................................................................

.. Supplies at 5V and 0V ................................................................................. Technical Requirements For Connection ............................................

.. Supplies at 75kV, kV, kV, kV, kV and 6.6kV ................................. Supplies To Embedded / Distributed Generators .............................................

... Planning Data Requirements For Connection of Embedded / Distributed Generators............................................................................ Pre-connection Studies For Embedded / Distributed Generators .......

. Other Information Requirements ..................................................................................

2.0 PLANNINGANDDESIGNCRITERIA................................................................................ Steady-State Supply Voltage Performance ..................................................................... Supply Security Level ...................................................................................................

2.2.1 Adopted Security Level Definitions For TNB Distribution System .................. Supply Security Level to Consumers ................................................................. Request For Higher Supply Security Level .....................................................

. Power Quality ................................................................................................................. Power Quality Requirements ............................................................................. Scope .................................................................................................................. Voltage Dips/Sags .............................................................................................. Voltage Step Change ..........................................................................................5 Voltage Fluctuations and Flicker .......................................................................6 Harmonics ..........................................................................................................7 Voltage Unbalance ...........................................................................................

. Short-Circuit Levels .......................................................................................................5 Protection Requirements ...............................................................................................

.5. Basic Requirements ..........................................................................................2.5.2 Specific Requirement .........................................................................................5. Protection System Evaluation Process .............................................................

3.0 DEMANDESTIMATION ............................................................................................ Demand Estimates For Consumer Sub-Classes Or Premises ......................................... Group Diversity .............................................................................................................. Demand Estimates For A Mixed Development Area ..................................................... Demand Projection And Substation Requirements For LV Scheme .............................

4.0 SUPPLYSCHEMES................................................................................................................... Maximum Demand Levels And Supply Schemes .......................................................... Substation Categories, Type & Design ..........................................................................

.. Sub-Station Categories ....................................................................................... Land Or Building Size Requirements For Sub-Station ...................................... Type Of Fire Fighting System For The Sub-Station .........................................

. Standard And Special Feature Design Schemes ............................................................. Supply Schemes For Interconnection To Embedded Generators ..................................


SECTION1:PLANNINGFORCONNECTION

Sets of data and information are to be furnished by Electrical Contractors and Electrical Consultant Engineers acting on behalf of consumers or developers at the time of application of supply and prior to connection of supply.

Based upon submitted data and information, TNB will plan for the connection system to satisfy the planning and design criteria and use the best engineering practices to ensure reasonable cost of equipment, materials and workmanship as well as reasonable time period for connection of supplies.

1.1DECLARATIONOFLOADSANDITSCHARACTERISTICS

TNB requires adequate information on magnitude and characteristics of the loads to be consumed by consumer or installation.

1.1.1Suppliesat415Vand240V

For supplies at Low Voltages of 0V and 5V, the Consumer shall, in the appropriate application forms for connection obtainable from TNB provide the following data.(a) Maximum power requirements in kVA;(b) Types and number of equipment and its corresponding connected capacity in kVA;(c) Shunt connected reactors and capacitors in kVAr;(d) The date when connection is required; (e) For single-phase 0V motors with rating of greater than 6kVA and/or three-phase 5V motors

with rating greater than 75kVA, the following information shall be provided for each motor; (i) Rating in HP or KVA;(ii) Types of control equipment;(iii) Methods of starting and starting current;(iv) Frequency of starting (number/hour); and(v) Rated power factor;

(f) Voltage sensitive loads (indicating sensitivity)

Where a preliminary examination of the above data indicates that more detailed information is required, the consumer shall provide additional information upon request by TNB.


1.1.1.1TechnicalRequirementsForConnectionFor connections at Low Voltage the consumers installation shall comply with the Electricity Supply Act 1990

and any regulations made there underand Malaysian Wiring Regulations and any requirements specified by TNB based on Malaysian MS-IEC Standards.

In the case of connections to Consumers at Low Voltage, TNB has the responsibility to specify any technical requirements for the connection. This includes specification of technical requirements associated with loads

which may give rise to voltage fluctuations and harmonics.

1.1.2Suppliesat275kV,132kV,33kV,22kV,11kVand6.6kV

For supplies at voltages of 75kV, kV, kV, kV, kV and 6.6kV, the Consumershall provide comprehensive information on the loads and their characteristics including but not limited to the following:

a) For all types of loads:(i) Maximum Active Power consumption in kW; and(ii) Maximum Reactive Powerconsumption in kVAR.

b) For motor loads:(i) Types of control equipment;(ii) Methods of starting;(iii) Magnitude and duration of the starting current;(iv) Frequency of starting (number/hour);(v) Under voltage setting and time; (vi) Negative phase sequence protection; and(vii) Sub-transient and/or locked rotor reactance of the motor.

c) For nonlinear loads with harmonic current injections:(i) Harmonic current spectrum including harmonic number and the corresponding maximum

current.

d) For fluctuating loads:

(i) The rates of change of Active Power and Reactive Power consumption in kW/minute and kVAR/minute respectively, both increasing and decreasing;

(ii) The shortest repetitive time interval between fluctuations for Active Power and Reactive Power

in minutes; and(iii) The magnitude of the largest step changes in Active Power and Reactive Power in kW and

kVAR respectively, both increasing and decreasing.


5

e) For voltage sensitive loads: (i) steady-state voltage tolerance limits of the equipment in percentage of the nominal voltage;(ii) intrinsic immunity limits to short duration voltage variation;(iii) transient voltage tolerance limits of the equipment in percentage of the nominal voltage and the

corresponding duration;(iv) harmonic current emission limit for equipment.

f) For Shunt Connected Reactors and Capacitors: (i) configuration and sizes of individual banks; (ii) types of switching and control equipment; and(iii) types of harmonic filtering reactors.

Should a preliminary examination of the above data indicate that a more detailed information is required, the consumer shall provide the information upon request by TNB.

TNB upon receipt of the data and information should perform assessments of the impacts of the loads on TNBs distribution system. Consumers shall then be advised on TNBs design of supply scheme and other technical requirements to be complied with by the consumers to ensure system performance is within the limits or standard.

1.1.3SuppliesToEmbedded/DistributedGenerators

1.1.3.1 PlanningDataRequirementsForConnectionOfEmbedded/DistributedGeneratorsEmbedded / distributed generator installations are treated as a different consumer class. For the purposes of planningFor the purposes of planning the connection of a Distributed Generator to the Distribution System, TNB requires sufficient information to model the generating plant and carry out engineering studies for determining the method of connection to be employed, the voltage level of connection and its impacts on the Distribution System. The Distributed Generator shall provide the following information to TNB for planning purposes.

(a) For all Generating Units (i) Terminal voltage;(ii) Rated kVA;(iii) Rated kW;(iv) Maximum Reactive Power sent out or minimum lagging power factor;(v) Maximum Reactive Power absorbed or minimum leading power factor;(vi) Type of Generating Unit synchronous, asynchronous, etc.(vii) Type of prime mover;(viii) Type of voltage control;(ix) Generating Unit sub-transient reactance;(x) Generating Unit transformer details;(xi) Requirements for Top-Up Supply and/or Standby Supply.

5 5TENAGANASIONAL BERHAD

Should a preliminary examination of the above data indicate that more detailed information is required; the Distributed Generator shall provide additional information as follows upon request by TNB.

(b) For a Generating Unit with a capacity greater than MW, the following additional information shall be provided to TNB by the Distributed Generator:

(i) Generating Unit electric and mechanical data (all impedance (unsaturated) in p.u. of rating and time constants in seconds) Type of prime mover Rated MVA Rated MW Generating Unit rotor and turbine moment of inertia or inertia constant Generating Unit MW / MVAR capability chart\ Type of excitation system Stator resistance Direct-axis sub-transient reactance Direct-axis transient reactance Direct-axis synchronous reactance Quadrature-axis sub-transient reactance Quadrature-axis transient reactance Quadrature-axis synchronous reactance Direct-axis sub- transient open circuit time constant Direct-axis transient open circuit time constant Quadrature-axis sub-transient open circuit time constant Quadrature-axis transient open circuit time constant Zero sequence resistance Zero sequence reactance Negative sequence resistance Negative sequence reactance Generating Unit open circuit saturation curve

(ii) Generating Unit transformer data MVA rating % resistance % reactance Tap range in p.u. Tap step in p.u. Vector group Method of earthing


6 7

(iii) Automatic voltage regulator (AVR) data A block diagram for model of the AVR including the data in gains, forward and feedback gains,

time constant and voltage control limits and limit characteristics.

(iv) Speed governor and prime mover data A block diagram for the model of the generating unit speed governor including its control parameters, time constants, gains, valve limits, temperature controls, deadbands, turbine rating, maximum and minimum power, penstock parameters, tunnel parameter, surge chamber parameters and all other relevant data.

Should a preliminary examination of the above data indicate that more detailed information is required; the Distributed Generator shall provide additional information upon request by TNB.

(c) For Fixed Speed Asynchronous Induction Generating Units the following data may be required: Stator Current at unity power factor Stator Current max at lagging power factor Stator Current min at lagging power factor Magnetizing reactance Stator resistance Stator reactance Inner cage or running rotor resistance Inner cage or running rotor reactance Outer cage or standstill rotor resistance Outer cage or standstill rotor reactance For the above state whether derived from inner outer cage or running-standstill measurements Slip at rated output per unit Load torque-speed coefficient B Load torque-speed coefficient C Inertia constant for generator prime mover drive chain

Note:The torque-speed (T-N) relationship is defined as:

T = T0 (A + BN = CN2) where A = 1.0 B C

Therefore only B & C are needed.Alternatively a per unit torque-speed curve can be provided.

Describe method of adding star capacitance over the operating range

6 76 7TENAGANASIONAL BERHAD

Capacitance connected in parallel at % of rated output Starting0%0%60%80%00%

Maximum starting current in Amps Starting Regime - Symmetrical RMS current at time t from energisation:

- t = 0 ms- t = 50 ms- t = 00 ms- t = s- t = 5 s

The operating chart to show range of reactive import and export with compensation as a function of Active Power.

Details of the turbine and governor model, described in block diagram form showing transfer functions of individual elements

The Distributed Generator will need to provide the above characteristic for each asynchronous Generating Unit based on the number of pole sets (i.e. Two data sets are required for dual speed /6 pole machines).

For large sites, with multiple machines, the Distributed Generator may alternatively provide an equivalent network modelled as an asynchronous Generating Unit with matching Generating Unit Transformer at the Connection Point. This equivalent should also model the site electrical network and power factor correction, etc.

Should a preliminary examination of the above data indicate that more detailed information is required; the Distributed Generator shall provide additional information upon request by TNB.

1.1.3.2 Pre-ConnectionStudiesForEmbedded/DistributedGeneratorsThe following pre-connection studies are necessary for the purpose of designing the interconnection facilities for embedded / distributed generators:-

(i) System studies of embedded / distributed generator installation encompassing load flow, short-circuit,

stability, load rejection or islanding studies and protection coordination studies. The part of pre-connection studies is to be carried by a consultant appointed the owner of embedded / distributed generator. The associated costs shall be borne by the owner of embedded generator. The results of study will be presented to TNB for evaluation.


8 9

(ii) TNB upon receiving the above study and other necessary data shall conduct an integrated study of the interconnected systems. The scope of study will include load flow, short-circuit, stability and protection

coordination studies. The costs of this study will also be borne by the owner of generator seeking interconnection with the distribution system.

1.2OTHERINFORMATIONREQUIREMENTSOther sets of information as listed below are necessary for TNBD to plan for connection of supply to consumers.

. Site plan or location plan (see Appendix ) indicating the geographical position of the premises/buildings of consumers. This information is essential for TNB to locate TNBs infrastructure nearest to the prospective

consumers.

. Layout plan (see Appendix ) for developed/proposed development. This information is necessary for TNB to locate sub-station locations, if not previously identified, and feeder routes for MV or LV networks. Sketched layout

plans are required for individual or group applications less than 00KVA. Additional information, which needs to be specified in the supply application form, is the position of prospective consumer with respect to LV system or

sub-station in terms of distance and estimated number of spans of LV feeders.

. Building layout plans are particularly useful for indicating services entrance location/positions, position of sub-stations and consumer switch rooms.

. Sub-station layout plan for both sub-stations integrated into a building or in separate building.

5. Consumer switch room layout indicating location of main switchboard, service cable entry position and necessary ducting or trenching.

6. Wiring diagrams of installation to be approved and endorsed by Electrical Consultant Engineer for demand greater than 00kVA. The single line drawing of the installation must encompass the complete installations indicating incoming switches, main and sub-switchboards, main protection for incoming TNB supply as well as sub-circuit protection, metering schemes, conductor sizes, major equipment e.g motors etc., standby generators, capacitor banks. Ratings of switchgears and components must also be indicated.

7. Appendix is the form which registers the consent or acknowledgement of developer/owner for leasing/transfer of sub-station lot to TNB. This form is to be submitted by Electrical Consulting Engineers, acting on behalf of consumers, for projects requiring substations.

Appendix6 is a checklist for reference to consumers, electrical contractors and consultant engineers on range data or information required at the supply application processing stage.


SECTION2.0PLANNINGANDDESIGNCRITERIA

TNB in developing the connection system or supply infrastructure needs to satisfy a set of planning and design criteria which are described in this section.

2.1STEADY-STATESUPPLYVOLTAGEPERFORMANCE

(a) Steady-State Voltage Fluctuation under Normal Condition

Under normal condition, when all circuit elements are in service, the distribution network including the points before the consumer metering must be planned to be maintained as is table - below:-

Table 2-1: Steady -state voltage level fluctuation limits under normal conditions

(b) Steady-State Voltage Fluctuation under Contingency ConditionUnder contingency condition, when one or more circuit elements are on outage, the power frequency steady-state voltage at all points in the distributors distribution system including the points before the

consumer metering must be planned to be maintained as follows:

Table -: Steady-State Voltage Fluctuation Limits under Contingency Condition

2.2SUPPLYSECURITYLEVELSupply security of a distribution system network defines the availability of supply to consumers following the occurrence

of supply interruption. Systems and necessary network management infrastructure may be designed to meet any of the standardized security level definitions currently adopted by TNB as indicated in table 2-3.

Voltagelevel %variation5V and 0V -0% & +5%

6.6kV, kV, kV,kV +/- 5%

kV and 75kV -5% & +0%

Voltagelevel %variation5V and 0V +/- 0%

6.6kV, kV, kV,kV +0 & -0%

kV & 75kV +/- 0%


0

2.2.1 Adopted Security Level Definitions For TNB Distribution Systems

Table -: Security Levels for Distribution Network

2.2.2 SupplySecurityLeveltoConsumersFor supplies to consumers at voltage levels of 6.6kV, kV, kV and kV, large part of the network are generally designed to facilitate an average supply restoration of less than hours. For supplies at 0V and 5V, the restoration period may vary beyond hours depending on the type of network fault.

2.2.3 RequestforHigherSupplySecurityLevelHowever, TNB can design the supply scheme to meet higher security level requirement of individual consumer or group of consumers. All additional costs involved in providing the higher security level shall be borne by the consumer.

2.3 POWERQUALITY2.3.1 PowerQualityRequirements

... The electromagnetic disturbance covers the following phenomena:a. Voltage fluctuations and flickers

b. Harmonics up to order of 50th

c. Voltage dips and short supply interruptionsd. Voltage unbalancee. Inter-harmonics up to 50th f. Voltage distortions at higher frequencies (above 50th harmonics)g. Transient overvoltagesh. Power frequency variationi. Dc componentsj. Mains signaling

SecurityLevel AverageRestorationPeriod

Level Less than 5 seconds

Level Less than 5 minutes

Level Less than hours

Level Less than hours

0 0 TENAGANASIONAL BERHAD

For the purpose of thisguideline, Power Quality is defined as the degree to which the voltage at the point of connection to the consumer of the Distribution Network is maintained to be Sinusoidal at Rated Voltage Magnitude and Frequency. In this guideline only items a to d are considered.

2.3.1.2 This section specifies the Power Quality requirements of the electricity supply to be delivered to the consumers

in the TNB distribution system in terms of voltage and frequency to be within specific limits so that the consumer

s equipment directly connected to the TNB distribution system can operate safely within its design performance

without suffering undue damage or breakdown. Likewise this guidelines shall be complied with by all consumers connected and who intend to be connected to the TNB distribution system.

... In order to achieve the required Power Quality, these guidelines will be used by TNB in planning, developing, maintaining and operating the distribution system and in connecting Distributed Generation and Demand to the distribution system.

... In cases where, the nature and operation of the new types of plant and equipment to be connected to the distribution system is perceived to be likely to cause problems to customers connected to the System, but not fully covered by this guidelines, expert advice will be sought to ensure the appropriate remedial measures are put in place.

2.3.2 Scope

... This guidelines covers most of the power quality related phenomena generated by various types of plant and equipment connected to the distribution system as well as those generated by the transmission system. In each particular case the Distribution Power Quality that should be maintained is indicated together with the remedial approach and responsibilities of parties.

2.3.3 VoltageDips/Sags

2.3.3.1 This guidelines does not specifically cover the requirements for transient phenomena which can affect the

voltage level known as voltage dip or sag and swell usually experienced during system faults and the subsequent recovery period, which can adversely affect some customer equipment sensitive to such changes. Currently, there is no local or international guidelines that has been established to specify requirements of the supply voltage to the consumers with respect to the magnitude and duration of voltage dips and swells.


... Guidelines and guides that exist with respect to voltage dips and swell are those that describe the environment in which the sensitive voltage equipment may experience which include typical number of voltage sag experiences and their duration. The main purpose of such guidelines is to ensure that equipment designed to be connected to the distribution systems to be compatible with the supply voltage performance in terms of various power quality problems including voltage sags.

... Malaysian Standard MS 760:00 Guides on Voltage Dips and Short Interruptions on Public Electric PowerMalaysian Standard MS 760:00 Guides on Voltage Dips and Short Interruptions on Public Electric Power Supply Systems contains definitions and descriptions of voltage sags and short interruptions. MS1760:2004 is

based on IEC 6000--8 with some limited data on the characteristics for Malaysia. The purpose of the Guides is to discuss voltage dips and short interruptions primarily as phenomena observed on public supply systems and its effects on voltage sensitive equipment receiving supply from such systems.

2.3.3.4 There exist standards on immunity of equipment to supply voltage fluctuations and distortion with defined

magnitude and duration of voltage dips and harmonics. IEC 6000- series of guidelines set out the supply characteristics e.g. IEC 6000-.8 as indicated above. IEC 6000- series of guidelines sets out the compatibility levels which should be achieved when designing electrical equipment which may give rise to voltage fluctuations

and harmonic distortion and when connecting such equipment to the distribution system, which will give immunity to interference to similar equipment connected to the distribution system. MS IEC 6000-- & MS IEC 61000-4-34 series of standards specifies test methods.

...5 Some equipment suppliers and trade organisations also specify the immunity levels for certain types of equipment for example Semiconductor Industry Guidelines SEMI F7, Computer and Business Equipment Manufacturing Association CBEMA Compatibility Guidelines.

...6 TNB shall upon request from any customer advise the consumer having connected voltage sensitive loads or intending to connect voltage sensitive loads in their installation to take into account the short duration electromagnetic disturbance phenomena for selecting equipment with proper maximum intrinsic immunity.

2.3.4 VoltageStepChange

... Limits of voltage changes due to Load, frequent and infrequent operational switching of Load both by TNB and the consumer are defined table 2.3.4.1. These limits are based on UKs Engineering Recommendation P2 ontable 2.3.4.1. These limits are based on UKs Engineering Recommendation P2 on

Planning Limits for Voltage Fluctuations Caused by Industrial, Commercial and Domestic Equipment in the United Kingdom, 989.


Table ...: Voltage limits on switching of load

2.3.5 VoltageFluctuationsandFlicker

..5. The limits of Flicker The limits of Flicker that are acceptable on the distribution system are in accordance with the Engineering Recommendation P8, Issued by The Electricity Council of UK in 989 entitled Planning Limits for Voltage Fluctuation Caused by Industrial, Commercial and Domestic Equipment in the United Kingdom. TNB uses the procedures contained in this document to plan the connection of Fluctuating Loads and applies the limits therein in measuring and monitoring the levels of Flicker at such points of connection.

2.3.5.2 In accordance with the Engineering Recommendation P2, voltage fluctuations at a Point of Common.2 In accordance with the Engineering Recommendation P2, voltage fluctuations at a Point of Common

Coupling with a fluctuating Load directly connected to the Distribution System shall not exceed:

(a) % of the voltage level for step changes, which may occur repetitively. Any large voltage excursions other than step changes or less frequent step changes may be allowed up to a level of % provided that this does not constitute a risk to the distribution system or, in TNBs view, any other party connected to theTNBs view, any other party connected to the view, any other party connected to the distribution system.

(b) The planning limits for the Short and Long Term Flicker Severity applicable for Fluctuating Loads connected to the distribution system are as set out in the table below.

LoadStarting/Switching LimitofVoltageChange

Starting/switching once or twice a year 6%

Infrequent single starting/switching or disconnection of Load once in two hours or more hours. Including capacitor or reactor bank

%

Frequent starting/switching and/or disconnection of Load (e.g., Many times in a day)

%


5

Table 2.3.5.2 : Maximum allowable flicker severity

..5. In connecting a Fluctuating Load at a particular point or Point of Common Coupling it is necessary to assess the total Flicker due to the Fluctuating Load itself and the background Flicker measured at that point. In assessing the total Flicker TNB shall use the so called RSS Rule. This assessment is carried out by the RSS Rule by obtaining the sum of the squares of the Flicker from the Fluctuating Load and the background Flicker, with the square root of this sum yielding the total assessed Flicker at that Point of Common Coupling due to the specific Fluctuating Load and the background Flicker at that point.

..5. Connection of more than one Fluctuating Load at the same Point of Common Coupling or addition of further Fluctuating Load at the same location is carried out on a first come first served basis on the distribution system.

This means that whilst the first Fluctuating Load may be within the allowable Flicker limits and not require any Flicker mitigation or compensation equipment, the second Fluctuating Load which may cause violation of Flicker limits will be obliged to invest in appropriate Flicker mitigation or compensation equipment. At the planning stage, in carrying out the assessment of the total Flicker due to more than one Fluctuating Load connecting at a particular Points of Common Coupling, TNB shall use the methodology described in P8.

..5.5 In assessing the level of Flicker due to a Fluctuating Load at the planning stage the assessment will be carried out at a realistic System operating condition giving the minimum number of connections with which that point on the System can be operated within normal voltage limits and following Secured Contingency Events. This condition shall be considered as representative of the type of System conditions under which the Flicker due to a Fluctuating Load will be at its highest value as the voltage fluctuations due to the Fluctuating Load will be at

their highest level under such conditions.

TNBdistributionsystemVoltageLevelatwhichthe

FluctuatingLoadisConnected

AbsoluteShortTermFlickerSeverity(Pst)

AbsoluteLongTermFlickerSeverity(Plt)

500, 75 and kV .0 0.8

Less than kV 0.8 0.6


..5.6 If under the operating conditions described in ..5.5 the Flicker due to a Fluctuating Load exceeds the limits then Flicker compensation, which will reduce the Flicker to an acceptable level shall be installed. For the avoidance of doubt the acceptance Criteria for Flicker is the 95% values of Short and Long Term Flicker Severity i.e., Pst and Plt will be below the limits specified in table 2.3.5.2. Here the 95% values mean the values of Flicker Severity measured and observed during 95% of the total observation period. The System overall performance yardstick for the level of Flicker reduction to be achieved shall be based upon enabling connection of other similar Fluctuating Load and/or permitting for future extension and development of the location with further Fluctuating Load installations. The Flicker compensation method and equipment to be used shall be of a type that does not cause resonance problems with the existing and intended future developments of the distribution system.

..5.7 If the permissible Flicker limits cannot be met even with installation of Flicker compensation at a particular Points of Common Coupling at a particular System voltage level then connection of the Fluctuating Load at a higher voltage level or elsewhere in the System shall be considered. The connection point of choice will need to have to experience lower voltage fluctuations than the first connection point considered under the operational

conditions in ..5.5.

2.3.6 Harmonics

..6. All plant and equipment connected to the Distribution System, and that part of the TNB distribution system at each connection site, should be capable of withstanding the following distortions of the voltage waveform in respect of harmonic content. The maximum total levels of Harmonic Distortion at any connection point on the distribution system from all sources under both planned outage and Secured Contingency Event conditions, unless abnormal conditions prevail, shall not exceed:

(a) at kV and kV, a Total Harmonic Distortion of % with no individual harmonic voltage greater than that shown in the tables X;

(b) at kV and 6.6kV, a Total Harmonic Distortion of % with no individual harmonic voltage greater than that shown in the tables Y;

(c) at 5V and below, a Total Harmonic Distortion of 5% with no individual harmonic voltage greater than that shown in the tables Z;

(d) infrequent short duration peaks may be permitted by TNB to exceed the above levels for harmonicTNB to exceed the above levels for harmonic to exceed the above levels for harmonic distortion;


6 7

..6. A Consumer who intends to connect non-linear loads to the TNB system shall carry out assessment harmonic. A Consumer who intends to connect non-linear loads to the TNB system shall carry out assessment harmonicassessment harmonic distortion levels for the connection of each non-linear Load to the Distribution System. TNB will verify the results of the assessments.

..6. Consumers shall ensure that the Immunity Level of their plant and Apparatus is compatible with the. Consumers shall ensure that the Immunity Level of their plant and Apparatus is compatible with the electromagnetic disturbances present on the System including harmonics.

..6. In assessing the level of harmonic distortion and individual harmonic levels at the planning stage, the assessment. In assessing the level of harmonic distortion and individual harmonic levels at the planning stage, the assessment will be carried out at a realistic system operating condition giving the minimum number of connections with which that point on the system can be operated within normal voltage limits and following secured contingency events. This condition shall be considered as representative of the type of system conditions under which the harmonic distortion and individual harmonic levels will be at their highest level.

..6.5 If under the operating conditions describes in ..6. (a) the harmonic distortion and individual harmonic levels.5 If under the operating conditions describes in ..6. (a) the harmonic distortion and individual harmonic levels due to the load exceed the limits then harmonic filters which will reduce the harmonics to an acceptable level

shall be installed to bring the levels within limits. The system overall performance yardstick for the level of harmonic reduction to be achieved shall be based upon enabling connection of other similar harmonic producing load and/or permitting for future extension and development of the location with further harmonic producing load installations.

..6.6 The planning limits of harmonics that are acceptable of the distribution system are in accordance with MS.6 The planning limits of harmonics that are acceptable of the distribution system are in accordance with MS IEC 6000--6 Assessment of emission limits for distorting loads in MV & HV power systems, and where appropriate Engineering Recommendations G5/ is adopted.

..6.7 TNB uses the procedures contained in this document to plan the connection of loads producing harmonics and.7 TNB uses the procedures contained in this document to plan the connection of loads producing harmonics and applies the limits therein in measuring and monitoring the levels of harmonics at such points of connection. These are given in summary in the tables below.


Table X: Planning Levels for Harmonic Voltages in TNB distribution systems >0kV to 5kV (kV and kV) including background harmonics

Values in brackets are the Engineering Recommendation G5/ levels.

Table Y: Planning Levels for Harmonic Voltages in TNB distribution systems 6.6kV and kV including background harmonics

Values in brackets are the Engineering Recommendation G5/ levels.

OddHarmonics(Non-multipleof3)

OddHarmonics(Multipleof3) EvenHarmonics

Orderh

HarmonicVoltage(%)

Orderh

HarmonicVoltage(%)

Orderh

HarmonicVoltage(%)

57795

>5

5.0 (.0).0 (.0).0 (.5).5 (.5).6 (.0). (.0). (0.7). (0.7)

0.+0.5(5/h)

95

>

.0 (.0). (.0)

0.0.0.

680

>

.6 (.0).0 (0.8)

0.50.0.0.0.

The total harmonic distortion level is 6.5 % (%)


OddHarmonics(Multipleof3)

EvenHarmonics

Orderh

HarmonicVoltage(%)

Orderh

HarmonicVoltage(%)

Orderh

HarmonicVoltage(%)

57795

>5

5.0 (.0).0 (.0).0 (.0).5 (.0)

.6..

. (0.7)0.+0.5(5/h)

95

>

.0 (.0).0.0.0.

680

>

.6 (.5).00.50.0.0.0.

The total voltage harmonic distortion level is 6.5 % (%)


8 9

Table Z: Planning Levels for Harmonic Voltages in TNB distribution systems 5V and below including background harmonics

Note: The above table shows the Engineering Recommendation G5/ levels. TNB is in the process of adopting IEC levels and the values in the above table will be updated later

2.3.7 VoltageUnbalance..7. All plant and equipment connected to the distribution system, and that part of the distribution system at each

connection site, should be capable of withstanding the following distortions of the voltage waveform in respect of Voltage Unbalance at the planning stage.

) Under planned outage conditions, the maximum negative phase sequence component of the phase voltage on the distribution systemshould remain below % unless abnormal conditions prevail.

) Under the planned outage conditions, infrequent short duration peaks with a maximum value of % are permitted for Voltage Unbalance, subject to the prior agreement of TNB under the connection agreement.TNB under the connection agreement. under the connection agreement. TNB will only agree following a specific assessment of the impact of these levels on TNB and other will only agree following a specific assessment of the impact of these levels on TNB and otherTNB and other and other Customers plant and equipment with which it is satisfied.


OddHarmonics(Multipleof3)

EvenHarmonics

Orderh

HarmonicVoltage(%)

Orderh

HarmonicVoltage(%)

Orderh

HarmonicVoltage(%)

57795

>5

.0.0.0.5.6..0.7

0.+0.5(5/h)

95

>

.0.0.0.0.

680

>

.6.00.50.0.0.0.

The total voltage harmonic distortion level is 5%


3) At the terminals of a Customers installation or specific Load the Voltage Unbalance voltage shall not

exceed % for 5 occasions within any 0 minute time period.

) In terms of traction Loads connected to the distribution system the acceptable limits of Voltage Unbalance are in accordance with Engineering Recommendation (E/R) P9, issued by the Electricity Council of UK in 98 entitled AC Traction Supplies to British Rail and its successor document P 9 issued in 990 Planning Limits for Voltage Unbalance in the United Kingdom. TNB uses the procedures contained in this document to plan the connection of Loads producing Voltage Unbalance and applies the limits therein in measuring and monitoring the levels of unbalance at such points of connection.

..7. In assessing level of Voltage Unbalance at the planning stage the assessment will be carried out at a realistic System operating condition giving the minimum number of connections with which that point on the System can be operated within normal voltage limits with maintenance outages and following Secured Contingency Events. This condition shall be considered as representative of the type of System conditions under which the Voltage Unbalance will be at its highest value.

..7. If under the operating conditions described earlier the Voltage Unbalance due to the Load exceeds the limits then balancing compensation equipment, which will reduce the unbalance to an acceptable level shall be installed to bring the levels within the limits. The System overall performance yardstick for the level of unbalance reduction to be achieved shall be based upon enabling connection of other similar unbalance producing Load and/or permitting for future extension and development of the location with further unbalance producing Load installations. The balancing compensation equipment to be installed shall be of a type that does not cause resonance problems with the existing and intended future developments of the distribution system.

2.4SHORT-CIRCUITLEVELS

TNB network are design and operated in order to remain within the limits of short-circuit levels as in Table -. TNB equipment design are specified to the same S.C rating. Consumer equipment at the point of interface or part of the

interconnection design shall also the minimum S.C rating. TNB may provide indicative or prospective fault level in terms of X/R ratio at the interface point with consumer, if so required for detailed installation design. Values in table - gives the maximum short-circuit level at the various voltage levels.


0

Table -: Short-circuit levels for various voltage levels

2.5PROTECTIONREQUIREMENTS

2.5.1BasicRequirements

In all cases, the basic requirement is that the consumers arrangements for protection at the connection point, including

types of equipment and protection settings, must be compatible with standard practices on the TNBs system, and be as

TNB specifies during the application for supply process. This is especially critical for MV and HV consumers.

2.5.2 Specific Requirements

Consumers shall take into consideration the following specific protection practices of TNB in designing their

installation:

(a) Maximum clearance times (from fault current inception to fault clearing) must be within the limits established TNB in their short circuit rating policy for the distribution system.

(b) Auto-reclosing or sequential switching features may be used on TNBs distribution system. TNB will provide

details on the operating sequence utilised for the supplies on the proposed installation so the consumer can plan for this in the design and protection of his facility.

(c) On some of TNBs distribution systems, certain types of faults may cause disconnection of one phase only of a

three-phase supply.

SupplyVoltageLevel S.CRating

75kV 0 kA for s

kV .5 kA for s

kV 5 kA for s

kV & kV 0 kA for s

6.6 kV 0 kA for s

5V & 0V .5 kA for s

0 0 TENAGANASIONAL BERHAD

2.5.3ProtectionSystemEvaluationProcess

Consumers installation to supplied at 11kV and above shall provide the appropriate and matching protection scheme

to support the desired operation of the designed supply scheme. The reliability of the equipment, protective devices and protection systems being deployed at the consumer connection or interface points may effect the reliability of TNBs

supply system.

Fig - Protection System Evaluation Process

Figure - above illustrates the steps involved in the evaluation of protection schemes.

Submission of device specifications & test results Submission of device specifications & test results

Submission of schematic of installation indicating proposed protection schemes for incoming points

Submission of schematic of installation indicating proposed protection schemes for incoming points

Submission of Protection Coordination Studies of internal installation & proposed setting

Submission of Protection Coordination Studies of internal installation & proposed setting Review of installations protection

scheme and design of supply scheme to consumer

Review of installations protection scheme and design of supply scheme to consumer

TNB performed integrated protection coordination studies & confirm setting

TNB performed integrated protection coordination studies & confirm setting

Consumer advised on required changes to match planned supply schemesConsumer advised on required changes to match planned supply schemes

Witness testing and verification at site before commissioningWitness testing and verification at site before commissioning


SECTION3.0:DEMANDESTIMATION

Supply schemes and networks are to be adequately de

TNB Electricity Supply Application Handbook ESAH

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