DOES A 380V MOTOR CONNECTED TO 220V WORK?

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ELETRICITY - O CANAL DA ELÉTRICA

Published on Sep 23, 2023
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What happens if I connect a motor with a 380V closing to a 220V network? Did you know that this is a feature widely used in starting electric motors? Let's see all this in practice and with a diagram? _________________________________________________ Access the website below to learn more about the SIEMENS command and protection line: ???? https://bit.ly/linha-comando-proteção _________________________________________________ Download the Star-Delta starting diagram at the link below: ???? https://bit.ly/diagrama-estrela-trian... _________________________________________________ Receive Eletricity content straight to your email! Register using the link below: ???? https://bit.ly/cadastro-eletricity __________________________________________________ ???? Check out our content ???? ???? https://linktr.ee/Eletricity __________________________________________________ A three-phase electric motor with 5HP and a service factor of 1.15 can be connected to a 220V or 380V network, simply by changing the connection of the coils. We have 3 coils identified according to the diagram and according to the motor plate data we find the type of connection according to the supply voltage. If we are going to connect to 220V, we join 2 and 4, 3 and 5, 1 and 6. This connection is known as a triangle. We turn on our motor and it works perfectly. If we are going to connect to 380V, the configuration changes and now we join 4, 5 and 6 and connect the phases to 1, 2 and 3. This connection is known as a star. Let's then feed our motor, which is closed to 380V, into 220V and see what happens. We have a reduction in the current value, since we are applying a much lower voltage than the one for which the motor was designed. Did you know that it is possible to use this characteristic to our advantage? Electric motors have a very high starting current. If we analyze the data on the nameplate of our motor, we notice that the current for 220V would be 14A and the starting current is 7.6 times greater. This means that, at the start, in a short space of time, we have more than 100A. The impact of this current value on the electrical network can cause a series of problems. The most cost-effective solution for reducing motor starting current is the star-delta switch, which has this name because of the connections that are made and works exactly with the concept of our experiment, that is, we close a motor in a star-type circuit, for a voltage higher than the mains voltage. In our case, we close it to 380V and connect it to a 220V mains, so that the current and torque are reduced during starting. Once the motor is spinning, the connection is changed to a triangle connection. With the voltage compatible with the closing, 220V, the motor works with the nominal current without causing an impact on the electrical network, since it will already be spinning. Access the link at the beginning of this description, download the SIEMENS catalog and have access to all the products necessary for connecting a star-delta starter. Have you ever sizing and assembling a star-delta starter? Was the information provided in this video clear and would it be enough for you to perform this type of assembly? Leave your opinion in the comments, as it is very important. Thank you very much for following the Eletricity channel and see you next time! ???? Check out #eletricity and #siemens????

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