Protective relays are devices that detect abnormal conditions in electrical circuits by measuring________?
Aconstantly the electrical quantities which differ during normal and abnormal conditions
Bvoltage during abnormal condition
Cnone of the above
Dcurrent during abnormal condition
Correct answer
A. constantly the electrical quantities which differ during normal and abnormal conditions
Explanation
The correct answer is constantly the electrical quantities which differ during normal and abnormal conditions.