Soft-Starters are static starters that accelerate, decelerate and protect three-phase induction motors. The control of the voltage applied to the motor by means of adjustments to the firing angle of thyristors allows the soft-starter to start and stop an electric motor smoothly.
With adequate adjustments of the variables, the torque produced is adjusted to the needs of the load, so that the required current is going to be the lowest possible for the starting procedure.
Soft-Starters are micro processed, fully digital, state-of-the-art technology products designed to ensure the best starting and stopping performance of induction motors, presenting itself as a complete and low-cost solution. The human-machine interface allows easy adjustment of the parameters which helps set up and operation.
The soft-starter line is top-notch in motor starting and stopping with features that allow the starting, stopping and protection of electric motors in an easy and efficient manner.

Comparison of electric motor start-up methods

The SSW-05 Plus Micro Soft-Starters, with DSP control (Digital Signal Processor) have been designed to supply excellent performance during starting and stopping of electric motors with an excellent cost/benefit ratio.
The Operator Interface allows easy parameter setting, simplifying the start-up and operation activities.
The SSW-05 Plus Micro Soft-Starters are compact, optimizating the space in electrical panels.
The SSW-05 Plus already incorporates protection for the driven motor.


* Reduction of stress on couplings and other transmission devices during starting (gear boxes, sheaves).
* Extended lifetime of motor and mechanical components due to reduced mechanical stress.
* Easy operation, programming and maintenance.
* Simple electrical wiring.
* Built-in bypass providing size reduction and energy saving.
* Operation in ambient up to 55°C (122°F).


* Bladed Vaccum Pumps
* Centrifugal Pumps
* Screw Compressor (Relief Start)
* Axial Fans (Low Inertia and Low Load


Windows-based software for setting parameters, control and monitoring SSW-05 Soft-Starters.
It allows setting parameters on-line directly to the Soft-Starters and/or setting of parameters off-line into a file.
Possibility to store user parameters from existent SSW-05 Soft-Starters.
The communication between the Soft-Starter and the computer is provided through RS-232 serial interface.