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。
is pretty uncomplicated to grasp and pertains to the liner percentage of a CT characteristic. The voltage and current across a CT are linear only up until a certain worth (normally specified to be a several of your nominal score), and then the CT will saturate and also the curve will degree off.
零相変流器の二次側に電流が流れる時は、３相の電流のバランスが崩れて、打ち消すことができない時となります。なぜバランスがくずれるのでしょうか。それは、電気回路に１線地絡事故（３相の電線のうち１本の電線から電気が大地に流れた状態）が発生したときということになります。
"Safety" CT's are made in order to retain precision at existing ranges far in surplus of their nominal values, generally 20 periods nominal, so as to insure appropriate illustration of currents beneath fault problems.
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。
Accuracy: ZCT is made to supply correct measurements in the zero-sequence ingredient of the present, even during the presence of large amounts of sound or interference.
ช่วยให้คุณสะดวกสบาย ไม่ต้องคอยเปิด-ปิดเครื่องใช้ไฟฟ้าด้วยตัวคุณเอง วิธีใช้งาน คำแนะนำ ข้อควรระวัง คุณสมบัติ
A ZCT is installed from the Neutral-Earth bonding conductor. It'll initiate a visit only when neutral current is returned because of the Protective Earth conductor as an alternative to the load neutral conductor. This generally happens when There may be phase-earth leakage (or fault). This safety only is effective more info efficiently in Immediate earthed installations (not MEN).
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そのためあらかじめ漏電遮断器に内蔵され、絶えず事故検知の役割を担っています。 零相変流器の使用用途
Floor Fault Detection: Among the list of main purposes on the HY-ZCT is floor fault detection. By measuring zero sequence present-day, these transformers can discover the presence of floor faults, which come about when present-day flows from a period conductor to ground.
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Is it residual stage input or individual CT enter. The "ZCT" or residual will always see the imbalance and also the phase to ground fault recent, but This is often also imbalance.
Because we've been working with the current transformer, We're going to try and apply Kirchhoff’s Current Legislation here. Given that A 3 phase system is a three AC present-day with shifted phase. Through the KCL, we know that: