1  Overview  Issue 10/06 
  MICROMASTER 440      Operating Instructions 
18  6SE6400-5AW00-0BP0 
 
1.1  The MICROMASTER 440 
The MICROMASTER 440 are frequency inverters for speed and torque control of 
three-phase motors. The various models available cover the performance range 
from 120 W to 200 kW (for constant torque (CT), alternatively up to 250kW (for 
variable torque (VT)). 
The inverters are microprocessor-controlled and use state-of-the-art Insulated Gate 
BipoIar Transistor (IGBT) technology. This makes them reliable and versatile. A 
special pulse-width modulation method with selectable Pulse frequency permits 
quiet motor operation. Comprehensive protective functions provide excellent 
inverter and motor protection. 
With the factory default settings, the MICROMASTER 440 is suitable for many 
variable speed applications.  Using the functionally grouped parameters, the 
MICROMASTER 440 can adapted to more demanding applications. 
The MICROMASTER 440 can be used in both 'stand-alone' applications as well as 
being integrated into 'Automation Systems'.