smart circuit breaker

Abstract

The invention provides an intelligent circuit breaker. The intelligent circuit breaker comprises a shell, and a contact system, an electric operating mechanism and a circuit board for controlling the action of the electric operating mechanism, wherein the contact system, the electric operating mechanism and the circuit board are arranged in the shell; the contact system comprises a movable contact and a fixed contact in mutual matching, the movable contact is provided with an on-position communicated with the fixed contact and a separation position separated from the fixed contact; the electric operating mechanism is used for driving the movable contact to act; the circuit board is used for driving the electric operating mechanism to act when a main loop of the circuit breaker is in outage so as to drive the movable contact to move to the separation position, the circuit board is used for driving the electric operating mechanism to reversely act when the main loop is repowered so as to drive the movable contact to move to the on-position, and the circuit board can be used for receiving an external signal in the power-on period of the main loop so as to drive the electric operating mechanism to act, and then driving the movable contact to move to the separation position or the on-position.

Description

technical field [0001] The invention relates to the technical field of circuit breakers, in particular to an intelligent circuit breaker. Background technique [0002] At present, there are various types of circuit breakers with different working principles. One type of circuit breaker uses circuit protection mechanisms such as short-circuit current relays and bimetallic strips and tripping mechanisms that cooperate with these protection mechanisms, and sets the moving contacts on the tripping mechanism, through which the circuit protection mechanism controls the circuit. The corresponding action in the event of overload, overcurrent, short circuit, etc., drives the tripping mechanism to move and then drives the moving contact to separate from the static contact, so as to realize the disconnection protection of the circuit. [0003] The Chinese patent document (authorized announcement number: CN203760401U) previously applied by the applicant discloses an improved circuit br...

AI Technical Summary

Problems solved by technology

[0004] However, the prior art has the following problems in actual use: 1. When the circuit breaker in working state (i.e., the moving and static contacts are connected) encounters a sudden power failure of the main circuit, the moving and static contacts are still in the connected state, At this time, if the main circuit suddenly receives a call, the moving and static contacts in the connected state will instantly pass through the current. Generally, the power-on time of the moving and static contacts is about a few milliseconds. The time for whether there is a fault current is about tens or even hundreds of milliseconds, which leads to the blank period of circuit breaker control during the period when there is current in the moving contact and the circuit board judges whether there is a fault current in the circuit breaker. At this time, the current passing between the moving and static contacts is a fault current, so the fault current may quickly damage the internal components of the circuit breaker, and even cause serious safety problems. Therefore, this prior art circuit breaker has great safety Hidden dangers; 2. The circuit breakers in the prior art can only be manually operated on site, the application is limited, and cannot meet the current market requirements for circuit breakers

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