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Unlike the voltage or power transformer looked at previously the current transformer consists of only one or very few turns as its primary winding.
Types of current transformer. Wound type current transformer. Different types of current transformers. Donut shaped toroidal transformers save space compared to e i cores and may reduce external magnetic field. What is current transformer ct.
Current transformer protection transformers. This type of transformers is used in component protection purposes. Step up step down air core iron core power transformer indoor outdoor. A current transformer is an instrument transformer used along with measuring or protective devices in which the secondary current is proportional to the primary current under normal conditions of operation and differs from it by an angle which is approximately zero.
The primary of the current transformers is directly connected in series with the line conductor that carries the entire current to be measured. The working principle of the current transformer is somewhat different when we compare it with a normal voltage transformer. A current transformer has a primary winding a core and a secondary winding although some transformers including current transformers use an air core. Whenever ac supplies throughout the primary winding then alternating magnetic flux can be generated then ac will be induced within the secondary winding.
These use a ring shaped core copper windings wrapped around this ring and thus threaded through the ring during winding and tape for insulation. The current transformer is mainly classified into three types i e wound current transformer toroidal current transformer and bar type transformers. Current transformer device working principle. This article discusses different types of transformers and their applications.
Wound transformer in this transformer the primary winding is composed inside the transformer. While the physical principles are the same the details of a current transformer compared with a voltage transformer will differ owing to different requirements of the application.
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