| 摘要 |
PURPOSE: A cross arm for supporting overhead wire installed on the electric pole is provided to resolve the weak bonding between an insulator supporting unit and an insulator connecting unit, or an insulator connecting unit and an insulator, thereby stably fixing the power distributing wire. CONSTITUTION: A support unit includes a horizontal groove and a vertical hole. A weathercock includes a rotary shaft and a hemisphere installed in the rotary shaft. A control unit outputs an emergency signal by comparing an electromotive force with a reference value. A transmitting unit transmits the emergency signal received from the control unit to outside. An insulator supporting unit(50) includes a slot hole(51), and a settling groove(52). |
