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  • Users: Raj Adrika
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  1. Raj Adrika

    Rigid bus calculation supported by underhung insulator

    I have to design 34.5 kv rigid bus system which would be supported by underhung insulator ( insulator would be mounted at ceiling)and there would be AL pipe bus at other end of the insulator. I am wondering to calculate span length it would be same calculation as per IEEE 605? Since it would be...
  2. Raj Adrika

    4.16GRDY/2.4KV-240/120V Station service transformer-

    Could a grounded wye 1phase station service transformer (4.16GRDY/2.4KV-240/120V) be connected L-N on high impedance grounding (HRG- 160 ohm, 15amps)system? If not then could you please explain why? During a ground fault what would be the value of line TO N voltage across the Station service?
  3. Raj Adrika

    Station service transformer(SST) selection

    I have power transformer( 25MVA, Delta/wye, 138kv/4.16kv)and the Xo is connected with 160ohm , 15A for 10 sec NGR. I have metering PT ( 3 single phase units, two bushings N.S.V 15kv, 110 kv bil, H1-H2-2.4kv, SEC. 120V ratio 20:1)which I am planing to connect L-N. In such case which type of...
  4. Raj Adrika

    Hello, I have to calculate allowab

    Hello, I have to calculate allowable span length where there is 3 spans. From left, two spans consist of insulator with Slide, slide and fixed connector. The next right span has disconnect switch with expansion connector.The bus is 3.5" sch 40 AL with insulator TR287. I went through IEEE 605...
  5. Raj Adrika

    Terminal Loading of disconnect switch consideration in rigid bus design.

    thread238-3844 Hello, I have to calculate allowable span length where there is 3 spans. From left, two spans consist of insulator with Slide, slide and fixed connector. The next right span has disconnect switch with expansion connector.The bus is 3.5" sch 40 AL with insulator TR287. I went...

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