???? REGISTRATION LINK: https://ce.engehalleletrica.com.br/o-... ------ ???? FAAALA ENGEHALL COMMUNITY ???? Join our community on WhatsApp to receive valuable tips and news in the electrical area, important information and much more. ???? ???? https://eletr.co/fala-eng?utm_content= ------ Did you like this video? ???? ✔️ Leave your comment and share with friends ✔️ Follow our networks ➽ https://eletr.co/links - - - - - - - - - - - - - - - - - - - - - - - - - - - - He installed an ALTERNATING CURRENT CIRCUIT BREAKER in DIRECT CURRENT My dears, to explain whether or not you can use an alternating current circuit breaker instead of a direct current circuit breaker, we will refer to a part of the history of electricity that became known as the “War of the Currents”. In 1903, there was a commercial dispute between two great names in electricity, the businessman Thomas Edison and the inventor Nikola Tesla. Tesla defended the use of alternating current because it was more economically efficient, and Edison defended the use of direct current, because according to him it was less dangerous. To convince the public of the dangers of alternating current, Edison then had the inhumane idea of ​​electrocuting animals using alternating current. Among these animals, an elephant was killed, and this backfired, because the people did not approve of the slaughter of such a large and beautiful animal for such simple reasons. Now that we understand where it all began, let's now delve a little deeper into the difference between alternating and direct current and their applications. Alternating current is characterized by the constant change in direction of electrons, which can occur up to 60 times per second. Therefore, we say that the electric current in Brazil has a frequency of 60 Hertz, each Hertz is equivalent to 1 cycle per second. Alternating current is most commonly used for transmitting electricity over long distances. This is due to the ease of changing the voltage range through transformers. In addition, it has much lower losses compared to direct current, making it a more efficient form of energy transmission and the type of current that reaches homes. In practical terms, alternating current is the energy that leaves the power distribution company and passes through the poles until it reaches your home. In direct current, electrons follow a single direction, from the positive side to the negative side. It is commonly used in low-voltage circuits, as well as in electronic devices. A good example of an area where this type of current is being widely used is the generation of photovoltaic solar energy. And how does this system work? Basically, solar panels capture light and convert it into direct electrical current, which, after passing through an inverter, is converted into alternating current. And to ensure the safety of the installation and its occupants, both the DC side of the installation, that is, the part between the solar panels, and the AC side, which is the existing electrical installation, need to be protected. Both NBR 5410, the main standard for low-voltage installations, and NBR 16690, which deals with photovoltaic systems, state that installations must have protection against short circuits, overvoltage and overcurrent. To protect against overvoltage, we use the DPS, as many of you are already familiar with, and for overcurrent and short circuits, we use the circuit breaker. However, there is a small detail here: it is necessary to use both the DPS and the specific circuit breakers for DC (direct current) and AC (alternating current). “Hey! But didn’t the engineer say that circuit breakers are not all the same, André?” I’m sorry to inform you, my dear, but they are not all the same! As I said at the beginning of the video, direct current, precisely because it is continuous, makes this difference in a practical and visual way for everyone to understand. First, it closes the circuit at 220V in alternating current. When opening the circuit, we can barely see the arc generated. Now, when it switches to the same 220V in direct current, my friend, just look at the opening of the arc. Remember that the load is the same. And because it has this electric arc, it needs a specific circuit breaker for direct current. The extinguishing chamber for this electric arc in a DC circuit breaker is much larger than that of an AC circuit breaker, as well as its contacts, which are more robust than the contacts in an AC circuit breaker.