Current Transformer Manual

About this manual

This manual explains the function of current transformers, their basic construction with primary and secondary windings, and how they provide safe current scaling and isolation for measurement and protection. It details the different types (measurement, protection, and instrument transformers) and the typical applications in power systems and laboratory settings.

The document also presents the calculation of current ratios, error sources, accuracy classes, rated capacities, voltage levels, and burden specifications. Practical examples illustrate how to select appropriate transformers, perform error compensation, and conduct various tests such as polarity check, demagnetization, and composite error measurement. This manual is written in Chinese.

What's inside

• Purpose and Basic Structure
• Rated Primary Current
• Basic Structure
• Error and Calculation
• Error Compensation
• Error Testing
• Accuracy Classes
• Rated Capacity and Burden
• Installation Types
• Measurement and Protection Applications

Specifications