BH-0.66-LJD2 Series Zero-sequence CT is made to work with microcomputer protection device, motor protection device, and relay, as a ground fault protection set, protecting and monitoring power supply and distribution systems. 
Rectangular window. Mainly suitable for single or multiple bus-bar applications. High accuracy class and large burden rating. Easy installation (onto the bus-bar). 
For power supply and distribution systems of up to 660V.