Insulation tester

high-voltageinsulation resistancepower

With more and more photovoltaic applications and larger scale of power stations, more and more problems of solar cell modules have been exposed, such as power reduction, poor insulation and delamination. After years of research, it has been found that a large part of the problems in the application process of components is due to leakage current between the internal conductor and the ground (through the border). Long-term leakage current will cause changes in the state of the carrier and depletion layer of the cell, corrosion of the contact resistance in the circuit, electrochemical corrosion of the packaging material and other problems, resulting in power attenuation of the cell, increase of series resistance, reduced light transmittance, delamination and other phenomena affecting the long-term power generation and life of the component. Functional features The photovoltaic module frame end is grounded, which not only simulates the actual situation, but also prevents the potential danger caused by the frame high pressure in the testing process; For each component, the 4-wire test method is adopted, 2 high-voltage wires and 2 ground wires. The high-voltage wires are connected with the components internally through the junction box, and the ground wires are connected with the frame or connected in other effective positions. Each channel is independent of each other, the polarity of the voltage of each channel and the time can be set separately; Voltage, leakage current, insulation resistance display at the same time; Real-time monitoring of voltage, leakage current, insulation resistance curve;