Question
Download Solution PDFWhich of the following statements are true?
a) The electric power from 11 kV lines is delivered to distribution sub-station.
b) Distribution sub-stations are located near consumers localities.
c) Distribution sub-stations step down the voltage to 400 V(L-L).
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is option 2):((a), (b) and (c))
Concept:
- The distribution substations convert the High Voltage (HV) electricity into a low voltage one as required by the homes and businesses.
- In addition to voltage transformation, they also isolate faults and are used as a point of voltage regulation.
- The electric power from 11 kV lines is delivered to distribution sub-stations.
- These sub-stations are located near the consumers localities and step down the voltage to 400 V, 3-phase, 4-wire for supplying to the consumers.
- The voltage between any two phases is 400V and between any phase and neutral it is 230 V
- The 11kV lines are used in residential areas and is what feeds the local transformers, which then distributes power to the buildings in the area.
- 33kV lines on the other hand involve much higher voltages and are used to distribute power from one small sub-station to another.
Last updated on Jun 16, 2025
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