Question 21.3: An AC oil-filled capacitor has a voltage rating of 300 WVDC.......

Delmar’s Standard Textbook of Electricity [1086295]

An AC oil-filled capacitor has a voltage rating of 300 WVDC. Will the voltage rating of the capacitor be exceeded if the capacitor is connected to a 240-V, 60-Hz line?

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The DC voltage rating of the capacitor indicates the peak value of voltage. To determine if the voltage rating will be exceeded, find the peak value of 240 V by multiplying by 1.414:

Peak = 240 V × 1.414
Peak = 339.36 V

The answer is that the capacitor voltage rating will be exceeded.

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