…When trading electrical equipment, it is difficult to measure efficiency by testing at full load due to limitations in testing equipment, so the loss is often measured or calculated using methods specified in standards, and the efficiency is calculated from this. In this case, the efficiency is called the standard efficiency. For distribution transformers, the efficiency during operation changes from moment to moment due to fluctuations in the load over a 24-hour period, so the ratio of the energy extracted from the transformer to the energy supplied to the transformer over the course of a day is considered important, and this is called the all-day efficiency. … *Some of the terminology explanations that mention "contract efficiency" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…電気機器の取引に際しては,試験設備の制約から全負荷で試験して効率を測定することが困難であるため,規格などで定められた方法によって損失を測定または算定し,これから効率を算出することが多い。この場合の効率を規約効率という。配電用の変圧器では,24時間中の負荷の変動によって運転時の効率が刻々変化するので,1日全体として変圧器から取り出されたエネルギーと変圧器に供給されたエネルギーとの比が重要視され,これを全日効率という。… ※「規約効率」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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