| | | | | | One way to evaluate dry-type and solid insulation is to perform AC insulation tests and use testing techniques to quantify losses in electrical insulation. Power factor (PF) and power factor testing techniques are being used to provide valuable information for triggering decisions related to testing and maintenance, and perhaps even for asset replacement... |
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| | Sponsored | | Our solenoid interlock door prevents access to temporary cable connections while the unit is energized, preventing access to connection points while the unit is under load. Access is allowed in the breaker section for monitoring, adjustments or service as needed via the secondary door. When the cables are de-energized, the lock is disengaged, and users can now safely remove or install their cables. |
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| | | | Episode 70 features Part 2 of EC&M Editor-in-Chief's conversation with Philip Keebler, technical advisor to PBE Engineers. They cover common misconceptions throughout the power quality industry that electrical professionals need to be aware of. |
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| | Sponsored | | Power issues shouldn’t keep you guessing. Dranetz meters deliver accurate, standard-compliant data you can trust—at a cost that protects your budget. Our meters make it easier to spot problems early, protect your equipment, and justify smart investments. Simple setup, clear reporting, and real tech support mean you stay prepared, not reactive. |
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| | | | Two types of dielectric tests must be performed on insulated aerial devices and digger derricks: the qualification test and the periodic test. The qualification test is required to determine the voltage rating of the unit. The periodic test is done at intervals to verify that the equipment continues to provide the expected insulation. Knowing who is... |
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| | | With ample charging infrastructure emerging as a "must" for EV buyers, the suspension of NEVI could prove damaging to the industry. |
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| | Sponsored | 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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| | | While the most-cited categories tend to stay the same each year, the order did shift some between 2023 and 2024 and saw fewer total citations across the 10 categories. |
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| | | In this video, filmed at the NETA PowerTest 25 show, Ellen Parson interviews Alex Chausovsky, director of analystics and consulting at Bundy Group, on navigating the current economic and labor market, including his take of tariffs. |
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| | | It's that time of year again — time to preview EC&M's highly anticipated Top 40 electrical design firms list for 2025, ranked specifically by electrical design revenue earned in 2024. This photo gallery offers a sneak peek at the companies making it into the top 10 spots, listed in descending order. |
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| | | Ferroresonance can be worsened by poor system grounding — through either ineffective ground connections or high soil resistivity. The high voltage created on the primary system during the resonance could cause a rise in ground potential, which would have subjected sensitive equipment to voltages that could have exceeded insulation levels. |
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| | | Selecting the proper voltage sag mitigation option for high-current equipment can be tricky. Most of the mitigation technologies available today are designed for lower current applications (e.g., control circuits). In most power quality cases, the control systems are the most sensitive to voltage sags in the electrical system. However, manufacturer... |
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| | | These systems store energy, typically in a battery, and then release that energy when needed. How much of that energy and how long that energy is provided depends on the amount of storage the UPS can handle and the load demand. |
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