Soft starter, +interface SWD, 3p, 16A, 200-480VAC, us=24VAC/DC

The types of the DS7 series are soft starters for gently starting three-phase current motors for applications with normal operating frequency and a performance range of 4 to 200 A (1.5 kW to 110 kW at 400 V). Starting transients and DC components during startup are effectively suppressed and guarantee even motor starting. the special actuation method (asymmetrical trigger phase control / Eaton patent) for the soft starter function avoids the DC components that would normally occur in two-phase-controlled soft starters. This suppresses the generation of an elliptical rotating field, which would cause uneven motor starting and increase the motor’s acceleration. the true run behavior of the DS7 is therefore comparable with a three-phase controlled soft starter.All versions allow a significant reduction of the inrush current for lamps and heaters (with an unearthed star point) by setting a short soft start ramp time (at least 1 s).The ramp times and the start voltage can be set via potentiometer. the times can be varied from 1 to 30 s (start) or 0 to 30 s (stop), the starting voltage (starting torque) can be adjusted in the range of 30 – 100% mains voltage.Internal bypass relay in DS7-34D…D types: switches on automatically after the end of the ramp, bypassing the internal thyristors. This function provides radio interference level “B” in continuous operation without additional measures. moreover, this type is equipped with a SmartWire-DT interface with which the DS7 can be completely control and configured. All parameters can be accessed, the potentiometer settings can be overwritten. Additional functions are available in combination with a PKE that can be connected directly. This combination disposes of a device protection against frequent switching or too many starts per hour or an overloading by the application. the current limiting function is also available and can limit the motor current to an adjustable value. Moreover, all DS7-34D…D offer a significant enhancement of the diagnostics function compared to a conventionally wired device. Next to the fault-free wiring, the significantly reduced installation costs also speak for this type.Typical fields of application for the soft starter: pump drive pressure surges are avoided by the soft start. the mechanical load on the whole plant is reduced and its service life increases.Fan drives-Soft starting prevents drive belt slippage and premature wear premature wear is suppressed. This reduces operating costs and extends service life. Conveyors—the conveyor belt starts up gently instead of with a jerk. The conveyed goods do not fall over, the mechanical stress on the conveyor is reduced and its lifespan is increased.