In today’s digital driven world, current in a neutral conductor is one of common problem faced by the electrical engineers in most of the commercial buildings, hospitals, IT/ITeS sector.
In present load scenario of switch mode power supply (SMPS), even though loads are 100% balanced, current in the neutral conductor could be more than the phase conductor. In case of linear loads, for a three phase system current in the neutral conductor flows due to unbalance of loads in the three phases. However, in case of non linear loads, current in the neutral conductor is not only a function of unbalancing in the load but also harmonic current generated by the load. In SMPS loads like computers, UPS, electronics etc. triplen harmonics are major component of total harmonics generated. Triplen harmonics have a tendency to flow in the neutral of the conductor, thus giving rise to neutral current in the system.
pManifold, National Support Network (NSN) partner of APQI recently interviewed Dr. V. R. Kanetkar, Consultant, Emerson Network India an industry expert, to understand his uptake on ‘Protection and Operational Reliability Improvement Using Line/Neutral Inductances and Neutral Current Compensator’. (The views here are personal and not to be associated with any company in any forms.)