Electrical installation with means for switching series electric arcs

An electrical installation for an aircraft, comprising:

• an electrical source;
• an electrical load;
• first and second supply lines, connecting the electrical load to the electrical source with a view to supplying electrical power to the electrical load;
• and
• a power contactor located on the first supply line;
• wherein the electrical installation further comprises:
• a branch parallel to the first supply line connected between two points (A, B) of the first supply line these two points (A, B) surrounding the power contactor;
• on this branch, an auxiliary contact connected to the power contactor to open before and close after the power contactor;
• and
• a device for opening one of the supply lines in response to an occurrence of a current flowing in the parallel branch resulting from an occurrence of series electric arc between the two points (A, B) of the first supply line.