- 2077 Chaitra · 4 marks
T/F: loop arrangement in urban area economical
Short answer
TRUE. Loop feeders require extra conductor and switches; in urban areas, high load density and short distances to close the loop result in low cost per kW served, while improved reliability and voltage regulation justify the investment. In rural areas, long distances for few loads make loops uneconomical.
State and justify whether the following statement is TRUE or FALSE: The loop arrangement of distribution feeder in urban area is relatively economical than rural area.
TRUE.
A loop (ring) feeder needs extra conductor to close the ring and extra switches to sectionalize it. Its cost is justified by the load it serves and the reliability it adds.
- Urban area: the load density is high and the load points are close together, so the extra length needed to close the loop is short. The added cost per kW served is small. Urban consumers (commercial, hospitals, offices) also lose a lot from outages, and the loop reduces outage time and losses (current flows from both sides, so the voltage drop is lower). The extra cost is therefore quickly recovered.
- Rural area: the loads are small and scattered over long distances. Closing a loop may need many extra km of line for a few kW of load, so the cost per kW is very high. The value of the energy saved from shorter outages is low. A simple radial feeder is more economical there.
| Point | Urban | Rural |
|---|---|---|
| Load density | High | Low |
| Extra length to close the loop | Short | Long |
| Cost per kW of the loop | Low | High |
| Value of reliability | High | Low |
So the loop arrangement is relatively more economical in urban areas than in rural areas.
✓ Answer checked by Claude Opus 5.5 (high effort)
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