txr to 11kv ais cab size

8/19/2019 Txr to 11kv Ais Cab Size

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DATE REV. NO. DESCRIPTION CHECKED APPROVED

REVISIONS

LARSEN & TOUBRO LIMITED

ECC Division – EDRC

CLIENT : CONSULTANT :

PROJECT :

MAGADI PURE ASH PROJECT

JOB No. O33!"E"N#

TOTAL NO. O# PAGES TITLE :

NAME SIGN DATE

DSGN PTS 21.03.05

DESIGN CALCULATION " MV CABLE SI$E

CHKD SKW 24.03.05

APPD HVB 26.03.05

CODE REV.

DOC.No 2 0 7 6 - L T - 0 0 0 - E L - D C - 3 0 5 9 0

T h i s ! " # $ % & ' ( i s ( h & ) * " ) & * ( + " , L ' s ( n & T o ) * ' o L i + i , (

- . E C C

D i i s i " ' - E D . C

/ ' ! % $ s ( ' " ( 0 & ) / s s & !

" ' ( " / ' + ( h i * ! ) & * s " ' " * , i * % ' " ( / $ ( h " * i s & ! 0 + $

s 1 ' " * 0 & # " ) i & ! 2 % / ! & $ s & " , i ' , $ 3 3

" * ) / * ( 0 + s $ # h ) & * s " ' " * , i * % 4 i ( h " $ ( " $ * ) * i " * ) & * % i s s i " '

4 * i ( i ' 5


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2 of 16LARSEN & TOUBRO LIMITED

ECC Division - EDRC

PROJECT : ADWEADOCUMENT NO DATE

2076-LT-000-EL-DC-3059-00 3/12/2016

TITLE:

DESIGN CALCULATION - MV CABLE SIZINGPREPARED CHECKED SHEET

DESIGN CALCULATION

MV CABLE SIZING


3/16


ECC Division - EDRC

PROJECT : ADWEADOCUMENT NO

2076-LT-000-EL-DC-3059-00

TITLE:

DESIGN CALCULATION - MV CABLE SIZINGPREPARED CHECKED


4/16


ECC Division - EDRC


2076-LT-000-EL-DC-3059-00

TITLE:


INDEX

0.0.0 SYMBOLS & UNITS 3

1.0.0 DESIGN INUTS !

2.0.0 ENVI"ONMENTAL DETAILS !

3.0.0 CABLE DATA !

!.0.0 TYE O# LAYING 5

5.0.0 C$EC%ING O# S$O"T CI"CUIT WIT$STAND CAABILITY 5

6.0.0 C$EC%ING O# T$E"MAL AMACITY 5

7.0.0C$EC%ING O# STEADY STATE VOLTAGE D"O 6

.0.0 "ESULT 7

9.0.0 ANNEXU"E-1 ' TABLE #O" ALL CABLES


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ECC Division - EDRC


2076-LT-000-EL-DC-3059-00

TITLE:



6/16


ECC Division - EDRC


2076-LT-000-EL-DC-3059-00

TITLE:


0.0.0 SYMBOLS & UNITS

A Area of cross section of conductor Sq.mm

A1 Deratin! factor for Air tem"erature

A# Deratin! factor for !rou"in!

A$ Deratin! factor for

cosQ Po%er factor

E&UE Eart'ed & uneart'ed (o)ta!e ratin! of ca*)e +,

Eff Efficienc-

f Su"")- /requenc- H0

1 Deratin! factor for ,ariation in round tem"erature

# Deratin! factor for ,ariation in T'erma) Resisti(it- of soi)

$ Deratin! factor for De"t' of )a-in!

2 Deratin! factor for Hori0onta) formation

Current carr-in! ca"acit- of conductor in Air A

Derated Continuous ratin! of conductor A

Current carr-in! ca"acit- of conductor in round A

S'ort Circuit %it'stand ca"acit- required +A

3oad Current A

S'ort circuit %it'stand current of Conductor +A

KAir O(era)) deratin! factor for Air

Deratin! factor

Kd O(era)) deratin! factor for round

3 3en!t' of Ca*)e Mtrs

n No. of runs of ca*)es

P Rea) Po%er of 3oad +4

5 Reacti(e Po%er of 3oad +,AR

R Resistance of Ca*)e for t'e )en!t' se)ected Ohm

Rc AC Resistance "er unit )en!t' of Ca*)e o'm&Km

S A""arent Po%er of 3oad +,A

T Desi!n Am*ient Tem"erature

t Duration of /au)t %it'stand ca"a*i)it- seconds

, S-stem ,o)ta!e ,o)ts

,c ,o)ta!e rade of Ca*)e

,d ,o)ta!e dro" V

6 Reactance of of Ca*)e for t'e )en!t' se)ected O'm

6c 7nducti(e reactance of ca*)e o'm&Km

7cAir

7cDR

7cd

7/

73

7sc

Kd

oC


7/16


ECC Division - EDRC


2076-LT-000-EL-DC-3059-00

TITLE:



8/16


ECC Division - EDRC


2076-LT-000-EL-DC-3059-00

TITLE:


1.0.0 DESIGN INUTS

L()* D+,)/

1.1.1 3oad Descri"tion 8 11K( S4R

1.1.# /ed 9- 8 Transformer

I,/

1.#.1 S-stem ,o)ta!e , 8 11 +,

1.#.# /requenc- f 8 :; H0

1.#.$ S'ort Circuit %it'stand ca"acit- required 8 $1.: +A


9/16


ECC Division - EDRC


2076-LT-000-EL-DC-3059-00

TITLE:


$.1.B Reactance of Conductor 6c 8 ;.1; O'm&KM

$.1.@ S'ort circuit %it'stand current of Conductor 8 1.2 +A for 1 sec

$.1.1; No. of Runs se)ected n 8 #

7sc


10/16


ECC Division - EDRC


2076-LT-000-EL-DC-3059-00

TITLE:


!.0.0 T+ (4 L)

2.1.; 3a-in! in round

2.1.1 round Tem"erature 8 2:

2.1.# ,ariation in T'erma) Resisti(it- of Soi) 8 1:;

2.1.$ De"t' of 3a-in! 8 1 m

2.1.2 Hori0onta) formation= No. of Ca*)es and s"ace 8 2= $; cm

2.#.; 3aid in Air

2.#.1 Air Tem"erature 8 :;

2.#.# Hori0onta) formation


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ECC Division - EDRC


2076-LT-000-EL-DC-3059-00

TITLE:


8 ;.B 1 ;.@@ ;.#

Kd 8 ;.?#;1$?


12/16


ECC Division - EDRC


2076-LT-000-EL-DC-3059-00

TITLE:


?.#.; Ca)cu)ation of Deratin! factor for )a-in! in Air

Deratin! factor for Air Tem"erature A1 8 ;.@ Ta*

Deratin! factor for !rou"in! A# 8 ;.@?

O(er a)) deratin! factor for Air KAir 8 A1 A#

8 ;.@ ;.@?

KAir 8 ;.B?2

?.$.; Ca)cu)ation of Derated current carr-in! ca"acit-

Derated Current Carr-in! ca"acit- of Ca*)e in Air 8 A

8 B;; ;.B?2 A

8 ?@1 A

Derated Current Carr-in! ca"acit- of Ca*)e in round 8 A

8 :?: ;.?#;1A

8 $:; A

Derated Current Carr-in! ca"acit- of ca*)es se)ected 8 Minimum of round Air n

8 1$B# A

?.2.; Current Carr-in! ca"acit- required 8 3oad Current

3oad Current 8 S & Sqrt & , & Eff

8 #;;;;&1.$#&11&;.@

8 11?? A

S+ 38 / +),+ ,:) !8; ,:+ )


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ECC Division - EDRC


2076-LT-000-EL-DC-3059-00

TITLE:


Stead- state (o)ta!e dro" ,d 8 11??< ;.;;11:;.@;.;;#;.2$:B

8 #.:@;B: (

Percenta!e ,o)ta!e dro" ,D 8 ,d & , &1;;; & 1.$# F 1;;

8 #.:@;B:?:2;:2&11&1;;;&1.$#

8 ;.;1


14/16


ECC Division - EDRC


2076-LT-000-EL-DC-3059-00

TITLE:


A))o%ed (o)ta!e dro" 8 :

S+ 58 / +//+ ,:) 68; ,:+ ) SC 4it'stand Ca"a*i)it- 8 1!2. >A

6.6>VUE8?11>VE8C(+ @ 500 SC(+ C)


15/16


ECC Division - EDRC


2076-LT-000-EL-DC-3059-00

TITLE:



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txr to 11kv ais cab size

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