Electrical power supply disconnector for a protection module and protection module including such a disconnector

An electrical power supply disconnector for establishing or severing the connection between current conductors and a power supply circuit. The electrical power supply disconnector includes a housing including a central passage, the walls of which bear contact strips that are located facing one another along a contact axis, and a slider sliding through the central passage in the direction of a centre axis, and bearing at least a first electrically conductive bar, oriented along the contact axis, for electrically connecting at least one first low contact strip and one high contact strip when the slider is in a first position. A protection module including such a power supply disconnector.