Why 220v in some places and 127v in others? - Flash Tips ⚡ - Engehall Elétrica - World Latest Movie, Series, Videos and Trailers

Why 220v in some places and 127v in others? - Flash Tips ⚡

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Published on Dec 20, 2016

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⚡ FREE CLASS: How to Do a Complete Electrical Installation from Scratch, Easily, Even if You Are Not a Professional Electrician: ➽ https://eletr.co/aula?utm_content=iMn... -------------------------- ???? 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 -------------------------- Did you like this video? ???? ✔️ Leave your comment and share with friends ✔️ Follow our networks ➽ https://eletr.co/links?utm_content=iM... -------------------------- ???? NR10 Course with 20% discount ➽ https://eletr.co/nr10?utm_content=iMn... -------------------------- Why 220V in some places and 127V in others? Currently in Brazil, for residential and commercial consumers there are only two voltages, 127V and 220V, so the consumer asks himself: But where did this 110V come from? Some countries have this 110V voltage and even in Brazil it already existed in the past, but over time the concessionaires reached a consensus and standardized it at 127V. There is a natural variation when we try to measure the voltage of the alternating current grid. The utilities stipulate a maximum variation between 116V and 133V. All equipment manufactured in Brazil that has been tested and approved by Inmetro supports this voltage variation. But why is it 220V in some places and 127V in others? In Brazil, there was not just one general standard established for the voltage that reaches the outlets of companies and homes. At the beginning of the last century, when our electrical grid began to be assembled, several companies from different countries took over specific regions to implement the Electrical System. As a result, the standards of origin of each place contributed to the choice of 127V or 220V systems. The savings that a system could generate were also taken into account. All transmission and distribution network installations tend to be cheaper in terms of transformer and wiring costs with 220V. However, as we said, in most of the country 127V is used, for safety reasons. In the Southern and Northeastern states, the most common system is 220V, while in the Southeast, 127V predominates. In the Central-West, Goiás and the Federal District, only 220V is used; in Mato Grosso and Mato Grosso do Sul, as well as throughout the Northern region, only 127V outlets are found, except in hotels or airports. Well, if the voltage is 127V and not 110V, where does this 220V come from, which is apparently twice the voltage of 110V? 220V is an association between two phases of 127V, since the distribution system is three-phase, that is, composed of three phases of 127V, 220V is a result of 127V times 1.73 (this number is the square root of 3, this 3 because it is a three-phase system). When the effective voltage between phase and neutral is 220V, the voltage between two phases is 380V, and there is no possibility of obtaining 127V directly from the network. Now you know why it is 220V in some places and 127V in others! -----

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