At the onset of the earthquake, the plant automatically shut down the fission process, which normally would leave the coolant system — both the main one and a backup generator — still operational.

地震发生时，核电站已经自动中止裂变反应过程，一般只剩下冷却系统——主发电机和备用发电机——仍处于运行状态。

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Due to the merit of small volume, light weight and low cost, mobile generator is widely used as backup or mobile power supply.

移动发电机具有体积小、重量轻、成本低等优点，被广泛应用在需要备用和移动电源的场合。

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Lifter The generator set has design of electromotion takeup, to take up convenient tool and backup.

提升机机组设计了电动提升装置，方便工具及备件的提升。

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It also has a backup generator in place so its main New York trading floors can operate on Monday.

WSJ: Wall Street Braces for a

With a backup generator, Mr. Zimmermann said he expects to work from home for the next two or three days.

WSJ: Idled Stock and Bond Traders Watch, Wait and Position

An emergency backup generator is only allowed to operate for 200 hours every year and only in the event of an emergency power failure or for routine testing and maintenance.

FORBES: Backup Generators Are the Bad and Ugly of Decentralized Energy