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。
この地絡電流が流れ続けているところで、零相変流器へ流れる電流をご覧下さい。零相変流器のところを流れる電流のバランスがくずれています。これによって零相変流器２次側には電流が流れるということです。
Comparing, equation (5) with equation (three) we acquired that the Web magnetic flux from the core of CBCT won't be zero. It's some finite worth which will induce current during the secondary circuit of ZCT.
Detection of unbalanced present: ZCT is meant to measure the unbalanced present-day in a three-period electrical method, and that is the sum in the a few phase currents.
IEC 60044 specifies the requirements for cover CTs (Besides measuring CT's, VTs and electronic sensors). The true secret to CT dimensioning under the standard, could be the symmetrical limited circuit present and transient dimensioning factors:
電流には必ず行きと帰りがあり、通常その電流の大きさは同じになります。しかし地絡が発生すると、電流が正常な回路を通らずに大地を通って帰っていきます。これを漏電とも表します。
네이버 여행 서비스를 이용해 주신 여러분께 감사드리며, 더 좋은 서비스로 보답할 수 있도록 노력하겠습니다.
Assuming that CBCT is working from the linear region, then the magnetic flux designed within the Main of CBCT is going to be right proportional to its corresponding line present. For this reason it can be composed as:
何らかの原因で３相の電流のバランスが乱れると、コイルに二次電流が瞬間的に流れ、地絡として検出されます。
Steven McFadyen Steven has about 20 5 years experience working on a number of the premier design jobs. He has a deep technical idea of click here electrical engineering and is particularly eager to share this expertise.
For an improved knowledge, We're going to seek to set all the things we have read above right into a mathematical idea.
The earthing qualified prospects from your cable sheath to earth and have to be taken through the eye of your ZCT core. A typical diagram is as proven from the down below determine.
Epoxy resin casting encapsulation, potent insulation and isolation capacity, humidity evidence and seismic resistance;
Some strategies regarding how to use hysteresis loop qualities during the manufacture of recent transformers Some solutions on how to use hysteresis loop attributes within the manufacture of latest transformers A present-day transformer (CT) is an electrical device accustomed to measure or keep an eye on alternating present (AC) in a power process. Its operating principle is based on using the hysteresis attributes of magnetic resources