Briefly describe how and why generate three-phase supply
compared single-phase supply. Environmentalists often say that steel transmission towers are a
‘blot the landscape’. State the reasons for balancing single-phase loads across three-
phase supply. Why continue use steel towers for
transmission the National Grid network?
14. State the meaning ‘polyphase supply system’.
16. What are the advantages connecting three-phase supply:
a. State the standard voltages used for generation, transmission and
distribution the United Kingdom.11.
12.
. delta
b. star.
17.
13. Why the distribution from local sub-stations end users, for the
most part, underground cables the United Kingdom?
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