当电网发生振荡时,对于可能误动的距离保护Ⅰ、Ⅱ段,其开放时间应不大于0.15秒,其振荡闭锁复归时间不应小于1.5秒。()
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Which of the following operations need to be entered on the Oil Record Book Part I? () (1) Ballast of fuel oil tanks (2) Condition of oil discharge monitoring and control system
A. (1)only
B. (2)only
C. both(1)and(2)
D. neither(1)nor(2)