178F0665 by Danfoss

The 178F0665 is a low-voltage AC drive produced by Danfoss and placed in the VLT 2800 Low Voltage Drives series. It is intended to regulate the speed of induction motors in continuous-flow or batch process lines, allowing torque and flow to match production demand by modulating output frequency. This operating method supports smoother motor control during routine starts, speed changes, and steady-state running in pump, fan, and conveyor duties.

It delivers 1.5 kW of electrical output power, which suits small to mid-range machinery. The input section accepts 380-480 V ±10% 50/60 Hz, so the same model can operate on common international three-phase supplies without hardware changes. Internal power devices switch a three-phase bridge that maintains motor flux while limiting peak current ripple. An IP20 housing provides basic touch protection when the unit is mounted in a panel. Compliance with EN 55011 Class A1 is supported by the built-in RFI filter, which helps reduce conducted noise on supply cables. Parameter entry and local diagnostics are handled through the built-in display (SLCP), which shows key values and stores alarm history. This arrangement allows routine adjustments and fault review at the drive without extra interface hardware.

The 2.0 HP rating gives a direct reference for systems documented in imperial units. A book-style enclosure minimizes cabinet width, allowing multiple converters to be stacked with minimal clearance. The factory-applied coating finish helps shield internal PCBs from moisture and airborne chemicals common in process environments. The hardware is supplied in a standard configuration without an application option or a fieldbus board, which keeps the unit focused on standalone PID or analog control loops. That layout fits installations where direct local setup is preferred over networked control.