zct - An Overview
zct - An Overview
Blog Article
零相変流器の単線結線図では記号に３が書いてありますが、この意味はこの接続法を表しています。
Now, the greater crucial make any difference will be to understand why we use this ring on the present-day transformer. Just before that we want to comprehend the explanation of core harmony latest transformer vs latest transformer.
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This functionality is vital for accurate present measurement and program safety, making certain that monitoring gadgets and protective relays operate correctly with out getting exposed to large existing amounts.
Choice of CBCT or ZCT The following conditions are accustomed to choose the finest zero sequence CT or CBCT. Nominal CT ratio: This should be established to ensure, even in the case of a insignificant ground fault, There's more than enough existing to operate an earth fault relay.
変流器は、高圧や特別高圧の回路で大電流が主回路に流れる時、その電流を扱いやすい大きさに変換する機械です。この変流器は多くの箇所で様々な用途で使われています。目的によって選定する機器は変わりますし、使い方によって結線が変わります。ここでは、そ...
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したがって、通常状態（事故が生じていない）では変流器の２次側には電流は流れていません。電流の不平衡があっても、地絡事故が起きていない限りベクトル合成すると打ち消している状態になりますので、ＺＣＴ２次には電流は流れません。
ところが零相変流器では３相分（交流は通常３相交流で送電されています）の電線を一括して変流器に通しています。このように変流器に電線を通すと２次側にはどのような電流が流れるのでしょうか。
Ground Fault Detection: Among the main purposes with the HY-ZCT is ground fault detection. By measuring zero sequence present, these transformers can determine the website existence of floor faults, which take place when existing flows from a period conductor to ground.
Core Balance Recent Transformer (CBCT) or Zero Sequence Present Transformer (ZCT) is actually a Exclusive constructed recent transformer by using a form of ring, used to detect the zero sequence existing through faults (such as quick circuit fault or floor fault) that generates an unbalanced within our 3 period program.
This coordination helps isolate defective parts of the system, reducing downtime and preserving devices from problems.
Rct - secondary winding d.c. resistance at specified temperature Rb - rated resistive load in the relay R’b - Rleads + Rrelay; This really is thel connected stress CTs will need in order to provide the necessary existing to generate the relays in the course of transient fault situations.