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中国人民电器万能断路器故障检查和解决方法

2020/5/15 15:06:09点击:
1、检查操作机构面板是否下沉,如下沉将影响传动机构的行程,最终影响到触头行程,使合闸不成功。调整时旋松面板固定螺丝,将面板上提,再拧紧固定螺丝。
  2、检查止动件位置是否正确及断路器是否在工作位置
  抽屉式断路器的导轨上有一止动件,当断路器不在工作位置或止动件的位置不正确时,止动件将顶住半轴外侧的塑料片,使半轴不能与跳扣扣住,发生一合即跳的故障。
  3、失压脱扣器
  失压脱扣器不在吸合位置时,压紧失压脱扣器动铁芯的金属片将在弹簧力的作用下使脱扣机构动作。对直流操作的断路器应首先检查滤波电容器,其次应检查失压脱扣器线圈是否开路,失压脱扣器顶部的金属片是否变形,金属片与顶杆的间隙是否在0.5~1 mm之间。如果滤波电容器损坏,应进行更换;失压脱扣器线圈开路,应进行维修或更换;对于弹簧片变形应予校正;对于间隙不当,应进行调整。
  4、分励脱扣器
  如分励脱扣器在吸合位置,同样会出现合闸后即跳闸的现象。对分励脱扣器,主要检查控制 回路分闸按钮的常开触点是否烧结在一起。另外分励脱扣器顶部的金属片变形,使金属片与顶杆之间的间隙过小,也有可能发生此类故障。分闸按钮损坏应更换,金属片变形应校正, 并调整金属片与顶杆之间的间隙在0.5~1mm之间。
  5、跳扣与半轴的位置不正确
  断路器在断开位置时,跳扣与半轴的距离应在0.8~1.0mm范围内,超出此范围,将不能保证 半轴与跳扣可靠地锁住,从而使断路器一合即跳。调节时,松开调节螺丝的并帽(锁紧螺母),将调节螺丝旋进或旋出,直至跳扣与半轴的距离在0.8~1mm之间。
  6、过流脱扣器
  检查过流脱扣器的传动杆能不能复位,储能杆能不能再扣。传动杆不能复位时,调节过流脱扣器的铁芯;储能杆不能再扣时,调节储能杆后面的开口片,储能杆头部与扣片的距离应控制在0.5~2mm范围内。
  7、自由脱扣器
  首先检查自由脱扣器的盖板是否变形,盖板变形将使安装半轴的两端轴套不同心,半轴不能自由转动;其次检查自由脱扣器机构中活节螺栓有效尺寸是否合适。盖板变形可拆下校正,有效尺寸不合适,需进行调整,调整时先取下盖板,再取下活节螺栓上端连接轴上的开口销,压出连接轴,旋转活节螺栓,调节到合闸时三个连接轴的中心正好处于自由脱扣机构盖板上三个圆孔的中心位置。