FIELD: electric engineering. SUBSTANCE: device has armature drive 1, power supply lines 2 which run through additional removable distribution unit 3. Power supply lines 2 in removable unit 3 are connected to measuring and analyzing unit A. Removable unit 3 is simultaneously used for normal operations and testing of drive 1. In order to achieve this, voltage measuring lines 5 which are connected to voltage taps 6 are provided in power supply lines 2 of unit 3. In addition power supply lines 2 are connected to current converters 8, which are connected through current measurement lines 9 to current terminals 10 which may be connected through testing plug 12 to measuring and analyzing unit A. Each removable unit 3 may have encoding terminal 13. EFFECT: increased functional capabilities. 8 cl, 2 dwg
