GIS externally-mounted current transformer

The present invention relates to a GIS externally-mounted current transformer. The GIS externally-mounted current transformer comprises a housing; more than two sets of axially aligned coils are arranged in the housing; a longitudinal section of the housing is of a U shape; a removable sealing plate is arranged at one end of the housing, which corresponds to an opening of the U shape; pouring intervals are formed between the coils and the sealing plate, and between radial insides and/or radial outsides of the coils and a corresponding radial inner side wall or a corresponding radial outer side of the housing; epoxy resin or polyurethane is poured inside the pouring intervals; and pouring holes are formed on the sealing plate. According to the technical scheme adopted by the present invention, pouring does not need to occupy large compression structure installation space and operation space, and a larger space can be left for installing coils with higher parameters. Compared with the prior art, the GIS externa