| 摘要 |
The invention relates to a sun protection, closure or blackout apparatus (INST) comprising at least one actuator (ACT) powered by a main power source (ALIM) and a mobile element (COV) that can be moved by the actuator between two end-of-travel positions, i.e. high (LS1) and low (LS2). In addition, the invention comprises a back-up power supply unit (SC) provided with means (C2) for establishing a reversible electrical connection to the actuator (ACT), said means being designed to supply the actuator with electrical power for the operation thereof when the main power supply source is not available. The back-up power supply unit (SC) comprises a first electrical power storage unit (ST1), of which the maximum stored power is sufficient for multiple partial movements of the mobile element (COV) and the maximum delivered electrical power (Pmax) is sufficient only for one partial movement of the mobile element (COV) by the actuator between the end-of-travel positions. |
