A soft starter for medium voltage drives.


Soft-starters for medium-voltage drives

With our soft-starters, you can easily master the power-limitation required during the start-up of medium-voltage drives.

Our soft-starters enable the start-up of high-power electrical drives–even on weak grid, simultaneously protecting the machine from premature wear and tear.


Max. rated voltage*: 12 kV

Max. rated current*: 1.4 kA

Applications: Induction or synchronous machines

Operating modes: Short-term or continuous operation

*Further information available on request


High-power machine starters can be controlled remotely via a field bus or a galvanic interface.

Parameters are conveniently adjusted with a web-browser panel.

Signal lamps mounted on the control compartment access panel provide rapid feedback on system status.

For commissioning, service, and diagnostics, a display panel is integrated into the access panel of the control compartment for a user-friendly visualization of operational modes and chronology.


Operator protection

Separate low-voltage compartment

A dedicated low-voltage compartment for system control is completely sealed off from the medium-voltage equipment. Access of this compartment is possible during operation.

Galvanic isolation

Isolation is provided between the high-power equipment and controls via fiber-optic connections.

Latching push-knobs

Prevent inadvertant opening of access panels.

Type-tested enclosure system

The power equipment is housed in type-tested medium-voltage enclosures.

Emergency stop

External and on the compartment access panel.

Access panel monitoring

Emergency stop if the panel is opened.




Integrated machine protection

Modular switch panels

Expandable field automation, machine monitoring

Extended user controls for singular installations or drive groups, up to and including the supervisory SCADA system

Communications interfaces PROFINET, MODBUS TCP, IEC 60870-5-104, IEC 61850, etc.

Further options available on request