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