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- 1
- 00:00:00,000 --> 00:00:02,373
- 这是一个最简单的电路
- 2
- 00:00:02,373 --> 00:00:06,026
- 灯泡、开关、和一个5伏的电池
- 3
- 00:00:06,027 --> 00:00:09,320
- 我们忽然打开开关 灯就会熄灭
- 4
- 00:00:09,320 --> 00:00:12,733
- 电流几乎是光速传播
- 5
- 00:00:12,734 --> 00:00:14,400
- 对这个电路来说
- 6
- 00:00:14,400 --> 00:00:16,814
- 几乎不值得一提
- 7
- 00:00:16,814 --> 00:00:22,640
- 但是对于这条110千伏的线路来说 却有很大不同
- 8
- 00:00:22,641 --> 00:00:23,841
- 你能想到
- 9
- 00:00:23,841 --> 00:00:29,961
- 我们忽然拉开和家里开关几乎一样的110千伏的隔离刀闸
- 10
- 00:00:29,961 --> 00:00:33,541
- 隔离刀闸虽然已经出现明显断开点
- 11
- 00:00:33,541 --> 00:00:37,066
- 但是高的电压和电流还是击穿了空气
- 12
- 00:00:37,067 --> 00:00:38,932
- 出现强烈的火花
- 13
- 00:00:38,932 --> 00:00:41,997
- 隔离开关的触点很快就会熔掉
- 14
- 00:00:41,997 --> 00:00:43,227
- 损坏我们的设备
- 15
- 00:00:43,855 --> 00:00:48,775
- 这个时候六氟化硫高压断路器就显现了他的作用
- 16
- 00:00:48,775 --> 00:00:52,500
- 断路器静触头、动触头是紧密插接的
- 17
- 00:00:52,500 --> 00:00:55,905
- 下端动气缸的气缸喷头高于动触头
- 18
- 00:00:55,908 --> 00:00:58,438
- 且和上端气缸紧密连接
- 19
- 00:00:58,438 --> 00:01:01,688
- 而上端静触头是插入到下端气缸中的
- 20
- 00:01:02,322 --> 00:01:04,308
- 当断路器分闸时
- 21
- 00:01:04,993 --> 00:01:07,348
- 动触头往下运动的同时
- 22
- 00:01:07,348 --> 00:01:09,913
- 带动下端动气缸一起运动
- 23
- 00:01:09,913 --> 00:01:11,903
- 随着气缸空间的缩小
- 24
- 00:01:11,908 --> 00:01:15,402
- 气缸里的六氟化硫气体被压缩
- 25
- 00:01:15,402 --> 00:01:17,857
- 首先分离的是动静触头
- 26
- 00:01:17,857 --> 00:01:20,967
- 分开瞬间由于距离小且电压高
- 27
- 00:01:20,967 --> 00:01:22,308
- 会击穿绝缘
- 28
- 00:01:22,308 --> 00:01:23,788
- 拉出电弧
- 29
- 00:01:23,789 --> 00:01:25,559
- 随着运动的继续
- 30
- 00:01:25,559 --> 00:01:28,734
- 当上端静触头离开下端气缸
- 31
- 00:01:28,734 --> 00:01:31,389
- 对下端气缸的密闭会被打开
- 32
- 00:01:31,389 --> 00:01:35,649
- 气缸里压缩的高压气体通过喇叭口气缸喷嘴
- 33
- 00:01:35,649 --> 00:01:37,224
- 形成爆炸式喷发
- 34
- 00:01:37,843 --> 00:01:41,113
- 由于六氟化硫气体具有高负性
- 35
- 00:01:41,113 --> 00:01:43,143
- 能够迅速吸收电子
- 36
- 00:01:43,143 --> 00:01:45,456
- 形成高浓度负离子空间
- 37
- 00:01:45,456 --> 00:01:48,101
- 使电子迁移率大大降低
- 38
- 00:01:48,101 --> 00:01:50,996
- 加上爆炸式气体横向冲击
- 39
- 00:01:50,996 --> 00:01:54,976
- 较冷的六氟化硫气体降低炙热的电弧的热度
- 40
- 00:01:54,976 --> 00:01:58,026
- 以及动静触头分离的距离增大
- 41
- 00:01:58,026 --> 00:01:59,406
- 四个条件下
- 42
- 00:01:59,406 --> 00:02:01,361
- 使电弧迅速熄灭
- 43
- 00:02:01,361 --> 00:02:02,066
- 消散
- 44
- 00:02:02,069 --> 00:02:04,896
- 从而完成了媳弧灭弧的功能
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