HV Cable Sizing Calculation

HV Cable Sizing Calculation (MOL) - Fahahil

A Input Input Data Data as per per Spe Speci ciica icatio tions ns 1 2 ! 4 5 6

Nominal System Voltage #ighest System Voltage Short $irc%it ca&acity )ro%n( tem&erat%re Soil thermal resistivity aim%m (e&th o' laying

     

!.! "V !.6 "V 25 "A 'or 1 secon( 40 *$ 2.5 *$ m+ 1.0 m

! Calculation !" #e$uire% cross cross section o cable or or short circuit &ithstan%ing &ithstan%ing capabilit' /he ne cale shall ithstan( a a%lt level o' 25 "A 'or 1 sec. $ale cross section o' 22 s$100 is s$100 is ale to ithstan( the 'a%lt level level  42.< "A 'or 1 sec. sec. 3 Re'er cale catalog%e in Attachment-1, sheet !  For a%e$uac' chec o continuous current capacit'  *oltage %rops+ ollo&ing steps are utilise% ( #eer attache% sheet or calculation ) !, Dera Derate te% % curre current nt

 Ic : ;DF

2006-4851 Rev. 1

HV CA!L7 SI=I9> CALC3LA;IO9  A

?

Sl.

$

No. rom

1

7

>



ee(er (etails

14S?-!00!

/o

VS7S n&%t

%ll loa( :oa(

$ale

c%rrent

:ength

in Am&s.

3:

3'lc

"VA

metres

1600

150

)

#

Starting $ale ty&e c%rrent

3$D+9:>+



@



:

No. o'

/y&e

/otal

in. reC(.

o'

7erating

cale

installation

'actor

c%rrent

/7

rating

r%ns

in Am&s. SA+V$ 3st 'lc6.5

2F<.<

-

G>S

1

)ro%n(

0.6208

 ro&ose( cale siEe

N

B



=

R

S

$%rrent

Res%lt

Voltage

;

Voltage

;

rating o' the

'or &ro&ose(

(ro&

Volt-(ro&

(ro&

Volt-(ro&

&ro&ose(

cale s iEe

(%ring

(%ring

(%ring

(%ring

r%nning r%nning

starting

starting

cale

3+

3SC.mm.

3am&s.

450.<

!00

481

SA>

volts

;

volts

;

8.15

0.25

-

-

trans'ormer 

Manuacturer %ata ( reer attache% D3CA! catalogue copies ) Derating Factors for cables laid in ground  7erating 'actor 'or gro%n( tem&erat%re

 Cable %ata ?

"12@

7erating 'actor 'or variation in thermal resistivity o' soil 2.5 *$ + 3%lticore

$ale

Resistance Reactance $%rrent rating

siEe

in )ro%n(

?

21@.

3SC.mm

3ohms+"m

3ohms+"m

3am&s.

?

21B

!00

0.08

0.08

481

lai( in horiEontal 'ormation to%ching

?

21B

;DF or cables lai% in groun%



21,2B

7erating 'actor 'or (e&th o' laying 3 %&to !00 sC.mm.  7erating 'actor 'or gro%&ing to cales

Notes

2006-4851, rev 1 Attachment-1, Sheet 2

LV CA!L7 SI=I9> Derating actors  The following De-rating factors are considered for LV cable sizing.: Laid In Ground

%ro&nd Te!perat&re  40 0) "

0.82

A

3re'er /ale ! o' 7%ca catalog%e in  Attachment-2, sheet !

oil Ther!al resistiit6 " 2.' deg.) !,

0.74

B

3re'er /ale 4 o' 7%ca catalog%e in  Attachment-2, sheet !

Depth of installation  700 !!"

0.#$

C

3re'er /ale 5 o' 7%ca catalog%e in  Attachment-2, sheet 4

%ro&ping of cables for ' circ&its

0.'#

D

3re'er /ale F o' 7%ca catalog%e in  Attachment-2, sheet 5

(ence Total De-rating factor for )ables "

A:!:C:D 0.!44

Voltage Drop at stea%' State Voltage drop " !V * + * L,000 in olts

LV CA!L7 SI=I9> CALC3LA;IO9 ;A!L7 7$uip0ent Description 4 ;ag 9u0ber ;o

       %   o   a   g   o   n    L    i    t   a    #

Fro0 3A

3? in VA

VS7S /r'e Secon(ary-1H2

VS7S anel ncomer Dnit

800

VS7S nverter-1+2H!

VS7S otor

  g   n    i    t   a    #   r   o    t   o    M

3$ in 8

  g   n    i    t   a    #   r   e    %   e   e    F

  g  e   n  g    i   a    t   t    l   a   r   o   e   V   p    O

37 3> in in A0ps Volts

  r   r   e    t   o   &   c   o   a    6    F

3

   t    %   n   a   e   o   r    L   r    l   g  r   u    l    l    l   o   n   t   '   u    C   a   r   i   c   c    F   e   t   n   *  a   r   a   e    O  e   F    i   c    D    i            7

  e    %      e  o   l   r   '   b    i   a    t   u   i   $  c   C   e  a    #  p   0    A

3)

415 F41

415

0.80

0.<0

  e  e    l   z    b   i   a   S    C    %   e    t   c   e    l   e    S

3# in A0ps

3

3@ in A0ps

111!.00

0.!44

!2!5.46

1C x 630 

F41.00

0.!44

2154.0F

300 

  '    t   g   t   n    i   n   i   c   e   r   '   a   r   r   p   u   r   a   a    C   C   C   e    l    b   a    C

3 3: in #uns S$1001 per 6h

   h    t   g   n   e    L   e    l    b   a    C

3 in A0ps

3N in Mtrs

4

1000

155

4

5<0

140

Voltage Drop Stea%' State    %   e   e   l    t   c   b   e   a    l   e   C    S   r   o    F

3B in

  g   n    i    t   r   a    t    %    S   e   r   &   o   o    t    l   o    l    A    M

Voltage Drop During Motor Starting    t   n   e   r   r   u    C

  e    %   l   e   b    t   c  a   e   C    l   e    S

   %   e   &   o    l    l    A

0V4A40

3 in E

3= in E

3R in : FL

3S in E

3/ in E

0.1<5

2.0!

5.0

NA

NA

N.A

0.1<0

1.1<

5.0

NA

NA

N.A

9O;7S H ? !4("1@,:7) or (C4>)4("1@,:7:F) or D G ? H4I 6 ? H:9:O:"224(7:"222:L) S ? 6:#

2006-4851, rev 1, Attachment-2, sheet 2