Product Description:

The 178B0535 is a frequency converter produced by Danfoss within the VLT 5000 Frequency Converters series. As an AC drive, it adjusts the output frequency and voltage delivered to induction motors so plant designers can match shaft speed to process demand, reduce energy use, and limit mechanical stress during starts and stops. The converter forms part of the control layer in automated conveyors, mixers, and pump stations where electronic speed regulation replaces throttling or mechanical gear changes. Its variable-speed operation also allows connected equipment to respond to changing production requirements without repeatedly starting and stopping the motor.

The drive connects directly to a 380–500 V three-phase mains supply, eliminating the need for step-up transformers in typical industrial switchboards. In applications that tolerate a brief 10% overload, the inverter delivers a continuous mechanical output of 18.5 kW. For heavy-duty cycles requiring a 60% overload, the output rating is 15 kW. These limits allow appropriate motor selection for the expected load and operating cycle. The electronics are housed in a compact IP20 enclosure, which provides finger-safe protection when the unit is mounted inside a ventilated cabinet. Command and feedback loops are handled by a process control card that accepts analog references and digital I/O, allowing proportional speed control or closed-loop PID control without external PLC programming.

The integrated option provides four additional relays rated for 250 VAC, giving plant wiring systems extra form-C contacts for alarms or fan interlocks. The unit uses non-coated circuit boards, which are suitable for installation in clean electrical rooms with controlled conditions. A local HMI is available through a supplied display, enabling direct parameter entry and fault readout from the converter. The drive has no fieldbus option, so it relies on hardwired signals or the built-in regulator for control. This arrangement supports installations that use analog references, digital inputs, and relay outputs rather than network-based commands. RFI filter performance is not assigned in the provided configuration, allowing an external filter to be selected when electromagnetic compliance requirements call for additional suppression.