...itivity of each protecting device and breaker Instruction Manual---17/18 投入试运行 投入试运行 Put into trial operation 空载试运行，变压器应由电源侧接入电压后，如有条件由零点徐徐上升至额定电压， 也可用电压冲击合闸。
"Egypt is requesting an investigation into the circumstances of the operation and for those responsible to be put on trial, " it quoted Egyptian Foreign Minister Mohammed Kamel Amr as saying.