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Message: <blockquote data-quote="cvally007" data-source="post: 23964527" data-attributes="member: 130011">3 ෆේස් එවට කන්ඩෙන්සර් නෑ පොලරයිස් වෙන්න ... ඒ හින්ද සිංගල් ෆේස් එකකින් කරකවන්න බෑ...                                                                                                    In  three phase power line, each phase is 120 degree from the other  phase.therefore, when we draw a graph of phases then two phases have  positive values then at the same time the third one has negative value  so we can calculate and use only two phases at a time.all three phases  changes their position every time so the two phase may be phases 1  &2/phases 1&3 or phases 2&3 gives the values and at the same  times phase 3 or 2 or 1 will be at negative interval respectively so  cannot be calculated or contribute the value. that's the reason we use  440v instead of 660v<a href="https://www.youth4work.com/Talent/Electrical-Engineering/Forum/112741-single-phase-line-called-240v-while-3-phase-440v-why" target="_blank">https://www.youth4work.com/Talent/Electrical-Engineering/Forum/112741-single-phase-line-called-240v-while-3-phase-440v-why</a></blockquote>

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