Soft Starter DS7
The DS7 is Eaton's solution for judder-free motor starts with power network protection. It is the perfect alternative to direct-on-line or star-delta motor starting. With the three phase motor currently the optimum drive for simple and cost effective machine and system building, the DS7 is the ideal solution.
Softstarter DS7 with SmartWire-DT
SmartWire-DT reduces the wiring effort and expense on many switchgear systems by as much as 85% - a cost-effective and simple wiring solution.
The motor starter from the standard range
The soft starter DS7 is connected to the motor-protective circuit-breaker PKZ by a tool-less and plug-in assembly process. The soft starter DS7 is powered via the SmartWire-DT power lines.
Additional features in conjunction with the motor-protective circuit-breakers with electronic wide-range overload protection PKE:
230 – 480 V ±10 %, 50/60 Hz
24 V AC/DC / 110 – 230 V AC
4 – 32 A (1,5 – 15 kW at 400 V)
The reduction of peak-currents and the lower wear of the machine ensures that you get the following comparison between conventional solutions, Soft Starters and Frequency Inverters.
Service costs include costs for device change of aged contactors, belts and gear boxes as well as the cost for different peak load costs.
Motor voltage – soft start
With the soft starter, gating control is used to reduce the motor voltage, then within a predetermined ramp-up time (tSTART), is raised to the mains voltage from an easily-set starting voltage (USTART). 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.
Motor torque – reduced load
Motor current – damping current peaks