| | | | | | Renewable energy generators with power-electronic switched-mode generators are a newer technology that has the possibility to generate harmonics in even higher frequencies than traditionally experienced — in some cases from the 35th to the 2,500th harmonic (2 kHz to 150 kHz), which are termed “supraharmonics.” Will these high-frequency harmonics be... |
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| | Advertisement | With a focus on electrical products and services, the Facilities Expo ties together all aspects of facilities engineering, MRO, and green buildings. Register for free to explore our solution packed exhibitor floor, learn from industry experts, and network! |
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| | | In Episode 22 of “EC&M Asks,” a video series featuring subject matter experts (SMEs) answering reader-submitted questions regarding popular electrical topics, Ron Widup, vice chairman, board of directors, and senior advisor of technical services for Shermco Industries, covers maintenance best practices for medium-voltage circuit breakers. |
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| | | The National Fire Protection Association (NFPA) recently released a proposed Tentative Interim Amendment (TIA) to the 2023 Edition of the National Electrical Code (NEC). The TIA was submitted by Michael Savage, Sr., Marion County Building Safety, and has a comment closing date of September 28, 2023. |
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| | | ABB’s MegaFlex UL wins the Platinum award in the 2023 EC&M Product of the Year competition. It yields lower installed cost, faster startups, and commissioning schedules. The MegaFlex design also allows for better heat rejection and simpler cooling especially when deployed inside critical power containers. |
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| | | In this special edition of EC&M On Air, Editor-in-Chief Ellen Parson sat down with the product managers representing the Platinum, Gold, and Silver winners of EC&M's 2023 Product of the Year competition to learn more about the products’ applications, development process, and end-user benefits. |
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| | | Test your knowledge of the NEC with this challenging quiz question from NEC Consultant John Lupacchino. True or false? It is permissible to install the grounding electrode conductor for a transformer through the ventilation slot on the bottom of the transformer. |
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| | | Article 450, Part III provides the requirements for transformer vaults. The first requirement is that they be located where they can be ventilated to the outside without using flues or ducts, wherever such an arrangement is practicable [Sec. 450.41]. |
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| | | You are being interviewed for a job as the plant electrical engineer. Among the several reasons you want this job, it’s a promotion from your current job. A mentor told you that when you go to that interview, ask the plant engineer what keeps him up at night — so you do. |
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| | | Microgrid-connected housing advances as resilience and sustainability lure buyers. Trendy new residential developments that feature elements of shared power self-sufficiency, control, and management, hallmarks of a microgrid or a mix of site-based distributed energy resources (DER), are popping up from coast-to-coast at a quickening pace. |
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| | | Fill in the blank. Each outlet installed for the purpose of charging electric vehicles shall be supplied by an individual _____ circuit that shall have no other outlets. |
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| | | This photo gallery offers a sneak peek at the companies making it into the Top 20 spots, listed in descending order and based on their 2022 electrical sales data. To find out more about the driving forces behind the key players in the electrical contracting business, read the full 2023 Top 50 Electrical Contractors Special Report and Top 50 Rankings... |
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| | | This article is part of a multi-part series on how to identify, monitor, diagnose, and deal with harmonics in electrical power systems. Last month’s column discussed how to take the data gathered when measuring harmonic levels and develop mitigation or reduction techniques for lowering total harmonic distortion (THD). This month, we will expand on ... |
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| | | One of the most often mentioned and misunderstood power quality issues we see with commercial, industrial, and power-generating electrical equipment is harmonics. This is Part 1 of a multi-part series to discuss how to identify, monitor, diagnose, and deal with harmonics in large electrical systems. |
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| | | In last month’s column, I addressed the question of what harmonics is and why you should care. In this installment of our multi-part series on power quality topics, we’ll move on to how to identify, monitor, diagnose, and deal with harmonics in electrical power systems. |
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| | | This article is part of a multi-part series on how to identify, monitor, diagnose, and deal with harmonics in electrical power systems. Last month’s article discussed how to determine if current and/or voltage distortion levels were sufficiently high to classify a power quality issue as a harmonic problem. This month, we’ll review how to take the data... |
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| | | When voltage sags occur inside or outside of a facility, properly placed power quality mitigation technology will save sensitive equipment from costly shutdowns. The cost of this mitigation equipment varies, so evaluate the lowest cost solution first. |
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| | | Changing the tap on a transformer can solve a problem at the time, especially in the summer when electric utility voltages start to sag a bit due to high electricity demands. It’s a reasonable fix, whereby the process of changing the tap requires only de-energizing the facility for a brief period. |
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| | | Buzz around technology that could transform how utilities build transmission infrastructure to address emerging electrical grid challenges is getting more audible. Three companies pioneering advanced, high-capacity conductors have just joined forces in the Advancing Modern Powerlines (AMP) Coalition, aiming to promote their utilization as a cornerstone... |
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| | | Take this quiz about U.S. electricity consumption and enter for a chance to win a $25 gift card to Amazon, iTunes, or Cabela’s! |
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