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