Among the offers, there are power generators of ~ 9’000 KW which are able to take a maximum of 33% of this power as maximal starting load, which makes 3’000 kW. Our wish is to limit to 2 the number of power generators needed to start 1 cement mill. That would mean that the need of power for starting the 8 mW cement mill should be limited to ~ 6’000 kW (2 x 3’000 kW). Therefore, it is necessary that the 2 motors of each cement mill and their liquid starter are dimensioned and designed to fulfill this condition.