Novel circuit breaker

Abstract

The invention provides a novel circuit breaker. According to the circuit breaker, inherent problems such as arcing of contacts of traditional mechanical switches, ageing of contact springs and the like can be effectively solved, switching speeds are greatly increased, service lives of the switches are prolonged, and the extreme requirements of sensitive and critical loads for the power supply reliability and the electric energy quality are met. The circuit breaker comprises a circuit breaker body, a protection unit, a data acquisition unit and a controller, wherein the circuit breaker body is arranged between a line incoming end of a main power supply line and a user; the protection unit is connected with the circuit breaker body in parallel; the data acquisition unit is connected with the circuit breaker body and acquires electric signals of the main power supply line through a sensing device; and the data acquisition unit and the protection unit are connected with the controller respectively. According to the circuit breaker, 'power switching' is actually formed when the circuit breaker is turned off, the switching time reaches the millisecond level, seamless switching can be realized, the rapidity and the transient characteristic are ideal, and the extreme requirements of the sensitive and critical loads for the power supply reliability and the electric energy quality are truly met.

Description

technical field [0001] The invention relates to a circuit breaker, in particular to a circuit breaker in which an electronic switch device is connected in parallel with a traditional circuit breaker. Background technique [0002] A circuit breaker is a commonly used protective device, which can realize functions such as short circuit and overload. The circuit breaker is used as a main power protection switch or a branch line protection switch in the power supply. When a short circuit or overload occurs in residential lines or household appliances, it can automatically trip and cut off the power supply, thereby effectively protecting these devices from damage or preventing accidents from expanding. [0003] Circuit breakers generally adopt a mechanical structure. In the contact system of this circuit breaker, the contact spring will be deformed, oxidized, and the tension will disappear or decrease after long-term use, resulting in insufficient contact pressure, thereby caus...

AI Technical Summary

Problems solved by technology

[0004] In view of the above problems, the present invention provides a new type of circuit breaker, which can effectively solve the inherent problems of traditional mechanical switches such as contact arcing and contact spring aging, greatly improve the switching speed and the service life of the switch, and meet the needs of sensitive and critical loads. Stringent requirements for power supply reliability and power quality

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