TECHINCAL REQUIREMENT
3-1 System Data
a- 33 KV system
Nominal voltage 33000 volts
Highest system voltage 36000 volts
System 3- phase , 3 wire ,50Hz
Short circuit level 25 KA r.m.s at 33000 volts
b- 11 KV system
Nominal voltage 11000 volts
Highest system voltage 12000 volts
System 3-phase,3 wire with neutral earthed through an earthing resistance
of 21.1 ohm to limit earth fault current to 300Amps.
Short circuit level 25 KA r.m.s at 11000 volts
c-L.T.System
Nominal voltage 400 volts + 6%, -10%
System 3- phase, 4 wire with neutral solidly earthed
Short circuit level 35 KA r.m.s at 400 volts
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