1. D

    busbar current capacity

    Hi, I wonder how a maximum current rating for wires and busbars are calculated. How the maximum current rating for busbars are calculated, is there any standard for this. I used a copper busbar for my motor connection. but i need how much max current can be passed through it, is there any...
  2. Lambo Av

    Generator protection, calculating resistance for protection

    A 20kV, 100VA generator is protected by differential protection. 70% of the winding will be protected against the phase. What is the value of resistance to be located at the "Neutral to Ground" protection if the relay operates 30% out of the balance current? Below are my steps to the solution...
  3. Lambo Av

    Star-connected, 3-phase, synchronous generator with armature resistance, reactance, leakage resistance. Calculate rated load and unity power factor

    If a 100 KVA star-connected 400 V three-phase, 60 Hz synchronous generator with armature resistance 0.35Ω/phase and 3.5Ω reactance and leakage resistance given is 1Ω/phase. Calculate at rated load and unity power factor at i) No load e.m.f ii) Internal e.m.f. iii) percentage of regulation at...
  4. Alcore

    Finding an unknown resistance

    Hello. This may be a simple problem, but I'm struggling to obtain the resistance R found in the figure below. First what's throwing my are the two voltage sources. I'm used to seeing these present in op-amps, but the way they intersect is throwing me. I'm not sure how to determine their...
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