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1备自投装置动作应遵循的原则(1)备用电源自动投入装置的起动应能反应工作母线失电状态,当工作母线、变压器、电源线路故障或运行的断路器因某种原因自动跳闸时,将引起工作母线失压,这时备用电源应自动投入,以保证向用户不间断供电。(2)当备用电源失电时,备用电源自投装置应不动作,因为在这种情况下即使动作也没有实际意义。(3)备用电源必须等待故障网络切除后才能投入,否则有可能将备用电源投入到故障网络而引起故障的扩大。
(1) The starting of the automatic power-on device of standby power supply should reflect the power loss status of the working bus. When the working busbar, transformer, power circuit fault or the operating circuit breakers trip automatically due to some reason , Will cause the working bus to lose pressure, then standby power should be automatically put in to ensure uninterrupted power supply to users. (2) When the backup power source is out of power, the backup power source self-transmitting device shall not operate because even in this case there is no practical significance. (3) Standby power supply must wait for the fault network to cut off before it can be put into operation. Otherwise, it is possible to put the standby power into the faulty network and cause the fault to expand.