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  • Electrical system design : RMUTL 1

    2

    Electrical system design : RMUTL 2

    2.1 - 10-20 kV

    -

    -

    -

    -

    -

    Electrical system design : RMUTL 3

    2.2 2.1

    10-20 kV

    230 kV

    230 kV

    230 kV 69 kV

    69 kV

    24 kV

    24 kV 416/240 V

    24 kV 416 / 240 kV

    69 kV 24 kV

    2.1 Electrical system design : RMUTL 4

    1) ( Generating System )

    2) ( Transmission System )

  • Electrical system design : RMUTL 5

    3) ( Distribution System )

    4) ( Utilization System )

    Electrical system design : RMUTL 6

    2.3

    3

    - ( . )

    Electricity Generating Authority of Thailand ( EGAT. )

    - ( . )

    Metropolitan Electricity Authority ( MEA. )

    - ( . )

    Provincial Electricity Authority ( PEA. )

    Electrical system design : RMUTL 7

    2.4

    2

    1. ( Independent PowerProducer IPP )

    2. ( Small Power Producer SPP ) Electrical system design : RMUTL 8

    1) -

    -

    - 5

  • Electrical system design : RMUTL 9

    2) -

    - 6-8

    - , ,

    3) - 15

    -

    -

    Electrical system design : RMUTL 10

    4)

    -

    -

    Electrical system design : RMUTL 11

    -

    -

    - ( Overhead Aerial Line )

    - 4 500 kV 3 3 50 Hz

    230 kV 3 3 50 Hz

    115 kV 3 3 50 Hz69 kV 3 3 50 Hz

    Electrical system design : RMUTL 12

    2.5 3

    - - -

    ( Subtransmission System )- 230 kV- 115 kV- 69 kV

  • Electrical system design : RMUTL 13

    ( Distribution System )

    - 69 kV 115 kV 24 kV

    12 kV

    - 69 kV 115 kV 2

    - ( Power Transformer )

    2-4

    -

    8 MVA 12 kV

    15 MVA 24 kV

    . 12 kV 24 kV

    24 kV Electrical system design : RMUTL 14

    24 kV

    69 kV , 1 69 kV , 2

    Station Service 24 kV

    (ONAN/ONAF1/ONAF2)

    HV CB

    36/48/60 MVA

    69 kV/24 kV

    HV CBTie CB

    69 kV/24 kV

    36/48/60 MVA (ONAN/ONAF1/ONAF2)

    HV CB HV CB

    2.2 .

    Electrical system design : RMUTL 15

    ( Utilization System )

    - 24 kV 12 kV 416/240 V 3 4

    12 kV 24 kV

    416 V

    240 V

    416 V

    N

    C

    B

    416 V

    A

    240 V

    240 V

    2.3 .

    Electrical system design : RMUTL 16

    2.6

    1)

    -

    -

    -

  • Electrical system design : RMUTL 17

    2)

    - 230 kV, 115 kV 69 kV

    -

    3)

    -

    4)

    - 100 kW

    Electrical system design : RMUTL 18

    1) 22 kV Conventional Solidly

    Grounded System

    - - 3 3 3 4

    3 3

    1 2

    22 kV

    22 kV 22 kV

    22 kV

    C

    B

    A

    2.4 22 kV Conventional Solidly Grounded System

    Electrical system design : RMUTL 19

    2) 33 kV Multigrounded System WithOverhead Ground Wire

    -

    -

    3 4

    C19 kV

    1 2

    Overhead Ground Wire

    33 kV

    A

    33 kV

    33kV

    B

    N

    2.5 33 kV Multigrounded System With Overhead Ground WireElectrical system design : RMUTL 20

    ( Overhead Aerial System )

    2 - Radial Line

    4

    1

    .

    2

    3

    115 kV/22 kV

    22 kV/400-230 V

    2.6 Radial Line

  • Electrical system design : RMUTL 21

    - Tie Line

    .

    .

    B

    .

    .

    A

    2.7 Tie Line Electrical system design : RMUTL 22

    1) 1

    1 2 230 V

    1 3 460/230 V

    1

    230 V

    230 V

    230 V

    460 V

    1 2

    1 3

    1

    2.8 1

    Electrical system design : RMUTL 23

    2) 3 4

    - 400/230 V

    3

    22 kV

    33 kV

    400 V

    400 V

    230 V

    230 V

    230 V400 V

    N

    B

    C

    A

    3 4

    2.9 3

    Electrical system design : RMUTL 24

    2.7

    300 kVA (Low Voltage)

    (Medium Voltage)

    (High Voltage) (Substation)

  • Electrical system design : RMUTL 25

    1) 220 V 1 2

    - 5 ( 15A ) , 220 V

    - 15 ( 45A ) , 220 V

    - 30 ( 100A ), 220 V- 50 ( 150A ), 220 V

    Electrical system design : RMUTL 26

    ()

    2) 380/220 V 3 4

    - 15 ( 45A ) , 380 V

    - 30 ( 100A ) , 380 V

    - 50 ( 150A ) , 380 V

    - 200 A , 380 V- 400 A , 380 V

    Electrical system design : RMUTL 27

    ()

    3) 12 kV 3 3

    15A ( 300 kVA )

    750 A ( 15000 kVA )

    4) 24 kV 3 3

    10A ( 400 kVA )625 A ( 25000 kVA )

    Electrical system design : RMUTL 28

    1)

    Wh

    2.10

  • Electrical system design : RMUTL 29

    2) -

    -

    -

    Electrical system design : RMUTL 30

    CT

    VT

    Wh

    LA

    LA

    2.11

    Electrical system design : RMUTL 31

    CT

    VT

    Wh

    LA

    2.12 Electrical system design : RMUTL 32

    CT

    24 kV Gas-Insulated RMU

    12/20 kV 240 mm

    Wh

    2

    VT&

    2.13

  • Electrical system design : RMUTL 33

    CT

    24 kV Gas-Insulated RMU

    12/20 kV 240 mm

    Wh

    2

    VT&

    12/24 kV 24 kV

    2.14

    Electrical system design : RMUTL 34

    CT

    24 kV Gas-Insulated RMU

    12/20 kV 240 mm

    Wh

    2

    VT&

    12/24 kV 24 kV

    2.15

    Electrical system design : RMUTL 35

    2.8 ( Distribution Circuit Arrangements ) 5

    1. Radial System

    2. Primary-Selective System

    3. Secondary-Selective System

    4. Secondary Spot Network System

    5. Looped Primary System

    Electrical system design : RMUTL 36

    Radial System

    -

    -

    LVCB

    LV MV

    Fuse

    TR

    LVCB

    LV = Low VoltageMV = Medium VoltageTR = TransformerMDB = Main Distribution Board

    MDB MDB

    2.16 Radial Circuit

  • Electrical system design : RMUTL 37

    LVCB

    TR1

    Fuse

    LVCB

    TR2

    Fuse

    LVCB

    TR3

    Fuse

    CB

    MVMV

    CB

    LVCB

    TR3

    Fuse

    LVCB

    TR2

    Fuse

    LVCB

    TR1

    Fuse

    CB

    CB = Circuit Breaker ( )LVCB =

    ( ) ( )

    2.17 Radial Circuit

    Electrical system design : RMUTL 38

    Primary-Selective System-

    2.18 Primary Selective

    LVCB

    TR1

    CB

    MV

    Fuse

    TR2

    LVCB

    CB CB

    FuseFuse Fuse

    Electrical system design : RMUTL 39

    Secondary Selective System-

    -

    2.19 Secondary Selective

    Normally Open

    Service Bus

    TR1

    Fuse

    MV

    CB

    Fuse

    LVCB

    Primary

    TR2

    LVCB

    Electrical system design : RMUTL 40

    4

    1.

    2. AirForced Cooling 30-40 %

  • Electrical system design : RMUTL 41

    3.

    4. ( Overload )

    Electrical system design : RMUTL 42

    Normally

    TR1Fuse

    MV

    CB

    LVCB

    CB

    Open

    TR2

    LVCB

    FuseCB

    2.20 Secondary - Selective

    Electrical system design : RMUTL 43

    Secondary Spot Network System

    -

    -

    - (Network Protection)

    Circuit BreakerPrimary Switch or

    Network Protector

    CB

    MV MV

    Fuse

    TR1

    Fuse

    TR2

    CB

    2.21 Secondary Spot Network

    Electrical system design : RMUTL 44

    Looped Primary System

    - Close Loop- Open Loop

    Isolating Switches

    MV

    CB

    CB

    2.22 Close Looped Primary

  • Electrical system design : RMUTL 45

    RMU RMU RMU RMU

    CB CB

    CB

    MV

    TR 1 TR 2 TR 3 TR 4

    2.23 Open Looped Primary

    Electrical system design : RMUTL 46