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  1. lmh4534

    What is "subsynchronous"?

    Thanks! I wonder if "non-synchronous" value is including "sub-synchronous" or not.
  2. lmh4534

    What is "subsynchronous"?

    Thanks! I understood "sub hamonics" is x/2, x/3....x/9. (x=running speed). Isn't "sub syncronous" equal to "sub harmonics"?
  3. lmh4534

    What is "subsynchronous"?

    I have a portabel vibration analyzer, CMVA60 (MAKER:SKF). When I print the vibration spectrum, the output is consist of spectrum and displacement value of overall/ synchronous / subsynchronous / nonchronous. what's the overall/ synchronous / subsynchronous / nonsynchronous? Please help me!
  4. lmh4534

    How can I select CT(Current Transformer) capacity?

    Thanks everyone! so many good views & infomations..I'm so happy! I want to see IEEE C37.96, C37.110 and C57.13. stated above. Could anyone help me? M.H.Lee mhlee@seahsp.co.kr
  5. lmh4534

    How can I select CT(Current Transformer) capacity?

    Design Conditions -Full Load Current(Motor 1790kw, 6kv, 50Hz) : 200A How can I select CT capacity(primary side)? ..CT Ratio? Is there a related Code or Standard? Please! Please! Tell me any information... Thank you!
  6. lmh4534

    Centrifugal compressor

    About centrifugal air compressor choke(stone-wall).. The centrifugal air compressor has "surge" and "choke". Generally surge effect is well known but choke(stone-wall) is not. When the compressor operate at choke, what is the problem and disadvantage?

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