Anti-pollution Flashover Coatings
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    The scope of application: This product is widely used for the outside insulated equipment in 10kV-500kV high voltage transmission and transformation systems of electric power (line insulators, insulating sleeves, post insulators, current and voltage transformers, etc).
     It can also be used for the outside insulation of electric equipment in special environment. The function and feature: On the basis of the comprehensive performance of RTV coat layer, it is updated further, longer than RTV in the service life. High hydrophobicity Excellent anti-corrosion performance Special surface performance Special non-stick pollution performance Excellent physical and mechanical property Resistance to heat and cold Non-inflammable, non-explosive and non-poisonous
     The method of use: The product can be used by spraying, also brushing. Regular cleaning, decontaminating, deoiling and degreasing should be carried out on the porcelain surface before painting in order to keep clean. After opening the container of the product, it is be sprayed repeatedly by painting equipment on the clean porcelain surface, ensuring the thickness of over 0.4mm. The coating can cure spontaneously into film in the air. The remaining coating should be sealed well for using again. Notes: 1. This product gets cured in the air. Take care of the seal and preservation. Take care of the anti-fire in the transport and construction. 2. Shake it well before use. 3. It is used when it is fine. The coat layer should be even. 4. It is transported according to the marks on the packing box under the dry, cool, safe and dark conditions. 5. Take care of the environment protection. Do not dump and discard this product and its package. Applicable standards: DL/627-2004《Normal temperature curable silicone rubber anti-pollution flashover coating for insulator》; The enterprise standard of North China Grid Co., Ltd; The enterprise standard of Liaoning Hualong Electric Power Technology Co., Ltd

主要技术性能指标

序号

项目

性能

DT/T 627-1997标准

T-1

B-1

B-2

H-1

1

外观检查

无明显机械杂质,无絮状沉淀,固化后应平整光滑无气泡

透明
粘稠液体

白色
粘稠液体

白色
粘稠液体

红色
粘稠液体

2

固体含量检查(%)

≥22

53.75

57.73

50.81

56.39

3

粘度试验(S)

15-60

20

32

27

28

4

表面电阻率试验(Ω)

≥1╳1012

3.26╳1016

0.49╳1015

5.7╳1015

1.71╳1016

体积电阻率试验(Ω.m)

≥1╳1014

3.73╳1016

3.70╳1015

1.24╳1015

2.01╳1016

5

相对介电常数试验

ε≤3.0

2.76

2.55

2.56

2.56

介损正切值试验(%)

tg≤0.3

0.183

0.193

0.263

0.257

6

击穿场强试验(MV/m)

≥15

27.1

24.8

25.1

26.1

最大偏差(%)

<5

2.9

2.4

2.4

3.8

7

耐漏电起痕及电蚀损性试验

≥TMA2.5级

 

1A2.5级

1A2.5级

1A2.5级

8

附着力试验

不低于2级

1级(画圈法)

1级(画圈法)

1级(画圈法)

1级(画圈法)

9

耐磨性试验(g)

≤0.05

0.0330

0.0302

0.0145

0.0190

10

吸水率试验(%)

≤0.25

0.187

0.207

0.083

0.167

11

憎水性丧失和恢复试验
(迁移前憎水角)

>90º

100.7º

105.7º

103.0º

103.3º

带污层的憎水性恢复试验
(迁移后憎水角)

>90º

129.7º

134.3º

134.0º

129.7º

12

耐腐蚀试验

酸、碱、盐和变压器油作用下无起皱、脱落、起泡、变色等

合格

合格

合格

合格

13

工频干闪电压试验
(有涂料/无涂料)

有涂料绝缘子相对无涂料绝缘子不得降低

105.3/104.7

106.7/104.7

108.0/104.7

109.7/104.7

工频湿闪电压试验
(有涂料/无涂料)

69.9/57.6

67.9/57.6

66.8/57.6

69.4/57.6

14

耐污闪试验(盐密0.1mg/cm2、灰密1.0mg/cm2)

U1(有涂层)/U2(无涂层)≥1.5

2.02

2.`12

2.12

2.13

耐污闪试验(盐密0.4mg/cm2、灰密1.0mg/cm2)

U1(有涂层)/U2(无涂层)≥1.5

2.31

2.43

2.56

2.6

15

耐温变性试验

耐5次温度循环(-40-80 ℃,2.5h)试验而不损坏,附着力不大于2级

1级

1级

1级

1级

16

硫化时间试验

表干(手感法)≤30min

15min

23min

20min

23min

表干(小球法)≤30min

19min

28min

23min

26min

固化时间≤7天(168h)

8h

14h

11h

13h

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