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  • Moisture Measurement in SF6 - A Permanent, Environmentally Safe Solution (.pdf)
    Most electric utilities and independent power producers use Sulfur Hexafluoride (SF6) as an arc quenching and insulating gas in high voltage circuit breakers and switchgear installed in their electrical transmission and distribution systems. These circuit breakers require periodic maintenance
  • Tackling the Dirty Dozen
    overcurrents. Main applications include machinery or vehicles with high-current in-rushes that accompany starting of electric motors, transformers, and solenoids. Thermal-magnetic circuit breakers combine the benefits of thermal and magnetic types. High overcurrents make the solenoid trigger the release
  • Medical Device Link .
    and the neutral side to compensate for the possibility of incorrect wiring or crossed wire colors somewhere in the building. If the equipment is wired incorrectly, operators using a device with a single-pole circuit breaker are at risk of electric shock when it trips. Two-pole circuit breakers provide
  • Ground-fault interrupters
    fibrillation, the most common cause of death through electric shock. A point to note about GFCIs is that they can't protect against faults which do not involve an external leakage current, as when current passes directly from one side of the circuit through the victim to the other. Thus they don't
  • Sulfur Hexafluoride (SF6) Insulating Gas Leak Detection with an IR Imaging Camera
    For years, electric utility transmission thermographers have wanted a camera that could spot leaking sulfur hexafluoride, SF6. As an insulating gas, SF6 is widely used by the electric power industry in high voltage circuit breakers to prevent arcing. Early efforts met with limited success through
  • Systems versus Components - Which Way to Go?
    A solar electric system has only a few basic components. (solar module, regulator, battery bank, enclosure, and. mounting structure). However, a typical bill of materials. for a SunWize system contains 75 to 100 items including. fasteners, connectors, terminal blocks, circuit breakers,. lightning
  • Self-Protecting Starters
    protects against both thermal and magnetic overload. The self-protected starter can be used in single or multiple installations and satisfy Article 430 of the National Electric Code (NEC) which addresses the safe installation of motors, circuits, and controllers. Power-control equipment comprises motor
  • Avoiding Grid Meltdown
    bottlenecks. The scale of a typical UPFC inverter becomes evident from this photo of the inverter hall taken at the American Electric Power Inez substation located in eastern Kentucky. Installed by Siemens three years ago, it is rated at 640 MVA. It sits in the building visible in the top of the aerial

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