‫ﺍﻟﺸـﺭﻜﺔ ﺍﻟﺴـﻌﻭﺩﻴﺔ ﻟﻠﻜﻬﺭﺒﺎﺀ‬
Saudi Electricity Company
DPS ( March 2004 )
Page 48 of 90
Distribution Planning Standard
may differ from those of package unit substations, but the ratings are
similar.
( c ) Pole Mounted Transformers:
The standard distribution substation for overhead system is a polemounted transformer with secondary LV Distribution Cabinet. These
are commonly used in rural areas where loads are located
scatteredly.
Sizes & Characteristics of the available Transformer units are as
follows.
Under Ground
3.7.2
Over Head
Voltage Ratio
Size
L.V
Feeder
Size
L.V Feeder
300
4
50
2
500
8
100
4
1000
12
200
4
1500
16
300
4
33/.23, 33/.4 KV or
13.8/.23, 13.8/.4 KV
33/.23, 33/.4 KV or
13.8/.23, 13.8/.4 KV
33/.23, 33/.4 KV or
13.8/.23, 13.8/.4 KV
13.8/.23, 13.8/.4 KV
Loading of Distribution Substations:
The Maximum Load (MDL) of the Distribution Transformers must not
exceed more than 100% of its nameplate rating. When the actual load
reach the 80% rating of the transformer, reinforcement of the network shall
be planned.
3.7.3
Sites of Distribution Substation
( a ) For area electrification SEC will negotiate with the developer and/or
the local Municipality for the land and locations required for
substations as follows:
ssm