From the placement of high-voltage switchgear, it can be divided into outdoor type and indoor type. 10kV and below are mostly user indoor type. According to different primary line schemes, it can be divided into incoming and outgoing line switchgear, connecting oil switchgear, bus section cabinet, etc. Less oil circuit breakers or vacuum circuit breakers are mostly installed in 10kV incoming and outgoing line switchgear. The operating mechanisms of circuit breakers are mostly spring operating mechanisms or electromagnetic operating mechanisms, and some are equipped with manual operating mechanisms or permanent magnet operating mechanisms. Different switch cabinets have great differences in structure, which will affect the selection and installation of sensors.

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