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For the purpose of this guideline, 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. 2.3.1.3 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. 2.3.1.4 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 2.3.2.1 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 Voltage Dips/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. TENAGA NASIONAL B E R H A D 31
2.3.3.2 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. 2.3.3. Malaysian Standard MS 1760:2004 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 61000-2-8 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 61000-2 series of guidelines set out the supply characteristics e.g. IEC 61000-2.8 as indicated above. IEC 61000-3 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 61000-4-11 & MS IEC 61000-4-34 series of standards specifies test methods. 2.3.3.5 Some equipment suppliers and trade organisations also specify the immunity levels for certain types of equipment for example Semiconductor Industry Guidelines SEMI F47, Computer and Business Equipment Manufacturing Association CBEMA Compatibility Guidelines. 2.3.3.6 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 Voltage Step Change 2.3.4.1 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 UK’s Engineering Recommendation P2 P2 on “Planning Limits for Voltage Fluctuations Caused by Industrial, Commercial and Domestic Equipment in the United Kingdom”, 1989. 32 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 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 44 and 45: 3.2 Group Diversity Group diversity
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
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Appendix 9 JOINT MEETING ACTION LOG
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Appendix 11 SAMPLE OF APPOINTMENT L
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Appendix 12 Load Category Total lig
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Appendix 13 LOCATION PLAN TENAGA NA
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Aku Janji dan Tanggungrugi *Pemilik
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Appendix 16 Demand forecast and sub
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Appendix 17 SUBSTATION LAYOUT DRAWI
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Appendix 18 SITE PLAN / LOCATION PL
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Appendix 18 LOGO DETAIL FOR DOUBLE
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Appendix 19 (Drawing 7B) MV/HV, 1 O
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Appendix 19 (Drawing 7D) 3 FEEDER M
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Appendix 19 (Drawing 7F) MV/HV, 3 F
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Appendix 19 (Drawing 7H) 1, 2, 3 OR
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Appendix 19 (Drawing 7J) 1, 2, 3 OR
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Appendix 20 TENAGA NASIONAL B E R H
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Appendix 22 DRAWING NO 2A : SINGLE
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Appendix 23 DRAWING NO 3A : OUTDOOR
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Appendix 25 DRAWING NO 4A : 3 PHASE
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Appendix 25 DRAWING NO 4C : 3 PHASE
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Appendix 26 DRAWING NO. 4E TENAGA N
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Appendix 27 DRAWING NO 5A : SINGLE
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Appendix 27 DRAWING NO 5C : SINGLE
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Appendix 28 DRAWING NO 5E: 3 PHASE
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Appendix 29 TENAGA NASIONAL B E R H
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