Circuit breaker with electric leakage protection function and use method of circuit breaker

Abstract

The invention related to a circuit breaker with an electric leakage protection function. The circuit breaker comprises a circuit breaker shell and an electric leakage test apparatus, wherein the electric leakage test apparatus comprises a sliding button, a built-in torsional spring, a metal probe and a metal circular pipe; the built-in torsional spring, the metal probe and the metal circular pipe are connected with a current-limiting resistor in series and then connected with a power supply in parallel; a use method of the circuit breaker with the electric leakage protection function comprises the following steps of step 1, performing a detection method in a normal state: 1.1, upwardly pushing a handle to realize power transmission; 1.2, performing a pressing test; 1.3, performing automatic resetting; and 1.4, performing limiting and releasing prevention; step 2, performing a method for preventing wrong power transmission in a detection state: 2.1, downwardly pulling the handle to realize power outage; 2.2, enabling the sliding button to be normally closed; and 2.3, performing automatic power outage when the handle is upwardly pushed wrongly, wherein an analog electric leakage circuit is in a switched-on state constantly, so that when the handle is upwardly pushed wrongly by an operator, a release apparatus of the circuit breaker acts to enable the circuit breaker to be in a power outage state, and the handle is restored to the downward pulling state, so as to effectively protect the maintenance staff.

Description

technical field [0001] The invention relates to the technical field of secondary equipment in a power system, in particular to a circuit breaker with leakage protection and a use method thereof. Background technique [0002] Leakage circuit breaker is a switch that can automatically operate when the leakage current in the circuit exceeds a predetermined value, mainly to prevent personal electric shock. Some circuit breakers are also integrated with residual current protection. In the event of leakage, the tripping device operates to cut off the power of the circuit breaker. [0003] When the power system personnel overhaul the circuit, they will first open the handle to ensure that the line is powered off, and then overhaul the line. If the maintenance line is far away, other operating personnel may close the handle by mistake due to ignorance, and the power supply line is suddenly connected without the maintenance personnel's knowledge, making the maintenance personnel in ...

AI Technical Summary

Problems solved by technology

However, the above-mentioned technical solution utilizes the position-limiting effect of the mechanical structure to prevent misalignment, but it has many defects: for example, the positioning pin is too small to be easily operated, and it is necessary to use external instruments such as clips or pointed vertebrae to assist the operation.

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