METHOD FOR DETERMINING A CAUSE OF A VOLTAGE OUTAGE LOAD-SIDE FROM A CIRCUIT BREAKER, AUXILIARY UNIT FOR A CIRCUIT BREAKER, ELECTRIC SYSTEM COMPRISING A CIRCUIT BREAKER AND ONE SUCH AUXILIARY UNIT

摘要

In this method, the voltage outage load-side is an opening of the circuit breaker, and the circuit breaker is able to interrupt the flow of electric current in an electric connection including an electric conductor. The auxiliary unit comprises a current sensor for measuring the intensity of the current flowing in the electric conductor and a first detection means for detecting the voltage outage load-side from the circuit breaker. The method comprises the following steps: measuring the intensity of the current flowing in the electric conductor, detecting the voltage outage load-side from the electric circuit breaker, determining a cause of the detected voltage outage load-side from the circuit breaker, said cause being selected from the group consisting in: an electric overload, a short-circuit and a voltage drop.

主权项

1. A method for determining a cause of a voltage outage load-side from a circuit breaker by means of an auxiliary unit, the voltage outage load-side corresponding to an opening of the circuit breaker or to a voltage drop at the input of the circuit breaker below a first reference voltage value, the circuit breaker being in an open position able to interrupt the flow of an electric current in an electric connection including at least one electric conductor,
the auxiliary unit comprising at least one current sensor able to measure the intensity of the current flowing in a respective electric conductor and a first detection means able to detect the voltage outage load-side from the circuit breaker, the method comprising the following steps:
a) measuring, with said or each current sensor, the intensity of the current flowing in said or each electric conductor,b) detecting, via the first detection means, the voltage outage load-side from the electric circuit breaker,c) determining, with the auxiliary unit and depending on the intensity measured by said or each current sensor, a detected cause of a voltage outage load-side from the circuit breaker, said cause being perfectly selected from the group consisting in: an electric overload, a short-circuit and a voltage drop.