对常用的应急电源装置：自备柴油发电机组、不间断电源装置UPS和应急电源装置EPS容量选择的方法、依据进行了论述。
It elaborates over the method and the reasons to choose the regular emergency power facilities-self-provided diesel generator unit, uninterrupted power source (UPS) and emergency power source (EPS).
可根据用户要求配置应急装置，当应急电源断开时，灯具自动切换至应急照明状态。
The emergency device can be equipped at the request of users, when the emergency power supply breaks , the lamp will switch to the emergency illuminating state automatically.
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