Views
5 years ago

IBC SOLAR QUALITY: MODULE TEST PROCEDURE

  • Text
  • Module
  • Modules
  • Solar
  • Inspection
  • Electroluminescence
  • Insulation
  • Resistance
  • Voltage
  • Measurement
  • Output
IBC SOLAR Module Testing Methods Brochure

In light of the truth.

In light of the truth. Still watertight? Electroluminescence measuring for PV modules IEC 82/1062/CD:2016 Measuring the insulation resistance under wet conditions DIN EN IEC 61215-2:2022-02 | MQT15 Explanation When applying an electrical voltage to the PV module, light will be emitted by the materials (EL for short) that is captured by an electroluminescent camera. Purpose Electroluminescence images of PV modules reliably indicate possible material defects, such as hair-line cracks. Test device • Camera: Great Eyes GE 2048 2048 FI model • CCD sensor specification: 2048 x 2048 pixel format • Camera specifications: Hermetically sealed vacuum head • Software: Integrated and can be controlled with a PC Freely-selectable current and voltage values Process • The PV module is brought into a darkroom to ensure high-quality images • The image angle to the surface must be observed • The connecting cables (+) (-) are connected correctly to the test object • A foreign light source must not be used • The electrical DC power supply is fed in with a voltage that Isc must reach. In order to ensure identical image quality, the DC power supply that is applied is not changed for the same module types • Test temperature: +20°C to +25°C • A temperature fluctuation of 1°C must not be exceeded during the measurement Purpose Evaluating the insulation of the PV module when exposed to moisture. Rain, dew or melted snow must not enter active parts of the PV module in order to prevent corrosion, earth faults and safety hazards. Test device Water tank for PV modules with: • A DC voltage source that can generate a 1,500 V system voltage and is equipped with a current limiter • Measuring device to determine the insulation resistance Process • Prepare water so that the temperature is at +25°C (±2) • Insert the PV module into the water basin until it is covered • Do not immerse the junction boxes too. They will be covered with water • The short-circuited output terminals of the PV module will be connected to the positive terminal of the test device • The water must be connected to the negative terminal of the test device with a suitable metallic conductor • Test period: 3,5 minutes • If modules have an area of greater than 0.1 m², the measured insulation resistance multiplied by the module area must not be less than 40 MΩ x m² Example Measured insulation resistance for module area exceeding 0.1 m² IBC SOLAR standard size = 1.722 mm x 1.134 mm = 1,92 m² 40 MΩ x 1,92 m² = 78,08 MΩ Short-circuited terminals Positive terminal of the test device Test device with measuring device to determine insulation resistance + – Junction box PV module Metallic conductor negative terminal Electroluminescence image of an intact PV module Electroluminescence image of a faulty PV module Water tank with water 8 9

English Documents

IBC SOLAR – a strong global partner for solar power

IBC SOLAR AG has been successful for more than 40 years and is amongst the leading international energy companies, which provide high-performance system solutions in every size and for every application with intelligent photovoltaic systems. The economic strength and financial independence is confirmed by globally recognised rating agencies.

Smart Systems for Solar Power thanks to perfectly matched components. More than 1,000 highly qualified partners around the world, as well as more than 6 Gigawatts of installed power underlines the high level of expertise of IBC SOLAR.