Application scenarios and selection criteria for the comprehensive testing system of current transformers

The comprehensive testing system for current transformers is an important equipment used for power system testing. Its application scenarios and selection criteria are as follows:

1. Application scenarios

The comprehensive testing system for transformers is suitable for laboratory and on-site testing, mainly used in the following scenarios:

① Current Transformer (CT) and Voltage Transformer (PT) Testing: The system is capable of accurately measuring multiple important testing items of CT and PT, including ratio difference, angle difference, excitation characteristics, direct resistance, etc.

② Protection and metering transformer testing: The system can be used to automatically test protection and metering transformers to ensure their accuracy and reliability in the power system.

③ Harsh environment testing: The system is designed for use in harsh environments such as high temperature, high humidity, sea, desert, extreme cold, and high altitude to ensure the accuracy of test results and the stability of equipment.

2. Selection criteria

When selecting a comprehensive testing system for transformers, the following selection criteria need to be considered:

① Basic electrical performance testing functions: including resistance measurement, voltage, current, and power measurement, etc., to ensure that the system can meet basic power testing requirements.

② Transformer parameter testing function: The system should have the ability to test various parameters of the transformer, including ratio, phase difference, transformation ratio error, rated power factor, and frequency characteristics.

③ Ratio error testing function: The system should be able to accurately measure the ratio error of the transformer to reflect its accuracy and precision.

④ Frequency characteristic testing function: Test the response characteristics of the transformer at different frequencies, evaluate its working state and response capability at different frequencies.

⑤ Steady state operating characteristic testing function: Test the steady-state response characteristics of the transformer to determine whether its performance meets the requirements in actual operation.

⑥ Automated testing function: Choosing a system with automated testing function can improve testing efficiency and accuracy, and reduce human errors during the testing process.

⑦ Flexibility and universality: The system should be suitable for testing transformers of different types and specifications, including common CT in power systems PT， And sensors, transformers, etc. in special fields.

⑧ Safety and reliability: The system should have comprehensive safety protection measures and fault diagnosis functions to ensure safety and reliability during the testing process.

In summary, the comprehensive testing system for current transformers has a wide range of application scenarios and important selection criteria in power system testing. Choosing a suitable testing system is crucial for ensuring the accuracy of test results and the safe operation of equipment.

The ZCHG-12 fully automatic current transformer calibration system is a new generation of transformer fully automatic accuracy testing system developed by our company to adapt to the fast and accurate characteristics of modern current transformer calibration. The device consists of a transformer calibrator, a programmable current transformer load box, a variable frequency power supply, and a high-speed transformer test bench. The operator can set the main parameters of the tested transformer, such as type, range, accuracy level, secondary load, power factor, and transformer station position, through the computer error verification management software. By transmitting and controlling through RS485, the measurement work of 12 current transformers with the same ratio can be completed at once, greatly improving work efficiency.

Kvtester Electronics Technology Co.,Ltd. is a high-tech enterprise specializing in power testing, testing, research and development, production, and sales of testing equipment. It has been engaged in the electrical testing industry for many years, and its products are of high quality. We welcome customers to come and purchase. Service hotline: 0086-27-81778799, to learn more, visit the official website: www.kvtester.com