O IDR ATUA OU NÃO ATUA? – TESTAMOS ESTE EXERCÍCIO NA PRÁTICA.

🎁 Products we recommend: 🔗 https://meli.la/2njVbpU __________________________________________________ Automate your electrical calculations with our spreadsheets: Link to purchase the Electrical Calculation Spreadsheet: https://hotm.art/ytd-planilha-calculo... Link to purchase the Load Schedule 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 content from Eletricity directly to your email! Register through the link below: 🔗 https://bit.ly/cadastro-eletricity __________________________________________________ Link to the Banggood store 👉 https://ban.ggood.vip/Vz22 __________________________________________________ 👇 Check out our content 👇 🔌 https://linktr.ee/Eletricity __________________________________________________ Are you able to analyze whether an RCD (Residual Current Device) is working or not in a given situation? One of the goals of the Eletricity channel is to bring information and knowledge to subscribers. If you follow the channel and watch our videos, you are already able to diagnose some defects. The proposed exercise was created by Kurt Meister, administrator of the Facebook group Electricity, Theory in Practice. We have a transformer and a 220V electrical circuit with a 30mA RCD (Residual Current Device) supplying a resistive load. Accidentally, one of the load's power cables makes contact with ground. The 1kΩ resistor simulates, for example, an insulation fault and not a direct contact. Under these conditions, does the RCD trip or not? In videos on this channel, you've probably seen that a 30mA RCD cannot trip for currents below 50% of its nominal value, i.e., 15mA; it can trip for currents above 50%, i.e., 15mA or more; and it must trip instantly for currents of 30mA or more. Let's analyze the leakage current value to determine if the RCD trips or not. If we have 220V across the load, between the leakage point and ground, we have 127V across a 1kΩ resistor, giving us a value of 0.127A or 127mA, which would cause the RCD to trip correctly? No, this type of analysis is completely wrong. If you look more closely, you'll notice that the load is not being powered directly by the mains, but by an isolation transformer, and there is no grounding at any point on the secondary side. Therefore, we have a completely isolated system, and thus there is no potential difference between one of the load poles and the ground. We've already shown this in detail in a video on this channel (   • IDR DESARMOU E PERDI TUDO QUE TINHA NO FRE...  ). Therefore, the correct answer is: The RCD does not trip for the suggested leakage, even if it were a direct contact without the 1kΩ resistor. Did you like the challenge? Would you like more exercises like this on the channel? Leave your suggestion in the comments. Until next time. 💡 Check out #electricity 💡 __________________________________________________ 👇 Most Watched Videos: We Threw a Hair Dryer in the Bathtub. What Happened? 🎥    • SECADOR DE CABELO NA BANHEIRA PODE MATAR? 🛀☠️   We Unmask the Myth of the Shower Incompatible with RCD (Residual Current Device). 🎥    • DESVENDAMOS O MITO DO CHUVEIRO INCOMPATÍVE...   What They DIDN'T TELL YOU about the CONTROVERSY of the 3-PIN OUTLET. 🎥 https://bit.ly/2JE4P07 Ground and Neutral, Together or Separate? Why Didn't Anyone Tell You This Before? 🎥    • TERRA E NEUTRO, JUNTO OU SEPARADO? PORQUE ...   Where Does the Neutral Come From? How Does It Arise in the Transformer? Find Out in This Video. 🎥    • DE ONDE VEM O NEUTRO? COMO ELE SURGE NO TR...   Autotransformer vs. Energy Bill. You Can Save Up to 30 Reais If You Follow This Tip. 🎥    • AUTOTRANSFORMADOR x CONTA DE ENERGIA. VOCÊ...   Three-Phase Motor Inside - See How It Works in Practice. 🎥    • MOTOR TRIFÁSICO POR DENTRO - VEJA O FUNCIO...   How to Make Curves and Level Changes in Cable Trays. 🎥 https://bit.ly/2ABlrk4 Do You Know All the Functions of Wire Stripping Pliers? 🎥 https://bit.ly/2GD5Sun What's Best for Branching in Electrical Panels? We Tested It For You, See the Result. 🎥 https://bit.ly/2MDdrHl We connected 3 lamps in a star configuration without a neutral wire. Will it work? The result is impressive. 🎥 https://bit.ly/2BzUkH1 We tested the WAGO 221 connector and the result was incredible. 🎥 https://bit.ly/2PknMoz Insulation test. 🎥 https://bit.ly/2wEYcDV Connection test. 🎥 https://bit.ly/2MHQdzZ_ __________________________________________________ Production and Editing. 🎬 Adoniran Freitas 🎬 Afrânio Freitas 🎬 Maecilei Leal 🎬 Dálcio Araújo __________________________________________________ Support: Life Print Company. 💻 http://printcompany.com.br/site/