Product Description:

The 178B1390 is an AC variable-frequency drive manufactured by Danfoss for the VLT 2800 Low Voltage Drives series. This compact controller converts fixed-frequency mains power into a regulated three-phase output, allowing small induction motors in conveyors, pumps, and agitators to operate at speeds that match process demands. Installed inside an electrical panel, it provides adjustable motor control that can reduce energy use and mechanical stress in light industrial automation systems. Its compact design also makes it suitable for applications where available cabinet space is limited.

Its power stage is rated at 0.55 kW, which represents the continuous electrical power the inverter can supply to a connected motor, while the mechanical equivalent is 0.75 HP for equipment sized with imperial units. The drive accepts an input supply of 200–240 V AC from a single-phase feed, allowing direct connection to common low-voltage utility circuits without a step-down transformer. Internal rectification converts the incoming AC power to DC before pulse-width modulation produces the variable-frequency output required by a compatible squirrel-cage induction motor. The drive has an IP20 enclosure rating, so it should be installed inside a suitable cabinet that limits access to live parts and protects the electronics from contaminants. Adequate cabinet clearance should be maintained so air can circulate around the housing and remove heat generated during operation.

The integrated built-in display (SLCP) provides access to operating parameters and real-time status information without requiring a separate control panel. Its interface supports local adjustment of motor settings, acceleration ramps, and process-related values during setup and operation. A slim book-style housing reduces the required panel width, allowing multiple drives to share an enclosure while preserving space for wiring and airflow. The unit has no application option, so its standard control functions can be configured for the required process through the available parameters. The electronics are supplied without a protective coating, making the drive most appropriate for clean, dry indoor environments where moisture, conductive dust, and chemical vapors are controlled. Proper enclosure selection helps maintain suitable operating conditions for the uncoated internal components.