Question 5
- (a)State three advantages of a ring distribution system of electrical supply.
- (b)State the two operating voltage levels for a transmission line
Observation
The expected answers were;
- (a) Advantages of a ring distribution system of electrical supply
(i) Can use smaller supply cables than a radial distribution system.
(ii) Offers greater security of supply than a radial distribution.
(iii) more reliable
(iv) more efficient
(b) Operating Voltages
(i) 132 kV
(ii) 330 kV
Candidates did not perform well in this question.