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System Design Principles

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Questions and Answers

What happens to current when voltage is reduced by a factor from high to low side in a transformer?

It becomes zero.
It remains the same.
It is reduced by the same factor.
It is multiplied by the same factor. (correct)

What type of losses do transformers experience when there is no current flow?

No-load losses (correct)
Iron losses
Load-related losses
Copper losses

What is the primary function of switches in a power system?

To regulate voltage
To step up or step down voltages
To detect electrical equipment failure
To vary the connection of lines (correct)

What is the primary function of protective equipment?

To detect electrical equipment failure and isolate the damaged equipment (B) Signup and view all the answers

What determines the load break capacity of a switch?

The current rating of the switch (A) Signup and view all the answers

What is critical for the proper function of protective equipment?

Precise calibration and assembly (C) Signup and view all the answers

What is the primary goal of supplying power using multiple sources in a system design?

To achieve maximum service continuity and reliability (C) Signup and view all the answers

What is the benefit of using short-time rated power circuit breakers in a system design?

To improve service continuity and reliability (C) Signup and view all the answers

What is a key aspect of designing an electrical system for maximum electrical efficiency?

Minimizing losses in conductors, transformers, and utilization equipment (A) Signup and view all the answers

What is the purpose of designing appropriate system alarms, monitoring, and diagnostics in a system design?

To detect and isolate faults quickly (B) Signup and view all the answers

What is the primary benefit of selecting high-quality electrical equipment in a system design?

To improve service continuity and reliability (D) Signup and view all the answers

What is a goal of designing a system with simpler electrical equipment?

To minimize maintenance costs (C) Signup and view all the answers

What is the primary function of tap changing transformers?

To regulate voltage levels in a power system (D) Signup and view all the answers

What is included in the capital cost of a substation?

Equipment costs, labor, and materials required to build the substation (A) Signup and view all the answers

What is the primary difference between capital costs and operating costs?

Capital costs are one-time expenditures, while operating costs are recurring expenses (A) Signup and view all the answers

What is the purpose of protective equipment in a power system?

To detect and isolate faults in the power system (B) Signup and view all the answers

What is the unit of measurement for transmission line costs?

Dollars per kVA-mile (C) Signup and view all the answers

What is the significance of equipment losses in a power system?

Equipment losses are significant and affect the overall efficiency of the power system (C) Signup and view all the answers

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