在分析国内外高电压等级真空开关研究的基础上,提出了研发126kV双断口真空断路器的必要性和可行性,并针对双断口真空开关存在的缺陷提出了懈决措施。在双断口均压问题上,笔者给出一种新型126kV双断口真空断路器,通过理论分析。表明这种设计具有较好的断口均压特性,避免了采用断口并联电容均压方式带来的不利影响。利用永磁机构传动精度高的特点,将其应用在双断口真空断路器中,保证了双断口合分动作的同步性。
By analyzing the current researches of high voltage vacuum switch, the necessity and feasibility to research and develop 126 kV double-break vacuum circuit breaker are demonstrated, and some countermeasures are presented against the defects of the conventional double-break vacuum switch. Consequently, a new type of 126 kV double-break vacuum circuit breaker is proposed, and theoretical analysis illustrates its better voltage distribution in each break to avoid the adverse influence of voltage-sharing capacitance in parallel with each break. A permanent magnetic actuator with high moving precision is applied to the double-break vaouum circuit breaker to ensure the synchronization of double-break action .