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  • Users: GadreP
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  1. GadreP

    Civil detail & clearances for 160kVA Trafo

    Dear Friends, I have a step-up transformer of 415/11000V, 160kVA. Can anybody provide me information on civil details? I basically need the height of foundation from FGL & how much clearance is required on all the 4 sides of transformer. Also I need to install a DG set (160kVA, 415V) in...
  2. GadreP

    Transformer primary feeder sizing.

    Dear Friends, I have a question regarding sizing of the breaker for primary side of transformer. I have 160kVA, 415 to 11kV, Z=4.5%, ONAN transformer. Its full load current is 223A. What should be the size of the feeder. I referred to NEC & it says 125% of FLC of transformer. I have chosen...
  3. GadreP

    Transformer Inrush

    Guys, I have a step-up transformer 100 kVA, 415/11000V. The impdance is 5%. What is a value of inrush current? I read some articles but everybody has different views which is really confusing me. Some people say 10-12 times rated primary current & some people say 10-12 time secondary rated...
  4. GadreP

    3P breaker with neutral contactor Vs 4 Pole breaker

    Hi guys, I just want your opinion about a system: I have a turbing generator star connected. The supplier is suggesting a 3 Pole ACB with neutral contactor. The ACB rating is 630A, 415V. What will happen if I use 4 Pole ACB without neutral contactor? Please suggest whether a system will work...
  5. GadreP

    Overhead transmission lines

    Hi All, I am working on overhead transmission lines & as I am new to this field I want your help. I have 2 Steam generators & a 100KVA DG feeding to a 415V bus. There is no transformer at incoming line. The bus will be charged by 2 Steam generators & DG will work only in emergency condition...

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