变压器油的试验项目和参数要求对照表<\/span><\/td><\/tr>序号<\/SUB><\/FONT><\/DIV><\/TD>项 目<\/SUB><\/FONT><\/DIV><\/TD>要 求<\/SUB><\/FONT><\/DIV><\/TD>说 明<\/SUB><\/FONT><\/DIV><\/TD><\/TR>投入运行前的油<\/SUB><\/FONT><\/DIV><\/TD>运 行 油<\/SUB><\/FONT><\/DIV><\/TD><\/TR>1<\/SUB><\/FONT><\/DIV><\/TD>外观<\/SUB><\/FONT><\/DIV><\/TD>透明、无杂质或悬浮物<\/SUB><\/FONT><\/DIV><\/TD> 将油样注入试管中冷却至5℃在光线充足的地方观察<\/SUB><\/FONT><\/DIV><\/TD><\/TR>2<\/SUB><\/FONT><\/DIV><\/TD>水溶性酸pH值<\/SUB><\/FONT><\/DIV><\/TD>≥5.4<\/SUB><\/FONT><\/DIV><\/TD>≥4.2<\/FONT><\/DIV><\/SUB><\/FONT> <\/DIV><\/TD> 按GB7598进行试验<\/SUB><\/FONT><\/DIV><\/TD><\/TR>3<\/SUB><\/FONT><\/DIV><\/TD>酸值<\/FONT><\/DIV>mgKOH\/g<\/SUB><\/FONT><\/DIV><\/TD>≤0.03<\/SUB><\/FONT><\/DIV><\/TD>≤0.1<\/SUB><\/FONT><\/DIV><\/TD> 按GB264或GB7599进行试验<\/SUB><\/FONT><\/DIV><\/TD><\/TR>4<\/SUB><\/FONT><\/DIV><\/TD>闪点(闭口)<\/FONT><\/DIV>℃<\/SUB><\/FONT><\/DIV><\/TD>≥140(10号、25号油)<\/FONT><\/DIV>≥135(45号油)<\/SUB><\/FONT><\/DIV><\/TD>1)不应比左栏要求低5℃<\/FONT><\/DIV>2)不应比上次测定值低5℃<\/SUB><\/FONT><\/DIV><\/TD> 按GB261进行试验<\/SUB><\/FONT><\/DIV><\/TD><\/TR>5<\/SUB><\/FONT><\/DIV><\/TD>水分mg\/L<\/SUB><\/FONT><\/DIV><\/TD>66~110kV ≤20<\/FONT><\/DIV>220kV ≤15<\/FONT><\/DIV>330~500kV ≤10<\/SUB><\/FONT><\/DIV><\/TD>66~110kV ≤35<\/FONT><\/DIV>220kV ≤25<\/FONT><\/DIV>330~500kV ≤15<\/SUB><\/FONT><\/DIV><\/TD> 运行中设备,测量时应注意温度的影响,尽量在顶层油温高于50℃时采样,按GB7600或GB7601进行试验<\/FONT><\/DIV><\/SUB><\/FONT> <\/DIV><\/TD><\/TR>6<\/SUB><\/FONT><\/DIV><\/TD>击穿电压<\/FONT><\/DIV>kV<\/SUB><\/FONT><\/DIV><\/TD>15kV以下 ≥30<\/FONT><\/DIV>15~35kV ≥35<\/FONT><\/DIV>66~220kV ≥40<\/FONT><\/DIV>330kV ≥50<\/FONT><\/DIV>500kV ≥60<\/SUB><\/FONT><\/DIV><\/TD>15kV以下 ≥25<\/FONT><\/DIV>15~35kV ≥30<\/FONT><\/DIV>66~220kV ≥35<\/FONT><\/DIV>330kV ≥45<\/FONT><\/DIV>500kV ≥50<\/SUB><\/FONT><\/DIV><\/TD> 按GB\/T507和DL\/T429.9方法进行试验<\/SUB><\/FONT><\/DIV><\/TD><\/TR>7<\/SUB><\/FONT><\/DIV><\/TD>界面张力(25℃) mN\/m<\/SUB><\/FONT><\/DIV><\/TD>≥35<\/SUB><\/FONT><\/DIV><\/TD>≥19<\/SUB><\/FONT><\/DIV><\/TD> 按GB\/T6541进行试验<\/SUB><\/FONT><\/DIV><\/TD><\/TR>8<\/SUB><\/FONT><\/DIV><\/TD>tgδ(90℃)<\/FONT><\/DIV>%<\/SUB><\/FONT><\/DIV><\/TD>330kV及以下≤1<\/FONT><\/DIV>500kV ≤0.7<\/SUB><\/FONT><\/DIV><\/TD>300kV及以下≤4<\/FONT><\/DIV>500kV ≤2<\/SUB><\/FONT><\/DIV><\/TD> 按GB5654进行试验<\/SUB><\/FONT><\/DIV><\/TD><\/TR>9<\/SUB><\/FONT><\/DIV><\/TD>体积电阻率(90℃)<\/FONT><\/DIV>Ω·m<\/SUB><\/FONT><\/DIV><\/TD> | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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