真空断路器的设计

文档编号:JD575 包括设计图,文档字数:17282,页数:30

真空断路器的电气设计

【摘要】利用真空作为绝缘及灭弧手段的断路器称为真空断路器,根据给定的技术参数,正确合理的选择和设计真空灭弧室结构形式.主回路的设计原则必须保证电器动热稳定性合格,以导电板及导电带的设计为主.绝缘子的设计要具有一定的机械和电气强度,即绝缘子的击穿电压大于闪络电压50%.电动稳定性校验原则为导电板的动稳定电流大于三相短路电流,及其内应力要小于许用应力.热稳定性校验原则为导电板及导电带能承受短路电流的热效应而不致损坏,即短路终止的温升小于最大发热温升.操动机构的设计原则为保证断路器能及时准确的合闸,保持合闸,分闸,自由脱扣,防跳和复位连锁的功能.
【关键词】真空断路器      真空灭弧室    主回路    动热稳定性  

VACUUM CIRCUIT BREAKER

Abstract： Utilize vacuum to call the vacuum circuit breaker as the insulating circuit breaker killing the arc means。According to giving the technical parameter definitely, correct and rational choice and design vacuum kill the structure form of arc room. The design principle of the main return circuit must guarantee it is qualified that the electric apparatus moves hot stability , with conductive board and as the main fact design that electric conduction lead. The design of the insulator should have certain machinery and electric intensity, namely the voltage of puncture of the insulator is greater than flashing to hold 50% of voltage in place with a net. Electronic stability check-up for to move steady electric current greater than three-phase short out in the electric current conductive board principle, and internal stress should be smaller than letting to use the stress。Hot stability check-up principle is it can is it short out for conductive board and electric conduction the heat effect of the electric current is unlikely to damage to bear to take, short out ShengXiao Wen that stop on most heavy to generate heat warm to rise. Is it move design principle of organization for guarantee circuit breaker can the accurate equal to the floodgating in time to speak, keeping shutting the floodgate, divide the floodgate , freedom is taken off and deducted, defend and jump and restored to the throne the function of the chain.
Key  words: vacuum circuit breaker; vacuum interrupter; design of the main return circuit；
move hot stability check-up； calculation of the speed of the divide-shut brake

目    录
摘要………………………………………………………………………………………I
第一章  绪论……………………………………………………………………………1
1.1 断路器的发展概况………………………………………………………………1
1.2 真空断路器的特点………………………………………………………………2
1.3 产品型号及意义…………………………………………………………………4
第二章  真空灭弧室的设计……………………………………………………………5
2.1 外壳材料的选择…………………………………………………………………5
2.2 真空电弧…………………………………………………………………………6
2.3 真空击穿…………………………………………………………………………7
2.4 灭弧原理…………………………………………………………………………7
2.5 真空灭弧室的过电压保护………………………………………………………7
2.6 真空和真空度……………………………………………………………………8
2.7 波纹管屏蔽罩……………………………………………………………………8
2.8 其它零部件………………………………………………………………………9
2.9 真空灭弧室的寿命………………………………………………………………10
第三章  主回路的设计 触头设计 ……………………………………………………11
3.1 导电板的选择……………………………………………………………………11
3.2 导电带的设计……………………………………………………………………12
3.3 触头设计…………………………………………………………………………12
第四章  动、热稳定性校验……………………………………………………………15
4.1 电动稳定性校验…………………………………………………………………15
4.2 导热稳定性校验…………………………………………………………………16
第五章  绝缘子的选择…………………………………………………………………18
5.1 绝缘概述…………………………………………………………………………18
5.2 绝缘子的选择和绝缘计算………………………………………………………18
5.3 绝缘子的校验……………………………………………………………………19
第六章  断路器操动机构及有关计算…………………………………………………20
6.1 对操动机构的要求………………………………………………………………20
6.2 操动机构的形式及选用…………………………………………………………21
6.3 机械特性的要求…………………………………………………………………22
第七章  分合闸速度的计算……………………………………………………………24
7.1 质量的计算………………………………………………………………………24
7.2 转动惯量的计算…………………………………………………………………25
7.3 质量的归算………………………………………………………………………25
7.4 力的计算…………………………………………………………………………25
7.5 分闸速度和时间的计算…………………………………………………………26
小结………………………………………………………………………………………28
参考文献…………………………………………………………………………………29
致谢………………………………………………………………………………………30
附图………………………………………………………………………………………31

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