They are designed to convert a large current to a value that is convenient for measurement, they are component products and are used in complete devices for both internal and external installation of alternating current at a voltage from 10 kV to 220 kV.
- Reference type (for 3-10 kV, for 20-24 kV, for 35 kV);
- Pass-through type (for 6-10 kV) —
- Built-in type (for 0.66-750 kV) —
- Bus (for 0.66 kV) —
- Zero sequence (for 0.66 kV).