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POWERSIL® N 553 DARKGREY

POWERSIL® N 553 DARKGREY is a one-component silicone dispersion that cures to a tough high voltage insulator coating with every good electrical properties.



特性

  • very good resistance to weathering
  • outstanding tracking resistance

POWERSIL® N 553 DARKGREY的特殊性能

  • 优异的疏水性
  • 即用型
  • 无需底涂即可附着于大部分基材

免责声明

所提供之所有信息均基于我们当前所掌握的知识。尽管如此,我们不对其作任何担保、也不承担任何责任,并且保留在任何时候进行技术变更的权利。购买方应在预测试中对所提供之信息以及产品在既定应用中的适应性进行检查。任何时候都必须以合同条款与条件为准。此外,本免责申明还适用于与第三方权利有关之事宜,尤其是在德国境外。

Protective silicone coating for porcelain, glass and epoxy insulators as well as for other high-voltage insulating equipment where surface contamination causes servise problems.

 

POWERSIL® N 553 DARKGREY forms a long-term hydrophobic surface. Thus it prevents the formation of wet conductive films and therefore the risk of pollution flashovers.

 

POWERSIL® N 553 DARKGREY contains ATH as filler.

Surface pretreatment

 

The insulator surface to be coated should be clean and free of dust and grease. For cleaning the following operations are suggested:

 

a) Proper cleaning by using water and a suitable detergent might be sufficient,

 

b) Insulators that show and adhering pollution, such like cement, other mineral or chemical pollution layers should be cleaned by either “cob corn-“or carbon dioxide blasting,

 

c) Any type of grease or fatty pollution is to be removed by using a suitable solvent like White Spirit or turpentine,

 

d) Residual contaminants should be removed by thoroughly wiping,

 

e) Finish the cleaning just before spraying POWERSIL® N 553 DARKGREY with Isopropanol or an equivalent alcohol.

 

Check carefully that there is no residue of dirt or grease left before spraying!

 

In most cases it is not necessary to apply a primer before coating.

 

Proper shaking of drum is mandatory before material is used.

 

Coating Application

 

POWERSIL® N 553 DARKGREY us preferably applied by spraying. It can be applied by brushing or dipping as well. For spraying application, the airless process was found to be efficient. The following equipment settings were found to be suitable:

 

  • Flat nozzle of 0.33 mm, 20°
  • Setting of pressure output 50 – 150 bar

 

The spray gun should be moved evenly across the surface at a distance of about 30 – 50cm. Due to the thixotropic properties of POWERSIL® N 553 DARKGREY it is usually possible to apply the first layer with a good cover. A second layer can be applied after approximately 10-20 minutes.

 

A typical dry film thickness is 0.4 mm to 0.5 mm. Thus, the theoretical consumption is 0.7 kg to 0.9 kg of POWERSIL® N 553 DARKGREY per square meter of insulator surface. Take losses for overspray and cleaning of the equipment into consideration.

 

Rain can damage the coating. In case of rain, please protect the job site or stop application.

 

Full cure is obtained in 8 – 12 hours after coating application depending on thickness, temperature and humidity.

 

Curing of the coating released by-products that lead to the formation of siloxanes. These may condensate at the surface, especially at low temperature and low ventilation rate. Therefore it is recommended to process the coating  at a temperature above 20°C at well ventilated conditions.

 

All spraying equipment should be cleaned with a nonpolar solvent (e. g. Xylene or White Spirit) immediately after use.

 

Maintenance

 

The product contains migratable matter that is able to encapsulate contaminants and to provide a hydrophobic surface. Coated insulators may appear dirty after some time in service. Nevertheless, washing and cleaning, especially with detergents and other chemicals is not recommended.In case of necessity of any cleaning, we recommend using POWERSIL®Shine.

 

 

 

 

Inspection

 

The water repellent appearance can be evaluated by spraying with water. IEC 62073, “Guidance on the measurement of wettability of insulator surfaces” provides further information. A partly lowering of the effect does not necessarily require immediate action. Experience shows that the remaining parts of the insulator will provide the necessary insulation ability.

 

Physical damage, such like scratching can be easily repaired by brushing of fresh coating after partly cleaning with White Spirit.

 

To allow an instant replacement of broken insulators it is recommendable to store a number of coated spare insulators. These should be stored in a protective covering

储存

The 'Best use before end' date of each batch is shown on the product label.

 

Storage beyond the date specified on the label does not necessarily mean that the product is no longer usable. In this case however, the properties required for the intended use must be checked for quality assurance reasons.

销售和支持

Wacker Chemicals (China) Co.,Ltd.
Caohejing Hi-Tech Park
200233 Shanghai
中国
+86  21  6130-2000 (电话)
+86 21 6130-2500  (传真)
Contact Sales
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