Method for testing capacitive current switching of a circuit breaker
AssigneeSchneider Electric Industries SAS
InventorsDiego Alberto, Jean-Pierre Gauthier, Anthony Papillon, Xavier Godechot
Life of this patent
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Abstract
A method for testing capacitive current switching of a circuit breaker, including: realizing a capacitive current switching by the circuit breaker, measuring voltage at the terminals of the circuit breaker after the capacitive current switching, calculating the gradient of the measured voltage, determining whether there is at least one point of gradient whose amplitude exhibits an absolute value greater than a first predetermined threshold, and when such a point is determined, identifying the instant of appearance of the determined point and of the amplitude of variation of the voltage at that instant, as voltage drop.
Claims9
A method for testing capacitive current switching of a circuit breaker including a station for capacitive current switching of the circuit breaker, the station including an electrical module to create an inrush current, an electrical module to create a capacitive current, an electrical module to create a recovery voltage after the capacitive current switching, and a synchronisation module to synchronise the electrical modules, the method comprising:
- performing a capacitive current switching of the circuit breaker by using the electrical module to create an inrush current, the electrical module to create a capacitive current, the electrical module to create a recovery voltage after the capacitive current switching, and the synchronisation module to synchronise the electrical modules,
- measuring voltage at the terminals of the circuit breaker after the capacitive current switching,
- calculating the gradient of the measured voltage,
- determining whether there is at least one point of gradient whose amplitude exhibits an absolute value greater than a first predetermined threshold, and when such a point is determined,
- identifying the instant of appearance of the determined point and of the amplitude of variation of the voltage at that instant, as voltage drop.
A station for testing capacitive current switching of a circuit breaker, comprising:
- electrical modules suitable for carrying out a capacitive current switching by the circuit breaker, the electrical modules including an electrical module configured to create an inrush current, an electrical module configured to create a capacitive current, an electrical module configured to create a recovery voltage after the capacitive current switching, and a synchronisation module configured to synchronise the electrical modules, and
- a data acquisition and processing chain suitable for measuring the voltage at the terminals of the circuit breaker after the capacitive current switching, to calculate the gradient of the measured voltage, to determine whether there is at least one point of gradient whose amplitude exhibits an absolute value greater than a first predetermined threshold, and when such a point is determined, and to identify the instant of appearance of the determined point and the amplitude of variation of the voltage at that instant, as voltage drop.
Dependencies are inferred from the claim text.