Arc-free series intelligent bridge high voltage circuit breaker

Abstract

The invention provides a non-arc, series and intelligent bridge type high-voltage circuit breaker. The non-arc, series and intelligent bridge type high-voltage circuit breaker comprises a mechanical switch K, a voltage increase bridge switch, a controller P and input and output monitoring instruments V1 and V2; the voltage increase bridge switch is that diodes D1, D2, D3 and D4 are used as bridge arms, and non-contact switches (T1, T2..., Tn, wherein n is not less than 2) sets which are interconnected in series are used as a bridge, a connecting point of a positive electrode of the D1 and a negative electrode of the D2 is used as a bridge input end, and the connecting point of the positive electrode of the D3 and the negative electrode of the D4 is used as the bridge output end; the bridge input end and a K contact input end are synchronously connected to a high voltage input (IR) end, and while the bridge output end and a K contact output end are synchronously connected a high voltage output (OUT) end; a control electrode of each control set is connected with the P; when switching off, the K contact is disconnected and then the switch sets are disconnected; when switching on, the switch sets are connected and then the K contact is connected; therefore, the arc generating condition of the circuit breaker can be removed; the circuit breaker replaces the existing high-voltage circuit breaker, and the topic of preventing and controlling arc of the high-voltage circuit breaker is avoided.

Description

technical field [0001] The invention mainly relates to the field of high-voltage electric power, in particular to a high-voltage circuit breaker with a voltage level above 3KV. Background technique [0002] Historically, the key to why all kinds of high-power circuit breakers installed in the power supply and distribution equipment of the power system can connect or disconnect various load circuits according to people's will, especially to reliably disconnect short-circuit fault circuits It lies in the arc extinguishing function of the circuit breaker arc extinguishing system. [0003] As we all know, when the non-no-load circuit is manually or automatically controlled, especially when tripping for various short-circuit protection and isolation, the moving contact and the static contact of the circuit breaker will Due to the small spacing, a strong electric field is formed under the rated voltage, causing ionization breakdown of the medium or air, thereby generating an arc ...

AI Technical Summary

Problems solved by technology

However, in practice, it is found that high-power power electronic modules carry load current for a long time to generate large power consumption, and their unavoidable thermal hidden dangers bring greater risks and hidden dangers to system safety, so they cannot replace mechanical switches, let alone medium , High voltage power circuit breaker

[0007] For more than 100 years since the birth of power circuit breakers, experts in product research and development have always focused on the problem of arc extinguishing of large currents (short-circuit currents) and struggled hard; No one cared about the change of the basic structure and basic mode of the circuit breaker, and no one launched a high-power circuit breaker solution that can avoid the switch arc and avoid the risk of online heat loss.

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