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。
【エネルギー管理士】（電気分野）独学で突破できる勉強法と合格できない勉強法
In contrast, the overall section latest won't be zero under irregular situation. A zero sequence present will then move during the CBCT secondary circuit as the phase present-day is outside of balance.
Detection of unbalanced latest: ZCT is created to evaluate the unbalanced existing in A 3-phase electrical technique, that is the sum with the three stage currents.
This performance is vital for accurate present measurement and program protection, making sure that checking units and protective relays work properly without having getting exposed to substantial recent stages.
Dwelling / Situation Studies / The distinction between present transformer and zero sequence latest transformer The difference between latest transformer and zero sequence existing transformer
The Main stability current transformer (CBCT) is especially employed for earth fault protection of electrical equipment. Considered one of its critical applications is earth fault security of induction motors, that's mentioned below intimately.
A ZCT is put in within the Neutral-Earth bonding conductor. It can this website initiate a trip only when neutral recent is returned from the Protecting Earth conductor instead of the load neutral conductor. This commonly occurs when There exists section-earth leakage (or fault). This protection only performs effectively in Direct earthed installations (not Adult men).
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The first purpose of ZSCTs is to boost program safety by detecting faults, specially floor faults and leakage currents. When these types of faults occur, the ZSCT activates, cutting off the facility supply to prevent electrical shock dangers and devices hurt.
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Once the leakage recent with the CT Most important reaches a certain level, the CT secondary offers the necessary existing signal or voltage signal – based on the sort of protective relay in use – to the defense of the ability technique. EZ Collection
電気設備の保守管理の仕事に携わっています。専門知識ってネットでは出てこないか、難しすぎるって場合がおおくないですか？そこで私は電気関係の仕事で役立ちそうな情報を簡単に分かりやすく発信しています。