Tag Archives: Neutral

Can neutral currents, such as the 3rd harmonic, be reduced by the use of 3rd harmonic blocking filters?

Published by Mirus International Inc., [2010-01-08] MIRUS-FAQ001-B2, FAQ’s Harmonic Mitigating Transformers, 31 Sun Pac Blvd., Brampton, Ontario, Canada. L6S 5P6. Some manufacturers are promoting the use of 3rd harmonic (180 Hz) blocking filters for the treatment of high neutral currents caused by non-linear loads such as personal computers. These devices are parallel L-C filters tunedContinue reading “Can neutral currents, such as the 3rd harmonic, be reduced by the use of 3rd harmonic blocking filters?”

Why do 3rd harmonic currents overload neutral conductors?

Published by Mirus International Inc., [2010-01-08] MIRUS-FAQ001-B2, FAQ’s Harmonic Mitigating Transformers, 31 Sun Pac Blvd., Brampton, Ontario, Canada. L6S 5P6. Figure 7-1 shows how the sinusoidal currents on the phases of a 3-phase, 4-wire system with linear loads sum to return on the neutral conductor. The 120° phase shift between the sinusoidal load currents causesContinue reading “Why do 3rd harmonic currents overload neutral conductors?”

Calculate Neutral Current in Dran-View 7

Published By Terry Chandler, Director of Engineering, Power Quality Thailand LTD/Power Quality Inc., USA. March 2021. Emails: terryc@powerquality.org, terryc@powerquality.co.th Application note to calculate neutral current in DV7 or manually from RMS values manually and automatically with DV7 Enterprise math channels! The neutral current in a three-phase, four-wire wye system represents the imbalance of the three-phase conductors, also knownContinue reading “Calculate Neutral Current in Dran-View 7”