How many types are the current transformers classified into?

Current transformers can be classified into several types based on their construction, application, and performance characteristics. Here are the main types:

1. Wound Type Current Transformer: In this type, the primary winding is composed of one or more turns of heavy conductor wound around the core. It is directly connected in series with the line carrying the current to be measured or controlled.

2. Bar-Type Current Transformer: This type has a permanent bar-shaped conductor passing through the transformer core to serve as the primary winding. It’s simple and robust, typically used for low voltage scenarios.

3. Toroidal (Window) Type Current Transformer: These transformers do not have a primary winding. Instead, the line that carries the current flowing in the network passes through the window or hole of the toroidal transformer.

4. Ring Type Current Transformer: This is a variation of the toroidal type and is often used for high voltage systems. The conductor or bus bar acts as the primary winding, passing through the ring-shaped core.

5. Multi-ratio Current Transformer: This transformer allows for selection from several different current ratios in one device. The primary winding can be connected in multiple configurations to achieve different ratio settings.

6. Split-Core Current Transformer: Designed for easy installation, the transformer can be opened and installed around the conductor without disconnecting the circuit the conductor belongs to.

7. Dry-Type Current Transformer: These transformers are designed to avoid the use of liquid insulating mediums, often employing