C87とは 意味・読み方・使い方

Breakers 48 and 50 and a protector (C87 relay) are provided in a protected section of a transmissions system using a cable 49 for a transmission line, and the accident of the transmission system is detected by a differential current protective system thereby protecting the transmission line.例文帳に追加

送電線にケーブル４９を用いる送電系統の保護区間に遮断器４８，５０と保護装置（Ｃ８７リレー）を設け、差電流保護方式によって送電系統の事故を検出して送電線を保護する。 - 特許庁

The C87 relay is provided with a communication device which transfers positive/negative ON-OFF data for judging the existence of a zero-phase current and transmission abnormality, and it calculates the differential current of the above zero-phase current, and also judges the rationality of the above positive or negative ON-OFF data.例文帳に追加

Ｃ８７リレーは零相電流と伝送異常の有無を判定するための正負のＯＮ−ＯＦＦデータを送受する通信装置を設け、前記零相電流の差電流演算を行うと共に、前記正負のＯＮ−ＯＦＦデータの合理判定を行う。 - 特許庁