A nacelle (1a, Ib) of a turbojet engine (3a, 3b) comprises a rear section equipped with at least one thrust-reversal system having, on the one hand, means of deflecting at least part of the turbojet engine air flow and, on the other hand, at least one moving cowl (4a, 5b, 5a, 5b) able, under the action of at least one electromechanical actuating means (6a, 6b, 7a, 7b), to move from a closed position into an open position in which it opens up a passage in the nacelle and in which the deflection means are active. The system comprises, on the one hand, at least one power control unit (8a, 8b) able to convert a high-voltage electrical supply into at least one electrical supply intended for the electromechanical actuating means, and at least one control input for controlling said power control unit and, on the other hand, at least one control unit driver (9), distinct and separate from this control unit, and comprising at least one control input and at least one drive output intended to be connected to the drive input of the control unit.