Which type of power problem is shown in the exhibit?

The correct answer is A. DC offset. DC offset occurs when an AC waveform is shifted above or below the zero-volt baseline, meaning the wave no longer crosses zero symmetrically - one half-cycle is larger than the other, which is what the exhibit illustrates. Interruption (B) is incorrect because that would show a…

Power Systems in the Data Center

Question

Which type of power problem is shown in the exhibit?

Options

ADC offset
BInterruption
CUndervoltage
DHarmonic distortion

How the community answered

(23 responses)

A
83% (19)
B
9% (2)
C
4% (1)
D
4% (1)

Explanation

DC offset occurs when an AC waveform is shifted above or below the zero-volt baseline, meaning the wave no longer crosses zero symmetrically - one half-cycle is larger than the other, which is what the exhibit illustrates. Interruption (B) is incorrect because that would show a complete or near-complete loss of voltage, not a shifted waveform. Undervoltage (C) is incorrect because it describes a reduced but still symmetrical amplitude, not a baseline shift. Harmonic distortion (D) is incorrect because it refers to a distorted, non-sinusoidal wave shape caused by additional frequency components, not a vertical shift of the waveform.

Memory tip: Think of DC offset as the waveform being "pushed off center" - the zero line is no longer in the middle of the wave.

Topics

#DC offset#power quality#waveform analysis

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