Historically, typical loads of commercial power systems have been predominately linear; however, in the last few decades, a significant portion of these...More
Today, many facilities have online monitoring systems that continuously track power quality, provide valuable information about energy use, and characterize...More
According to the IEEE Buff Book, "A power cable must be protected from overheating due to excessive short-circuit current flowing in its conductor," which may damage or destroy the insulation....More
In certain instances, system operation problems can be cyclical, many times correlating with utility or facility power system operation. Other times,...More
Surge protective devices (SPDs) have become an integral part of residential, commercial, and industrial power quality applications. The best SPDs provide...More
The use of surge protective devices (SPDs) within residential, commercial, and industrial applications has sharply increased over the last decade...More
If you've ever wondered how surge protector strips are different from plug-in power conditioners, you're not alone. The enormous difference in price makes...More
The power quality industry has developed certain index values that help us assess the quality of service as it relates to distortion caused by the presence...More
Ground fault circuit breaker problems look simple on the surface: Too much current and bang, breakers trip. And when they trip, everyone pays attention....More
Surge protector Strikesorb surge protection devices (SPDs) meet the requirements of the international IEC 61643-1 standard as well as the 2007 UL-1449...More
We all know that electric utilities in the United States generate electricity at various 60-Hz voltage levels that result in a sine wave waveform. The...More
There's abundant information about the sizing and application of large UPS systems; small commodity UPS systems, on the other hand, are a different story...More
Reliable operation of security systems is obviously essential to protect company assets and ensure human safety. However, episodic equipment malfunctions...More
No electricity provider in the world can guarantee an electrical supply that is free from voltage and frequency variations. The possibility of faults...More
Have you just spent another day at the office fighting with computers? Join the club. Besides viruses, malware, and software, is it possible that something...More
Confusion continues to surround the use, performance, and NEC requirements of isolated ground (IG) wiring. Can it be used anywhere, or is it restricted...More
In Part 2 of this article (August 2007), we described multipoint (or common-type) supplemental grounding and bonding between the T(M)GB [notation used...More
In Part 1 of this article (July 2007), we described (per the Emerald Book and ANSI J-STD-07-A) supplemental grounding and bonding from the grounding electrode...More
Site power and grounding audits/evaluations of commercial and industrial locations routinely identify electrical power system grounding and bonding problems....More
No harmonic mitigation solution is ideal for every application. So, once you or your client decides to reduce harmonic distortion on a facility electrical...More
With each passing year, our society's reliance on an unlimited supply of electric power continues to increase. The availability of this continuous power...More
Although it's one of the most important aspects of electrical design and installation, grounding continues to be one of the least understood and most...More
Lurking in the shadows of even the most unsuspecting operations from corporate to commercial to industrial facilities is a condition known as poor voltage...More
LEDs have unique and compelling characteristics that make them ideal for industrial lighting applications. But there are a variety of misconceptions about LEDs, how well they work, how long they last, and more. Digital Lumens developed this whitepaper to dish up the facts around LEDs and address some common misunderstandings....More
An arc flash is associated with the explosive release of energy caused by an electrical arc, due to either a phase-to-ground or a phase-to-phase fault. This kind of fault can result from many factors – a dropped tool, accidental contact with electrical systems, buildup of conductive dust, corrosion or improper work conditions.....More
Abstract: In this webinar, Mike will not only explain the current NEC requirements for GFCIs and AFCIs, but he'll explain how they operate, what causes their premature failure, and when they won't provide the safety protection you might have thought they would.
Abstract: This webinar will teach attendees the difference between risk and hazard, and how the choice of system grounding has a direct impact on reliability and safety.
See side-by-side comparisons of different flame resistant fabrics exposed to flash fires, illustrating the extent, severity and location of burns....More
