Tenaga Nasional Berhad

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3.2 Group Diversity Group diversity is applied in the computation of unit demand and group demand. The typical values for diversity factors for various consumer classes is as in the table below. Table 3-3: Typical Group Diversity Values Consumer classes Domestic Less than 10 consumers More than 10 consumers Commercial or industrial Less than 10 consumers More than 10 consumers Group Diversity factors 0.80 0.75 0.80 0.75 3.3 Demand Estimates For A 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 132/33kV, 132/22kV, 132/11kV), major distribution stations (PPU 33/11kV, 22/11kV), sub-stations (PE 11/. 415kV, 22/. 415kV), 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 normally made to achieve optimal technical performance of network and costs based on the planned target network. Appendix 15 indicates the sample M.D worksheet for a mix development area to be filled up and submitted to TNB at the supply application stage. 3.4 Demand Projection And Substation Requirements For LV Scheme Demand projection of a new development area, say a proposed housing scheme, determines the number of sub-station requirements (11/. 415kV) in the design of low voltage system. Appendix 16 indicates the method for determining the overall numbers and capacity of sub-station for a typical housing or commercial scheme based upon the projected demand growth. TENAGA NASIONAL B E R H A D 43
SECTION 4: SUPPLY SCHEMES Based upon consumer declared demand level and required security level, supply schemes to consumers are appropriately designed to meet these requirements and planning criteria as discussed in section 2. 4.1 Maximum Demand Levels And Supply Schemes The table below indicates the typical schemes for various demand levels of individual consumers. In the case of maximum demand (M.D) ranges of 5MVA to 10MVA, the supply voltage options of either 11kV or 33kV will ultimately be determined by the predominant supply voltage where the prospective consumer is to be connected. Consumers with M.D approaching 1000kVA have the option of taking supply at 11kV. Table 4-1: Typical supply schemes for various M.D levels M.D ranges of individual consumer Supply voltage Typical supply scheme Up to 12 KVA 240V Overhead services from LV mains. 12kVA to 100kVA 100kVA to 1000kVA 1000kVA to 5000kVA 1000kVA to 10000kVA 5000kVA to 25000kVA Above 25000kVA 415V 415V 11kV 22kV 33kV 132kV , 275 kV Three phase overhead or underground cable service from existing LV mains. Direct cable service from LV board from a sub-station Directly fed through TNB 11kV switching station Directly fed through TNB 22kV switching station Directly fed through TNB 33kV switching station Directly fed through TNB 132kV and 275kV switching station respectively 4.2 Substation Categories, Type & Design 4.2.1 Sub-station categories a. Transmission Main Intake (Pencawang Masuk Utama-PMU) Transmission Main Intake is the interconnection point of 132kV or 275kV to the distribution network. The standard transmission capacity and voltage transformation provided at the PMU are as follows:- 44 TENAGA NASIONAL B E R H A D
Page 2 and 3: Vision To be among the leading c
Page 4 and 5: CONTENTS SUPPLY APPLICATION 1.0 Ten
Page 6 and 7: 1.0 TENAGA NASIONAL BERHAD ELECTRIC
Page 8 and 9: e) Elektrik Bestari TNB provides el
Page 10 and 11: 1.10 Types Of Supply Application Al
Page 12 and 13: 1.18 Tariff Please refer to the Tar
Page 14 and 15: 2.4 TNB Supply Lead Time The flowch
Page 16 and 17: Stage Description 2 TNB Register Ap
Page 18 and 19: Steps Action Reference 2 After appr
Page 20 and 21: Steps 7 8 Action Advise applicant t
Page 22 and 23: CONTENTS Page 1.0 PLANNING FOR C
Page 24 and 25: 1.1.1.1 Technical Requirements For
Page 26 and 27: Should a preliminary examination of
Page 28 and 29: • Capacitance connected in parall
Page 30 and 31: SECTION 2.0 PLANNING AND DESIGN CRI
Page 32 and 33: For the purpose of this guideline,
Page 34 and 35: Table 2.3.4.1: Voltage limits on sw
Page 36 and 37: 2.3.5.6 If under the operating cond
Page 38 and 39: Table X: Planning Levels for Harmon
Page 40 and 41: 3) At the terminals of a Customer
Page 42 and 43: 2.5.3 Protection System Evaluation
Page 46 and 47: - 132/33kV, 2 x 90 MVA - 132/22kV,
Page 48 and 49: The establishment of transmission m
Page 50 and 51: CONTENTS Page ABBREVIATIONS .......
Page 52 and 53: 1.0 GENERAL REQUIREMENTS 1.1 All th
Page 54 and 55: ii. iii. iv. The tickness of board
Page 56 and 57: 4.0 GROUP METERING FOR WHOLE CURREN
Page 58 and 59: v. The panel cover and metal plate
Page 60 and 61: 6.2 Specifications For Metering PTs
Page 62 and 63: 6.7.2 Outdoor Breakers A ‘marshal
Page 64 and 65: GLOSSARY AND DEFINITIONS In this gu
Page 66 and 67: Embedded Generating Unit A generati
Page 68 and 69: Protection Protection Apparatus Pro
Page 70 and 71: Appendix Topic Page 1 List of Kedai
Page 72 and 73: Appendix 1 List of Kedai Tenaga in
Page 74 and 75: Appendix 1 List of Kedai Tenaga in
Page 76 and 77: Appendix 3 PERMOHONAN BEKALAN ELEKT
Page 78 and 79: Appendix 5 TENAGA NASIONAL B E R H
Page 80 and 81: Appendix 7 PART B : TNB SUPPLY APPL
Page 82 and 83: Appendix 9 JOINT MEETING ACTION LOG
Page 84 and 85: Appendix 11 SAMPLE OF APPOINTMENT L
Page 86 and 87: Appendix 12 Load Category Total lig
Page 88 and 89: Appendix 13 LOCATION PLAN TENAGA NA
Page 90 and 91: Aku Janji dan Tanggungrugi *Pemilik
Page 92 and 93: Appendix 16 Demand forecast and sub
Page 94 and 95:
Appendix 17 SUBSTATION LAYOUT DRAWI
Page 96 and 97:
Appendix 18 SITE PLAN / LOCATION PL
Page 98 and 99:
Appendix 18 LOGO DETAIL FOR DOUBLE
Page 100 and 101:
Appendix 19 (Drawing 7B) MV/HV, 1 O
Page 102 and 103:
Appendix 19 (Drawing 7D) 3 FEEDER M
Page 104 and 105:
Appendix 19 (Drawing 7F) MV/HV, 3 F
Page 106 and 107:
Appendix 19 (Drawing 7H) 1, 2, 3 OR
Page 108 and 109:
Appendix 19 (Drawing 7J) 1, 2, 3 OR
Page 110 and 111:
Appendix 20 TENAGA NASIONAL B E R H
Page 112 and 113:
Appendix 22 DRAWING NO 2A : SINGLE
Page 114 and 115:
Appendix 23 DRAWING NO 3A : OUTDOOR
Page 116 and 117:
Appendix 25 DRAWING NO 4A : 3 PHASE
Page 118 and 119:
Appendix 25 DRAWING NO 4C : 3 PHASE
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Appendix 26 DRAWING NO. 4E TENAGA N
Page 122 and 123:
Appendix 27 DRAWING NO 5A : SINGLE
Page 124 and 125:
Appendix 27 DRAWING NO 5C : SINGLE
Page 126 and 127:
Appendix 28 DRAWING NO 5E: 3 PHASE
Page 128 and 129:
Appendix 29 TENAGA NASIONAL B E R H
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Tenaga Nasional Berhad

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