Abstract: A battery cut-off circuit for a vehicle includes a delay circuit which, upon initiation of battery cut-off and opening of the main battery contacts, inhibits re-closing of those contacts for a time sufficient to allow the vehicle alternator circuit contacts to act, thereby avoiding arcing of those contacts.

Abstract: Electronically controlled battery electromagnetic cut-out breaking the main ircuit and the auxiliary circuit and being intrinsically safe, characterized in that it includes a driving electromagnet (4) with a plunger core (10) of which the drive shaft (12,14) carries, by means of an insulating intermediate part (16), a central connecting part (17) intended for the breaking of the auxiliary circuit (A,D+), as well as a cross piece (18), driven by means of a spring (19) and itself carrying by means of insulating intermediate parts (22,23) two lateral connecting bars (21), returned by return springs (26), and capable of together being applied, in the energized state of the electromagnet (4), against four terminal locations (27 or 27a) in order to ensure the main single or two-pole break, the whole assembly being enclosed with the electronics (35) in a sealed case (1,33,36).