см. подключать электропитание ; провода, по которым подается электропитание ; система электропитания
Then, gripping the rail with one hand, I removed the camera with the other from the bracket and disconnected it from the on-board electric mains .
I took the camera I had removed from the bracket of Soyuz-5 , mounted it on a special bracket near the hatch of Soyuz-5 and switched on power supply .