Q3. A three-phase ring main distributor system ABCDE, the system has long of1200m and fed from point A by 230/ 20° V. The system is loaded as follows:50A, 0.6 P. F. lagging, 200m from point A.80A, 0.8 P. F. lagging, 500m from point A.100A, 0.7 P. F. lagging, 800m from point A.60A, U.P.F., 1000m from point A.If the total impedance of the distributor is (0.1+j0.1) 2, calculate the current ineach section and the voltage at points C and E.

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Answered: Q3. A three-phase ring main distributor…

Engineering

Electrical Engineering

Q3. A three-phase ring main distributor system ABCDE, the system has long of

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter3: Power Transformers

Section: Chapter Questions

Problem 3.41P: Consider the single-line diagram of the power system shown in Figure 3.38. Equipment ratings are...

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Concept explainers

Distribution System

The final stage in the delivery of the electric power is the electric power distribution system. From the transmission system to the individual customers it carries electricity. The distribution system is connected with the transmission system and is used to lower the voltage of the transmission to medium voltage in the range of 2 kV to 35 kV with the help of transformers. This medium voltage to the distribution transformers located near the customer's premises is carried by the primary distribution system lines. These distribution transformers in turn lower the voltage to utilization voltage used in lightings, household appliances, industrial equipments etc. Through secondary distribution lines often several customers are supplied from one transformer. It is through service drops, the commercial and residential customers are connected to the secondary distribution system lines. Customers who demand a larger amount of power can be connected directly to the primary distribution system level or the sub-transmission level.

Question

Q3. A three-phase ring main distributor system ABCDE, the system has long of
1200m and fed from point A by 230/ 20° V. The system is loaded as follows:
50A, 0.6 P. F. lagging, 200m from point A.
80A, 0.8 P. F. lagging, 500m from point A.
100A, 0.7 P. F. lagging, 800m from point A.
60A, U.P.F., 1000m from point A.
If the total impedance of the distributor is (0.1+j0.1) 2, calculate the current in
each section and the voltage at points C and E.

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