Apparatus and method for an under-voltage protection of an electrical network, especially in an aircraft comprising a fuel cell

摘要

Apparatus (4) for protecting an electrical network (6) of an aircraft, comprising a power switch (22), an activation means (20) coupled with the power switch (22), a detection circuit (10, 12) connectable to the electrical network (6) for detecting a voltage, wherein the detection circuit (10, 12) is coupled with the activation means (20) and wherein the activation means (20) is adapted for opening the power switch (22) once the detected voltage is lower than a predetermined voltage. This is particularly advantageous for high voltage direct current networks temporarily, primarily or permanently powered by a fuel cell system.