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大量供应光伏板黄绿BVR2.5接地线
家用电器设备由于绝缘性能不好或使用环境潮湿,会导致其外壳带有一定静电,严重时会发生触电事故。为了避免出现的事故可在电器的金属外壳上面连接一根电线,将电线的另一端接入大地,一旦电器发生漏电时接地线会把静电带入到大地释放掉。另外对于电器维修人员在使用电烙铁焊接电路时,有时会因为电烙铁带电而击穿损坏电器中的集成电路,这一点比较重要。使用电脑的朋友有时也会忽略主机壳接地,其实给电脑主机壳接根地线,在一定程度上可以防止死机现象的出现。在电力系统中接地线:是为了在已停电的设备和线路上意外地出现电压时保证工作人员的重要工具。按部颁规定,接地线必须是以上裸铜软线制成电器中,接地线就是接在电气设备外壳等部位及时的将因各种原因产生的不安全的电荷或者漏电电流导出的线路。
公司配备了高压局放检测装备,拉力试验机,低温弯曲试验机,燃烧试验仪,绝缘电阻测试仪,电子分析天平,故障定位仪等全套检测设备,对出厂产品严格测试,我公司生产的光伏接地线,产品型号齐全,质量保证!采用BVR黄绿双色线制作,发货快 价格优,本厂接地线全部为国标线,默认孔径5MM,可定制任意孔径和长度,请用户放心订购.我厂自己生产的BVR黄绿双色线,全部按GB生产。
挂接地线前必须先验电,未验电挂接地线是基层中较普遍的习惯性违章行为,在悬挂时接地线道体不能和身体接触。
使用携带型短路接地线前,应先验电确认已停电,在设备上确认无电压后进行。先将接地线夹连接在接地网或扁铁件上,然后用接地操作棒分别将导线端线类拧紧在设备导线上。拆除短路接地线时,顺序正好与上述相反。
土壤电阻率是单位长度土壤电阻的平均值,单位是欧姆?米。土壤电阻率的大小主要取决于土壤中导电离子的浓度、土壤含水量和土质颗粒的大小,
现今,随着光伏发电技术的日趋成熟和大量已建成光伏电站的运营,系统安全性已经成为了保障日常生产的重要因素。以往许多人们对于“小容量”光伏电站的接地、防雷问题并不重视,但随着太阳能电池板功率和电站系统容量的增大,近年来由于接地不良造成的人身触电伤亡事件已为数不少。本文将列举在建设过程中可能会遇到的接地施工问题并浅析接地技术。
r several months again the Court was a hot-bed of intrigue, in which Norfolk, Sus, and the Conservative party, aided by Guzman, and cautiously supported by Cecil and Bacon, were pitted against Leicester and the French ambassador. From day to day the fickle Queen changed. First Sus was to be hurried off at once, then he was to go after Shrovetide; then when he had prepared for his journey Elizabeth told him he would not lee so quickly as he thought. With Leicester, too, she was equally changeable, one day turning her back upon him, and the next begging the Spanish ambassador to be friendly with him. On one occasion in February, 1567, when the Council had progressed very far in the settlement of Sus’s instructions, Leicester’s Purita
现场工作不得少挂接地线或者擅自变更挂接地线地点。
悬挂点如有接地点,应用接地线夹或专用铜棒作接地连接;如无固定接地点可利用;则可用临时接地点,接地极埋入地下深度应不小于0.6m。
高压短路接地线对地电阻要求决定了接地线的品质,一般按照电力行业DL-T879-2004技术规定要求每个截面积的接地线对地电阻不的大于下列数值:接线鼻之间测量直流电阻,对于16mm2 ,25mm2,35mm2,50mm2,70mm2,95mm2,120mm2的各种截面,平均每米的电阻值应分别小于1.24mΩ, 0.79mΩ,0.56mΩ,0.40mΩ,0.28mΩ,0.21mΩ,0.16mΩ[1] 。
通过在青海等地进行光伏电站EPC总承包和调研工作,发现在建设过程中接地系统常见的施工问题如下: (1)接地引下线和避雷带焊接长度不够(圆钢不应小于六倍直径,扁钢不小于两倍宽度);焊接不合格,焊接处有焊瘤、气孔和夹渣;未敲除焊渣。 (2)接地引下线、避雷带变形,脱离支架。 (3)用结构金属材料代替避雷针及接地引下线,镀锌焊接后未刷防腐漆。 (4)接地体引下线未做防腐处理。 (5)接地线穿墙时未加设保护套管。 (6)屋内电气设备外壳未与接地系统连接。 (7)电气设备接地线未与地网连接。 (8)接地体、地网安装敷设过浅(不应小于0.8米;若有冻土层,则应敷设在冻土层以下)。
ubject. “I saw she was pleased, as she no dou thought that if the Archduke heard any of the idle tales they tell about her (and they tell many) he might take advantage of them to the detriment of her honour if the match were broken off, although, from this point of view, I was not sorry, as the fear may not be without advantage to us.” But to the Queen he expressed himself shocked that she should think of such a thing as he had done previously when Lady Sidney had hinted at a similar dou. For the next two months an elaborate attempt was made to keep up the appearance of cordiality towards the Archduke’s match, and the Spanish party was still further beguiled by the sudden tendency of the Queen to ile on Catholici. Candles and crucifixes were placed on the altar in the Chapel Royal, and the Queen entertained the Bishop
使用接地短路接地通知:(1)完成测试类型后一般短路接地被短路应该废弃处理。(2)携带型短路接地应该选择能够承受最大的吊电气短路电压、额定短路电压值不得小于最大故障电压的电,当没有删除暂停处重合,也应该考虑二次短路电压在短路电压冲击的影响短路接地额定短路电压值。
防雷接地 :光伏电站由于占地面积相对较大,周围地势多相对平缓且厂区内无高大建筑,其防雷措施主要为: (1)加设避雷针以防止直击雷并满足保护半径,高度多在20-35米。但为了保证光伏电池组件的运行安全和效率,应避免对组件造成遮挡阴影。 (2)光伏组件支架可靠接地。 (3)汇流箱进出端口处加设避雷器。