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1、高压开关柜的维护1、高压开关柜是一种组合式电器,它可以集断路器、负荷开关、接触 器、隔离开关、熔断器、互感器、避雷器、电容器、母线以及相应的测 量装置、信号装置、连锁装置和通信系统等电气设备于一个长方柜的金 属外壳内。高压开关柜主要劣化因素由于各种缘由,运行中的高压开关 柜会随着时间的推移发生劣化,并且时时影响着电网的安全。主要劣化 因素有:(1)热劣化。由于设备运行中的温度升高导致绝缘性能下降。2电劣化。绝缘材料的电场集中处会导致绝缘性能下降。(3机械 劣化。机械应力导致的零件损坏、变形、龟裂和磨损等。4)环境劣 化。由环境因素引起的污损、腐蚀、吸湿和润滑油变质劣化等。运行维 护留意事项由于
2、开关柜2、是一种应用范围广泛的电力设备,并且单因素劣化较少,多是综合 因素劣化,是事故的多发区。因此,运行人员应重点留意四点:1) 配电间应防潮、防尘、防止小动物钻入。(2全部金属部件应防锈蚀涂上清漆或色漆,运动部件应留意润滑,检查螺钉有否松动,积灰 需准时去除。(3)留意观看各元件的状态,检查是否有过热变色、异 样响声、接触不良等现象。(4)开关柜长期未投入运行时,投运前主 要一次元件间隔(如手车室及电缆室)应进行加热除湿,以防止产生凝 露而影响设备的外绝缘。【链接】常用高压开关柜的类型通用型高压开 关柜内的主要电气设备是高压断路器,依据断路器的安装方式分为:(1) 固定式。高压断路器安Gx
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