In a short circuit test on a circuit breaker, the following readings were observed on a single frequency transient time to reach the peak recovery voltage is 40 μ sec and the peak restriking voltage is 100 kV.
Which of the following statements is/are true?1
Average RRRV is 5000 V/μsec
2
The natural frequency of oscillations is 25 kHz
3
Average RRRV is 2500 V/μsec
4
The natural frequency of oscillations 12.5 kHz