PLASTIC OUTER CASING-TYPE CURRENT ACQUISITION MODULE FOR PHOTOVOLTAIC COMBINER BOX

摘要

A plastic outer casing-type current acquisition module for a photovoltaic combiner box. The plastic outer casing-type current acquisition module comprises at least one combiner bar, at least one docking bar, a plurality of current acquisition units and an MCU processing circuit. The current acquisition units are respectively and independently perpendicular to the docking bars and are movably installed between the combiner bar and the docking bars. The MCU processing circuit is movably connected to the current acquisition units using connectors. A current acquisition circuit may be connected to or disconnected from the MCU processing circuit via plug-in means. The MCU processing circuit automatically detects and identifies whether the connections between the MCU processing circuit and the various current acquisition units are disconnected. A signal interface on an MCU processing circuit board outputs current measurement values of various photovoltaic module strings in the form of digital signals via bus means. The current acquisition module constructs a direct current combiner system having any number of loops within the range of not exceeding 16 photovoltaic module string columns according to an application environment and user requirements, has features such as small size, convenience, strong flexibility and easy maintenance, and automatically detects plug-in connection failure. In addition, rapid replacement and maintenance may be performed when a branch circuit fails.