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GW4A型220千伏隔离刀闸是采用双柱水平旋转式结构

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其三个系统作为隔离和切换三相线路

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进出线位于两端

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其明显断开点和接地系统

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确保了电路的安全连接和断开

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主要由底架、支柱绝缘子及导电系统等三部分组成

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采用三级一体式同步操作结构

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使得它采用单头接地系统

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也可升级为双接地系统

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其操作系统是将电能转换成机械能

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通过机械连杆将机械能传递到执行机构

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我们假设现在线路已接通

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电机运转

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经涡轮减速机带动数轴旋转

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两个平行杆运动

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分别带动各自的旋转瓷瓶旋转

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两触头向相反方向运动

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直到平行结束

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当线路需要检修时

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我们可利用接地系统

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将线路做可靠接地

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接地系统中操作机构的电机旋转

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带动涡轮减速机减速

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经连杆到达执行机构

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动触头做切线运动

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和接地静触头插接

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实现明显可靠接地

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可对线路实现冷储备和检修操作提供安全保证

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投入线路时

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需先将接地刀闸分闸

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然后才能进行隔离刀闸合闸

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合闸时

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只需将电机反转

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通过连杆联动

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带动瓷瓶和动触头合拢

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触头是靠自身弹簧刀闸能量自行夹紧

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避免了目前主流因弹簧加紧中的弹簧锈蚀、

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发热退火而引起的触头夹紧力降低

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接触电阻增加 触头发热加剧的恶性循环故障

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其简单的机械结构和可靠的性能

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广泛应用于110到330千伏电力系统

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适用于变电站、发电厂等户外场所