The Allen-Bradley 1336R-VB048CNV-AA drive is a line regenerative AC drive that is employed for returning power to the 3-phase electrical grid in those applications where induction motors tend to behave as alternators because of constant breaking and motor overhauling. Non-regenerative variable frequency drives (VFDs) are not practical for those kinds of applications because they tend to accumulate the excess energy as a voltage in the capacitors of their DC Bus, but when the storage capacity is overflown, the AC drive will stop and register a bus overvoltage fault. Line regeneration devices like the Allen-Bradley 1336R-VB048CNV-AA drive are the solution for this type of problem because they provide an alternative path to drain the excess voltage that is generated by overhauling motors in a useful way, unlike the traditional approach of using a braking resistor to dissipate this extra energy as heat.

Some of the advantages of using the Allen-Bradley 1336R-VB048CNV-AA line regeneration package in applications include high efficiency in the utilization of energy because a considerable portion of the power would be recycled and not dissipated as heat, simplified installation because no external braking systems such as mechanical devices or resistor technologies need to be installed, energy conservation because of the power factor reduction that is implied when giving back generated power to the electrical 3-phase AC utility line, and low harmonic content since the system itself provides a path for extra energy to be reutilized. With the Allen-Bradley 1336R-VB048CNV-AA line regenerative AC drives, applications with cyclic or continuous braking will contribute to optimizing the energy consumption of the facility.