Central cooling systems, the so-called “District Cooling Plants” are always installed in the vicinity of the consumers. This goes hand in hand with a low mains connection power and at the same time the strict specifications of the network operators have to be strictly observed. These mean that the starting currents of the large motors have to be substantially reduced of the cooling compressors, so that no other consumers are disturbed by possible voltage drops during the start.
The electronic soft starters have proven themselves here and are used worldwide.
In addition to limiting the starting currents, the mechanical stress on the mechanical drive train is also reduced, thereby extending the service and maintenance intervals of the compressors.