Product Description:

The 131B4264 is an AC variable frequency drive produced by Danfoss for the VLT FC 102 HVAC Drives series. Within HVAC plants, it regulates fan or pump speed so building controllers can match airflow or water circulation to real-time demand. The drive supports variable-speed operation in ventilation, cooling, and water-distribution systems where motor output must respond to changing building loads. This control can reduce unnecessary motor operation during periods of lower demand while maintaining the required flow or pressure.

Electrical performance centers on a continuous output current of 61 A and a short-term current rating of 67.1 A, allowing the drive to start high-inertia blowers and handle temporary load increases. It accepts a supply of 380 to 480 VAC. The motor output is rated at 30 kW, which corresponds to a mechanical shaft capability of 40 HP. The IP21/Type 1 backplate protects live parts from falling solid objects, while the B2 frame has a depth of 261 mm, a width of 243 mm, and a height of 664 mm. A graphical local control panel is included for parameter entry and operating-status review. Mounting uses the Frame B and C backplate, which leaves the heat sink exposed to open air at the rear for heat removal.

Total apparent power reaches 42.3 kVA on a three-phase power supply. During normal operation, the drive dissipates 698 W of heat, which must be removed by airflow through the enclosure. The unit has a mass of 29.95 kg, an important consideration when selecting mounting surfaces and lifting equipment. An integrated RFI filter reduces conducted electrical emissions that could otherwise affect nearby equipment. The drive does not include a brake chopper, so applications requiring dynamic braking must use an appropriate external arrangement. Standard cable entries are prepunched to simplify power and control wiring. The printed circuit boards are uncoated, so the installation environment should protect the electronics from excessive moisture and airborne contaminants.