On the other hand, the transient characteristics of the HVDC line fault and thus the line protections are affected by the HVDC control system, which is very complicated and still a hard nut to crush.
Such carriage is supported by the drive but and is fixed with a drive device controlled by the control box, such drive device is linked with the drive nut;
轿厢上设有由控制箱控制的驱动装置，驱动装置与驱动螺母联动；
3
The process see chart 7 Firstly, release the pressure of control valve, and disassemble control pipeline and loosen connecting nut before take out the actuator.