Automatic reset ground fault breaker and control circuit structure of automatic reset ground fault breaker

Abstract

The invention provides a control circuit of an automatic reset ground fault breaker. The control circuit comprises a ground fault detection circuit, an energy storage critical triggering circuit and a capacitive reactance voltage reduction circuit. The capacitive reactance voltage reduction circuit comprises a resistor and a capacitor which are connected in series, the two ends of the capacitive reactance voltage reduction circuit are connected with a null line and the energy storage critical triggering circuit respectively, the energy storage critical triggering circuit is used for storing electric energy and starting a coil, and the coil controls the automatic reset ground fault breaker to be connected or disconnected. The invention further provides a structure of the automatic reset ground fault breaker. Voltage reduction can be carried out through the capacitive reactance voltage reduction circuit under the condition that energy losses are avoided, then the energy is stored in an energy storage capacitor of the energy storage critical triggering circuit until the energy reaches a preset numerical value, a coil starting switch is controlled to connect the coil, and then the coil is kept in the connection state with low power. Due to the fact that the breaker must be capable of continuously working for a long time, compared with a traditional technology, the mean has the advantages that energy consumption can be greatly reduced; meanwhile, generated heat is less, and the service life of the coil can be prolonged.

Description

technical field [0001] The invention relates to the field of electronic devices, in particular to a ground fault circuit breaker capable of automatic reset. Background technique [0002] The automatic reset ground fault circuit breaker is a protective device used to prevent personal electric shock and electrical fire when the circuit or electrical insulation is damaged and a ground leakage fault occurs. The typical structure is: the ground fault circuit breaker controls at least one pair or more The contact between the load and the source and consisting of at least one moving contact mechanism engaged to a fixed contact on the other side. The function of the electromagnet is to make a pair or more of the contact points join together to conduct the circuit. The electromagnet is controlled by a set of electronic circuits. When the leakage detection circuit detects that a ground leakage fault occurs, the circuit will change its state in various ways, so that the moving contac...

AI Technical Summary

Problems solved by technology

This kind of voltage reduction method will bring great adverse effects, because of the large pressure difference, the energy value wasted on the resistance is relatively large, and the result will be high temperature and overheating, which will affect other electronic components. It will have adverse effects on the coil group, which will reduce its service life, stability during use, and even burn out

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