Siemens Variable Speed Starter, 710 kW, 3 Phase, 693 A, 3RW40 Series

In addition to soft starting and soft ramp down, the solid state SIRIUS 3RW44 soft starters provide numerous functions for higher level requirements. They are characterized by a compact space saving design and clearly arranged control cabinet layouts. The new torque control and adjustable current limiting enable these soft starters to be used in nearly every conceivable task and guarantee the reliable avoidance of sudden torque applications and current peaks during motor starting and stopping.

Soft starting with breakaway pulse, torque control or voltage ramp, adjustable torque or current limiting as well as any combination of these, depending on load type
Integrated bypass contact system to minimize power loss
Various setting options for the starting parameters such as starting torque, starting voltage, ramp up and ramp down time, and much more in three separate parameter sets
Start up detection
Inside delta circuit for savings in terms of size and equipment costs
Various ramp down modes selectable: free ramp down, torque controlled pump ramp down, combined DC braking
Solid state motor overload and intrinsic device protection
Thermistor motor protection
Keypad with a menu prompted, multi-line graphic display with background lighting
Interface for communication with the PC for more accurate setting of the parameters as well as for control and monitoring
Simple adaptation to the motor feeder
Simple mounting and commissioning
Display of operating states and fault messages
External displays and operator modules

IEC 60947-4-2

UL/CSA