Photovoltaic connector, also known as MC connector, occupies a small proportion in photovoltaic system, but many links are needed, such as junction box, junction box, cable connection between components and inverters. Many construction personnel do not know enough about connectors, and there are many power station failures caused by connectors. In another report “review and analysis of factors affecting photovoltaic power generation” released by solarbankability in July 2016, among the TOP20 influencing factors of power station, Power loss from broken or burned connectors came in second.
The cause of photovoltaic connector burn, in addition to the quality of the connector itself, another very important reason is that the construction is not done well, resulting in the virtual connection of the connector, which causes the DC side arc, and then cause a fire. The problems caused by the connector also include: increased contact resistance, connector heating, shortened life, connector burning off, group series power failure, junction box failure, component leakage and other problems, resulting in the system can not work normally, affecting the efficiency of power generation.
Photovoltaic connector is a very important part of photovoltaic system, which should attract enough attention. In the process of product selection and construction, the following points should be paid attention to:
1, the use of domestic and foreign famous brand and reliable quality products
2, the products of different manufacturers can not be mixed together, the products may not match.
3, the use of professional stripping pliers and crimping pliers, not professional tools resulting in bad crimping. For example, part of the copper wire is cut off, some copper wire is not pressed in, mistakenly pressed to the insulation layer, the pressing force is too small or too large.
4. After the connector and cable are connected, check it. Under normal circumstances, the resistance is zero and both hands will not be broken.
Post time: Nov-20-2021