Model L zero-sequence CT is made to work with BH protective relays as a protection set, providing current leakage protections for the equipment and personnel, as well as alarm for electrical fire of the power supply and distribution systems.   
     Suitable for applications of multi-cable with various sizes. Mainly used in

TT, TN, IT power supply and distribution systems of up to 660V. 
     Made with high permeability material. Can quickly and accurately detect,
with reliability, any ground fault current of 10mA and up in the circuit it's 
protecting. It has a quite high linearity. 
     Modern structure and appearance design. Light weight and with some degrees of anti-electromagnetic interference ability. Small difference in electrical performance among the products of various specifications in the series, which makes them highly interchangeable within the series.