R. Fehr

Harmonics Made Simple 2
Just because harmonics is becoming a more prevalent problem, that doesn't mean the subject is getting any easier to understand
The Trouble With Capacitors Part 2
Here's how to reduce the effect of capacitor switching on your power system
The Trouble With Capacitors Part 1
Although shunt capacitors offer several advantages at all voltage levels, those advantages come at a price ...
The Basics of Ladder Logic
Ladder logic is the basis of most control functions
Meter Basics
Meters are indispensable when working with electrical systems
The Basics of AC Motors 1
Powering industry since replacing the steam engine
The Basics of Transformers
By raising and lowering voltage levels, transformers make power systems versatile
The Basics of Parallel Circuits
Components in parallel share current, but not necessarily equally.
The Basics of Power Factor and Efficiency
You don't always get what you pay for
The Basics of Capacitance
Last month's column explained that AC current flowing through an inductance reaches its peak amplitude after the voltage. Lagging current is characteristic
The Basics of Inductance 1
Inductance is the link between electric circuits and magnetic fields.
AC Fundamentals
Alternating current circuits improve the versatility and usefulness of electric power systems
Electrical Testing Feed

EC&M Webinars
Jul 21, 2015

ON DEMAND: Mitigation Methods for Arc Flash Hazards - Enhancing Personal Safety

The energy released during an arc flash event can result in severe damage to personnel, equipment, and property. While there are solutions which seek to improve the protection for each, this program will focus on personnel....More
Jul 14, 2015

ON DEMAND: Understanding the 2015 Edition of NFPA 70E and the Arc Flash Hazard

Get more information on the important changes to the 2015 edition of NFPA 70E. More specifically, this event will address hazard analysis and FR clothing performance testing, focusing on the quantification of incident energy and ATPV (or Arc Rating)....More
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