FC-103

The Danfoss FC-103 drive from the VLT FC 103 Refrigeration Drives series is engineered to deliver reliable variable speed control and intelligent capacity modulation for industrial refrigeration systems. This drive accommodates a wide power range of 1.1-315 kW and supports mains supply voltages of 200-240V, 380-480V, and 525-600V ±10% at supply frequencies of 50/60 Hz, making it adaptable to virtually any global installation. Its compact housing features protection classes IP20/21/55/66, ensuring robust defense against dust ingress and moisture in demanding environments. Integrated EMC filters and RFI filters minimize electromagnetic interference and harmonic distortion, eliminating the need for external filtering solutions. The drive’s user-configurable ramp times from 1 to 3600 seconds enable smooth acceleration and deceleration profiles, reducing mechanical stress on compressors and piping.

Technical specifications of the FC-103 refrigeration drive underscore its versatility and industrial-grade performance. It provides 2 analogue inputs configurable for voltage or current modes and features 6 programmable digital inputs (2 of which may function as digital outputs), along with 2 programmable relay outputs rated at 240 VAC/2 A and 400 VAC/2 A. The drive employs Class 3C2 or 3C3 coated electronics for enhanced corrosion resistance in harsh ambient conditions. A displacement power factor (cos φ) near unity (> 0.98) and integrated DC link harmonic filters ensure a low harmonic load on the mains supply. The output frequency range of 0-590 Hz and output voltage adjustable from 0 to 100% of supply voltage afford precise control of compressor speeds and energy consumption.

Operationally, the FC-103 drive maintains performance in ambient temperatures up to 50°C (with D-frame variants rated at 45°C), ensuring continuous operation without the need for external cooling. Its variable speed control capability facilitates intelligent capacity control, optimizing energy usage across varying refrigeration loads. The maintenance-free design operates reliably over extended service intervals, and routine cleaning of the exterior housing is the only recommended upkeep to prevent dust accumulation. The integrated EMC filters and RFI filters deliver stable operation by suppressing electromagnetic noise, preserving network integrity in complex industrial automation setups.

Designed for seamless integration, the Danfoss FC-103 drive communicates with standard industrial control systems via its programmable I/O and harmonizes effortlessly with refrigeration system panels and HVAC controllers. Its wide voltage and frequency compatibility make it ideal for retrofit projects and new installations in commercial refrigeration, food processing, cold storage warehouses, and district cooling applications. With critical specifications such as Power Range, Protection Classes, and Ramp Times prominently featured, the FC-103 drive offers reliable, energy-efficient performance tailored to the needs of modern refrigeration and industrial automation environments.