6au1230-2aa01-0aa0接口模块
6au1230-2aa01-0aa0接口模块
6au1230-2aa01-0aa0接口模块
10KV箱式变电站投入运行,通过这么多年的投入运行经验来看,发现箱式变电站存在部分影响或稳定运行的因素,应及时解决。
(1)箱式变电站的10kV出线开关柜为带机械闭锁的全封闭开关柜,并都装有线路侧接地刀闸,在操作中,如合上接地刀闸时,无法对线路进行验电(电缆进出线:一端电缆头在站外钢管塔上,无法验电;另一端在开关柜内,开关柜为机械闭锁,在未合上接地刀闸前不能打开开关柜门,也无法验电)。如果在开关柜前面板上装设三相带电显示器,就可监测线路带电情况摘自:工变电器。
(2)箱式变电站的10kV开关柜内相对狭小,有检修、试验工作时需拆开开关柜后的箱板,一是固定螺栓较多,拆卸不方便,拆卸几次后有的螺栓会出现"滑丝"现象;二是开关柜的后箱板排列紧密,距离较近,容易误拆、误入。如果把箱后的箱板改为活动的箱门,加装与线路侧接地开关的闭锁,只有合上接地开关后,才能打开后箱门摘自:工变电器。
(3)在箱式变电站中,35kV和10kV变电箱体只有一扇门,通道没有第二出口,如有异常情况不利于人员撤离,应该在箱体现有门的对称侧再安装一扇门。
(4)箱式变电站为无人值守变电站,35kV、10kV变电箱为全密闭结构,箱中如有异常(箱内温度过高,火灾等),运行、监测人员不能够及时发现,会引起故障升级或损失加剧。可在箱内装设温度、光烟报警器,信号由扩频通道上传到调度监控机。
(5)35kV、10kV变电箱内结构紧凑,现场操作时,填写调度命令票和许可工作票时,没有办公地点,多在凸起的电缆沟盖板上填写。在箱内的通讯器材无处放置,电话多放在地面或操作机构上,箱内消防器材占用通道,影响正常操作维护。可在10kV变电箱内预留一个开关柜的位置,旋转办公桌椅、通讯器材、消防器材、备品备件等。
(6)35kV、10kV变电箱下电缆沟为半潜地下的封闭结构,因地下水位较高,电缆沟内长年积水,使变电箱内湿度增高,影响设备运行、降低绝缘强度、加快设备锈蚀。如果在封闭的电缆沟入口处设一集水坑,沟内纵向预留导水槽,就可将水引至集水坑,用水泵自动抽排。
(7)变电箱内照明、排风扇和事故照明线路全部是明线在箱顶或箱壁布线,既影响美观又不,可采用线槽布线或在箱体夹层中布线。
(8)35kV变电箱内操作走廊宽度为1.0m,10kV变电箱内操作走廊宽度为0.8m,并且有操作机构突出,实际空间只有0.6m,操作杆为活动拔插式,长度为0.5m,操作人员在拉合隔离开关时只有在操作杆旁侧进行操作,极为不便。可在设计箱式变电站时考虑加宽操作走廊。建议35kV变电箱内操作走廊宽度为1.5m,10kV变电箱内操作走廊宽度为1.2m。
1、倒闸操作填写操作票,且经主管部门负责人批准方可执行。
2、进行室内操作,应戴好绝缘手套站在绝缘垫(台或毯)上。
3、进行户外操作,应戴好绝缘手套、穿绝缘靴和使用的用具(如登电杆进行高空作业应戴帽和系带等)。
4、雨、雪、大雾天气在户外操作,应有特殊防护装置的高压绝缘棒和绝缘夹钳(如加有防雨罩),否则禁止使用,雷雨于气时禁止操作。
5、使用高压夹钳装卸高压熔断管时,应戴防护眼镜和绝缘手套,并站在绝缘垫上。
6、变配电设备停电后,即使是事故停电,在未拉开有关电源开关和采取措施以前,也不得触及设备或进入遮栏,以防突然来电发生事故。
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