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  • Transformer Theory
    A transformer is an energy transfer device. It has an input side (primary) and an output side (secondary). Electrical energy applied to the primary is converted to a magnetic field which in turn, induces a current in the secondary which carries energy to the load connected to the secondary
  • The Importance of Effective Transformer and Control Transformer Protection (.pdf)
    The importance of effective transformer and control transformer protection cannot be over emphasized. After motors, transformers are typically the second most common application where proper overcurrent protection is required and utilized to provide the necessary protection to facilities
  • Current Transformer Overview
    A current transformers (CT) is a device that can detect a current through a wire passing through its center. This wire constitutes a one-turn primary for the transformer, and the winding on the CT constitutes the secondary of the transformer.
  • Vaisala Tackles Transformer Downtime
    Customer shipping begins for unique in-oil condition monitoring probe that provides critical early warning information to track transformer faults.
  • The Secrets of Transformer Cooling
    As our transformer fleet continues to age, caring for these units requires a high level of expertise. This is due to the level of complexity of the cooling systems and subsystems involved. In order to help you better understand how you can maintain your own systems, I will explain maintenance tips
  • Mitigating Isolation Transformer (.pdf)
    Transformer efficiency shall satisfy EPA Energy Star (R) requirements at not just 35% load as required by NEMA Std. TP-1, but also over the operating range from 35 to 65% load.
  • Transformer Basics (.pdf)
    There is more than meets the eye in the insulation employed in transformers. Among the. design and construction considerations are temperature and voltage ratings. To those unfamiliar with transformer manufacturing, terms such as fish, kraft, natural fiber and gum might sound like the main
  • Wideband Transformer Characteristics
    After deciding which of the configurations is required, major characteristics of wideband transformers are: Input and Output Impedances. Impedances are determined by the source and load impedances to be interfaced by the transformer. Inasmuch as the transformer is essentially a loss less device
  • Current Transformer Measurements
    The Current Transformer (CT) is used to sense AC current in single-phase or three-phase mains circuits. The CT typically has a 1A or 5A AC secondary that connects to a current, power or energy meter. This allows the meter to be located away from the mains wiring. CTs are available in a variety
  • 3-phase Transformer
    The model presented here is the simulated results of the ohmic losses and flux density of a 3 phase transformer with a three limbed paramagnetic core ( µ_p˜8.0412×?10?^(-3) N/A^2 ). The symmetry in the z-axis has been used to minimize the problem size and accelerate solution time. The coils
  • Measuring Transformer Distributed Capacitance
    This article is a general discussion of distributed capacitance, Cd, in transformers with emphasis on measurement. We will discuss how capacitance occurs, references to formula for calculating, how capacitance is modeled, how Cd is measured (with three cautionary notes) and guidelines to aid
  • White Paper: Comparing Transformer-free to Transformer-based UPS Designs
    There is growing interest in utilizing transformerfree. UPS modules in high power, three-phase critical. power backup applications. This prompts a debate. over which architecture-transformer-based or. transformer-free-is best suited for critical data. centers. In general, transformer-based UPSs
  • Logistics Risk Management in the Transformer Industry
    Transformers often are shipped thousands of miles, involving multiple handoffs, and more than a dozen logistics teams before they are installed. With an impact threshold of about 2.5g, damage isn't always evident. Hidden damage may trigger an event cascade that causes catastrophic failure long
  • Measuring Antioxidant Inhibitor in Transformer Oils
    Monitoring the degradation of the antioxidant in transformer insulating oil can result in substantial savings by extending the service life of the oil and by slowing down the transformer aging process. 2,6 ditertiarybytyl paracresol (DBPC) and 2,6-di-tert-Butyl Phenol (DBP) are common inhibitors
  • Transformer Design for Charging Defibrillator Capacitors
    transformer design phase for charging a capacitor in a stated time. The procedure presented eliminates "cut and try" or over-design approaches. Selection of critical values can be made with confidence using the guidance provided. First a little background in flyback topology. Flyback topology has
  • Compact and High Power Transformer Solution
    Wind turbines require a compact and high power transformer solution in order to provide the maximum output with the smallest weight. In the past most wind turbines which had on board transformers utilised cast resin technology. However, increases in power ratings and higher voltages have meant