强油循环风冷变压器,在运行中,当冷却系统发生故障切除全部冷却器时,变压器在额定负

资格题库2022-08-02  30

问题 强油循环风冷变压器,在运行中,当冷却系统发生故障切除全部冷却器时,变压器在额定负载下可运行20min。20min以后,当油面温度尚未达到(    )℃时,允许上升到(    )℃,但冷却器全停的最长运行时间不得超过(    )。75,75,1h$;$75,80,0.5h$;$80,75,0.5h$;$80,80,0.5h

选项 75,75,1h$;$75,80,0.5h$;$80,75,0.5h$;$80,80,0.5h

答案 A

解析
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