Structural Design and Performance Analysis of Current Transformer

Current transformer is an indispensable and important component in the power system. Its design and performance directly affect the operating efficiency and safety of the entire system. With the development of technology, the structural design of current transformer is also being optimized to meet various challenges in modern power systems. This article will analyze the structural design, performance characteristics and modern application scenarios of current transformer in detail.

Structure of Current Transformer
The basic structure of current transformer includes iron core, primary winding and secondary winding. One side is connected to the high-voltage power system. As the primary side, it usually has only one or several turns of conductor and bears high current; the secondary winding has more turns and generates corresponding small current through electromagnetic induction. The iron core is used to concentrate and guide the magnetic flux to ensure the efficiency of the induction process.

Depending on the purpose and installation occasion, the structure of current transformer can have different forms. Common designs include:

Toroidal current transformer: This is a common current transformer with a closed ring core, which can better close the magnetic flux and reduce energy loss. It is widely used in industrial and commercial power systems.
Split current transformer: The core of this type of transformer is separated, which is easy to install and maintain. It is suitable for occasions where temporary measurement is required or it is inconvenient to cut off the power.
Rod current transformer: This type of transformer has a compact structure and is suitable for current monitoring of high-voltage transmission lines.

Performance characteristics
The performance of the current transformer directly affects its use effect. The following are several important performance indicators:

Accuracy: The main task of the current transformer is to accurately convert the large current on the primary side into the small current on the secondary side. Therefore, accuracy is an important indicator. Especially in the current transformer for metering, the error must be controlled within a certain range.
Load capacity: The current transformer needs to face different current load conditions, and its load capacity directly determines whether it can output stably. Insufficient load capacity may cause unstable output current and affect measurement accuracy.
Insulation performance: As a key equipment in the high-voltage power system, the insulation performance of the current transformer must be excellent to prevent high-voltage current from causing damage to the system or personnel.
Durability: Current transformers often need to work for a long time in harsh environments, and their materials and structures must be able to withstand the test of time and environment to ensure long-term safety and reliability.