Abstract: A motor management device controls the supply of electrical power to a motor by controlling at least one switching member. To be more easily adaptable, the device includes a platform and a modular connector which is separate from the platform. The platform bears an electronic unit including a power supply module controlling the switching member, a monitoring module intended to detect a fault of the motor, a protection module that disconnects the power supply in the event of a fault and a control module that controls the power supply module. The modular connector includes interchangeable connection elements, and includes at least as many connection elements of control output type as the device controls switching members, each connection element connecting a switching member to the power supply module, as well as a connection element of state output type connected to the monitoring module and providing an item of fault information when the monitoring module detects a fault of the electric motor.

Abstract: A method for estimating a property of an electrical switching device that includes an electromagnetic actuator that includes a coil. The method includes: measuring electric current flowing through the coil; measuring supply electrical voltage of a control circuit for the actuator; injecting an electric current pulse into the coil; identifying a first time corresponding to a time for which the current flowing through the coil reaches a predetermined threshold value when the current increases following the injection of the pulse; and identifying a second time corresponding to a time for which the current flowing through the coil again reaches the predetermined threshold value when the current decreases after a spike. The method further includes estimating a resistance of the coil on the basis of a ratio of a sum of the values of the voltage that are measured between the second time and the first time, to a sum of the values of the current that are measured between the second time and the first time.

Abstract: An electrical device includes a fixed support with supply lines and a distribution circuit to supply power to a contactor block. Each contactor block includes secondary lines, each connected to a supply line, and is movable between joined and disjoined positions. Each contactor block includes a switching device for switching all secondary lines of the contactor block between open and closed. The electrical device also includes a control block, movable between joined and disjoined positions. When in the joined position, each contactor block also is held in the joined position, an electronic monitoring device of the control block also being connected to the switching device of each contactor block to control switching of each switching device independently. When the control block is in the disjoined position, the switching device of each contactor block opens the secondary lines, while each contactor block is movable between its joined and disjoined positions.

Abstract: A method for estimating a property of an electrical switching device includes: measuring the electric current flowing through the coil; measuring the supply electrical voltage of a control circuit for the actuator; injecting an electric current pulse into the coil; identifying a first time corresponding to the time for which the current flowing through the coil reaches a predetermined threshold value when the current increases following the injection of the pulse; identifying a second time corresponding to the time for which the current flowing through the coil again reaches the predetermined threshold value when the current decreases after the spike; and estimating the resistance of the coil on the basis of the ratio of the sum of the values of the voltage that are measured between the second time and the first time, to the sum of the values of the current that are measured between the second time and the first time.

Abstract: An electrical device for supplying power to a plurality of power units comprises a fixed support and a plurality of contactor blocks. The fixed support comprises input terminals, for receiving a polyphase power current, and a distribution circuit that is configured to distribute the power current to power lines that each comprise a plurality of single-phase supply lines, the fixed support comprising a number of power lines that is the same as the number of contactor blocks of the electrical device, and each power line comprising a number of supply lines that is the same as the number of phases of the power current, each of the supply lines of a contactor block being connected to a respective phase of the power current, the supply lines being accessible on the outside of the fixed support via intermediate terminals.