The standard version of the AXA 2200 GPU is designed for a mains voltage of 3 x 400 VAC ± 15%, 50/60 Hz. This option makes it possible to adapt GPUs of the compact series (GPUs with ratings from 30 to 90 kVA) to a mains voltage of 3 x 460 VAC ± 15%, 50/60 Hz only by reduction of the (control) voltage of the AUX module. This is possible because the power part of the compact series is designed for reliable operation by voltages up to 530 VAC.

GPUs equipped with this option show the correct mains voltage in the display. Other GPUs of the AXA 2200 series require an autotransformer at input to show the right voltage.

The autotransformer is mounted in an add-on module (AXA standard option 573942).