[amp_mcq option1=”good selectivity and reliability” option2=”economy and simplicity” option3=”high speed and selectivity” option4=”all of the above” correct=”option4″]
The correct answer is D. all of the above.
An efficient and a well designed protective relaying should have good selectivity and reliability, economy and simplicity, high speed and selectivity.
- Selectivity: The ability of a relay to distinguish between a fault on its protected circuit and faults on other circuits.
- Reliability: The ability of a relay to operate correctly when a fault occurs.
- Economy: The cost of the relay should be reasonable in relation to its benefits.
- Simplicity: The relay should be easy to understand and operate.
- High speed: The relay should operate quickly enough to clear a fault before it causes extensive damage.
All of these factors are important in the design of an efficient and well-designed protective relaying system.