Certified Data Centre Professional (CDCP) Practice Exam

When dealing with high harmonics in a 3-phase 5-wire power supply, it is crucial to mitigate their impact on the system to ensure operational efficiency and equipment longevity. The appropriate response is to use harmonic filters.

Harmonic filters are specifically designed to reduce unwanted frequencies generated by non-linear loads. These filters can be passive or active and work by either shunting the harmonic currents away from the supply or by actively compensating for them. Implementing harmonic filters effectively improves power quality by diminishing harmonic distortion, which in turn protects sensitive equipment from overheating and potential failure.

The other options—while they may appear relevant to addressing electrical issues—do not directly tackle the problem of high harmonics. Reducing the load does not necessarily alter the harmonic content in the system; while it may lower overall power consumption, it doesn’t specifically address the harmonics generated by existing non-linear loads. Doubling the size of the neutral conductor may help manage current flow better, but it won’t effectively eliminate harmonics. Isolating the power supply could potentially prevent disturbances from affecting connected loads, but again, it does not address the fundamental issue of harmonic generation and distortion.