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Electricity Supply Application Handbook
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Electricity Supply Application Handbook
Tenaga Nasional Berhad would like to acknowledge those that have actively contributed towards this effort in revisiting the TNB’s Electricity Supply Application Handbook initially launched in 2001 and its subsequent Second (2nd) Edition in 2007.
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 Third (3rd) 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), The Institution of Engineers, Malaysia (IEM), Masters Builders Association of Malaysia (MBAM), The Cement & Concrete Association of Malaysia (C&CA), Suruhanjaya Tenaga, Kementerian Tenaga, Teknologi Hijau dan Air (KETTHA), Kementerian Perumahan dan Kerajaan Tempatan (KPKT), Kementerian Kemajuan Luar Bandar dan Wilayah (KKLW)
dan Jabatan Kerja Raya (JKR) for their comments and all others that have contributed in more ways than one to the publication of the 3rd Edition of the Electricity Supply Application Handbook.
Electricity Supply Application Handbook
ELECTRICITY SUPPLY APPLICATION HANDBOOK
TENAGA NASIONAL BERHAD ELECTRICITY SYSTEM
The Tenaga Nasional Berhad (TNB), a public listed company registered under Companies Act 1965, 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 are consumer service centres, call management centres, substations and administrative offices throughout Peninsular Malaysia - Tenaga nasional berhad introduction. TNB’s core activities are in generation, transmission and distribution of electricity which are being handled by 3 Divisions :
Distribution Division supplies electricity in strict accordance with the provisions of the TNB Licence, Electricity Supply Act 1990, the Licensee Supply Regulations 1990 and the Electricity Regulations 1994 (and all amendments thereto). Distribution Division is divided into 2 main regional operational areas where operational efficiency is further enhanced through the creation of 2 main regional areas, headed by the respective Senior General Managers which covers :
Selangor, Wilayah Persekutuan, Putrajaya/Cyberjaya,
Negeri Sembilan, Melaka and Johor
Perlis, Kedah, Pulau Pinang, Perak,
Pahang, Terengganu and Kelantan
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 and Small Branch Managers. All district offices (areas and branches) have one or more Pusat Khidmat Pelanggan under their jurisdiction.
Pusat Khidmat Pelanggan provides functions pertaining to Application for Electricity 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 electricity supply to the Consumer. The support departments at the Distribution
headquarters include Finance, Asset
Management, Human Resource Management, Materials Management, Metering Services, Revenue Maximisation, Strategic Management and Organisational Development and Consumer Services and Marketing.
Pusat Khidmat Pelanggan
Pusat Khidmat Pelanggan is TNB’s Service and Advisory Centre. It provides TNB’s consumers with Consumer Service. There are numerous Pusat Khidmat Pelanggan centres throughout Peninsular Malaysia at your service. For complete information on Pusat Khidmat Pelanggan centres throughout Peninsular Malaysia can be obtain via TNB website (www.tnb.com.my). This list is subject to changes and may be reviewed from time to time. Pusat Khidmat Pelanggan is where TNB as a caring and friendly utility touches base with its consumers. At Pusat Khidmat Pelanggan, you may experience directly our value-added services which we have specially made available to you, our valued consumers. Services provided at Pusat Khidmat Pelanggan include:
One stop payment counter for all electricity and other utility bills.
Payment can be made by cash, cheque, credit card or debit card.
You can also make arrangements to have your electricity bills paid through banks or ATM cards.
TNB, being a caring company, shall facilitate and make special arrangement on case to case basis for the payment of bills for elderly and handicapped consumers.
Electricity supply application
At Pusat Khidmat Pelanggan, we offer you advice on all matters pertaining to your electricity supply application.
For wiring purposes in your premise, you may choose from a varied selection of contractors from our directory of registered electrical contractors.
Inquiries pertaining to billing and other related services.
Pusat Khidmat Pelanggan shall provide clarification on any billing inquiries and it related services to consumers.
Appointments can be made to have the meter read in case the premises are locked during working hours.
Testing of meters can be carried out if consumers suspect that the meter is faulty. Consumers are required to submit written application for meter to be tested. A fee will be charge for such testing.
The transmission voltage networks are 500kV, 275kV and 132kV, whilst the distribution voltages are 33kV, 11kV and 400/230 Volts. However, in the case of certain parts of Johor & Perak the distribution voltages may include 22kV and 6.6kV.
The supply frequency is 50Hz 1%.
Consumers are required to maintain their load power factor to a minimum of 0.85 for voltage level less than 132kV and 0.90 for voltage level 132kV and above.
Medium Voltage (6.6 kV up to 33kV) and High Voltage (66kV and above)
3 phase configuration
solidly earthed or impedance earthed
overhead lines and underground cable are used extensively for medium and high voltage
Low Voltage 400/230V
3 phase 4 wire system
neutral point solidly earthed mixture of overhead lines, underground cables and aerial insulated cables
Short Circuit Ratings
All equipment proposed to be installed and connected to TNB supply must comply with the following short circuit ratings:
Short circuit rating
50 kA, 1s
40 kA, 3s
(50kA , 1s for substation adjacent to Power
Station, or within 500kV substation)
31.5 kA, 3s
(40kA, 3s for substation adjacent to Power
Station, or within 500/275kV substation)
25 kA, 3s
20 kA, 3s
20 kA, 3s
20 kA, 3s
31.5 kA, 3s
Act, Regulation and Customer Charter
The electricity supply and installation practice in Peninsular Malaysia are governed by the following :1
Electricity Supply Act 1990 – Act 447
Licensee Supply Regulations 1990
Electricity Regulations 1994
Customer Charter – refer to TNB website (www.tnb.com.my)
Supply Voltage Options
Supply may be provided at any of the declared voltages :275 kV, 132kV, 33kV, 22 kV*, 11kV, 6.6 kV* and 400/230V. Generally, supplies to domestic premises are given at single phase 2-wire or three phase 4-wire while for non domestic premises the supply are at three phase 3-wire or three phase 4-wire. However, the actual supply voltage provided depends on the individual applicant’s load requirements (refer to Connection Guideline clause 3.1 – Maximum Demand levels and supply scheme) :It should be noted that voltages other than the above classifications is not provided by TNB. However, consumers can make their own transformation arrangements where necessary. System for certain parts of Johor and Perak only.
Types of Supply
Supply Application Based on Load
All new applications and upgrade of supply requirement can be classified into two (2) types of supply applications.
Supply Application For Load Up To 100 KVA
Supply from existing supply mains or establishment of new supply system (subject to system capability)
Submission of applications to TNB by Electrical Contractor registered with the Energy Commission
Supply Application For Load Exceeding 100 KVA
Supply from existing supply mains or establishment of new supply system Submission of applications to TNB by Electrical Consultant Engineer registered with the Board of Engineers Malaysia
Note: Establishment of new supply system may require the construction of a new sub station/substations and its related ancillaries.
Supply Application for Streetlight can be categorize as follows based on TNB’s prevailing policies and guidelines:
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.
Consumers Standby Supply
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 TNB’s supply source through a suitable, approved changeover facility. The Energy Commission and other relevant authorities govern the usage of generators and standby supply.
Alternative Source of Supply
A large consumer may require an alternative source of supply. TNB will provide such alternative supply at an additional cost fully borne by the consumer.
Provision Of Temporary Supply
Application for a Temporary Supply means the electricity supply required is for a nonpermanent installation intended for a limited time. When a consumer is requesting for a permanent supply, but a planned supply source is not available at that point of time and temporary connection from another source of supply is constructed, the case is not considered as a Temporary Supply.
Examples of Temporary Supply are, but not limited to, festivals or exhibition sites, circuses and construction sites (inclusive of the worker’s quarters). Tariff for Temporary Supply shall be determined based on the usage of the Temporary Supply premise. For example, Tariff A is for the worker’s quarters on construction site, Tariff B, C1 or C2 for construction site, festivals, exhibitions or circuses. A surcharge of 33% of the total bill, shall be charged monthly through out the Temporary Supply term.
The consumer is responsible to construct the respective infrastructure and TNB shall charge the cost of connection and termination of cables. However in isolated cases where the consumer does not have the ability and resources to construct the infrastructure, TNB may provide such service and hence the Connection Charge shall be revised accordingly to include the overall cost of constructing and dismantling. The Connection Charge monies however shall be refunded based on the net book value amount of the returned installations after the Temporary Supply has been dismantled.
Single Tenant Premises
If the supply is for a single tenant only then the entire supply will be metered at the applicant’s incoming switchboard. The consumption will be charged at the appropriate tariff rates.
Multi Tenanted Premises
(a) Commercial Premises (excluding shoplots)
Multi tenanted commercial premises except shop lots shall be given bulk supply. It shall be the responsibility of the owner / developer of the multi tenanted commercial premises to obtain independent distribution license from Energy Commission.
(b) Domestic Premises
Multi tenanted domestic premises, the owner / developer / Joint Management Committee shall have the option of taking supply via bulk supply or individual supply to landlord and tenants. If on bulk supply it shall be the responsibility of the owner / developer of the multi tenanted commercial
premises to obtain independent distribution license from Energy Commission. (c) Shop Lots
Shop lots shall be given individual supply.
The design, installation and operating of such electrical systems shall comply with requirements of all the relevant authorities including the Energy Commission’s and TNB’s.
In certain cases, the applicant may apply to undertake the planning and installation of the electrical systems (including overhead lines, switchgears, cables, according to TNB’s 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. TNB shall have the absolute discretion in deciding whether the turnkey project to be carried out by the applicant.
Please refer to the Statement of Connection Charges booklet available at Pusat Khidmat Pelanggan. The booklet is subjected to change as may be published from time to time.
Please refer to the Tariff booklet available at the Pusat Khidmat Pelanggan or at TNB’s website (www.tnb.com.my). Tariffs are subjected to change as may be published from time to time and approved by the Minister of Energy, Green Technology and Water.
Request For Additional Requirement Or Special Features
The applicant shall bear the full cost for any request of additional requirements or special features made by the applicant and/or impose by Local Authority. Please refer to the Statement of Connection Charges booklet available at the Pusat Khidmat Pelanggan. The booklet is subject to change as may be published from time to time.
Service Level Agreement (SLA)
SLA With Housing Developers
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 1966). 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.
ELECTRICITY SUPPLY APPLICATION FOR LOAD UP TO 100
The application for the supply of electricity with load up to 100KVA which is for a single (1) phase and three (3) phase low voltage system is outlined here.
What The Applicant Should Do
The applicant should take the following steps to apply for supply of electricity up to 100KVA for a single (1) phase and three (3) phase low voltage system. Steps
Appoint an Electrical Contractor who will act on
their behalf and submit the electricity supply
application for the applicant using the Electricity
Supply Application Form available at Pusat Khidmat
Settle connection charges billed by TNB (notice of
connection charges) through the Electrical
Contractor in order for TNB to start electricity
After completion of TNB’s electricity infrastructure
works (before installation of meter), the applicant
Deposit a sum of money equivalent to 2 months
bill (as reviewed from time to time) upon
receiving the notice of deposit. For deposit of
more than RM2,000, the applicant are
encourage to settle via Bank Guarantee.
Arrange appointment for meter installation with
Sign electricity supply contract with TNB
through the appointed Electrical Contractor
Visit our web page:
The Electrical Contractor must
be registered with the Energy
What The Electrical Contractor Should Do
The Electrical Contractor appointed by the applicant should take the following action: Steps
Submit electricity supply application for the applicant using the Electricity Supply Application Form available at Pusat
Khidmat Pelanggan. All information in the Electricity Supply Application Form must be completed.
Appendix 1 –
All documents in checklist must be completed, duly endorsed
by the appropriate competent person(s) of the appropriate
category and attached with the application.
Settle connection charges after TNB has :
Validated all information required as stated in Electricity Supply Application Form including any further
information submitted as required by TNB and
compliance to checklist
conducted analysis of electricity supply connection
confirmed the layout and schematic diagram including
meter location with Electrical Contractor
computed connection charges and issuance of notice of
connection charges to Electrical Contractor
After TNB has implemented electricity infrastructure works
on site, the Electrical Contractor shall:
Submit G and H form certifying the internal installations have been tested
Arrange for applicant to sign electricity supply contract with TNB
TNB Supply Lead Time
The flowchart for the electricity supply application process is as outlined in Appendix 2. TNB supply lead-time will be based on TNB’s Customer Charter.
Dispute Between Applicant And The Electrical Contractor
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.
ELECTRICITY SUPPLY APPLICATION FOR LOAD
EXCEEDING 100 KVA
The application for the supply of electricity for load exceeding 100KVA is outlined here.
The application process incorporates not only TNB requirements but taking into account the Government Development Plan Approval Process in Peninsular Malaysia issued by the Bahagian Perancangan Dasar & Pembangunan Kementerian Perumahan dan Kerajaan Tempatan.
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 Division’s 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 2 years after the approval from the relevant Local Authority.
There are two parts to the application:
Authorities Approval Process
TNB Application Process (Technical & Financial
Approval (After completion of Part A)
PART A :
Authorities Approval Process
The part A process approval that involves TNB’s technical comments is as shown in Development Plan Approval Process Flowchart in Appendix 3. At each application process, TNB requires a processing time of up to 7 days to complete the comments for the relevant Local Authority. The main process can be summarised as follows:
Submission Development Plan
The Developer / Owner / Consultant Engineer submit development plan application for the proposed development to Local Authority / One Stop Centre (OSC). All plans must be prepared by the party authorised by Local Authority. Applicant must adhere to the requirements stipulated in the Development Plan Checklist (checklist available in http://jky.kpkt.gov.my) during the submission of Development Plan to Local Authority / One Stop Centre (OSC). The comments from all relevant technical agencies including
TNB are required prior to approval by Local Authority / One Stop Centre.
TNB Register Application
The local authority / One Stop Centre submits application to TNB complete with required details as in Development Plan Checklist TNB will:
Acknowledge receipt and register development order plan in Development Order Comment Book.
Study the proposal. Match the existing system network and determine method of electricity supply.
Mutual Understanding Of Plan
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, etc.
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.
TNB Submit Comments to Local Authority / One Stop Centre
TNB submit to Local Authority / One Stop Centre the proposed development plans including all technical comments using TNB official stamp as required by Local Authority.
Local Authority approves the proposed development plan. The validity is subjected to:
– confirmation of layout details and pre-computation plans
– no changes in development
– 2 years extension or subject to respective Local Authority Development Order Plan validity requirement
TNB Application for Electricity Supply above 100KVA process starts (Part B)
PART B : TNB Application Process (Technical & Financial Approval) Part B process is the TNB Application Process for Electricity Supply above 100 KVA as outlined in Appendix 4. The process starts after the completion of Part A (Authorities Approval Process). The Process in Part B can be summarised as follows: Stage
The Electrical Consultant Engineer (registered with Board of Engineers Malaysia) on behalf of the developer/consumer submits application for the Electricity Supply Application to the nearest Pusat Khidmat Pelanggan using the reference of the approved Development Order Plan. Complete details as in Appendix 5 must be submitted with the application.
TNB will issue an acknowledgement letter to the Electrical Consultant Engineer. Documentation Check And System Study
TNB will check on the documentation and carry out system studies and shall advise on the necessary amendments (if any) to the consultant by letter. The Electrical Consultant Engineer is to ensure that all the amendments are done and resubmitted to TNB. Joint Meeting
TNB will restudy the amendments and arrange for a joint meeting with the Electrical Consultant Engineer and Applicant for final acceptance of the technical requirements including substation details, cable/overhead line route, metering system requirements and meter location. Activities of both parties will be recorded in the Joint Meeting Action Log. TNB shall forward in writing the final proposal on the above agreed technical requirements to the Electrical Consultant/Applicant. Electrical Consultant on behalf of the Applicant shall in writing confirm acceptance of the final proposal to TNB.
TNB will issue a Notice of Connection Charges to the Electrical Consultant Engineer based on the accepted final proposal.. The Electrical Consultant / Applicant shall make the payments for the Connection Charge. Relevant documents (such as Form A (Borang hal tanah)etc.) related to substation site to be submitted during the payment of Connection Charge.
Electricity Infrastructure Agreement (Optional)
The applicant / TNB may decide to enter into an Electricity Infrastructure Agreement (mainly for large development) with regard to scope of work, charges, timely connection and their respective obligations.
Discussion And Preparation Of Site Work
After payment of Connection Charges, the Electrical Consultant Engineer will arrange for pre start work discussion.
Construction Completion And Substation Energising
The substation site and the construction of the substation building shall be
completed (in accordance to TNB specification and requirement) and hand over to TNB. TNB will install the electrical equipment including its ancillaries and shall be responsible for the commissioning of substation. The energising of supply by TNB will normally be done at the same time as the installation of the meters. For HV / MV supply, the supply shall be energised in the presence of the Electrical Testing Engineer and for LV consumers in the presence of the Electrical Contractor.
Supply Application By The Electrical Contractor
The Electrical Consultant Engineer shall advise the Electrical Contractor (Appointed by the Applicant) to submit supply application for load requirement up to 100kVA, normally for individual applicant after payment of connection charges. The process is similar as outline in Section 2.
What The Applicant Should Do
The Applicant should take the following action in applying for electricity supply application for load exceeding 100KVA.
Appoint one (1) Electrical Consultant Engineer for each
electricity supply application
Submit an appointment letter of the Electrical Consultant Engineer allowing him to act on behalf of the applicant to
After approval from Local Authority / One Stop Centre and
TNB completion of work plan, the applicant settles
Connection Charges to TNB at any Pusat Khidmat Pelanggan.
The Applicant may decide to enter into an Electricity
Infrastructure Agreement with TNB with regard to scope of
work, charges, timely connection and their respective
Provide the substation(s) land and building(s) to TNB by: – Transfer the substation land at a nominal value of
RM10.00 to TNB or;
– Leasing the substation land at a nominal value of
RM10.00 to TNB.
The Certificate of Completion and Compliance (CCC) of
the substation building/compartment shall be handed to
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 (12) 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.
Appendix 6 –
Applicants are required to:
Deposit a sum of money equivalent to 2 months bill (as
reviewed from time to time) upon receiving the notice of
deposit. For deposit of more than RM2,000, the applicant
are encourage to settle via Bank Guarantee.
Sign electricity supply contract with TNB through the
appointed Electrical Contractor.
Supply Project Lead Time
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 from the Local Authorities.
Applicants should submit their applications for supply as early as possible giving the necessary information of their requirements to the nearest Pusat Khidmat Pelanggan. They must also inform TNB of the progress of their project(s). The above measures are necessary to ensure that TNB’s 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:
Supply Project Typical Lead Time *
132 kV and above
3 years – 5 years
18 months – 2 years
6 months – 12 months
400 V and below (with
3 months – 12 months
400 V and below (without
Less than 3 months
* Provided there is no delay in the approval given by Local Authorities
However 132kV supply projects can be given within 24 months on a Fast Track basis on the following categories:
Fast Track 132kV Project
Terms & Conditions
12 months a) PMU Site or Lines/Cables Right Of Way (ROW), Route Survey and Profile Plan To Be Made Available By The
Customer & Notice To Enter (NTE) Issued By TNB Without
b) Length of Underground Cable: max. 5km
c) Length of Transmission Line: max. 5km
d) All Major Equipments Must Be Readily Available.
a) Site or Lines/Cables ROW, Route Survey and Profile Plan To Be Made Available By The Customer & Notice To Enter (NTE)
Issued By TNB Without Any Encumbrances.
b) Length of Underground Cable: max. 5km
c) Length of Transmission Line: max. 10km
d) Equipments To Be Procured Based on Equipments that Have
Been Installed in TNB System.
a)Site or Lines/Cables ROW, Route Survey and Profile Plan To Be Made Available By The Customer & Notice To Enter (NTE)
Issued By TNB Without Any Encumbrances.
b)Length of Underground Cable: max. 5km
c)Length of Transmission Line: max. 20km
d)Equipments To Be Procured Based on Equipments that Have
Been Installed in TNB System.
What The Electrical Consultant Engineer Should Do
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:
Submits application for the proposed development to Local Authorities / One Stop Centre 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 Local Authorities/ One Stop Centre.
Upon approval of the Development Order Plan, Electrical Consultant submits application for the electricity supply to Pusat Khidmat Pelanggan. Complete details as outlined in Appendix 5 and Appendix 7 (Summary of Load for Demand Exceeding 100kVA (~ 140A)) must be submitted with the application. The application must be accompanied by 3 copies of the following :(i) (ii)
Latest Development Order Plan approved by Local Authority
Site plan showing the lot number (s) and proposed substation sites Layout plan of substation building
Single line diagram / schematic of installation
Layout plan of proposed consumer switchroom (where applicable) 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 details of the connected loads, motors/appliances, the associated ratings, type of motor starter and their arrangements (where applicable). Submit Power Quality Compliance Declaration Form (Appendix 8) Submit the metering requirements for CT Meters as in Appendix 9
Ensure that all the amendments/additional requirements if required by TNB are complied with and resubmitted to TNB.
Ensure that the Applicants main switchroom shall be located in accordance to TNB’s requirements.
Provide appropriate cable trenching from the TNB’s 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 consumer’s switchroom or substation. Ensure appointed Electrical Contractor (by Applicant) is registered with Energy Commission for the purpose of wiring up the premises
Provide installation test results and protection settings for all CT metered
Advise Applicant to submit application form through registered Electrical Contractor. The process is similar as outlined in Section 2.
Ensure that the wiring and the installation work of Applicant’s equipment shall be supervised by competent person(s).
Advise Applicant to deposit a sum of money equivalent to 2 months bill (as reviewed from time to time) upon receiving the notice of deposit. For deposit of more than RM2,000 the applicant are encourage to settle via Bank Guarantee.
Dispute Between Applicant And Electrical Consultant Engineer 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.
APPLICATION PROCESS FOR STREETLIGHT
This procedure outlines the process for the application for streetlight.
Types of Applications
The three (3) types of application for streetlights are:
Application made by the Local Authority/Government Authority Application by Developer
Application by Individual
Application by Developer
The Developer should take the following steps to apply for streetlight. Steps
Appoint a Consultant Engineer (Registered with the Board Of Engineers Malaysia) and an Electrical Contractor (registered with the Energy Commission). The application is made together with the supply application for a new development with all the load details of the proposed public lighting that is approved by the Local Authority.
Electricity Contract Forms to be signed by Local Authority before TNB commissions the street light.
Application By Individuals/Local Authority/Government Authority 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
Installation of streetlight on existing
Consumer submits application to the Pusat
The applicant settles the full cost of additional new
PLANNING AND DESIGN CRITERIA……………………………………………. Steady-State Supply Voltage Performance……………………………………………… Supply Security Level …………………………………………………………………… 1.2.1
Adopted Security Level Definitions For TNB Distribution System …………. 1.2.2
Supply Security Level to Consumers …………………………………………. 1.2.3
Request For Higher Supply Security Level ………………………………….. Power Quality ………………………………………………………………………..… 1.3.1
Power Quality Requirements ……………………………………………….… 1.3.2
Requirements of Consumer’s Equipment …………………………………… 1.3.3
Declaration to Power Quality Requirement….…………….………………… Short-Circuit Levels ………………………………………………………..………….. Protection Requirements………………………………………………………………… 1.5.1
Basic Requirements ……………………………………………….………….. 1.5.2
Specific Requirement…………………………………………………………. 1.5.3
Protection System Evaluation Process …………………………….………….
DEMAND ESTIMATION …………………………………………………………….. Demand Estimates For Consumer Sub-Classes Or Premises ………………………….. Demand Estimates For Mixed Development Area …………………………………….. Group Coincident Factor………………………………………………………………..
SUPPLY SCHEMES …………………………………………………………………. Maximum Demand Levels And Supply Schemes ………………………….………….. Substation Categories, Type & Design……………………………………..…………… 3.2.1
Substation Categories……………………………………………..…………. 3.2.2
Land Or Building Size Requirements For Substations………………………. 3.2.3
Type Of Fire Fighting System For The Substations ……………………………. Standard And Special Feature Design Schemes ………………………………………
PLANNING AND DESIGN CRITERIA
TNB refers to Grid Code and Distribution Code in developing the connection system or supply infrastructure needs which are included in this section. It is available at the
Energy Commission’s office.
1.1 STEADY-STATE SUPPLY VOLTAGE PERFORMANCE
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 1-1 below:Table 1-1: Steady -state
voltage level fluctuation limits under normal conditions Voltage Level
400V and 230V
6.6kV, 11kV, 22kV, 33kV
132kV dan 275kV
-6% & +10%
-5% & +10%
-5% & +5%
Steady-State Voltage Fluctuation under Contingency Condition Under contingency condition, when one or more circuit elements are on outage, the power frequency steady-state voltage at all points in the distributor’s distribution system including the points before the consumer metering must be planned to be maintained as follows: Table 1-2: Steady-State Voltage Fluctuation Limits under Contingency Condition Voltage level
400V and 230V
6.6kV, 11kV, 22kV,33kV
132kV & 275kV
+10 & -10%
-10% & +5%
1.2 SUPPLY SECURITY LEVEL
Supply 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 1-3.
Adopted Security Level Definitions For TNB Distribution System Table 1-3: Security Levels for Distribution Network
Average Restoration Period
Less than 5 seconds
Less than 15 minutes
Less than 4 hours
Less than 24 hours
Supply Security Level to Consumers
In accordance to Guarateed Service Level (GSL), for supplies to consumers at voltage levels of 11kV, 22kV and 33kV, large part of the network are generally designed to facilitate an average supply restoration of less than 4 hours (Security Level 3). In some instances where alternative feedback source is not available consumers at voltage levels of 11kV, 22kV and 33kV may have supply restoration time of 12 hours.
For supplies at 230V and 400V, the restoration period may vary beyond 4 hours (Security Level 4) depending on the type of network fault.
Time to restore electricity supply following major incident on grid or transmission system except due to natural disaster, and causing partial blackout, restoration time shall be within 8 hours and for total blackout situation it shall be within 18 hours.
Request for Higher Supply Security Level
However, 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 fully by the consumer.
Power Quality Requirement
184.108.40.206 TNB supplies electricity by the alternating current (ac) system with system frequency of 50 Hz with specified regulated voltage levels. The ranges of voltage regulations available are explained in section 2.1 of this guideline.
220.127.116.11 TNB shall supply electricity to the main incoming terminals or point of common couplings (PCC) between the consumers and TNB with voltage sag performance as indicated in standards IEC 61000-2-4 and IEC/TR 61000-2-8.
18.104.22.168 TNB does not guarantee that the electricity supply will not be interrupted or its frequency and voltage will not fluctuate outside the ranges stated in section 2.1. The reliability of the supply system is evaluated by the Supply Average Interruption Duration Index (SAIDI). And the duration of supply restoration will be dependent upon the determined security levels as stated in section 2.2.
22.214.171.124 The supply voltage and frequency may fluctuate for short duration outside the voltage ranges stated in section 2.1 due to the following:a) When TNB takes the necessary action for safety reasons, b) When TNB carries out critical maintenance and repairs on the network components, c) When matters outside the control of TNB i.e. external influences, are the causes of the supply problem; and
d) Other circumstances that cause supply to be interrupted or cause voltage and frequency to fluctuate.
126.96.36.199 The consumer shall ensure that all equipment to be connected to TNB supply system is compatible with the frequency and voltage to be supplied.
Requirements of Consumer’s Equipment
188.8.131.52 TNB specifies requirement that the consumer’s must comply with in order to limit the impact of the potential short duration voltage and frequency fluctuations. 184.108.40.206 The requirements are:Table 1-4: TNB Power Quality Requirements Type Of
Acceptable permissible values at
point of common coupling (PCC)
1% – Frequent starting/switching
and/or disconnection of load.
3 % – Infrequent single starting/
switching or disconnection of Load
– once in two hours or more hours.
6 % – Starting/switching once or
twice a year.
1.0 (at 132kV and below)
0.8 (Above 132kV)
0.8 (at 132kV and below)
0.6 (Above 132kV)
5 % at 400 Volt
4 % at 11kV to 22kV
3% at 33kV
3% at 132kV
2% for 1 minute
220.127.116.11 It is the responsibility of the consumer to ensure that his/her voltage sensitive equipment is able to function continuously through unanticipated voltage sags, caused when the system is subject to external
interference such as lightning, 3rd party cable damage, other consumer’s equipment fault, TNB equipment fault etc.
18.104.22.168 The consumer must select modern equipment that is able to ride through many of these voltage sags. Consumers should ask their equipment manufacturers whether their equipment can function properly during the voltage sag conditions illustrated in the European Standard EN 50160, IEC Standard 61000-2-2 and IEC Standard IEC 61000-2-4. If the equipment does not have any immunity to voltage sags, then the consumer should request from the manufacturers on measures to immune the equipment against voltage sags. 22.214.171.124 The recommended standards to refer for evaluating equipments’ sensitivities and identifying immunity solutions to voltage sags, short interruption and voltage variations are IEC Standard 61000-4-11 and IEC Standard 61000-4-34.
126.96.36.199 Guidelines on some immunity measures against voltage sags can be referred to TNB Power Quality Guidebook at http://www.tnb.com.my/tnb/con_quality.htm 1.3.3
Declaration to Power Quality Requirement
188.8.131.52 The consumer is required to declare his equipment compatibility and compliance with regards to the required power quality standard using the Power Quality Compliance Declaration Form in Appendix 8.
TNB network are design and operated in order to remain within the limits of short-circuit levels as in Item 1.4.5 of Supply Application Section. TNB equipment design is specified to the same Short Circuit rating. Consumer’s equipment at the point of interface or part of the interconnection design shall also comply with the minimum Short Circuit rating. TNB may provide indicative or prospective fault level in terms of X/R at the interface point
with consumer, if so required for detailed installation design.
1.5.1 Basic Requirements
In all cases, the basic requirement is that the consumer’s arrangements for protection at the connection point, including types of equipment and protection settings, shall comply with TNB practices, and be as TNB specifies during the application for supply process. This is especially critical for MV and HV consumers.
1.5.2 Specific Requirements
Consumers shall take into consideration the following specific protection practices of TNB in designing their installation:
Maximum clearance times (from fault current inception to fault clearing) must be within the limits established by TNB in their short circuit rating policy.
Auto-reclosing or sequential switching features may be used on TNB’s 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.
On some of TNB’s distribution systems, certain types of faults may cause
disconnection of one phase only of a three-phase supply.
The following additional protection features are recommended to consumers with special requirements:
For voltage sensitive consumer, it is advisable to install over/under voltage protection scheme.
Consumer intending to have more than 1 incoming feeder shall take into consideration supply option with Automatic Transfer Scheme (ATS). However, all technical requirements shall be discussed and agreed by both TNB and consumer.
All costs and installation work are to be borne by consumer. 1.5.3 Protection System Evaluation Process
Consumer’s 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 TNB’s supply system. Submission of schematic of
installation indicating proposed
protection schemes for incoming
Submission of device
specifications & test results
Submission of Protection
Coordination Studies of internal
installation & proposed setting
Review of installations
protection scheme and design of
supply scheme to consumer
TNB performed integrated
protection coordination studies
& confirm setting
Consumer advised on required
changes to match planned
Witness testing and
verification at site before
Figure 1-1 above illustrates the steps involved in the evaluation of protection schemes. 27
Supply schemes and networks are to be adequately designed or dimensioned to meet initial and growth of consumer individual and group maximum demand.
The demand estimates are based upon load declared by consumer and TNB’s own information on load profile characteristics for various consumer classes. Range of values are given as demand profile are known to varies according to geographical location of consumers around the TNB service areas in Peninsular Malaysia.
Fairly accurate assessment of individual and group demand of consumers are
critical for correct dimensioning of network or facilities in meeting the initial and future demand of consumers as imposed on the network.
2.1 Demand Estimates For Consumer Sub-Classes Or Premises
Table 2-1 and Table 2-2 indicates the typical ranges of maximum demand for domestic and shop-lots or shop-houses respectively. These values shall be subjected to revisions based upon of latest results load profiling studies.
Table 2-1: Range of maximum demand (M.D) for domestic consumer sub-classes or premises
Type Of Premises
Low cost flats, single
storey terrace, studio
apartment ( < 600 sq ft)
Double storey terrace or
Single storey bungalow
Double storey bungalow
& luxury condominium
Table 2-2: Range of maximum demand (M.D) for types of shop-houses No:
Type Of Premises
Single storey shop house
Double storey shop house
Three storey shop house
Four storey shop house
Five storey shop house
* The above MD range is meant for reference as the minimum value. MD declared by consultants must be accompanied with the connected load and design calculations of the development. For underground system, every lot of shop house is required to have individual service cable termination chamber and isolator / fuse switch
2.2 Demand Estimates Of Mixed Development Area
Accurate determination of the maximum possible demand for a newly proposed development is critical in the effective long-term planning of supply network within the specific area. Adequate land areas for transmission main intakes (PMU 275kV, 132/33kV, 132/22kV, 132/11kV), major distribution stations (PPU 33/11kV, 22/11kV), sub-stations (PE 11/. 4kV, 22/. 4kV), feeder pillars, underground cable and overhead line routes will have to be allocated at the layout approval stage by the relevant authorities.
The total demand will indicate the supply voltage and target network
configuration for the whole development area. Network facilities will be developed in phases in tandem with physical development.
Site selections for PMU, PPU, sub-stations and feeder routes are determined at development plan stage to achieve optimal technical performance of network and costs based on the planned target network.
2.3 Group Coincident Factor
Group coincident factor is applied in the computation of unit demand and group demand. The typical values for coincident factors for different groups of consumers are as tabulated in the table below: