如果现场电源失效，对反应堆冷却系统的控制是非常有限的。

If all AC power is lost, the options to cool the core are limited.

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济南发光字失效一是来源于电源和驱动的失效，二是来源于LED器件自身的失效。

Ji 'nan luminous word failure comes from the failure of power supply and driver, and the two comes from the failure of LED devices.

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可以对温度控制装置进行人工设置，可根据设定的温度自动开关电源。本款电热水器还在工厂就预先安装了能够在温度控制装置失效的情况下切断全部电源的装置。

The temperature limiting device is of the manual reset, trip-free type and has been factory installed to interrupt all ungrounded power supply conductors in the event of thermostat failure.

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