YOU SAID:

This need to calculate fault currents has excited for a long time but the launch of former has made it necessary to re-vist an old electrotechnical problem

INTO JAPANESE

故障電流を計算する必要性は長い間高まってきましたが、故障電流の導入により、古い電気技術的問題を再検討する必要が出てきました。

BACK INTO ENGLISH

The need to calculate fault currents has been growing for a long time, and the introduction of fault currents has made it necessary to revisit old electrotechnical problems.

INTO JAPANESE

故障電流を計算する必要性は長い間高まっており、故障電流の導入により古い電気技術的問題を再検討する必要がありました。

BACK INTO ENGLISH

The need to calculate fault currents has been growing for a long time, and the introduction of fault currents has made it necessary to revisit old electrotechnical problems.