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  1. roobarb

    Limiting startup current

    Thanks gingell, Do you happen to have (or know of) some online technical information on resistor switching technique? (Dimensioning etc.)
  2. roobarb

    Limiting startup current

    Hello Folks, what practical (and cheap) solutions are there to limit the startup current of a 0.8MW fan? It is directly connected to the network and the high startup current causes a lot of trouble for me and customer. I have been thinking of inserting some resistance during startup and removing...
  3. roobarb

    Circuit breaker short circuit calculation

    I am fairly new to this. I have to perform short circuit calculation for a MV-LV switchyard and help in circuit breaker and protection ratings. I understand that I need the following currents from my CS calculation: - Initial Short-Circuit Current (I"k) - Maximum Asymmetrical Fault or Peak...
  4. roobarb

    neplan

    Thanks for the tip. How do you see where the error is actually from? For example when I run a simple self-made AC/AC converter I get the message: ...Start Analysis.... Iteration 1- Max. Mismatch at Equation: 43 = 1.#INF00e+000 Load Flow Calculation interrupted because of error. ...Assign...
  5. roobarb

    neplan

    Alex, I am trying to model a sample network with generators, a couple of transformers, CBs and some DC and AC consumers. (Load flow, short circuit mostly) How about DIgSILENT? I am actually evaluating both to see which one is worth buying. Any idea how much they cost? Roobarb
  6. roobarb

    neplan

    Neplan users, Could you actually do more than HVDC transmission with converters in Neplan? I'd like to have a decent uncontrolled 6 pulse rectifier connected to a LV bus bar feeding a resistor. b.t.w. Whats is the difference between simple and 3p-converters? Neplan version: 5.2.4

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