There are totally seven units of compressors and two bus bars at site,
3*1000kW motors are on busbar I, 4*1300kW motors are on busbar II.
Customer need to soft start these 7units of motors and transfer to grid.
In their former design, each busbar will be equipped with a frequency drives. VFD1 will drive 3units of 1000kW motors, VFD2 will drive 4units of 1300kW motors.
And the end user prefer to world top brands. But due to the urgent delivery time, they are looking for alternative solution.