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Recent content by amphan

  1. amphan

    Please suggest me about my idea for power transformer

    Hi; I don't know %reactance of the reactor but I calculate from voltage drop, it's about 10% of system. Specification of reactor: I 1870 A L 4.8 mH Best Regards; ast
  2. amphan

    Please suggest me about my idea for power transformer

    Hi; Thank you to prc, Yes, My plant have an arc furnace and my system have the SVC system for 2'nd, 3'rd,4'th harmonic filter total power = 100 MVA and now I used only 2'nd,3'rd and have pf=0.9957 So I think the 3'rd harmonic should be a SVC's Function. Best regards; ast
  3. amphan

    Please suggest me about my idea for power transformer

    Hi; Thank you to Ralph, So I contact to ABB's representator in the next time. Yes I worry very much about volatge drop on series reactor because my process need the voltage and power for increase the pocess time but not need change the transformer. Before I post this problem , I check...
  4. amphan

    Please suggest me about my idea for power transformer

    Hi; Thank you for your answer; At power tr 100 MVA Imp= 12 % and Power tr 72 MVA Imp = 10-12 % depend on OLTC tap select. Best regards; ast
  5. amphan

    Please suggest me about my idea for power transformer

    Hi; My factory worked since 1992, I check the power circuit of power transfermer and found a point of loss as this follow. :-----------: :------------: : 100 : : 72 : : MVA : ------> Series reactor...
  6. amphan

    Don't know what happen on motor that use for pump

    I have some problem in water pump group motor in my factory. I must be change a motor's bearing every 1-2 month because the shock pulse value exceed standard value (~35db). I check everything and found 1. The grease (type shell R3) in Brearing non-drive change to liquid status...

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