Electrical device for supplying electrical power to electrical power units

An electrical device for supplying electrical power to multiple power units includes a first module, including an electrical circuit breaker; a second, removable module, including a control circuit, programmed to trip the circuit breaker depending on values of the electric current that is flowing through power lines; a connection interface provided with output connectors that are connected to the power lines; removable elements, each containing an item of electrical equipment that is intended to be connected to an electrical power unit and to one of the power lines by the output connectors, the control circuit being connected to an interface for controlling each removable element via a data link by virtue of the connection interface.