It is not uncommon to need to connect an air conditioner that is powered by 220V and our network is 110V or 120V. There are a few solutions for this. The first and undoubtedly best solution is to ask the local energy provider to change the network from 127V to 220V. However, this modification may not be possible or the owner simply does not want to bear the cost of this modification. The alternative is to install a step-up transformer to increase the voltage from 127V to 220V. But how do you size the transformer for this air conditioner? To do this sizing, we will need to know the apparent power of the air conditioner, because the transformer is specified by the primary and secondary voltage and also by the apparent power. With the apparent power of the air conditioner calculated, we cannot buy an air conditioner with a power close to that of this air conditioner. Every transformer has losses that must be considered. It is also not recommended that the transformer work very close to its maximum power because this can cause some problems, such as excessive heating, for example. To specify a transformer for air conditioning, we must predict that it will operate at a maximum of 70% of its capacity. With this apparent power of the air, we will consider that it is 70% and we need to make a rule of 3 to find what 100% of this capacity would be. Now that we have calculated the predicted slack for the transformer, we will also calculate the losses in it. To do this, we will consider a loss of 10% of its power, which may be due to the heat generated and losses in the iron. By making another rule of 3, we can calculate the value of the transformer considering these losses. This way, we can size a transformer for air conditioning. Remember that we probably won't find a transformer on the market with the same value that we calculated, so we must buy one that has a power above the calculated one. So, guys, let's learn more about how to size a transformer for air conditioning in this video. Don't forget to share the video: • How to Size TRANSFORMER for A... ___________________________________________________________________________________ ⚠️ For those who don't know me, my name is Renato and I am a control and automation engineer and a graduate in electrical engineering, but initially my training is as an electronic maintenance electrician at Senai, throughout these 17 years of work in the area of ​​electricity, electronics and automation, I was able to acquire experience that helped me a lot in my work and now I would like to share this knowledge that I acquired throughout this journey to help you and also continue learning more and more with you too. ✔️ If you liked our channel, subscribe and help us grow and bring valuable content to more and more people. ???? A big hug and see you in the next videos.