The Active Interface Module essentially comprises a liquid-cooled filter reactor and a liquid-cooled filter module. The filter module contains a Clean Power Filter with basic RI suppression, the pre-charging circuit for the Active Line Module, the line voltage sensing circuit and monitoring sensors.

A bypass contactor is provided separately. Active Interface Modules are used in conjunction with Active Line Modules.

Liquid-cooled Active Interface Modules cannot be supplied for all liquid-cooled Active Line Modules. Where they are not available, air-cooled Active Interface Modules can be ordered instead.