178B8587 by Danfoss

Danfoss positions the 178B8587 within its VLT 2800 Low Voltage Drives series as a compact AC motor controller for process-oriented automation. The unit functions as a variable frequency drive that modulates motor speed to match load demand, reducing energy use and mechanical stress in conveyors, pumps, and fans on three-phase grids. By varying output frequency and voltage, it helps stabilize process flow while reducing abrupt starts and unnecessary mechanical loading on connected equipment. Because its application focus is process control, the parameter blocks emphasize ramp profiles and constant-torque regulation rather than HVAC-specific settings.

The drive supplies a mechanical output of 20 HP, which corresponds to an electrical rating of 15.0 kW. It accepts a mains window of 380–480 V at 50/60 Hz on a three-phase line, allowing installation on standard industrial power networks. A built-in brake transistor supports controlled deceleration during braking events. Ingress protection is limited to IP20, so cabinet mounting is required where airborne debris or moisture is present. The unit does not include an application option, a fieldbus card, or an RFI filter, so EMC control and network integration must be handled externally. All control feedback and parameter changes are handled through the local interface, and coated electronics improve reliability in environments with airborne chemicals or humidity.

The physical format is the slim Bookstyle housing, which minimizes panel depth and eases side-by-side mounting for multi-motor zones. Operators interact through the built-in display (SLCP), which presents speed setpoints, status codes, and quick-menu access without external panels. Local access allows routine status review and basic adjustments without additional peripherals. Protective varnish provides a coated finish that helps shield PCB traces against condensation during duty breaks.