FIELD: electrical engineering.
SUBSTANCE: power supply control device includes a DC power supply, which includes a positive electrode and a negative electrode, load electrically connected to a DC power supply, a relay in series connected to the current line from the positive electrode to the negative electrode through the load, switching device in series connected to current line, and controller, control relay and switching device. Controller, in case current line must be electrically open, switches switching device into disconnected state and then switches relay to disconnected state.
EFFECT: suppressing wear of relay contacts.
15 cl, 12 dwg
