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  1. Newbie2000

    Single core cable selection

    Hello, I have 690V network, 3 phase system, no neutral, with 2400Amps load current. I end up with 8 runs of 3 core 240mm2 cable size. When I select 1 core cable, I can manage with 12 runs. It means only 4 runs per phase. 3 core cable in general has low current capacity than single core. Is...
  2. Newbie2000

    Circuit Breakers not selective

    Hi All, I have a situation in hand, the client asks for certain protection coordination ( breaker curve) for our switchboard circuit breaker because at present situation the client generator circuit breaker will trip before our switchboard and it is not acceptable. Now our Vendor has replied...
  3. Newbie2000

    Reliability of Bus Tie breaker protection

    Hello Fellow Members, Excuse me for my lack of knowledge, I am a project engineer and putting this topic for clearing my doubts and getting some more electrical knowledge. Suppose I have 2 switchboards, each switchboard has 2 busbars (so in total 4 busbars). Each busbar will be powered by one...

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