mV Split Core Current Transformers. A range of mV split core current transformers are designed to fit into confined spaces while the primary conductor is still live. The current transformers are made in a compact design with a mechanical hinge for multiples opening and closing action. For connection into existing networks, they are often for use with multi function meters that have 0.333 V input. High sensitivity Class 1 accuracy Construction- ferrite core material Case nylon UL flame retardant rating 94V-0 Linearity with minimum phase shift 0.333 V ac secondary output at rated current Mechanical hinge Input frequency 50 Hz to 400 Hz Maximum primary voltage 720 V ac 1 m long flying lead twisted pair (22 AWG)