Softstarters, motorstarters and solid state contactors for three-phase motor control

The three-phase asynchronous motor is the most common drive in machines and plants, and starting, reversing and braking it are core jobs for electronic switching devices. DOLD's power electronics range addresses these tasks with softstarters and softstop units, smart motorstarters, braking devices, reversing contactors and solid-state relays and contactors, along with speed and phase controllers.

Where an application calls for high switching frequencies or many switching cycles, solid-state devices are a proven choice: they switch without wear or noise, tolerate repeated loads and high temperatures, and last longer as a result. A broad electronic portfolio also reduces wiring work, panel space and maintenance costs. For Industry 4.0 projects, devices with an integrated Modbus interface connect directly to plant control systems for configuration and flexible process control. Send us the part number or your motor application and we will help you narrow it down.

• Softstarters for gentle motor starting and simple drive monitoring
• Wear- and maintenance-free motor brakes for fast stopping of hazardous parts
• Hybrid motorstarters combine motor control with drive monitoring
• Solid state relays without heat sink, contactors with heat sink
• Reversing contactors change rotation direction and can monitor load
• Phase controllers adjust voltage by phase cutting