The protection of a plurality of sources of dc voltage, the central portion of the production of an a.c. voltage having a plurality of sources of dc voltage, a voltage inverter, and such a system of protection, and method of protection associated

摘要

This protection system (30) is intended to protect a plurality of sources of dc voltage (20) adapted to be connected in parallel between a first (16) and a second (18) input terminals a voltage inverter (12), the voltage inverter (12) being able to convert a d.c. input voltage into an alternating voltage of the output, each of the dc voltage source (20) is connected by a first electrical conductor (22) to the first input terminal (16) and by a second electrical conductor (26) to the second input terminal (18). The protection system (30) comprises, for each continuous voltage source (20), a first shut-off member (36) and a first detector (48) of an insulation defect of the first conductor (22) with respect to an electrical ground (32), the first detector (48) and the first shut-off member (36) associated therewith being connected in series between the dc voltage source (20) and the first input terminal (16) of the inverter. The protection system (30) comprises means (48), in the event of detection of the insulation defect, the first shut-off member (36) is associated, in order to open the corresponding electrical connection to said first conductor (22).