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They are used for starting three-phase asynchronous motors and are designed so that a voltage drop of 30% of the network value occurs at the terminals. Consequently, the starting current is also reduced by approximately the same amount. The sizing is designed for 6 starts per hour, with each start lasting about 30 seconds, and a maximum of 2 consecutive starts.

Automatic Determination of Drop Point and Softening Point A drop point system is an analytical instrument used to determine the drop point and softening point of substances such as fats, pitch, polymers, and more. The drop point is the temperature at which the first drop of melted substance falls. The softening point is the temperature at which the melted substance flows a given distance. METTLER TOLEDO's drop point system automatically determines both the drop and softening points.