予備電源(よびでんげん)

よびでんげん
noun
backup power source; emergency power supply
technicalelectronics
1. backup power source; emergency power supply
A secondary power source that activates when the main power supply fails, such as generators, battery packs, or UPS systems, used in buildings, hospitals, data centers, and for disaster preparedness.
予備電源(よびでんげん)を確保(かくほ)しておく。
Keep a backup power source secured.
停電(ていでん)のときは予備電源(よびでんげん)に自動的(じどうてき)に切(き)り替(か)わる。
During a power outage, it automatically switches to the backup power source.
病院(びょういん)では患者(かんじゃ)の安全(あんぜん)のために、予備電源(よびでんげん)の定期的(ていきてき)な点検(てんけん)が義務(ぎむ)付(づ)けられている。
Hospitals are required to conduct regular inspections of backup power supplies for patient safety.

Compound of 予備(よび) (reserve; backup) and 電源(でんげん) (power source; power supply). Disaster preparedness is a major concern in Japan, making 予備電源(よびでんげん) a commonly discussed topic in both institutional and household contexts.

Common collocations

Similar words

  • 非常用電源(ひじょうようでんげん): emergency power supply (emphasizes emergency use)
  • 無停電電源装置(むていでんでんげんそうち): uninterruptible power supply (UPS)
  • 自家発電(じかはつでん): private power generation, using one's own generator
  • モバイルバッテリー: portable battery / power bank (for personal devices)

Related Words

Compare: モバイルバッテリー (portable battery / power bank)
general
Added 2026.4.21 23:26 · Revised 2026.9.2 13:02
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