Basic of Power System DesignBasic of Power System Design

• 1 2 -

• 1 3 -

• 3 4 -

• 2

1. ( .) ., ,

2. ( .)

( .)

(3 ) – 12 kV 24 kV

(3 4 ) – 416 / 240 V ( )

- 380/220 V

- 416/240 V 24 kV

( .)

(3 ) – 22 kV 33 kV (3 4 ) – 400 / 230 V ( )

- 400/230 V

- 400/230 V 22 kV

(Loads)

1. ( ) 2. ( , ) 3. 4. -

- 5.

Wire way Cable Tray

Consumer Unit

Load Center

Main Lugs Main Breaker

Main Distribution Board ( MDB)

1,000 kVA 2,000 kVA

1) - 300 kVA- 3.3 kV

2) - 200 kVA

3) -

.

END OF SECTIONEND OF SECTION

Standard of Power System DesignStandard of Power System Design

• (Product Standard)

• (Installation Standard)

2

(Product Standard)• •

•

• “ ( .)”

(Product Standard)

• • UL• NEMA• CSA• IEC

•

• TIS

•

•

• (IP) IEC 529 NEMA

(Index of Protection, IP)

IEC 2 3 IP

1 - ( )

2 -

3 -

IP

NEMA

* IEC144 **

NEMA IP

NEMA IP IP NEMA

(Installation Standard)•

- National Electrical Code (NEC)- International Electromechanical Commission (IEC)

•- ( ., MEA)- ( ., PEA)- ( . . .)- -

• . . . ( 2552)

•

•

•

•

• . . ( )

•

•

• National Fire Protection Association (NFPA)- NFPA 70 – National Electrical Code (NEC)

National Electrical Code (NEC)

•• 3 • Code

NEC Handbook

•

• ( ) (Euro)

•

•

• . . . IEC- -

Electrical Symbols & Electrical DiagramElectrical Symbols & Electrical Diagram

(1)

(2)

(1)

(2)

(1)

(2)

(3 Ways Switch)

1

• (Sa) 1 1

• LC 1 1 • 2

• 1 – 2

2

2

2

3

• (Sa) a• (Sb) b• (LC) 1

1 ( A)

3

3

4

• (Sa) a• (Sb) b• (LC) 2

1 ( A) 3 ( B)• ( 4 )

4

4

5

• 3 (S3a) 2 • 4 (S4a) 1 • (LC) 1

1 ( A)

5

5

6

• (Sa) a 2 • (Sb) b 2

• (LC) 3 1 ( A) 3 ( B) 5 ( C)• ( 4 )

• (Sc) c 2

6

6

Home Work

• /

29 2556

•

End Of SectionEnd Of Section