The Restraining Voltage

The restraining voltage in electrical engineering refers to the voltage at which a protective device or circuit limits or restricts the voltage across a particular component or system. It is an important parameter in ensuring the safe and reliable operation of electrical equipment and preventing damage due to excessive voltage.

Measurement in Peak Value

The correct answer to the given question is option B, which states that the restraining voltage is measured in peak value. Let's understand why this is the case.

- RMS Value: The RMS (Root Mean Square) value of a voltage waveform is a measure of its effective value or equivalent DC value. It is calculated by taking the square root of the average of the squares of the instantaneous values of the waveform. However, the restraining voltage is not measured in terms of RMS value.

- Instantaneous Value: The instantaneous value of a voltage waveform represents the voltage at a particular point in time. It is the value of the voltage waveform at any given instant. While the instantaneous value is important for analyzing the behavior of voltage waveforms, it is not the appropriate measurement for the restraining voltage.

- Average Value: The average value of a voltage waveform is the average of all the instantaneous values of the waveform over a complete cycle. It is calculated by dividing the sum of all the instantaneous values by the total number of values. However, the restraining voltage is not measured in terms of average value.

- Peak Value: The peak value of a voltage waveform represents the maximum value attained by the waveform during one complete cycle. It is the highest point or peak of the waveform. The restraining voltage is measured in terms of peak value because it is important to determine the maximum voltage that a protective device or circuit can withstand without causing damage.

Conclusion

In conclusion, the restraining voltage is measured in peak value. This measurement allows engineers and technicians to determine the maximum voltage that a protective device or circuit can handle and ensure the safe operation of electrical equipment. The peak value represents the highest point or maximum value attained by the voltage waveform during one complete cycle.