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