Electricity Forum Electricity Today Magazine Arc Flash Training
Intelligent Power Today Magazine
Archives

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...

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...

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 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...

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)...

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...
Home PQ & Grounding Power Quality

Power Quality

The Art of Ground Testing

Correcting the misconceptions of ground testing

BY JEFF JOWETT, Megger

Ground resistance testing is sometimes described as an “art”, and indeed something can be said for that description. Familiarity with the basic issues and common problems, however, can take much of the “art” out of it and put your testing program on a firm, repeatable basis.

BEGIN WITH THE CORRECT INSTRUMENTATION
Use a dedicated ground tester, an instrument that has separate current and potential circuits...

Power Quality Articles

INSULATION RESISTANCE TEST

T&D Buyer’s Guide Companies

Power Quality Videos

Discover Kinectrics

HVI Tan Delta Transducer Product Video - IEP Channel

OmniMax Ross Bridge Retrofit Case Study

Power Quality Products

Protector Relays

DDIN Grounded Helicopter Blocks

Spectrum Industries, Inc

Power Quality Shared Media

Catalog

Electrical Safety and Arc Flash Handbook Vol. 3

Catalog

Electricity Today T&D Magazine - SPECIAL SUBSTATION ISSUE

Catalog

Electrical Maintenance Handbook, Vol. 10