The zone electric system contains how many protected zones?

• A. 4 protected zones
• B. 5 protected zones
• C. 6 protected zones
• D. 7 protected zones

Answer: (C)

The main idea here is that an electrical protection scheme is built by splitting the system into separate protected zones so faults are contained and don’t cascade across the entire setup. Each zone has protective devices and logic to detect a problem and isolate just that zone, allowing the rest of the system to keep operating.

In this design, there are six protected zones. This arrangement provides sufficient fault containment and maintains essential services by preventing a fault in one area from affecting others. It also keeps protection manageable and cost-effective—not so few that a fault could spread easily, and not so many that the system becomes unnecessarily complex.