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开关柜“五防”闭锁装置维护与检修.ppt

  • 2026-04-04 11:36:48
开关柜“五防”闭锁装置维护与检修.ppt
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开关柜

又称成套开关或成套配电装置

它是以断路器为主的电气设备

是指生产厂家根据电气一次主接线图的要求,将有关的高低压电器(包括控制电器、保护电器、测量电器)以及母线、载流导体、绝缘子等装配在封闭的或敞开的金属柜体内,作为电力系统中接受和分配电能的装置。

既可根据电网运行需要将一部分电力设备或线路投入或退出运行,也可在电力设备或线路发生故障时将故障部分从电网中快速切除,从而保证电网中无故障部分的正常运行,以及设备和运行维修人员的安全。

高压开关柜的闭锁功能

(1)防误分、合开关。这一点,机械上没有什么,主要用电磁防误锁实现。

此外,还有一种闭锁,是放在分段开关与分段刀闸手车之间的机械闭锁,也有通过电气回路相互闭锁的。当分段刀闸手车在试验位置时,能通过一位置辅助开关接点,串入分段开关合闸回路,使分段开关合闸回路不通,无法合闸。

当分段开关在合闸位置时,分段刀闸手车有一电磁锁卡住,无法摇出到试验位置。分段开关辅助接点串入电磁锁回路,使电磁铁失电,达到闭锁作用。

(2)防止带负荷操作隔离开关。

断路器处于合闸状态时,手车不能推入或拉出,只有当手车上的断路器处于分闸位置时,手车才能从试验位置移向工作位置,反之也一样。

(3)防止带电合接地开关。

只有当断路器手车在试验位置及线路无电时,接地开关才能合闸。

采用机械强制联锁。断路器手车处于试验位置时,接地开关操作孔上的滑板应能按动自如,同时导轨上的挡板和导轨下的挡块应随滑板灵活运动;手车处于工作位置或工作与试验中间位置时,滑板应无法按下。

(4)防止接地开关合上时送电。

接地开关位于合闸位置时,由于操作接地开关时按下了滑板,其传动机构带动柜内手车右导轨上的挡板顶住了手车的传动丝杆联锁机构,使手车无法移动;因而实现接地开关合闸时无法将手车移入工作位置的联锁功能。

(5)防止误入带电间隔。

断路器手车拉出后,手车室活门自动关上,隔离高压带电部分。

实现接地开关与电缆室门板的机械联锁。在线路侧无电且手车处于试验位置时合上接地开关,门板上的挂钩解锁,此时可打开电缆室门板。

防止触电危害

(1)应有两人进行,一人操作,一人监护。

(2)手车柜在手车拉出后,插孔应有防护隔板可靠隔离。

(3)将其它运行中的设备门锁死并在相邻间隔悬挂“止步,高压危险”标示牌,在检修间隔悬挂在此工作标示牌。

(4)使用电气工具,其外壳要可靠接地;施工电源绝缘良好,按规定串接漏电保护装置。

(5)对于施工电源、直流操作、合闸电源应有防止触电的措施。

防止机械伤害

(1)事前把所有的储能部件能量释放掉。

(2)进行参数测试调整时,严禁将手、脚踩放在断路器的传动部分和框架上。

(3)各小室工作完毕后,应随时关闭小室门。

人员碰伤

(1)工作中必须戴安全帽。

(2)工作负责人(监护人)随时提醒作业人员可能碰到的地方。

(3)各小室工作完毕后,应随时关闭小室门。

每天保证更新30+优质资源,为您提供2026电力领域的电力电气、继电保护及二次回路、电气试验、光储充微电网、风力发电、输配电工程、源网荷储、新型电力系统、虚拟电厂、现货与绿电交易、施工方案等

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  1. CONNECT:[ UseTime:0.000387s ] mysql:host=127.0.0.1;port=3306;dbname=h_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000757s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000302s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000285s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000581s ]
  6. SELECT * FROM `set` [ RunTime:0.000204s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000624s ]
  8. SELECT * FROM `article` WHERE `id` = 495455 LIMIT 1 [ RunTime:0.001542s ]
  9. UPDATE `article` SET `lasttime` = 1775309828 WHERE `id` = 495455 [ RunTime:0.001238s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000243s ]
  11. SELECT * FROM `article` WHERE `id` < 495455 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000413s ]
  12. SELECT * FROM `article` WHERE `id` > 495455 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000377s ]
  13. SELECT * FROM `article` WHERE `id` < 495455 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000651s ]
  14. SELECT * FROM `article` WHERE `id` < 495455 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001226s ]
  15. SELECT * FROM `article` WHERE `id` < 495455 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000677s ]
0.077124s