Product Description:

The 132H2229 is a three-phase soft starter manufactured by Danfoss as part of the MCD Soft Starters series. Installed between the line supply and an induction motor, it uses controlled SCR firing to limit inrush current and shaft torque during startup, reducing mechanical shock and line disturbances. In automated process lines, it replaces across-the-line contactors where smoother acceleration and deceleration profiles are required to protect pumps, conveyors, and fans.

Rated for 448 A of steady-state motor current, the unit handles medium-to-large drives without exceeding its silicon stack limits. Because it has no internal bypass, an external contactor must short the thyristors after ramp-up to reduce conduction losses during normal running. Its frame size 2 outline standardizes drilling patterns and terminal spacing across the product family. An IP00 ingress rating indicates open-chassis construction, so the starter must be installed inside a protected cabinet. The unit is built for three-phase power systems and is part of the VLT Soft Starter MCD group. Overall enclosure volume is 59.4 L, which helps with cabinet space planning and airflow layout. At full load, the thyristors generate heat that must be removed by cabinet ventilation, and the absence of an onboard fan simplifies the cooling arrangement.

The starter is typically paired with current-rated fuses and an external bypass contactor that match the motor circuit and duty cycle. The standardized frame supports consistent panel layouts, and the exposed chassis works with forced-air cabinet cooling when additional heat removal and electrical protection are needed. In high-cycle applications, the soft starter function limits peak torque, which can reduce stress on couplings and help upstream switchgear stay within permissible fault limits.