Abstract: A method for identifying a malfunctioning current sensor in an electrical apparatus, in which an electrical power supply of the electrical apparatus is at least partly supplied by a switched-mode electrical power supply circuit connected to at least one current sensor which samples an electrical current in a phase conductor of an electrical installation, the power supply circuit delivering a regulated electrical voltage, the method including: determining a switching duty cycle of a power switch of the switched-mode electrical power supply; analysing the determined switching duty cycle; and identifying a failure condition if the behaviour of the switching duty cycle is representative of a malfunctioning of at least one of the current sensors.

Abstract: A method for identifying a malfunctioning current sensor in an electrical apparatus, in which an electrical power supply of the electrical apparatus is at least partly supplied by a switched-mode electrical power supply circuit connected to at least one current sensor which samples an electrical current in a phase conductor of an electrical installation, the power supply circuit delivering a regulated electrical voltage, the method including: determining a switching duty cycle of a power switch of the switched-mode electrical power supply; analysing the determined switching duty cycle; and identifying a failure condition if the behaviour of the switching duty cycle is representative of a malfunctioning of at least one of the current sensors.

Abstract: A method that tests a differential protection device having a first and a second differential protection chain includes: a step of controlling the flow of a test signal for a duration smaller than a no-trip time, and steps of determining the state of the two differential protection chains after the flow of a test signal, of monitoring the conformity of the evolution of the protection chains, and of determining the state of the test. The differential protection device includes two differential protection chains and controls the flow of a test current for a duration smaller than a no-trip time. It includes modules for monitoring the evolution of the protection chains and determining the state of the test in order to control the opening of an electrical unit if the test is good. The device can be included in the electrical unit.

Abstract: An electrical protection apparatus includes at least one first or main electrical protection function able to be carried out by a microcontroller and a button termed a test button intended to be actuated by a user to give rise to the implementation of the testing of at least one second electrical function, this implementation of the test being intended to give rise to the tripping of the protection apparatus D. The electrical protection apparatus includes a device for pooling the actuation of this test button with at least one action intended to carry out a third function, as a function of various types of action exerted on the test button, these actions being detected by the microcontroller, the aim being for the latter to give the order to carry out one of the third functions or else the testing of one of the second functions.

Abstract: A device for monitoring the activity of at least one first and one second processing unit fitted to an electric trip unit, each processing unit including a first activity-indicating circuit sending an activity signal to another processing unit and a monitoring circuit comparing a received activity signal with a reference signal. Each processing unit activates a first tripping circuit and/or an auxiliary output when the received activity signal is different from the reference signal. A circuit-breaker including such a monitoring device and a method for monitoring the operation of an electric trip unit including at least two processing units.

Abstract: A method that tests a differential protection device having a first and a second differential protection chain includes: a step of controlling the flow of a test signal for a duration smaller than a no-trip time, and steps of determining the state of the two differential protection chains after the flow of a test signal, of monitoring the conformity of the evolution of the protection chains, and of determining the state of the test. The differential protection device includes two differential protection chains and controls the flow of a test current for a duration smaller than a no-trip time. It includes modules for monitoring the evolution of the protection chains and determining the state of the test in order to control the opening of an electrical unit if the test is good. The device can be included in the electrical unit.

Abstract: An electrical protection apparatus includes at least one first or main electrical protection function able to be carried out by a microcontroller and a button termed a test button intended to be actuated by a user to give rise to the implementation of the testing of at least one second electrical function, this implementation of the test being intended to give rise to the tripping of the protection apparatus D. The electrical protection apparatus includes a device for pooling the actuation of this test button with at least one action intended to carry out a third function, as a function of various types of action exerted on the test button, these actions being detected by the microcontroller, the aim being for the latter to give the order to carry out one of the third functions or else the testing of one of the second functions.

Abstract: A device for monitoring the activity of at least one first and one second processing unit fitted to an electric trip unit, each processing unit including a first activity-indicating circuit sending an activity signal to another processing unit and a monitoring circuit comparing a received activity signal with a reference signal. Each processing unit activates a first tripping circuit and/or an auxiliary output when the received activity signal is different from the reference signal. A circuit-breaker including such a monitoring device and a method for monitoring the operation of an electric trip unit including at least two processing units.

Abstract: The general field of the invention is that of methods for using a human-machine interface device for an aircraft comprising at least one speech recognition unit, one display device with a touch interface, one graphical interface computer and one electronic computing unit, the set being designed to graphically present a plurality of commands, each command being classed in at least a first category, referred to as the critical category, and a second category, referred to as the non-critical category, each non-critical command having a plurality of options, each option having a name, said names assembled in a database called a “lexicon”. The method according to the invention comprises steps of recognizing displayed commands, activating the speech recognition unit, comparing the touch and voice information and a validation step.