zct for Dummies
zct for Dummies
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This ring present transformer (CT) is handed by means of by just one a few phase procedure wire or 3 single section wires sort a three phase process.
The vector sum of a three-phase procedure’s period present (Ia + Ib + Ic = 0) is zero during standard Procedure. As a result, the first winding in the CBCT will not include things like any leftover zero sequence recent.
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。
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Main Harmony Present Transformer (CBCT) or Zero Sequence Existing Transformer (ZCT) can be a Particular constructed present-day transformer having a form of ring, used to detect the zero sequence present during faults (for example shorter circuit fault or ground fault) that generates an unbalanced inside our 3 stage procedure.
三相のいずれかに地絡電流が流れると、三相のバランスが崩れて零相電流はゼロとなりません。これにより地絡事故をただちに発見することができます。
電磁石 設計・製造技術により、優れた産業用・実験研究用電磁石を製作。設計は個別のご要望に沿って行なうことを特色としております。
これはケーブルのサイズ(誘導リアクタンスの関係)及び通電電流が関係してきます。
省エネルギーと脱炭素 カーボンニュートラルを達成し、二酸化炭素の排出を削減と吸収の技術について解説。
高圧ケーブルの絶縁物が劣化して地絡したとします。そうするとシールドが接地されているので、地絡電流はシールドを通って大地に流れます。
racobb (Electrical) eleven Nov 09 21:twelve I think your knowing is Completely wrong. A CT just measures current and it truly is your choice to ascertain what the CT is measuring and kind of relay you attach it to And just how you established the relay. Course is a selected variety of relay, not a CT functionality or CT design/connection.
Zero sequence present-day transformers are multipurpose of their software. They can be put in on personal phases of a few-section traces, handed by click here means of all a few-period conductors collectively, or placed on the neutral line. This overall flexibility permits them to correctly keep an eye on the vector sum of 3-phase currents:
サブ変電所で地絡保護をする場合で、シールドの接地がメイン受電所の場合。
The initial reason I designed this publish was that during a modern floor fault in the technique, we discovered that several of the relays were tripping incorrectly (or mysteriously), that is definitely, a lot of the upstream breakers were tripped pondering it absolutely was a ahead fault existing, when in actual fact, and we thought, it should be reverse (i.