Yearly Archives: 2021

How do Harmonic Mitigating Transformers reduce voltage distortion?

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. Delta-wye transformers, even those with a high K-factor rating, generally present high impedance to the flow of harmonic currents created by the non-linear loads. Question 8 showed that the non-linear loads are current sources thatContinue reading “How do Harmonic Mitigating Transformers reduce voltage distortion?”

What is Soil Resistivity Test and How is the Testing Done

Published by Carelabs, Carelabs is authorized provider of Electrical Installation’s Study, Analysis, Inspection, and Certification services in UAE, and offer voltage drop study and analysis services. Website: carelabz.com The resistance of an earth electrode is related to the resistivity of the soil in which it is placed and driven, and thus soil resistivity calculations and measurements isContinue reading “What is Soil Resistivity Test and How is the Testing Done”

Reactive Power Compensation in Distribution System – Changing Paradigm 

Published By M.L.Sachdeva, Former Chief Engineer, CEA & N.S.Sodha, Former Executive Director, PowerGrid. Conference on ‘Reliable & Quality Power’ on 30-31st May 2019 CBIP Conference Hall, New Delhi. Synopsis Reactive power compensation technologies inhibited in the Distribution system as also Power system of the Present (Conventional) and Power System of Future (Up-front Conventional cum  Renewable ResourcesContinue reading “Reactive Power Compensation in Distribution System – Changing Paradigm “

What are zero sequence harmonic filters and how do they reduce 3rd harmonic currents and prevent neutral conductor overheating?

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. Zero sequence currents, in simple terms, are those found in the neutral conductor. They include the unbalanced 60 Hz currents and the 3rd, 9th, 15th and other triplen harmonic currents. Zero sequence currents appear inContinue reading “What are zero sequence harmonic filters and how do they reduce 3rd harmonic currents and prevent neutral conductor overheating?”

Paralleling Dissimilar Generators: Part 2 – Compatible Alternators

Published by By Gary Olson, Director of Technical Support, Cummins Power Generation, Power topic #9016 | Technical information from Cummins Power Generation – White Paper Paralleled alternators are compatible if they can operate in parallel without having damaging or disruptive neutral currents flowing between them. The magnitude of neutral current flow related to the dissimilarityContinue reading “Paralleling Dissimilar Generators: Part 2 – Compatible Alternators”

Technical Paper: Semiconductor Equipment Voltage Sag Immunity Improvements

This Technical Paper Written by: Mark Stephens, P.E. Engineering Manager, EPRI PEAC Corporation, Semiconductor & Industrial PQ Group, EPRI PEAC Corporation, 942 Corridor Park Boulevard Knoxville, Tennessee 37932, Phone: (865)-218-8022, Fax: (865)-218-8001 mstephens@epri-peac.com, http://www.f47testing.com, June 13th, 2002 Introduction The end of the report read…“…Imagine a time in the not so distant future when the industryContinue reading “Technical Paper: Semiconductor Equipment Voltage Sag Immunity Improvements”

Sags and Swells

Published by Richard P. Bingham, Manager of Technology and Products, Dranetz – BMI, 1000 New Durham Road, Edison, NJ 08818-4019, Phone 732-248-4393, Fax 732-287-8320. February 16, 1998 ABSTRACT Sags and swells are the most common types of power quality disturbances. Millions of dollars are lost in productivity each year in the United States due toContinue reading “Sags and Swells”

What is Voltage Drop Study and Analysis

Published by Carelabs, Carelabs is authorized provider of Electrical Installation’s Study, Analysis, Inspection, and Certification services in UAE, and offer voltage drop study and analysis services. Website: carelabz.com Dynamic voltage (IR) drop, in contrast to the static voltage drop depends on the switching activity of the design, and hence it is vector dependent. Designing an ideal powerContinue reading “What is Voltage Drop Study and Analysis”

How do harmonics increase power losses and overheat transformers?

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. Harmonics generated by non-linear loads substantially increase the losses in conventional or K-rated delta-wye distribution transformers. This increase in losses will increase operating costs and can shorten transformer life. The main thrust of the K-ratedContinue reading “How do harmonics increase power losses and overheat transformers?”