178B5026 by Danfoss

The 178B5026 is an AC variable frequency drive produced by Danfoss for the VLT 2800 Low Voltage Drives series. The module converts constant three-phase supply power into a variable output frequency so standard induction motors can start smoothly, modulate speed, and reduce energy consumption across automated equipment. Designed for installation inside a control cabinet, it combines motor control, keypad supervision, and basic protective functions in a narrow housing suited to space-constrained machines. This type of drive is commonly used where adjustable motor speed helps support steady process control during normal operation.

Electrical ratings center on a continuous output of 1.1 kW, which corresponds to a mechanical capacity of 1.5 HP at the motor shaft. The drive accepts incoming line potentials of 380-480 V ±10% at 50/60 Hz, allowing standard industrial networks to connect without transformers. It is engineered for three-phase supplies, so input current is shared across the phases when the unit is correctly sized. Inside the cabinet, the electronics are guarded by an IP20 touch-safe enclosure, which means live parts remain finger-protected and the module still requires installation in a clean control cabinet. These ratings help match the drive to suitable motors, cable sizes, and cabinet airflow.

The mechanical layout follows a book-style format, giving a tall, narrow profile that can be stacked side by side in a control cabinet. Parameter access is provided by a built-in display, labeled SLCP, so speed reference, alarms, and status codes can be viewed locally without external tools. All circuit boards use a coating finish to improve resistance to condensed moisture or airborne contaminants often found in process applications. The hardware configuration is standard, with no dedicated application card, fieldbus option, or RFI filter installed. In this form, the drive is intended for hard-wired I/O or for use with external EMC components when required by the installation.