Please refer the given table for cable sixe Nominal area ofconductor in sq.mm.7095120150185240300Nominal areain sq. mm.610162535507095120150185225240300400500625Maximum Continuous Current RatingIn Ground amps. In Duct amps150130170150200180240220265245320275360• 320Number andnominaldiameter ofwires in mm1/2.801/3.557/1.707/2.247/2.5019/1.8019/2.2419/2.5037/2.0637/2.2437/2.5037/2.8037/3.0061/2.5061/3.0091/2.6591/3.00Maximum allow.able resistanceper km. at 20°Cfor single corecables in ohms4.7592.9601.8761.0800.86750.61760.39880.32010.24230.20490.16450.13110.11420.099790.069300.059600.04645In Air amps.125140165200215255290Maximum allowableresistance per km. at20°C for twin and multi-core cables in ohms4.8513.0181.9121.1020.88430.62990.40680.32630.24700.20880.16770.13370.11650.10700.07069 A 33 KV substation is to be connected to a 11 KVstepdown substation which is at a distance of 1.5 km by c under-ground cable. If the size of the transformer in the stepdown substationis 500 KVA, determine the size of the cable.

We have Transmission line which connects 33 KV Sub-Station to 11 KV Substation. This line is 1.5 KM…

A 33 KV substation is to be connected to a 11 KV stepdown substation which is at a distance of 1.5 km by c under- ground cable. If the size of the transformer in the stepdown substation is 500 KVA, determine the size of the cable.

A 33 KV substation is to be connected to a 11 KV stepdown substation which is at a distance of 1.5 km by c under- ground cable. If the size of the transformer in the stepdown substation is 500 KVA, determine the size of the cable.

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Concept explainers

Transmission Line Parameters

The performance of a power system is mostly determined by the producing stations and transmission lines in the system which can be studied with the help of transmission line parameters.

Question

Please refer the given table for cable sixe

Nominal area of
conductor in sq.
mm.
70
95
120
150
185
240
300
Nominal area
in sq. mm.
6
10
16
25
35
50
70
95
120
150
185
225
240
300
400
500
625
Maximum Continuous Current Rating
In Ground amps. In Duct amps
150
130
170
150
200
180
240
220
265
245
320
275
360
• 320
Number and
nominal
diameter of
wires in mm
1/2.80
1/3.55
7/1.70
7/2.24
7/2.50
19/1.80
19/2.24
19/2.50
37/2.06
37/2.24
37/2.50
37/2.80
37/3.00
61/2.50
61/3.00
91/2.65
91/3.00
Maximum allow.
able resistance
per km. at 20°C
for single core
cables in ohms
4.759
2.960
1.876
1.080
0.8675
0.6176
0.3988
0.3201
0.2423
0.2049
0.1645
0.1311
0.1142
0.09979
0.06930
0.05960
0.04645
In Air amps.
125
140
165
200
215
255
290
Maximum allowable
resistance per km. at
20°C for twin and multi-
core cables in ohms
4.851
3.018
1.912
1.102
0.8843
0.6299
0.4068
0.3263
0.2470
0.2088
0.1677
0.1337
0.1165
0.1070
0.07069

A 33 KV substation is to be connected to a 11 KV
stepdown substation which is at a distance of 1.5 km by c under-
ground cable. If the size of the transformer in the stepdown substation
is 500 KVA, determine the size of the cable.

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