Which of the following is not a reason for providing power routing alternatives in a switchyard?

• A. isolating faults
• B. transferring loads
• C. routing current through a power transformer
• D. isolating components for maintenance

Answer: (C)

The main idea is that switchyard routing options exist to keep power flowing safely and reliably by changing the path of power when needed. Having multiple routes lets you isolate problems without shutting everything down, move loads away from overloaded or faulty sections, and take equipment out of service for maintenance without interrupting service to other parts of the system.

Routing current through a power transformer isn’t about creating an alternative path for reliability. A transformer’s role is to change voltage levels as part of normal operation, and it isn’t a controllable method for providing different power paths. The other situations—isolating faults, transferring loads, and isolating components for maintenance—are the true reasons for having switchyard routing options.