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为了使主断路器处于良好的工作状态，必须加强维护管理。  
1. 保持空气潮湿或不洁，管道不干净，都可能造成一下后果：  
（1） 潮湿气体在电弧作用下分解成氢、氧等混合气体，破坏主触头分断后断口间的绝缘，是电弧困难或电弧重燃，严重时会造成灭弧室炸裂。  
（2） 使支持瓷瓶和灭弧室内腔绝缘强度降低，造成沿面放电。  
（3） 管道中的漆皮、锈渣等异物可能堵塞气口，使主断路器动作失灵，发生卡位现象。  
（4） 异物若进入灭弧室，可能会造成主触头接触不良，使非线性电阻因长期通电而烧损，严重时会造成非线性电阻瓷瓶炸裂。  
因此，在主断路器储风缸的进气管上装有油水分离器，下部有放水阀，使用维护时应定期排水以保持气路洁净。  
2．定期更换橡胶件  
主断路器是一种结构复杂的气动电气，各部件对密封性能要求较高，为保证良好的密封性能，应定期更换橡胶件。  
3．定期检查各主要部件  
应定期检查各主要部件保持良好的技术状态。  
（1）灭弧室  
定期检测主触头超程和动触头复原弹簧的状态，动、静触头由于分、合频繁，会因相互摩擦而磨损，从而造成超程减小，接触压力减小。当超程减小到一定程度时，要更换动、静触头。动触头复原弹簧变形超过一定限度时，必须及时更换。  
（2）非线性电阻  
保持非线性电阻瓷瓶内控清洁，密封良好，定期更换非线性电阻瓷瓶中的干燥剂。检测非线性电阻片的阻值，阻值变化超过一定限度时，必须及时更换。  
（3）主阀  
定期检查活塞与阀体间的配合尺寸，尺寸不符合要求应及时更换。  
（4）传动风缸  
适当调节传动风缸的缓冲，保证隔离开关动作良好。定期检查活塞与缸体之间的配合精度，通过修整或更换零部件，保证其良好的动作性能。  
（5）通风塞门  
必须定期更换塞门中的填料，检测塞门的通风量，将其调整至允许范围之内。  

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