国家电网企业标准Q／GDW-634-2011《电力复合脂技术条件》及编制说明-20110921

ICS29.2402929.020CEC96-2008国家电网公司企业标准Q/GDW634—2011电力复合脂技术条件Technicalspecificationsforelectricaljointcompound2011-09-02发布2011-09-02实施国家电网公司发布Q/GDW2Q/GDW634—2011I目次前言·····························································································································Ⅱ1范围··························································································································12规范性引用文件···········································································································13术语和定义·················································································································14技术要求····················································································································25试验方法····················································································································36检验规则····················································································································57标志、包装、运输、贮存·······························································································7附录A（规范性附录）酸碱反应的测定················································································8附录B（规范性附录）试验连接件尺寸及连接方法·································································9附录C（规范性附录）电力复合脂涂敷方法········································································10附录D（规范性附录）钢制螺栓的紧固力矩值·····································································11附录E（规范性附录）加速稳定性试验方法·········································································12编制说明·······················································································································13Q/GDW634—20110II前言本标准参照有关电力化工产品的国家标准及行业标准制定。本标准规定了电力复合脂的技术要求项目、试验方法、检测规则等内容，作为电力复合脂组织生产和检验产品的依据。本标准由国家电网公司基建部提出并解释。本标准由国家电网公司科技部归口。本标准主要起草单位：中国电力科学研究院。本标准主要起草人：王国刚、强春媚、苗文华、刘振强、裴志伟。2Q/GDW634—20111电力复合脂技术条件1范围本标准规定了电力复合脂（俗称导电膏）的术语和定义、技术要求、试验方法、检验规则、标志、包装、贮存、运输。本标准所规定的产品适用于高低压电力设备带电金属导体连接处，具有降阻、抗氧化、抗腐蚀等作用。2规范性引用文件下列文件对于本标准的应用是必不可少的。凡是注日期的引用文件，仅所注日期的版本适用于本标准。凡是不注日期的引用文件，其最新版本（包括所有的修改单）适用于本标准。GB/T269润滑脂和石油脂锥入度测定法GB/T763交流高压电器在长期工作时的发热GB/T1497低压电器基本标准GB/T1692硫化橡胶绝缘电阻率测定GB/T2423.1电工电子产品基本环境试验规程试验A：低温试验方法GB/T2423.2电工电子产品环境试验第2部分：试验方法试验B：高温GB/T2423.4电工电子产品基本环境试验规程试验Db：交变湿热试验方法GB/T2423.17电工电子产品基本环境试验规程试验Ka：盐雾试验方法GB/T2423.22电电工电子产品环境试验第2部分：试验方法试验N：温度变化GB/T2829周期检查计数抽样程序及抽样表（适用于生产过程稳定性的检查）GB/T3498润滑脂宽温度范围滴点测定法GB/T4929润滑脂滴点测定法GB/T5273变压器、高压电器和套管的接线端子GB/T5585电工用铜、铝及其合金母线GB/T7325润滑脂和润滑油蒸发损失测定法GB/T13264不合格晶率的小批计数抽样检查程序及抽样表GB/T50233110～500kV架空送电线路施工及验收规范GB/T50389750kV架空送电线路施工及验收规范GB/T50545110kV～750kV架空输电线路设计规范GBJ149E电气装置安装工程母线装置施工及验收规范（英文版）SH/T0229固体和半固体石油产品取样法SH/T0331润滑脂腐蚀试验法SH/T0337润滑脂蒸发度测定法SH/T0452润滑脂贮存安定性试验法3术语和定义下列术语和定义适用于本标准。3.1电力复合脂electricaljointcompound(conductivepaste)Q/GDW634—201102改善带电金属导体接触性能的复合膏体，俗称导电膏。3.2接触电阻contactresistance两种金属导体互相接触时，在接触区域内存在的附加电阻，由收缩电阻和膜电阻组成。3.3接触电阻稳定系数contactresistancestabilizingcoefficient带电金属导体接触处经有载冷热循环操作后，最终接触电阻值与初始接触电阻值之比。3.4冷态接触电阻coolcontactresistance带电金属导体接触处在室温下所测的接触电阻值。3.5锥入度（针入度）conepenetration在规定的质量、时间和温度条件下，标准锥体沉入电力复合脂试样的深度，其单位为1/10mm。3.6滴点（滴落点）droppingpoint在规定的加热条件下，电力复合脂从滴点测定器的脂杯中滴落第一滴并达到试管底部时的温度。3.7蒸发损失evaporationloss在规定温度的恒温浴中，热空气通过电力复合脂表面一定时间，试样的失重。3.8贮存安定性storagestability在规定温度下，电力复合脂贮存一定时间的安定性。4技术要求技术要求见表。表1技术要求序号测试项目质量指标Ⅰ型Ⅱ型1外观均匀油膏，无明显颗粒状杂质2锥入度（25℃、150g）1/10㎜200～3153滴点℃≧200≧2204pH值6～85腐蚀（铜片、铝片、1003h℃）试品无斑点和明显不均匀颜色变化；复合脂无胶皮状及硬膜6蒸发损失（99℃、22h）％≦1.57涂膏前后冷态接触电阻的变化X0.90.958接触电阻稳定系数K≦1.59耐潮性能≦K1.310低温性能（-40℃、2h）无龟裂11温度循环性能﹣40～70℃，K≦1.5﹣40～85℃，K≦1.52Q/GDW634—20113表2（续）序号测试项目质量指标Ⅰ型Ⅱ型12体积电阻率（20℃、Ω•㎝）≧10813额定电流下的温升（空气中，K）≦6514耐盐雾腐蚀的性能金属导体接触面无腐蚀；K≦1.5金属导体接触面无腐蚀；≦K1.315贮存安定性（38±3℃，6个月）锥入度变化，外观30，无油份析出16加速稳定性（20±5℃）目测有无析出、分层、挂壁现象注：Ⅰ型——用于铜-铜金属导体连接外的其他连接，如铜-铝、铝-铝、铝-镀锌金属导体连接；Ⅱ型——用于铜-铜金属导体连接。5试验方法5.1外观检查用刮刀把复合脂涂在干净的玻璃板上，厚1mm～2mm，对光观察，复合脂应均匀一致。5.2锥入度的测定按GB/T269的规定测定不工作锥入度。在25℃时，将全尺寸锥体和锥杆组合件（锥体总质量为102.50士0.05g，锥杆质量为47.50士0.05g）从锥入度计上释放，使锥体下落5s，并测定其刺入深度。对样品总共进行三次测定，并记录测定数值。5.3滴点的测定按GB/T4929或GB/T3498的规定进行。将电力复合脂样品装入滴点测量仪的脂杯中，在规定的标准条件下，加热样品，测定样品在试验过程中滴落第一滴并到达试管底部时的温度。对滴点大于260℃的样品，应按GB/T3498的规定进行，试验在铝块炉中进行。5.4pH值的测定按附录A的规定进行。5.5腐蚀试验按SH/T0331的规定进行。将经过打磨、清洗的铜试片和铝试片，浸入电力复合脂样品中，在100℃经过3h后，观察试片表面发生的颜色变化，并查看复合脂有无胶皮状及硬膜。5.6蒸发损失的测定按GB/T7325的规定进行。将电力复合脂样品置入专用的蒸发器里，在99℃的恒温浴中，热空气通过试样表面22h。根据试样失重计算蒸发损失。试样的蒸发损失以X（wt％）表示，按下式计算：100SWXS-=×式中X——试样的蒸发损失，％；S——试验前试样质量，g；Q/GDW634—201104W——试验后试样的质量，g。5.7冷态接触电阻值的测定图1接触电阻测量示意图冷态接触电阻的测量如图1所示，电力复合脂的涂敷方法按附录C进行，两板间的螺栓紧固力矩值应符合附录D，在a、b两点测出接触电阻，接触电阻用数字微欧计进行测量，测量点保持一致。冷态接触电阻变化系数X按下式计算：21jjRXR=式中R1j——为涂膏前的冷态接触电阻；R2j——为涂膏后的冷态接触电阻。5.8接触电阻稳定系数K的测定对按使用条件规定连接的铜-铜、铝-铝、铜-铝母排等经有载冷热循环操作后，用5.7的方法测出初始接触电阻R1与最终接触电阻R2，其比值K（K=R2/R1）应符合表的要求。5.9耐潮性试验按GB/T2423.4的规定进行。对按使用条件规定连接的铜-铜、铝-铝、铜-铝母排等涂敷电力复合脂样品，进行温度为﹢40℃（饱和湿度）、6周期的交变湿热试验，考察试验前连接母排的接触电阻值R1与试验后的接触电阻值R2，并计算接触电阻变化系数K。5.10低温试验按GB/T2423.1试验A的规定进行。将电力复合脂涂敷在100mm×50mm的洁净铜板上，涂层厚约0.2mm，试件为三件，试验时温度为-40±3℃℃，持续时间为2h。5.11温度循环试验按GB/T2423.22中方法Nb的规定进行。低温值TA、高温值TB的选取参考GB/T2423.1及GB/T2423.2。对按使用条件规定连接的铜-铜、铝-铝、铜-铝母排等涂敷电力复合脂样品，进行温度循环试验，对于Ⅰ型样品，试验条件为：TA=﹣40℃，TB=70℃，温度保持时间