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330kV SF6高压断路器培训课件.ppt

  • 2026-06-28 20:05:09
330kV SF6高压断路器培训课件.ppt
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2.1灭弧室

整个灭弧室由三部分组成。

动触头装配:由喷管(6)、动触头环(7)、动弧触头(8)、压气缸(9)、动触头(10)、缸体(11)组成。

静触头装配:由静触头座(1)、均压罩(2)、触指(3)、触指弹簧(4)、静弧触头(5)组成。

瓷套装配:由鼓形瓷套及法兰组成。

2.2支柱

支柱主要由两节支柱瓷套(1)、(5)、绝缘拉杆(2)、隔环(3)、导向盘(4)、支柱下法兰(6)、密封座(7)、拉杆(8)及充气接头(9)组成。

支柱装配不仅是断路器对地绝缘的支撑件,同时也起着支撑灭弧室的作用,上、下两节支柱瓷套的尺寸相同但机械强度不同。两瓷套连接处装有隔环及导向盘,隔环上有检漏孔。

3.本体的工作原理

3.1合闸

如右所示位置为分闸位置,当断路器合闸时,工作缸活塞杆向上运动,通过拉杆(支柱图 中8)、绝缘拉杆(支柱图中2)带动灭弧室拉杆向上移动,使动触头(右图中10)、压气缸(右图中9)、动弧触头(右图 中8)、喷管(右图中6)同时向上移动,运动到一定位置时,静弧触头首先插入动弧触头中,即弧触头首先合闸,紧接着动触头环插入主触指中主导电回路接通。压气缸快速向上移动的同时灭弧室内SF6 气体迅速进入压气缸内。

3.2合闸时电流通路

电流由静触头座(1) 的端子进入,经静触头座、触指(3)、动触头环(7)、压气缸(9)( 对LW10B252/CYT 为动触头)、缸体(11)及缸体上的下接线端子引出。

3.3分闸

工作缸活塞杆向下运动,通过绝缘拉杆、带动动触头系统向下移动,首先主触指和动触头环脱离接触,然后弧触头(5)和(8)分离。若断路器带有高电压,此时将在弧触头间出现电弧。在动触头向下运动时,压气缸内的SF6 气体被压缩后通过喷管向电弧区域喷吹,使电弧冷却和去游离而熄灭,并使断口间的介质强度迅速恢复,以达到开断额定电流及各种故障电流的目的。

3.2 动作原理

3.2.1贮压:接通电源,电机(M)带动油泵转动,油箱中的低压油经油泵,进入贮压器上部,压缩下部的氮气,形成高压油。由于贮压器的上部与工作缸活塞上部及控制阀、信号缸、油压开关相连通,因此,高压油同时进入图3-6 中所示的高压油区域,当油压达到额定工作压力值时,油压开关的相应接点断开,切断电机电源,完成贮压过程。在贮压过程中或贮压完成后,如果由于温度变化或其它意外原因使得油压升高达到油压开关内安全阀的开启压力时,安全阀将自动泄压,把高压油放回到油箱中,当油压降到规定的压力值时,安全阀自动关闭。

3.2.2 合闸操作:

分闸位置时,见下图,工作缸活塞上部处于高油压状态,活塞下部与油箱连通处于零压状态。

合闸电磁铁接受命令后,打开合闸一级阀的阀口,高压油经一级阀进入二级阀阀杆右端空腔,使阀杆右端处于高油压状态,油压力推动阀杆向左运动,由于阀芯左右受力面积不等,高压油推动阀芯向左运动,封住分闸阀口,打开合闸阀口。这样,工作缸活塞下部与低压隔离,与高压连通。由于工作缸活塞下部的受力面积大于上部,因此对活塞杆产生一个向上的力,推动活塞向上运动实现合闸。

工作缸活塞下部进入高压油的同时,信号缸左端也进入高压油,推动信号缸活塞向右运动并带动辅助开关转换,切断合闸命令,分闸回路接通。同时主控室内的合闸指示信号接通。

合闸电磁铁断电后,合闸一级阀阀杆在复位弹簧的作用下复位,阀口关闭。此时二级阀阀杆左端通过节流孔与高压油连通自保持为高压状态,使阀芯仍然紧密封住分闸阀口,实现了合闸保持。

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  1. CONNECT:[ UseTime:0.000607s ] mysql:host=127.0.0.1;port=3306;dbname=a_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000699s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000317s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000259s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000477s ]
  6. SELECT * FROM `set` [ RunTime:0.000210s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000513s ]
  8. SELECT * FROM `article` WHERE `id` = 502989 LIMIT 1 [ RunTime:0.000462s ]
  9. UPDATE `article` SET `lasttime` = 1782762401 WHERE `id` = 502989 [ RunTime:0.006729s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000260s ]
  11. SELECT * FROM `article` WHERE `id` < 502989 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000456s ]
  12. SELECT * FROM `article` WHERE `id` > 502989 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.007558s ]
  13. SELECT * FROM `article` WHERE `id` < 502989 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000700s ]
  14. SELECT * FROM `article` WHERE `id` < 502989 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.004269s ]
  15. SELECT * FROM `article` WHERE `id` < 502989 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.015190s ]
0.106809s