Link to purchase the Electrical Calculations Spreadsheet: https://hotm.art/ytd-planilha-calculo... Link to purchase the Load Panel Calculation Spreadsheet: https://hotm.art/ytd-planilha-quadro-... Link to purchase the Electrical Plant Sizing Spreadsheet: https://hotm.art/ytd-planilha-plantas... __________________________________________________ If you like the Eletricity channel and want to contribute to the generation of quality content, then access one of the options below: PIX KEY ???? [email protected] QR CODE ???? https://bit.ly/doacao-pix __________________________________________________ Receive Eletricity content straight to your email! Sign up using the link below: ???? https://bit.ly/cadastro-eletricity __________________________________________________ Want to know more about the equipment we use for testing? Visit our partner OHMIC and discover its full line of products for testing laboratories, education centers, and industries. ???? https://ohmic.com.br/ __________________________________________________ ???? Check out our content ???? ???? https://linktr.ee/Eletricity __________________________________________________ When we have single-phase loads in different phases and sharing the same neutral, the current in the neutral is not the direct mathematical sum of the currents in the phase. This sum is vectorial and we have already shown this here on the channel. And when we share the same phase? Does the same thing happen? Do you want to know the answer? Then, tune in! This is an exercise to test your knowledge about the behavior of currents and also about circuit breaker curves. Imagine the following situation: I have 3 identical resistive loads fed by two phases each in a three-phase system. If I call the loads 1, 2 and 3, we would have load 1 on phases A and B, load 2 on phases B and C and load 3 on phases C and A. Each load has a current of 9A. If I have a 16A three-phase circuit breaker protecting these 3 loads, will this circuit breaker trip when all of them are turned on? What many people do in a case like this is to directly add the 9A currents in the phases. Since we have the value of 9A x 2, we would then have 18A in each phase and a 16A circuit breaker would trip, because the current exceeded its capacity. If you also think so, I regret to inform you that you are completely wrong. Three identical loads that operate with 2 phases, connected in a three-phase system characterize a balanced delta connection and we would have the following configuration. In this case, the currents would be Iab, Ibc and Ica. Note then that we always have two currents in opposite directions and remember that the currents are 120° out of phase with each other. Therefore, I have to add, for example, in phase A a current of 9A with an angle of 0° Iab with another of 9A and an angle of 120° in the opposite direction Ibc. Let's see how this looks in vector representation? If we do the direct graphic representation, we will see Iab and Ibc out of phase with 120°, but as we mentioned Ibc is in opposite directions. By doing this, we have this new configuration and the result will not be the direct sum of the 2 values ​​9A+9A, but will be the vector sum which in this case will be 9 times square root 3 which gives me a value of 15.4A, exactly as our vectors show. If the resultant is 15.4A, the 16A circuit breaker will not trip and even if it were 18A, it would not trip either, since 18A corresponds to 1.125 times the nominal current and would be in the circuit breaker's non-trip range, which is up to 1.13 times the nominal current. We have a detailed video about circuit breaker curves here on the channel ( • WHAT IS A CIRCUIT BREAKER CURVE? THEORY AND ... ). So that's it folks, once again the #eletricity channel brought you technical knowledge with theory and practice. See you next time! ???? Tune in to #eletricity ???? __________________________________________________ ???? Most Watched Videos: We Threw a Hair Dryer in the Bathtub. What Happened? ???? • A HAIR DRYER IN THE BATH CAN DAMAGE... We debunk the Myth of the Shower Not Compatible with IDR (DR). ???? • WE UNVEIL THE MYTH OF THE INCOMPATIBLE SHOWER... What THEY DIDN'T TELL YOU about the 3-PIN SOCKET CONTROVERSY. ???? https://bit.ly/2JE4P07 Ground and Neutral, Together or Separate? Why Has No One Told You This Before? ???? • GROUND AND NEUTRAL, TOGETHER OR SEPARATE? W... Where Does the Neutral Come From? How Does It Appear in the Transformer? Find Out in This Video. ???? • WHERE DOES THE NEUTRAL COME FROM? HOW DOES IT APPEAR ... Autotransformer x Energy Bill. You Can Save Up to 30 Reais If You Follow This Tip. ???? • AUTOTRANSFORMER x ENERGY BILL.... Three-Phase Motor Inside - See How It Works In Practice. ???? • THREE-PHASE MOTOR INSIDE - SEE THE F... How to Make Curves and Unevenness in Electrical Troughs. ???? https://bit.ly/2ABlrk4