If the rated current of the three-phase asynchronous motor is in = 10 A and the motor starts with load frequently, how many a should the rated current of the fuse link be selected? Please explain the reason Options: a.10a B, 15A C, 25A D, 50A e, 100A

If the rated current of the three-phase asynchronous motor is in = 10 A and the motor starts with load frequently, how many a should the rated current of the fuse link be selected? Please explain the reason Options: a.10a B, 15A C, 25A D, 50A e, 100A

C. The maximum rated current of the melt shall not exceed 3 times of the rated current of the motor

How to choose fuse when the rated current of load is known? How many times of the rated current of load or how much more than the rated current of load should the fuse fuse fuse fuse fuse fuse fuse fuse fuse fuse fuse fuse fuse fuse fuse fuse fuse fuse fuse fuse fuse fuse fuse fuse fuse fuse fuse fuse fuse fuse fuse fuse fuse fuse fuse fuse fuse fuse fuse fuse fuse fuse fuse fuse fuse fuse fuse fuse fuse?

Generally, the current below 4kw is 1.5-2 times that of 4kw - 11kw is 2 times that of 11kw is 2.5-7 times that of 11kw

Why is the voltage multiplied by the current on the motor nameplate not equal to the power indicated on the nameplate?

First, the power of the motor refers to the shaft power, which is smaller than the electric power, multiplied by the efficiency of the motor (generally about 95%)
Secondly, the power of the motor is related to the power factor. After the voltage * current, it is multiplied by a power factor cos φ (generally about 0.8 for three-phase motor and about 0.75 for single-phase motor)
In addition, the power of the three-phase motor is the sum of the power of each phase, and the phase power is the phase voltage * phase current * power factor * efficiency. The voltage on the motor nameplate is the line voltage, which is three times the root of the phase voltage
Therefore, the power calculation formula of three-phase motor is: P = 3 * (1 / radical 3) * u * I * cos φ * η = 1.732 * u * I * cos φ * η, in which u is the line voltage, that is, 380V
The power calculation formula of single-phase motor is: P = u * I * cos φ * η, in which u is the phase voltage, that is to say, 220 v