This is SCT-013-030 Non-obtrusive AC Current Sensor Clamp Sensor 30A. SCT-013-000 is a Non-Invasive AC current sensor i.e. it is a present transformer which can be utilized to gauge AC current up to 100 amperes.
Current transformers (CTs) are sensors are for estimating exchanging current. They are especially helpful for estimating entire building power utilization (or age so far as that is concerned). The split center sort, for example, the SCT-013-030 CT in the image is especially appropriate for DIY use. Clasp this SCT-013-030 straight on to either the live or impartial wire coming into the working without doing any high voltage electrical work.
Like some other transformer, a present transformer has an essential winding, an attractive center, and an optional winding. On account of entire building checking the essential is the life or the impartial wire (not both) coming into the building itself and experiences the opening in the CT. The optional winding contains numerous turns of fine wire housed inside the packaging of the transformer.