Consecutive crowbar circuit breaker专利检索-浪涌电流电流电路专利检索查询-专利查询网

Consecutive crowbar circuit breaker

阅读：621发布：2023-12-26

专利汇可以提供Consecutive crowbar circuit breaker专利检索，专利查询，专利分析的服务。并且A circuit breaker is inserted in a high-current, high-voltage DC power line between the source and the load. The circuit breaker comprises a parallel connection of a transfer switch, an electronic switch, a first consecutive interrupter having a preferably nonlinear resistor in series therewith, and a second consecutive interrupter having a preferably nonlinear resistor in series therewith. Furthermore, a surge capacitor and its suppression resistance are serially connected in parallel around the second consecutive interrupter. When a fault occurs, the transfer switch is opened and is deionized during conduction of the electronic switch. Offswitching of the electronic switch causes current flow through the two parallel consecutive interrupters with their series resistances to decrease circuit current. During the period that the consecutive interrupters are sequentially opened, the electronic switch is conductive so that the consecutive interrupters can be deionized.，下面是Consecutive crowbar circuit breaker专利的具体信息内容。

权利要求

1. A DC circuit interrupter comprising a DC electric line and transfer switch, contacts connected in said DC electric line to open said DC electric line; an electronic switch capable of interrupting DC current initially flowing therethrough connected in parallel to said transfer switch contacts; a series combination of first consecutive interrupter contacts and first resistor connected in parallel to said transfer switch contacts; a series combination of second consecutive interrupter contacts and a resistor connected in parallel to said transfer switch contacts, a capacitor connected across said second consecutive interrupter contacts; and control means connected to operate said transfer switch contacts, said electronic switch, said first consecutive interrupter contacts and said second consecutive interrupter contacts for successive opening of said transfer switch contacts, said first consecutive interrupter and said second consecutive interrupter and for causing said electronic switch to be conductive during each of the successive openings and nonconductive intermediate the openings so that said electronic switch is conductive during opening of said contacts to stop current flow through said contacts and permit them to deionize.

2. The interrupter of claim 1 wherein said first and second resistors respectively in series with said first and second consecutive interrupter contacts are nonlinear resistors.

3. The interrupter of claim 2 wherein a series combination of a surge capacitor and a surge suppression resistor is connected in parallel to said transfer switch contacts to absorb current Upon electronic switch opening.

4. The interrupter of claim 3 wherein said series connected surge capacitor and surge suppression resistor are connected in parallel across said second consecutive interrupter contacts.

5. The interrupter of claim 4 wherein fault sensing means is connected to said DC line to detect a fault therein, said fault sensing means being connected to said control means so that upon the sensing of a fault in said DC line, said control means causes said interrupter to open.

6. The interrupter of claim 5 wherein said electronic switch is a crossed field switch tube.

7. The interrupter of claim 5 wherein said electronic switch is a liquid metal cathode switch tube.

8. The interrupter of claim 1 wherein fault sensing means is connected to said DC line to detect a fault therein, said fault sensing means being connected to said control means so that upon the sensing of a fault in said DC line, said control means causes said interrupter to open.

9. The interrupter of claim 1 wherein said electronic switch is a crossed field switch tube.

10. The interrupter of claim 1 wherein said electronic switch is a liquid metal cathode switch tube. 11. The method of interrupting a DC circuit having direct current flowing through transfer switch contacts serially connected in the circuit and having connected in parallel to the transfer switch contacts and in parallel to each other an electronic switch, a first consecutive interrupter having serially connected contacts and resistance, and a second consecutive interrupter having serially connected contacts and resistance comprising the consecutive steps of: opening the transfer switch contacts while the electronic switch is conductive to permit deionization and discontinuance of current flow through the transfer switch contacts; making the electronic switch nonconductive while said contacts of the first consecutive interrupter are closed to cause DC current flow through said the consecutive interrupter contacts and its respective series resistance to increase circuit impedance and reduce current flow therein; opening the contacts of the first consecutive interrupter while the electronic switch is conductive to permit deionization and discontinuance of current flow through the contacts of the first consecutive interrupter; and terminating conduction through the electronic switch while the contacts of said second consecutive interrupter are closed to cause current flow through the consecutive interrupter contacts and respective resistance to further increase circuit impedance.

12. The process of claim 1 including the further additional steps of: opening the contacts of the second consecutive interrupter while said electronic switch is conductive to permit deionization and discontinuance of conduction through the contacts of said second consecutive interrupter; and causing discontinuance of conduction through the electronic switch and absorbing the off-switching voltage pulse in a capacitor connected in parallel to said transfer switch contacts.

说明书全文

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Consecutive crowbar circuit breaker

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