In the last issue, we introduced the performance test of IEC61215. In this issue, Millennial Solar will introduce to you the electrical safety test.

Insulation test

Purpose: To determine whether the insulation between the current-carrying part of the module and the module frame or exterior is good.

Test process and requirements:

(1): 0→1000V (increase the voltage of the insulation tester at a rate not greater than 500V·s-1)

(2): When the voltage does not exceed 50V, 500V is measured]

(3): Measure insulation resistance (insulation resistance ≧40MΩ/m2)

Wet leakage current test

Purpose: To evaluate the insulation performance of components under humid working conditions and to verify that moisture from rain, fog, dew or melted snow cannot enter the working part of the internal circuit of the component. If moisture enters, it may cause corrosion, leakage or safety accidents.

Experimental procedure:

(1): Short-circuit the output of the component to the positive terminal of the test equipment, and use an appropriate metal conductor to connect the test liquid to the negative terminal of the test equipment.

(2): Increase the voltage applied by the test equipment until 500V at a speed not exceeding 500V·s-1, maintain the voltage for 2 minutes, and test the insulation resistance.

(3): Reduce the voltage to zero and short-circuit the terminals of the test equipment to release the voltage inside the component.

The following requirements should be met:

(1) For components with an area less than 0.1 m 2 , the insulation resistance is not less than 400MΩ.

(2) For components with an area greater than 0.1 m 2 , the test insulation resistance multiplied by the component area should not be less than 40MΩ·m.

Bypass diode performance test

Purpose: To determine the ability of components to withstand long-term moisture penetration.

Test process: Test in a hot and humid environment with temperature: 85℃±2℃ and relative humidity: 85%±5% for 1000h.

The following requirements should be met:

(1) No serious appearance defects;

(2) The attenuation of the maximum output power shall not exceed 5% of the test value before the test;

(3) The insulation resistance should meet the same requirements as the initial test.

Damp Heat Test Chamber

Solar modules will withstand various harsh weather tests during their application. Among them, the performance of components such as their ability to withstand high temperatures, high humidity, and long-term moisture penetration needs to be evaluated. DH environmental simulation tests are used to verify and evaluate the reliability of components or materials and to identify manufacturing defects early through thermal fatigue-induced failure modes. Meet: IEC61215-MQT13; IEC61730-MST53. Continuous operation for more than 1,000 hours at 85°C and 85%RH requires ultra-high stability. The ME-PV-WSDH-3000 developed by Millennial Solar is very high-quality in terms of manufacturing process and electronic equipment reliability.

E-mail: market@millennialsolar.com

Every test in the IEC61215 performance test is very important. Each test is a test of the module product. If you have any questions, please contact Millennial Solar.