Question

A 2-wire d.c. distributor AB is 300 metres long. The end A is fed at 205 V and end B at 200 V. The
distributor is uniformly loaded at 0·15 A/metre length and has concentrated loads of 50 A, 60 A and
40 A at points distant 75, 175, 225 m respectively from the end A. The resistance of each conductor
is 0·15 Ω per kilometre. Calculate :
(i) the point of minimum potential
(ii) currents fed at ends A and B

Answer 1

Answer:

TUTORIAL PROBLEMS A 2-wire d.c. distributor AB. 1000 m long has a total resistance of 0.1 ?. The ends A and B are fed at 240 V. The distributor is uniformly loaded at 0.5 A/metre length and has concentrated loads of 120 A, 60 1. A, 100 A and 40 A at points distant 200, 400, 700 and 900 m respectively from end A. Calculate (1) the point of minimum potential (ii) value of minimum potential [(i) 400 m from A (ii) 231.76 V (iii) I,-366 A : 1R = 454 Al 2. A 2-wire d.c. distributor AB is 300 metres long. The end.A 1s fed at 205 V and end B at 200 V. TIe distributor is uniformly loaded at 0.15 A/metre length and has concentrated loads of 50 A, 60 A and 40 A at points distant 75, 175, 225 m respectively from the end A. The resistance of each conductor (iii) current fed at both ends is 0-15 ? per kilometre. calculate : (7) the point of minimum potential (ii) currents fed at ends A and B [(i) 175 m from A (ii) I,-150 A ; 1, 45 A] A d.?. 2-wire distributor AB is 450 m long and is fed at both ends at 250 V. The distributor is loaded as shown in Fig. 13.35. The resistance of each conductor is 005 ? per km. Find the point of minimum [261 74 m from A; 247-35 V] 3. potential and its potential 250 V 250 V E 1.5A?m 60 m 250 m