Product Description:

The 131B4267 is a variable frequency drive manufactured by Danfoss for the VLT FC 102 HVAC Drives series. Supplied under the VLT HVAC Drive product group, it regulates the speed of induction motors that move air or water through commercial and industrial heating, ventilation, and air-conditioning systems. By converting fixed-frequency line power into a controllable output, the unit helps building automation systems match motor torque to real-time demand and reduce energy consumption.

The drive provides a rated mechanical output of 30 HP, corresponding to an electrical power rating of 22 kW. The input section accepts 380–480 VAC from three-phase power lines, allowing direct connection to common low-voltage distribution panels. Its IP55 / Type 12 enclosure protects against dust and dripping water, allowing wall or cabinet mounting in mechanical rooms without an additional housing. The drive has no brake chopper, so regenerative energy must be handled outside the unit when rapid deceleration is required. This arrangement is suitable for HVAC loads that normally slow through controlled ramping or coast-to-stop operation.

Local interaction is handled by a graphical local control panel that presents parameters, fault codes, and trend data on a backlit screen. Electromagnetic compatibility is supported by the integrated RFI Class A1/B (C1) filter, which helps limit conducted radio-frequency interference. The cabinet interface uses standard cable entries that accommodate common cable glands or conduit fittings. The drive uses uncoated printed circuit boards, so it should remain within the rated humidity limits and be protected from condensation or corrosive airborne contaminants. Option slots A, B, C0, C1, and D are not populated, and Adaptation B is not included in this configuration. The identification suffix “Series Identifier 102” distinguishes this unit from other VLT platforms without changing its stated electrical operation.