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6.1.5. Harmonics limitation

Power supply equipment, both linear and switched, draw pulse current (see fig. 38) owing to the capacitors being charged. This waveform consists of a series of harmonics and a fundamental wave which with a frequency that equals the main frequency. Limiting the harmonics requires the power supply to have a power consumption with a limited band width which will result in a high power factor.

Figure 38

Figure 38