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Power Quality & Grounding

Understanding the DC Overpotential Test

The 411 on DC testing of low-voltage circuit breakers BY JIM WHITE, Shermco Industries, Inc. The direct current (DC) overpotential test is one of the basic tests conducted to ensure an insulation system has adequate insulation life to make it to the next scheduled maintenance interval. While not...

Wireless Measurement Systems

Conquering challenges with wireless measurement systems BY COLIN PLASTOW, Fluke Electronics Any type of manufacturing or industrial environment presents a number of challenges when taking measurements. Whether you need to check performance over time or run spot checks, there are many situations...

Reducing Electrical Risks in Data Centers

Industrial-strength solutions to improve safety BY MIETEK GLINKOWSKI, ABB A major source of disruption and downtime in data centers is human error. And their largest safety hazard is in the increasing size of the electrical systems that power them. Both of these risks can be addressed at two...

How to Protect Data Centers

Exploring power flow and heat transfer technologies BY BRIAN FORTENBERY, Electric Power Research Institute A data center is a large concentrated load about 20 times more energy-intensive than the typical commercial building and 80 to 100 times more energy-intensive than the typical home. They...

Solving Power Quality Troubles in VFDs

Q: What are some of the negative power quality impacts from voltage variances and transients on variable frequency drives (VFDs)? And, what are some recommended solutions to resolve this VFD site issue? OUR EXPERT | Paul Wright, P.Eng, engineered drive solutions manager, Electrical Controls...

How to improve your NEC/CSA Installations

Grounding and Bonding are the least understood, the most misinterpreted and confusing elements in modern electrical and electronic systems and leads to poor design and installation work — especially as it relates to the Canadian Electrical Code (CEC) and to the National Electrical Code (NEC)...
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Power Quality

Electrical Grounding and the Weather

How resistance testing is affected by the elements

BY JEFF JOWETT, Megger

Ground resistance testing is affected by the weather as much as any common electrical test—and sometimes even more so. Both the instrument and the test item are affected. With ground resistance testing, the test item is not so readily managed as a motor or electrical circuit which can be dried, cleaned, placed in a controlled environment or some other adaptation to accommodate easy...

Power Quality Articles

INSULATION RESISTANCE TEST

T&D Buyer’s Guide Companies

Power Quality Videos

Transformer Failures Relevant to Protective Relaying and Transformer Diagnostic Testing

Bushing Monitoring: What's the Difference Between Sum of Currents and Voltage Reference

Congeal and Seal - How Albarrie's Unique Polymer Blend Reacts To Hydrocarbons

Power Quality Products

DDIN Midsize Clipping Hook

RUBBER GOODS

STANDALONE OLTC EVENT RECORDER - OTM-X

Power Quality Shared Media

Catalog

Electricity Today T&D Magazine - HV ELECTRICAL TESTING Special Issue

Catalog

Electricity Today T&D Magazine - Electrical Power Transformers Special Edition

Catalog

Electric Motors and Variable Frequency Drives Handbook Vol. 4