Method and device for monitoring the operating state of circuit breakers
AssigneeSmartfuture SAS
InventorPaul Bertrand
Life of this patent
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Abstract
A method for monitoring the operating state of a set of circuit breakers includes the steps of arranging on the wall of each circuit breaker a synchronous triaxial digital magnetometer on a semiconductor chip, cyclically and synchronously reading temperatures measured by the magnetometers and from the temperatures measured by the magnetometers and a value of the ambient temperature, determining, for each circuit breaker, whether an internal heating temperature of the circuit breaker reaches a first temperature threshold which may be representative of an anomaly of the operating state of the circuit breaker.
Claims21
A method of monitoring the operating state of a set of circuit breakers, each circuit breaker comprising a protective coil and having a wall through which a magnetic field emitted by the coil passes, the method comprising the steps of:
- arranging on the wall of each circuit breaker a synchronous triaxial digital magnetometer on a semiconductor chip, each magnetometer comprising magnetic field measuring means and an internal temperature sensor, and a data output for providing magnetic field and temperature measurements,
- the method comprising the steps of:
- cyclically and synchronously reading, at successive times, the temperatures provided by the magnetometers,
- from the temperatures measured by the magnetometers and a value of the ambient temperature, determining, for each circuit breaker, whether an internal heating temperature of the circuit breaker reaches a first temperature threshold which may be representative of an anomaly in the operating state of the circuit breaker, and
- emitting an alarm of a first type when the internal heating temperature of at least one circuit breaker reaches the first temperature threshold.
A device for monitoring the operating state of a set of circuit breakers, each circuit breaker comprising a protective coil and having a wall through which a magnetic field emitted by the coil passes, the device comprising:
- a set of synchronous triaxial digital magnetometers on semiconductor chips, each magnetometer being arranged on the wall of a circuit breaker and comprising magnetic field measuring means, an internal temperature sensor and a data output for providing magnetic field and temperature measurements, and
- a control circuit connected to the magnetometers, characterized in that the control circuit is configured to:
- cyclically and synchronously read, at successive times, the temperatures measured by the magnetometers,
- from the temperatures measured by the magnetometers and a value of the ambient temperature, determine, for each circuit breaker, whether an internal heating temperature of the circuit breaker reaches a first temperature threshold which may be representative of an anomaly in the operating state of the circuit breaker, and
- emit an alarm of a first type when the internal heating temperature of at least one circuit breaker reaches the first temperature threshold.
Dependencies are inferred from the claim text.