1 Device series DS71.14 Function26 DS7 Soft starter 09/16 MN03901001Z-EN www.eaton.com1.14 FunctionDS7 soft starters use phase control for controlling the voltage of the supplynetwork smoothly from an adjustable start value up to 100 % of the ratedvalue ULN . This voltage control enables the inrush current of a three-phaseasynchronous motor to be limited and its starting torque to be considerablyreduced. This enables a smooth and jerk-free increase in torque, adjusted tothe load behavior of the machine.Figure 10: Function charta Mains supply voltage ULN 3 × 200 V bis 3 × 480 Vb Antiparallel thyristors in two phases with bypass contact for controlling the motor voltagec Output voltage U2: three-phase, from an adjustable start voltage to 100% mains voltage with the use of aramp function at a constant line frequencyOutput current I2N : 4 - 200 A at a maximum ambient air temperature of +40 °CRated motor shaft output P2: 1.5 - 110 kW with 400 or 3 - 150 HP with 480 Vd Controller card for controlling the power sectionThis is used to initiate control commands and set the parameters.e SmartWire-DT interface (optional) for configuring parameters and for control and monitoring￫ The following limitations apply to single-phase AC motors:① ULN : 1 x 200 - 240 V③ Output current I2N : 4 - 32 ARated motor shaft output P2 with 230 V: 0.37 - 4 kW or 1/3 - 5 HP①②③④⑤M3 ∼
