Superior in Electrical InsulationTesting Electrical Insulation

The importance of an electrical insulation material in solar panels is to ensure the overall safety and performance for the life of the panel. The high dielectric performance found in Protekt® HD provides solar panels with insulation against electro-degradation, while increasing bond strength to provide maximum power, flame and weather resistance.

Dielectric Strength

The test measures the electrical strength of a material as an insulator. The dielectric strength of a material is determined by the level of voltage needed to break through the insulating material. This is the maximum AC voltage per unit thickness that the material can handle before breakdown occurs. Note that the higher the dielectric strength of a material, the better its quality as an insulator.

Protekt® HD – DS Rating: 72

Partial Discharge

This is the localized dielectric breakdown of a small portion of the electrical insulation system. Each discrete partial discharge is the result of an electrical breakdown within the insulation. These discharges erode insulation and eventually result in insulation failure.

Testing on Protekt® HD was performed by TUV in compliance with IEC 61730-2, 60664-1: maximum system voltage of 1000VDC

Volume Resistivity

Volume resistivity is the resistance to leak current through the body of an insulating material. With a low electrical resistance, electrons flow easily across the surface or through the bulk of these materials. Charges go to ground or to another conductive object that the material contacts or comes close to.

Protekt® HD Ranking: Volume Resistivity (10x ohm-cm):18

Comparative Tracking Index

Tracking is an electrical breakdown on the surface of an insulating material. A large voltage difference gradually creates a conductive leakage path across the surface of the material by forming a carbonized track.

The voltage which causes tracking after 50 drops of 0.1% ammonium chloride solution has fallen on the material. The results of testing at 3 mm thickness are considered representative of the material’s performance in any thickness.

Protekt® HD Ranking: Thickness tested 3.0(mm) Value: CTI 600

Superior In WeatherabilityTesting Weatherability Properties

In order to ensure the durability of Protekt® HD backsheets against heat and chemical exposure, extensive testing against the effects of hydrolysis and thermo degradation has been conducted. Below is a list of the test that Protekt® HD has undergone to meet or exceeds industry standards in performance durability

Relative Thermal Index

RTI measures of the thermal stability of the polymeric material and determines whether the material is suitable for continuous use at a certain temperature. An RTI test is important to prove the backsheet maintains critical properties, to ensure the material will not be unacceptably compromised through chemical and thermal degradation.

Protekt® HD has been tested at  105°C and is suitable for thermal exposure at a continuous temperature of 85°C

Damp Heat

Damp Heat exposure to backsheet materials can cause delamination, color change, and deterioration of mechanical properties. Material is exposed to damp heating through the process of placing material into an environmental chamber and exposed to elevated temperatures and relative humidity (85°C, 85 RH) for 1000 hours.

Protekt® HD was evaluated with respect to adhesion, color change and deterioration of initial mechanical as a function of exposure to Damp Heat. In accordance to ASTM D903-98, ASTM D 3359-97 – resistant to delaminating and yellowing >1000 hours

Protekt® TFB HD was evaluated with respect to adhesion, color change and deterioration of initial mechanical as a function of exposure to Damp Heat. In accordance to ASTM D903-98, ASTM D 3359-97 – resistant to delaminating and yellowing >2000 hours

Heat Freeze Humidity

This is a cycle test that evaluates the material stability after Heat-Freeze Testing. Test starts at a temp of 25°C, temperature rises to 85°C  &  85RH per hour for 20 hours, and then temp is reduced to -40°C for four hours. The cycle is continued 10 times.

This test was done according to UL 1703 – Protekt® HD & Protekt® TFB  HD : > 10 cycles retains >80% of initial mechanical properties

UV Stability

UV exposure can cause backsheet material to become unstable, brittle and change color; testing is essential to determine backsheet material resistance to UV exposure.

Testing for Protekt® HD and Protekt® TFB HD  has been done in accordance to UL 746C  in order to pass test material must retain at least 70% of initial mechanical  properties.

Protekt® HD & Protekt® TFB HD: Retains >70% of initial mechanical properties

Flame ResistantTesting Flame Resistance

Potential ignition sources are overloaded or over heated electrical conductors and components. Polymeric materials that either directly contact or are in close proximity could become ignited and pose a potential risk of fire. This reality is carefully considered when developing our Backsheet materials. Careful amount of research and testing is conducted to ensure safety and reliability of our materials.

HAI –High Current Arc Ignition

The HAI test determines the materials ability to withstand electrical arcing either directly on or just about the surface of plastics materials. The HAI performance is expressed by the number or arc rupture exposures that the specimen resist ignition when the arc occur on or at a specific distance.

Ranking for Protekt® HD

HAI range mean number of arcs assigned: 120 or greater

Performance Level Category Assigned: 0

Protekt® HD was exposed to 150 arcs with no ignition.

ASTM – Flame Spread Index

The test measures and compares the surface flammability of materials when exposed to a prescribed level of radiant heat energy. It is intended for use in measuring the surface flammability of materials exposed to fire. This standard measures and describes the response of materials, products, or assemblies to heat and flame under controlled conditions. The values stated in inch-pound units are to be regarded as standard.

Flame Spread Index for Protekt® HD is 64.04 in accordance to ASTM E162

Vertical Burning

The material is tested in a vertical position and self-extinguished within a specified time after the ignition source was removed. The vertical ratings also indicate whether the test specimen dripped flaming particles that ignited a cotton indicator located below the sample.

Protekt® HD Test Results for Vertical Burn: 5VB

Flammability VB testing in accordance to IEC 60695-11-10

To receive a 5VB testing result, specimens must not have any flaming or glowing combustion for more than 60 seconds after the five flame applications. Specimens must not drip. Specimens must not be destroyed in the area of the flame.