Tenaga Nasional Berhad

The establishment of transmission main intake also requires the allocation and acquisition of right of way or wayleaves
for the transmission lines. Depending on the specific design of each PMU, the overall right of way or wayleaves
requirements may be different.
Developers of large-scale development areas, depending on the estimated demand may be required to allocate land for
any or a combination of sub-stations categories, wayleaves or right of way for 132kV/275kV lines. These requirements
will be specified by TNB upon submission of tentative layout plans and load estimates for the whole development
area.
4.2.3 Type of fire fighting System for the Substation
Type of fire fighting system that is suitable for the substation has to meet the following criteria:
• The fire extinguishing agent has to be the type that is approved by TNB.
4.3 Standard And Special Feature Design Schemes
Standard features of supply schemes are categorized as those typical design schemes for individual or consumer groups
or classes. Typical cases are as follows:-
(i)
(ii)
Supply scheme supplying domestic premises is predominantly through overhead systems and conventional substation.
A fully underground network and any application of compact sub-station shall be considered as special
features for which all extra costs incurred by TNB are to be paid in full by the consumer.
Bulk consumers supplied at 11kV and above, are normally supplied via two in-feeds operating in parallel or nonparallel
operation depending on the demand and security level required. If for any reason another dedicated cable
is required purely for reasons of additional security, the extra costs shall have to be borne by the consumer.
4.4 Supply Schemes For Interconnection To Embedded Generators
Embedded generators depending on the capacity will be interconnected at 11kV and 33kV. The design of interconnection
scheme or facilities, which may include protection, operational control facilities will be so determined to ensure safe,
reliable and efficient interconnection scheme. The other design objective is to ensure that the interconnection of embedded
generators should not negatively impact system performance and reliability to existing consumers connected to the TNB
system.
TENAGA
NASIONAL B E R H A D
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