BH-LJ Series zero-sequence CT is made to work with the dedicated protection device as a ground fault protection set. Mainly suitable for cable application type, small current grounding systems of up to 10kV. 
Can also be used for other types of grounding systems. For indoor use,cable application. Because of its excellent permeability core material and flame retardant PC casing, it has several advantages as small in size,high accuracy class, nice exterior design, good insulation and moisture resistance ,etc. when compared with the epoxy resin cast or wrapping type of CT in the domestic market.