Test standard: UL1703

Salt Spray Test

To determine whether rainwater can enter the module or assembly under field conditions, and if the entered water can cause a ground fault or a safety hazard.

[Device]

The apparatus for salt spray testing is to consists of a chamber with inside measurement of 48 in by 30 in by 36 in (1.22 m by 0.76 m by 0.91 m) or larger if required;

A salt solution reservoir; a supply of conditioned compressed air;

One dispersion tower constructed in accordance with ASTM designation B117-97, for producting a salt spray;

Specimen supports;

Provision for heating chamber;

And necessary means of control.

[Test Procedure]

A) The salt solution is to consist of 5% by weight of common salt (sodium chloride) in distilled water. The pH value of the collected solution is to be between 6.5 and 7.2, and have a specific gravity between 1.026 and 1.040 at 95°F (35°C). The temperature of the chamber is to be maintained within the range of 92°F to 97°F (35°C-36°C) throughout the test.

B) The test sample is to be supported on plastics racks at an angle of 15 degrees from the vertical.

C) Drops of solution which accumulate on the ceiling or cover of the chamber are to be diverted from dripping on the specimen. Drops of solution which fall from the specimen are not to be recirculated, but are to be removed by a drain located in the bottom of the apparatus.

D) Reference specimens, 4 in by 12 in (102 mm by 305 mm) commercial zinc coated sheet steel are to be used for comparison. The selected specimens are to be represent of the minimum acceptable amount of zinc coating under requirements for G90 or G60 coating designation (as appliable, see accessibility of Uninsulated Parts, Section 15) as determined in accordance with standard test method for weight of coating on zinc-coated iron or steel articles, ASTM A90-81(1991) such zinc coatings are considered as providing acceptable protection against corrosion.

E) The zinc coated reference specimen are to be cleaned with soap and water, rinsed with ethyl alcohol and ethyl ether, dried, blade, and the cut edges protected with pain, wax or other effective medium before being placed in the salt spray chamber.

F) Both the reference specimen and samples under test are to be scribed with a single groove approximately 6 in (152m) long, to expose the underlying steel.

G) The test is to continue until the coating on the test sample or reference samples are broken down and corrosion products are formed on the underlying steel.

Moist Carbon Dioxide/Sulphur Dioxide Corrosion Test

[Device]

The chamber size shall be 48 in by 30 in by 36 in (1.22 m by 0.76 m by 0.91 m) or if a larger chamber is required. To maintain a temperature of 95±3F (35±2 "C), a water jacket and thermostatic control heater are required.

[Test Procedure]

A) The specimens are to be supported on plastic racks at an angle of 15 degrees from the vertical.

B) Reference specimens, 4 in by 12 in (102mm by 305mm) commercial zinc coated sheet steel are to be used for comparison.

C) The zinc coated specimens are to be cleaned with soap and water, rinsed with ethly alcohol and ethyl ether, dried, and protected with paint, wax or other effective media before being placed in the chamber.

D) Both the reference specimen and sections of the module being tested are to be scribe with a single groove approximately 6 in (152 mm) long to expose the underlying steel.

E) The test is to continue until the coating on the module or reference specimen is broken and corrosion products are formed on the underlying steel.

Test standard: IEC62688, IEC62108, UL1703

[Test Purpose]

To determine whether rainwater can enter the module or assembly under field conditions, and if the entered water can cause a ground fault or a safety hazard.

[Test Procedure]

A) Fixture installation of modules and components can achieve the following four directions:

The angle between the front angle and the horizontal angle is 45 degrees;

At the stop position;

Within normal range which allows tracking Angle;

Reverse position (using the appropriate operating mode);

Note: for some design, these directions may be superfluous.

A) Complete the wiring connection according to the specified connection method and installation instructions. When there are multiple specified wiring modes, should choose at least one code which can restrict the water into wiring space.

C) The fixtures used for the rain test need to meet ANSI/UL 1703:2002 standard requirements.

D) Modules or components were sprayed water more than 1 hour, spray in every four directions, spray for no less than 15 minutes, need to detect modules or components for testing whether the conductive part with water or water infiltration after one hour of spraying, If water exists in the above areas, you need to take corresponding measures, such as increasing drain, etc., maintain water depth does not reach the conductive parts.

E) the Insulation test (as shown in figure 13) should start after 1-2 hours of spraying, don't manual stop spraying, If found that insulation resistance value is lower than the specified value, and the reason is moisture inside the module, then Wait for the module to dry and re-insulate.

Test standard: IEC61215, IEC61646, IEC62688, IEC62108, UL1703

[Test Purpose]

To identify the ability of the component to withstand the effects of high temperature, high humidity and subsequent sub-zero temperature, this test is not a thermal shock test.

[Test Procedure]

A) pretreatment

Will be at room temperature without pretreatment of components in the air.

B) Strict conditions

Test temperature: 85 ℃ + 2 ℃

Relative humidity: 85% ± 5%

Test time: 1000 h

Test standard: IEC61215, IEC61646, IEC62688, IEC62108, UL1703

[Test Purpose]

To identify the ability of the component to withstand the effects of high temperature, high humidity and subsequent sub-zero temperature, this test is not a thermal shock test.

[Device]

A) A climate chamber with automatic control of temperature and humidity, can hold one or more components, as shown in figure 12.

B) A device of supporting components is installed in the climate chamber, and to ensure that the air around can freely cycle, heat transfer installation or device should be small, in fact, components should be insulated.

C) A instrument to measure and record the component temperature with accuracy of ±1 ℃. If multiple components test at the same time, only need to monitor one representative component temperature.

D) In the whole test process, instrument to monitor each component internal continuity.

[Test procedure]

A) Put the temperature sensor in the ahead or behind of the central component.

B) Put the components into climate chamber at room temperature.

C) Connect temperature sensor with temperature monitor.

D) Closed climate chamber, make the component complete 10 times circulation (as shown in figure 12), maximum and lowest temperature should be within ±2℃ in value, when temperature above room temperature, relative humidity should be kept within ±5% in value of less than 5%.

Test standard: IEC61215, IEC61646, IEC62688, IEC62108

[Test Purpose]

To determine the component's thermal mismatch stress, fatigue, and other abilities caused by repeated temperature changes.

[Device]

A) A climate chamber, with automatic temperature control, make the internal air circulation and avoid moisture condenses on the surface of the component, in the process of test device, and can swim at one or more components are shown in figure 11 thermal cycling test.

B) In the climate chamber is installed or supporting components of the device, and to ensure that the air around can free circulation, installation or supporting device of heat conduction is small, so in fact, should make components in the insulation state.

C) Measure and record the component temperature instrument, the accuracy of ±1 ℃, the temperature sensor should be placed in a central component of surface before or after. Such as multiple components test at the same time, a representative need to monitor the temperature of the component.

D) In the process of test, the group with access to equal to the maximum power point of standard test under the condition of current equipment.

E) In the process of test, monitoring through each component of current instruments

[Test procedure]

A) Assemble the components in the climate chamber at room temperature. If the component's border does not conduct well, install it on a metal frame to simulate an open support frame.

B) Connect the temperature sensor to the temperature monitor, connect the positive terminal of the module to the positive electrode of the current meter, and connect the negative electrode to its negative electrode. In the 200 thermal cycle test, connect the module with the maximum power point current under standard test conditions ±2%, only when the component temperature problem exceed 25℃ keep the flow of electric current, 50 times thermal cycling test does not require through current.

C) Closed gas machinery room, according to the distribution of figure 11, to circulate the temperature of the components between 40℃±2℃ and +85℃±2℃, temperature change rate can't exceed 100℃/h, in every extremely temperature, should remain stable for at least 10 min except the components of the heat capacity greatly need longer time to insert ring, one cycle time no more than 6 h, the number of cycle corresponding side is shown in figure 1.

D) In the process of the whole test, record the temperature of the component, and monitoring by component of current. Note, in a parallel way components branch will cause the discontinuity of voltage, but does not cause 0.

Test standard: IEC61215, IEC61646, UL1703

[Test Purpose]

To determine relevant material and adhesive connection of UV attenuation by UV pretreatment experiment before thermal cycle testing and humidity freeze testing for components.

[Device]

A) when subjected to ultraviolet irradiation can control temperature of components of equipment, components must at 60℃+ 5℃temperature range.

B) measuring temperature record component devices, precision for±2℃. temperature sensor should install in the near the central component before or after surface, if more than one at the same time, test components, a representative need to monitor the temperature of the component.

C) Irradiation can test instruments to the component test surface UV irradiance, the wavelength range of 280nm to 385 nm and 320 nm and 385mm, the precision is 15%.

D) ultraviolet radiation light source, the irradiance uniformity in the component test plane is ±15%, beyond detection wavelength of the radiation is less than 280 mm, could produce according to the regulations of interested in spectral irradiance range need.

[Test procedure]    

A) The use of calibration radiometer measurement component test surface irradiance, ensure that the wavelength of 280 nm to 385 nm irradiance does not exceed 250 wm^-2(approximately equal to 5 times the natural light level), and in the whole measurement plane arrive the irradiance uniformity ±15%.

B)To install open circuit components to the selection in step A) position measurement plane, and ultraviolet light are vertical, to ensure that the component temperature range at 60℃±5℃.

C) To make components undergo wavelength range from 280 mm to 385 mm for 15kWh-m^-2ultraviolet radiation, which is 280 nm to 320 nm wavelength ultraviolet radiation for 5k W/m^-2, keeping the temperature of the components in the process of test in the range specified above.

Repeat the whole test.