PRTV Anti-flashover Insulator Coating

Specifications This coating is widely used in power industries to coat insulators to prevent flashover,arcing under highly pulluted environment

PRTV Silicone Coating For High Voltage Insulators
Outward appearance				Does not have the obvious mechanical
				impurity and the cotton wool shape.
				The coating is level,smooth and has
				no air bubble.
Viscosity  s				100~200
Dielectirc strength  kV/mm				25
Surface resistivity Ω·m				1x1012
Volume resistivity Ω·m				1x1014
Relative permittivity dielectric				3.0
lose tangent value				0.3%
Arc resistance  s				180
Electricity wear and			AC Alternating current	TMA 4.5
tear leaks			DC Direct current	TMA 3.5
Adhesion ability			Cementation shearing	3.0
			strength Mpa
			Cycling method level	No less 2 level
Abrasion resistance  g				0.05
Ratio of water absorption   %				0.25
Hydrophobicity			Hydrophobic and level	Qav≥1000 Qmin≥900 HC1~2
			Lose property 96h	Qav≥900 Qmin≥850 HC3~4
			Recovery characteristic	t≤24h
			Water repellency	Qav≥1100 Qmin≥100 HC2~3
			charateristic 96h
Erosion resistance test			Acid,alkali and salt,	Does not have the corrugation, falls
			8024h	off,bubbles,changes color and so on.
				The adhesion is not lower than 2 levels.
			transformer oil 10524h	Does not have the corrugation, falls
				off,bubbles,changes color and so on.
				The adhesion is not lower than 2 levels.
Flashover resistance test				U1(with paint-coat)/U2(with no paint
				-coat)≥2.0
Heat resistant denaturation				The coating is not damaged.The adhesion
experiment-40~+80,				inspection is not lower than 2 levels.
2.5h×5 times