What are the three types of distribution systems?

What are the three types of distribution systems?

• A. Radial
• B. Network
• C. Radial, Network, and Loop
• D. Loop

Answer: (C)

Power distribution configurations come in a few standard forms, and each has its own impact on reliability and how faults are managed. The three common configurations are radial, loop, and network. In a radial system, there’s a single path from the substation to each customer, so a fault cuts power to everything beyond that point until the fault is cleared. It’s simple and cost-effective but has limited redundancy. In a loop system, feeders form a closed ring, giving multiple directions for power to reach a load; this provides an alternate path if one section faults, helping restore service quickly through switching. In a network system, many feeders are interconnected in a grid-like pattern, offering multiple parallel paths between sources and loads and enabling the highest level of reliability and load balancing. Because this set includes all three configurations, it’s the most complete answer.

Power distribution configurations come in a few standard forms, and each has its own impact on reliability and how faults are managed. The three common configurations are radial, loop, and network. In a radial system, there’s a single path from the substation to each customer, so a fault cuts power to everything beyond that point until the fault is cleared. It’s simple and cost-effective but has limited redundancy. In a loop system, feeders form a closed ring, giving multiple directions for power to reach a load; this provides an alternate path if one section faults, helping restore service quickly through switching. In a network system, many feeders are interconnected in a grid-like pattern, offering multiple parallel paths between sources and loads and enabling the highest level of reliability and load balancing. Because this set includes all three configurations, it’s the most complete answer.