- the single-turn (bar) primary and
- the multi-turn wound primary.
Single Turn (Bar) Primary CT
Multi Turn Wound Primary CT
In Multi-turn Wound Primary current Transformer, the primary winding is also constructed inside the current transformer body. The primary winding is usually of a single turn. Wound Primary Current transformers are used in applications which require small current transformation ratios. They are more accurate and have a higher burden capacity. The wound primary is usually designed with toroidal cores for high efficiency.