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  1. luiscunha1978

    Voltage Drop Calculation

    Ok waross, thank you for your time. Luis
  2. luiscunha1978

    Voltage Drop Calculation

    This is an important issue for me. I spend several hours doing the spreedsheet, because I would love to understand if I'm doing the things right. This is not my academic background and I need help do understand this matter. Thank you Luis
  3. luiscunha1978

    Voltage Drop Calculation

    Hi Waross, I don't know if I do the math correctly like you pointed maybe not (I did not fully understand its indications again) :( but I've tried. I found a manual on the web and I try to compute the voltage drop: "Electrical installation handbook Volume 2 1SDC010001D0204 ABB SACE Electrical...
  4. luiscunha1978

    Circuit Beaker - Switch Disconnector (Rated Current Selection Method)

    Thank you both! I think I understand. You guys are great.
  5. luiscunha1978

    Voltage Drop Calculation

    Hi waross, I don't think I fuly understand you kind explation. I will try to do it. But what you said is that the R voltage dropp will be greater than the S an T phases,so it's not necessary to sum the R + S + T because they are diferent phases, becasuse they are distribute in the diferent...
  6. luiscunha1978

    Voltage Drop Calculation

    Hey! This week I found this circuit in an industrial facility (at Europre). There is a Main Distribution Board that connects 4 Partial Boards as you can see in the figure below. In the Main Distribution Board there is an MCB (32A) dedicated to the heating of the Partial Boards. The circuit...
  7. luiscunha1978

    Circuit Beaker - Switch Disconnector (Rated Current Selection Method)

    Hello, First sorry for my ignorance, but I really need help to understand an issue related to an electrical installation design that I have seen recently. I have an installation with several electrical boards: the Main Distribution Board and Secondary Distribution Boards powered from the first...
  8. luiscunha1978

    HV Substations Insulators - Silicone Rubber RTV Coating

    My question is, when applying the coat in a Substation, what happened if the RTV Coating particles acumulate between the HV connector (live part) and the HV equipment terminal pad (live part), for instance? Or what will happened if the sprayed RTV coat acummulate direct in the bare alluminium...
  9. luiscunha1978

    HV Substations Insulators - Silicone Rubber RTV Coating

    Hi! I've watched a video fee days ago where a RTV coating was being applied in a substation insulators. I've noticed that they noy isolated the application area (surroundig the insulator) and the product was floating by the air. My question, is: the product could accumulate in the HV equipment...
  10. luiscunha1978

    Line Trap Positioning

    Thank you davidbeach and scottf for your support. That is clear now! That drawing was issued by my client and the unlabeled device is in fact a Surge Arrester. The CCVT is coupling capacitor voltage transformer.
  11. luiscunha1978

    Line Trap Positioning

    Hi everyone! I need help to understand how the below line trap (LT) positioning/mounting will allow the correct functionality of the PLC system. As you can see this is a suspended mounted LT and bellow we have a CCVT: From my understanding, since the LT blocks the carrier frequency by...
  12. luiscunha1978

    Substation Insulator Strings

    Very interesting! In this case, if I understood correctly, the distance between the arching horns should be such that in normal operating conditions, there is no arc between points A (230kV) and B (0V) and in the event of an overvoltage/surge discharge, that same distance, offers the least...
  13. luiscunha1978

    Substation Insulator Strings

    Hello! @zeusfaber thank you very much for the explanation was quite enlightening! Mbrooke, Thank you once again for your patience and willingness to help me understand this issue. This forum is certainly very useful especially as people like you who, however banal, who may seem the questions...
  14. luiscunha1978

    Substation Insulator Strings

    Hello! Absurdly, if a person could climb up the metal structure and sit in Point B, no harm would happen to him?
  15. luiscunha1978

    Substation Insulator Strings

    Thank you Mbrooke! I think in getting there ;) thank you for your time and patience.
  16. luiscunha1978

    Substation Insulator Strings

    Please. Do not get into a discussion because of my questions and doubts. My intention is try to understand and thank you both. I think this is a fascinating area. From what I realized it is wrong to say that in a three-phase system a conductor has 400kV, because that is the measure between...
  17. luiscunha1978

    Substation Insulator Strings

    Hi Mr. Gunnar. For a layman like me and in order to realize that... at point A will have 400kV and at point B will have 0V. It is that? Thank you in advanced. My best regards.
  18. luiscunha1978

    Substation Insulator Strings

    Hi Mbrooke!Thank you for the answer...but why point A is 230kV and not 400kV?
  19. luiscunha1978

    Substation Insulator Strings

    Hi Waross! Thank you but I did not understand very well ... I'm sorry ... I must be very stupid :( The point A is at 400kV The point B is at 0 volts It's that?
  20. luiscunha1978

    Substation Insulator Strings

    Hi Keith! Thanks for the answer and the kindness. But I still have not noticed something ... in this drawing ... in normal operation, without over-voltages, on the substation side the voltage is 400kV? I'm sorry if the question is stupid, but I do not understand anything about this area...

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