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Recent content by prdpks2000

  1. prdpks2000

    15MVA Delta Star Transformer with Resistive earthing NCT-CT Specification

    Thanks, I do not know how to transfer the Post
  2. prdpks2000

    15MVA Delta Star Transformer with Resistive earthing NCT-CT Specification

    request concurrences on the CT Specification for 64-Restricted earth fault for transformer
  3. prdpks2000

    VFD MOTOR CONTROL WITH FWD REV AND LIMIT SWITCHES

    the wiring diagram of hoist/ crane with VFD can be refer as it has same concept.
  4. prdpks2000

    How do you determine required transformer LV earth fault current (NER and Earthing Tx sizing)?

    High Resistance Grounding & Low Resistance Grounding. High Resistance Grounding: It is generally used in mines, Petrochemical industry, generators with unit transformers to limit the ground fault current to a value less than 25 Amps. Low Resistance Grounding: It is generally adopted to limit the...
  5. prdpks2000

    Overload Performance of VFD in Hot Rolling Mill Application

    1) For VFD, motor shall also be suitable for VFD application so you have to check whether the existing motor can be run with VFD, VFD Motor Shall have Dual Coated Copper VPI Insulation, Insulated bearing at NDE, & shall be suitable for dv/dt 1.3kV in 0.1 µs. 2) the present configuration with...
  6. prdpks2000

    Load List - Peak Load estimation

    Dear Mr. Nick/Waross please correct if any thing wrong in this calculation. Pradeephttps://files.engineering.com/getfile.aspx?folder=4979a8ec-a2d5-4ef0-bab5-9781767be7cb&file=Excel_Sheet_Load_List.xls
  7. prdpks2000

    What are the possible configuration

    What are the possible configuration to communicate Siemens CPU; CPU 315-2P over Industrial Ethernet to Schinner PLC PLC-BMXP586040C Ethernet Communication Module-BMENOC0301C
  8. prdpks2000

    Electrical schematics software

    EPLANE is Good for Drafting Electrical Drawing's , having library for most of the component
  9. prdpks2000

    CT Primary Current

    What I understand from Scottf detailed reply is that ; 1) here the requirement of RF or Rated continuous thermal current or Rated dynamic current Idyn is about 1.5 2)the CT are available for RF factor 1,1.33,1.5,2,3,4 RF factor Rated at 30 Degree C 3)SO RF factor and Ambient temperature both...
  10. prdpks2000

    impedance of three winding transformer

    request transformer Data Sheet and GA
  11. prdpks2000

    there is two term in motor number o

    what my understanding for HOT and cold condition ; let motor is class F (Maximum 210Degree C short time permissible temperature ) temperature rise is limited to class B(Maximum limiting temperature is 185Degree C for short time permissible temperature) over ambient 40Degre C(allowed...
  12. prdpks2000

    there is two term in motor number o

    there is two term in motor number of start -stop permitted; Hot Start & Cold Start how they are defined in standard; what exactly there mean; let say its written 2 consecutive hot start after what time duration we can give again the consecutive hot start. what is significant of following...
  13. prdpks2000

    ETAP Motor Starting Study for 600kW Ball Mill

    the ball mill motor are generally slip ring type with LRS stator and starting current is limited to 1,5 times to rated current , the ball mill provided with speed torque curve.
  14. prdpks2000

    ETAP Short Circuit Analysis

    request you to share the etap file so that alert can be analyzed .
  15. prdpks2000

    protection sizing for distribution transformer

    Thanks , I checking some consulting manual per it current of transformer with rated MVA at lowest tap link of same Link
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