Soft starting of the motor voltage

1  Direct-on-line starting 2  Star-delta starting 3  Soft starting

With the softstarter, gating control is used to reduce the motor voltage, which is then, within a predetermined ramp-up time t_START raised to the mains voltage from a settable starting voltage (U_START). In this way, the smooth starting and stopping of the motor protects the mechanical devices connected to it from being subjected to the load with a jolt, and it prevents current peaks and therefore voltage dips in the electrical supply network.

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