Abnormal charge and electric leakage single-phase breaker

Abstract

A single-phase breaker can conduct releasing and tripping within 0.1 s when a housing of an electrical appliance has abnormal charge or leakage or short circuit in other forms during overloading. The breaker has four parts: a single-phase breaker, a handset charger circuit board, a star resistor set, and a series body. If a housing of an electrical appliance carries an abnormal voltage, the housing and a load-side neutral wire of the single-phase breaker supply power to the handset charger circuit board, the handset charger circuit board generates a 5 V DC voltage and applies the voltage to two series ends of a 100 K[ohm] resistor and a 33 K[ohm] resistor of the star resistor set, and a 2.81 V DC voltage is divided from a middle connection point of the 100 K[ohm] resistor and the 33 K[ohm] resistor and applied to one end of a photoresistor. If the protected housing carries an abnormal AC voltage, a laser emitting tube emits light to induce quick reduction of the resistance of the adjacent photoresistor so that the photo resistor is conducted, a 0.3 V DC voltage appears at the other terminal of the photoresistor and is applied to a control electrode of a thyristor of the breaker, so that the thyristor is conducted, and the breaker conducts a releasing action to cut off power supply.

Description

technical field [0001] A single-phase circuit breaker, which is used for the safety protection of electricity in general households, offices, and some places where electricity is used. When the electric appliance shell is charged with a dangerous voltage of 140V~250V in the phase line of the commercial electricity, it will automatically trip and cut off the power supply within 0.1S, or And when ≥30mA leakage occurs, it will automatically trip and cut off the power supply within 0.1S, and when a short circuit fault occurs on the load side, it will automatically trip and cut off the power supply within 0.1S. Background technique [0002] At present, the single-phase circuit breakers sold in the market can only provide circuit breaker protection when the leakage current is greater than or equal to 30mA. Existing circuit breakers trip and disconnect (such as Konka Electric leakage circuit breaker DZ15LE-40 / 2901), thereby endangering the safety of electricity users. The inventive...

AI Technical Summary

Problems solved by technology

[0002] At present, the single-phase circuit breakers sold in the market can only provide circuit breaker protection when the leakage current is greater than or equal to 30mA. The existing circuit breaker trips and breaks the circuit (such as Konka Electric leakage circuit breaker DZ15LE-40 / 2901), which endangers the safety of electricity users. The inventive device can solve this problem and avoid malfunction

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