Photovoltaic fuse arc suppression: segmented capability of fuse
DC arc suppression is one of the most important features that can be designed in a photovoltaic fuse. An arc of electricity may develop when the fuse element melts to break a circuit. It is relatively easy to put out this arc in an AC circuit, since the current in an AC circuit crosses zero many times a second by nature. Nevertheless, in a DC circuit, the current is fixed, and the arc may be maintained indefinitely, which results in severe damage and possible fire hazards.
A photovoltaic fuse is constructed with a high-performance arc-quenching mechanism and commonly incorporates a granular filler substance such as quartz sand to suppress the arc quickly. This is a very important feature since it will ensure the circuit is properly and securely opened, will avoid additional damage, and secure the whole system. This absence of an option would make even a relatively small defect a huge safety concern.
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