Moeller Soft Starters   Compact soft starters: system features of DS4 and DS6 The three-phase motor is currently the optimum drive for simple and economic implementation of machine and system concepts. Nevertheless, a DOL start or a star-delta start is not always the best solution in many cases. If you want to avoid pressure hammers in pump systems, reduce starting currents with high inertias or judder free starting in conveyor systems, soft starters offer the gentle alternative for almost every application for judder free and power network protected motor starts. And they reduce the operating costs in the company in more ways than just one. Both the DS4 and DS6 series offer a complete product spectrum in the power range from 2.2 kW to 110 kW. The approvals with global standards make them devices suitable for world markets. Soft starter DM4: Communication-capable motor starter with internal motor protection function The high-value soft starter of the DM4 series can be individually matched to the demands of the respective application and provides soft starting in its most comfortable form. A determined reduction of the motor current in the start phase and an application specific parameterization guarantees optimum matching to the properties of the motor. The DM4 can be used with the "inline" connection method up to 500 kW or the "in-delta" connection method up to 900 kW. The integrated motor protection functions guarantee safe operation of your three-phase motor. Simple handling is guaranteed by the application selector switch with pre-settings for the 10 most frequent standard applications. The highest level of operating comfort is provided by the optional communication modules such as the keypad or the fieldbus connection to PROFIBUS DP.  Soft Starter Characteristics