Product Description:

The 175G5230 is a three-phase soft starter manufactured by Danfoss for the MCD Soft Starters series. It belongs to the VLT Soft Starter MCD product group. The unit is installed between the line supply and an induction motor to moderate voltage rise and limit mechanical shock during startup, which helps reduce stress on the drive train and line disturbances in automated production cells. By controlling motor voltage during acceleration, it can also reduce belt slip, hydraulic shock, and abrupt torque transfer at startup. This type of device is used where a full-voltage start would place unnecessary stress on connected equipment.

This model handles a line input of 200-440 VAC and is sized for motors up to 110 kW. A continuous line rating of 200 A is the maximum steady-state current the device can carry without derating, while the starter’s silicon-controlled rectifiers limit motor energization to protect the supply network. The control circuit draws only 2 A, reducing the load on auxiliary power supplies. It operates on a low-voltage control supply of 24 VAC/VDC. The power section allows motor current to rise in a controlled manner instead of applying full inrush current at once. These electrical values support three-phase ramp profiles matched to motor inertia and load torque.

The protection curve trips at 105% of the programmed full-load current, so sustained overloads are cleared before rotor heating exceeds insulation limits. Control electronics remain stable because the supply can vary by ±20% without malfunction. The enclosure is 240 mm high, with a width of 202 mm and a depth of 214 mm. It occupies 0.258 L of panel space and weighs 6.8 kg, which helps keep cabinet load manageable. The compact housing also leaves room for cable bending radii and the airflow needed for forced ventilation inside the panel.