MVS Soft Starter

Integrated Control & Protection

MVS Soft Starter

AuCom's MVS medium voltage soft starters are an integrated solution for motor control and protection. MVS soft starters feature advanced soft start and soft stop functionality with extensive motor and system protection, plus a user-friendly interface and complete commissioning diagnostics.

MVS soft starters provide integrated motor starting and monitoring functions for the most demanding industrial situations. Advanced algorithms ensure ultra-smooth starting and stopping, and fully adjustable protection features maximise electrical and mechanical protection for your motor and system. A large-format display and detailed performance logs make setup and operation simple.

Model Light Duty Normal Duty Heavy Duty Severe Duty
MVS-0080 96 A 80 A 72 A 59 A
MVS-0159 190 A 159 A 143 A 117 A
MVS-0230 282 A 230 A 201 A 165 A
MVS-0321 393 A 321 A 279 A 229 A

MVS Soft Starter Key Features


Installing and commissioning medium voltage equipment can be an involved and complicated process, and may interrupt your normal operation. To minimise the disruption, the MVS incorporates extensive operating simulations and allows the starter to be tested with a low voltage motor, to confirm circuit integrity and identify any errors before full commissioning. As well as a comprehensive running simulation, the MVS can simulate each protection to ensure the starter is signalling as expected and interacting correctly with associated equipment.


The MVS incorporates extra features to ensure personnel safety when working in the dangerous MV environment. Air insulation assures long-term reliability, and communication between the low voltage controller and the high voltage power assembly is via fibre-optic cables, for complete electrical isolation. Enclosed units designed by AuCom include additional physical isolation and safety interlocks, for maximum safety.

Interface Features

The MVS has a large, real-language display, offering extensive feedback and performance information in an easy-to-read format. The controller can be mounted up to 3 metres away from the unit, reducing the need for separate meters and status indicators.

The MVS stores comprehensive information on the starter's operating history, in separate event and trip logs. Different status screens let you display the information most relevant to your application, or you can configure the programmable monitoring screen to show the information most relevant to your application.


A wide range of protection features ensure your equipment can operate safely in the most demanding environments. Each protection can be individually adjusted to the required sensitivity, or can be disabled if required to ensure vital equipment continues to operate even in the most challenging situations.

Trips and warnings are written to an eight-place trip log, together with information on motor and system status at the time, speeding up analysis of problems.

Installed Worldwide

MVS soft starters have been installed in high-profile locations worldwide. By integrating motor protection with soft start and soft stop control, the MVS provides a simple and cost-effective solution for most major applications.

Safe & Easy Operation

The MVS soft starter includes numerous user-friendly features to ensure safe and easy operation, and has the flexibility to meet the demands of all medium voltage situations.

Enclosure Options

MVS soft starters are available in IP54 enclosures, with options for line and bypass contactors, earthing and isolation switches. AuCom can also design and build enclosures to meet particular specifications, and we offer full applications engineering support at all stages of the design process. For customers who prefer to build their own enclosures, MVS soft starters can be supplied in IP00 format or as a kit for local assembly.