３相分の電流を一括して変流器に通すと、３相分の電流をベクトル合成した電流が２次側に流れます。ベクトル合成された電流はどうなるのでしょうか？実は対称３相交流３相分の電流を合成させると”０”になるのです。対称３相交流は、各相とも同じ大きさでそれぞれが１２０°ずつ位相がずれているのでこのようになります。
In this manner, we will not locate any remainder of zero sequence present-day within the CBCT Principal winding. As it is really a balanced 3 section, there will not be any flux generated while in the CBCT Main. Thus, the current inside the secondary winding is zero.
Electrical Engineering What's the method for calculating short circuit existing in a power system?
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Nominal CT ratio, ensuring that the current is enough to run the earth fault relay regardless of whether the bottom fault is very small.
Choice of CBCT or ZCT The subsequent standards are accustomed to pick the finest zero sequence CT or CBCT. Nominal CT ratio: This should be set so that, even in the situation of a insignificant floor fault, There exists sufficient present-day to run an earth fault relay.
Existing transformers are intended to change substantial Key currents into workable secondary currents by way of a specified transformation ratio. By way of example, a CT that has a four hundred/5 ratio can remodel an real present of 400A down to 5A.
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Many approaches exist to dimensions present-day transformers. This Take note will look at several methods, with particular interest becoming paid to security course CTs sized in IEC 60044, which happens to be adopted internationally.
なお、下の記事は私（管理人）が書いた超概念的な内容です。もっと理論的な解説は鹿の骨さんが下さった以下を参照ください。
計測器 【道具の正しい使い方】電気屋の命を守る道具！検電器の使い方
상세한 안내를 받고 싶으신 경우 네이버 고객센터로 문의주시면 도움드리도록 하겠습니다. 건강한 인터넷 환경을 만들어 나갈 수 있도록 고객님의 많은 관심과 협조를 부탁드립니다.
Due to the fact we are managing The existing transformer, we will try and implement Kirchhoff’s Existing Regulation here. Considering that A 3 section method is A 3 AC latest with shifted section. In the website KCL, we are aware that: