Reinhausen AcF series active harmonic filters

AcF series active filters from Maschinenfabrik Reinhausen (MR) are suitable for three-phase, 3-wire and three-phase, 4-wire systems and are available both in 415 and 690 V versions.

The AcF series active filter uses a special T-sine reconstruction filter between the network and the IGBTs in each module in order to provide a significantly lower switching frequency, thereby minimising losses and maximising the lifetime of IGBTs. They are available in current ranges from 100 to 600 A and up to 4800 A in parallel.

They have a low power loss of 1900 W per 100 A module, and offer both global and selective harmonic compensation to the 50th harmonic and a response time of 1 ms compared to, typically, 20 ms for other active filters.

The AcF series active filter has a unitised and modular construction, and an embedded web server means that no special software is necessary.

Both open-loop and closed-loop configuration is possible. The closed-loop configuration is used to comply with the THID injected into the grid. The open-loop control is used to provide compensation for an individual or a group of nonlinear loads inside the plant facility.

The active filters can also be used for MV compensation via an interposing transformer. In this capacity the filters are employed in three-phase, 3-wire sub-distribution networks.