Product Description:

The 136G7352 is a motor soft starter produced by Danfoss as part of the MCD Soft Starters series. Acting as an electronic stage between a three-phase mains supply and an AC induction motor, the unit controls the initial voltage gradient so belts, pumps, and fans accelerate smoothly, minimizing torque shock and extending mechanical service life in automated installations. Its integrated bypass contactor transfers running current away from the power semiconductors once full speed is reached, reducing heat and overall energy dissipation during steady-state operation.

The starter accepts line supplies from 200-525 V AC across three phases and is dimensioned for a continuous motor draw of 244 A. An internal bypass architecture, implemented through an internal bypass contactor, eliminates thyristor losses after ramp-up, which helps panels stay cooler. The logic circuitry is energized by a control input of 110-120/220-240 V AC, permitting installation on either standard plant voltage level without auxiliary transformers, and it draws 600 mA from that source. This control supply range allows the unit to fit panels that use either of the common AC control voltages. Transient overvoltages encountered on industrial feeders are tolerated up to 6 kV of impulse withstand, while the insulation system is rated at 690 V AC to separate power components from grounded metalwork.

For panel builders, physical protection is classified as IP00, so the device must be mounted inside an enclosure that provides the required touch-safe barriers. Its analog output can drive monitoring equipment up to 600 Ω, allowing proportional current or torque feedback to remote PLC inputs. Fault relays are sized for 10 A @ 250 V AC, and the power stage survives prospective faults up to 18 kA @ 600 V AC when backed by suitable upstream fuses, ensuring coordination with common MCCB ratings. The starter can also provide both analog status signaling and relay-based fault indication to external control hardware.