A 3-phase, 4-wire, wye-connected power system may require what consideration for the neutral conductor?

In a 3-phase, 4-wire, wye-connected power system, it's essential to consider high harmonic neutral currents when discussing the neutral conductor. This is because non-linear loads, such as computers, LED lighting, and various electronic devices, can generate harmonics in the system. Harmonics are currents that operate at integer multiples of the fundamental frequency, which can lead to an increase in the overall current in the neutral conductor.

In a balanced system, ideally, the phase currents would cancel each other out in the neutral, resulting in a neutral current close to zero under standard conditions. However, when non-linear loads are introduced, the current in the neutral becomes significantly higher due to these harmonics. This may lead to overheating, increased losses, and potential failure of the neutral conductor if it is not adequately sized to handle these additional currents.

Therefore, understanding and preparing for high harmonic neutral currents is crucial in designing and maintaining a safe and efficient electrical system. This consideration helps electricians and engineers ensure that the neutral conductor is properly rated and capable of handling the unique challenges posed by modern electrical loads.