In English, "VoltageDrop" means voltage drop, and "drop" means "pull down". The voltage drop of the power line is due to the resistance of the conductor. Because of this, no matter what kind of material (copper / aluminum) the conductor uses, it will cause a certain voltage loss of the line, and this kind of loss (voltage drop) is not greater than 5% of its own voltage generally will not have consequences for the electric drive of the line.
For example, for 380V lines, if the voltage drops to 19v, that is, the circuit voltage is not less than 361v, there will be no big problem. Of course, we hope that the smaller the pressure drop, the better. Because the pressure room itself is a kind of power loss, although it is inevitable, we always hope that the pressure drop is in an acceptable range.