Airbus Operations (s.a.s.)

Airbus France

Grigori Marguin

Pierre Henri Henrard

Pierre Saint-Chamant

Jean-Louis Lando

Frédéric Fourie

The invention relates to a method for protecting a multi-phase autotransformer for an aircraft, including the steps of receiving () values of current output from (I, I) the first and second phases and a value of current input into (I) the second phase; determining (), from these received values of the second phase, a value of current representative of the operation (I) of the second phase; determining (), as a function of this determined value and of the value of current output from (I) the first phase, a value representative of the homopolar current (I) flowing in the first phase; comparing () this value of homopolar current (I) with a first predetermined threshold value (S1) at least during a first predetermined period (D1); and controlling () the values of currents input into (I, I) and/or output from (I, I) the phases as a function of the said first comparison.

Method and device for protecting an autotransformer for an aircraft

The present disclosure is directed towards a method for protecting a multi-phase autotransformer for an aircraft including the steps of receiving values of current input into and output from the first and second phases; determining, as a function of these received values, values of current representative of the operation of the phases; determining, as a function of these determined values, a value representative of a homopolar current flowing in the first phase; comparing, in a first comparison, the value representative of the homopolar current flowing in the first phase with a first predetermined threshold value; and controlling the values of current input into the phases as a function of the first comparison.

The invention relates to a system and a process for direct current power supply of electrical networks. This system comprises a system for direct current power supply of electrical networks comprising at least two generators (GG), an alternating current power distribution bar (), a direct current power distribution bar (), wherein these two power distribution bars () are connected to one another by a rectifier unit () and a battery (). The alternating current bar () is connected to the generators (G, G) via a transfer contactor (). The direct current power distribution bar () is connected to the battery () via a first contactor (S) in series with a second contactor (S) positioned in parallel with a power diode ().

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Toulouse, France

Grigori Marguin