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  • Users: dcdtn
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  1. dcdtn

    Parallel Switching with Disconnect Switches

    I am looking for guidelines for the maximum current that a disconnect switch can break when the parallel path has a near-zero impedance (such as in the same station). The voltages I am looking at are 46kV through 161kV. Specifically I am wanting to open the bypass switch for a breaker after...
  2. dcdtn

    Switched capacitors at generating plant

    I have a situation in which we have installed switched capacitors on the bus at a generating plant. There are five generator units and 4 cap banks. Obviously, there is a conflict between the caps and generators since they are controlling the voltage at the same bus. In addition, for stability...
  3. dcdtn

    Steel Mills and Power Quality

    I am interested in information about the latest equipment available to minimize power quality problems (flicker, etc.) associated with arc furnaces at steel mills. Is there equipment available that could correct all PQ problems for a 500MW steel mill connected at 161-kV? And if so, at what...
  4. dcdtn

    Temporary Paralleling of Transformers

    I am wanting to parallel a 150MVA with a 250 MVA transformer (both 161-46-kV) temporarily in the event that one needs to be taken out for maintenance. Normally, one bank is heavily loaded and the other lightly loaded and the 46-kV bus is split. My first question is what type of switch is...
  5. dcdtn

    Breaker Rating Studies

    Hello, I am interested in learning how other engineers study the ratings of breakers on their systems. Our system has several thousand breakers (all voltage levels), and I am currently in the process of performing a comprehensive breaker duty study on all of them. I am making good progress...

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