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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 40 usec and the peak restriking voltage 100 kV. Determine the average RRRV and the frequency of oscillations.

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 40 usec and the peak restriking voltage 100 kV. Determine the average RRRV and the frequency of oscillations.

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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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 40 usec and the peak restriking voltage 100 kV. Determine the average RRRV and the frequency of oscillations.
Transcribed Image Text: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 40 usec and the peak restriking voltage 100 kV. Determine the average RRRV and the frequency of oscillations.
Expert Solution
Step 1

We have been given data of a short circuit test on the circuit breaker and the following readings were observed ,

 

Time to reach the peak = 40 μSec = 40 * 10-6 Sec

Peak Restriking voltage = 100 KV = 100 * 103 V

 

We have been asked to determine the value of,

 

  • Average RRRV
  • Frequency of oscillations

 

For average RRRV we have,

 

Average RRRV = Peak restriking voltageTime to reach the peak

 

And,

Frequency of oscillation is given by,

Frequency of oscillation (fn) = 12 * tm

 

where,

tm = Time to reach the peak

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