The testing accuracy and stability of the comprehensive testing system for current transformers are important indicators for evaluating their performance. The following is a detailed analysis of these two aspects:
1. Testing accuracy
The testing accuracy of the transformer comprehensive testing system is usually very high, which can meet various testing requirements. Specifically, its testing accuracy is mainly reflected in the following aspects:
① Voltage measurement accuracy:
The comprehensive testing system for current transformers usually has high-precision voltage measurement function, wide measurement range, and high accuracy. For example, some models of testers can achieve a voltage measurement accuracy of ± 0.1% within the range of 2~100Vrms.
② Accuracy of current measurement:
Current measurement also has high accuracy and can accurately reflect the current characteristics of transformers. The output current range of the tester is large, and it can maintain high measurement accuracy at different current values.
③ Variable ratio measurement accuracy:
The tester also performs well in measuring the transformation ratio of transformers. Both CT and PT have a wide range of variable ratio measurements and high accuracy. For example, some models of testers can achieve an accuracy of ± 0.1% when measuring CT transformation ratio.
④ Phase measurement accuracy:
Phase measurement is an important part of transformer testing. Testers usually have high-precision phase measurement functions, which can accurately measure the phase relationship of transformers. For example, the phase measurement accuracy can reach ± 2 minutes and the resolution is 0.5 minutes.
2. Stability
The stability of the comprehensive testing system for current transformers is also very important, as it relates to the reliability and repeatability of the test results. Here are several key points regarding stability:
① Long term stability:
The performance of the tester should remain stable during long-term use. This includes the stability of measurement parameters such as voltage, current, transformation ratio, and phase. By regular calibration and maintenance, the long-term stability of the tester can be ensured.
② Environmental adaptability:
The tester should have good environmental adaptability and be able to maintain stable performance under different conditions such as temperature, humidity, and electromagnetic interference. For example, some models of testers can operate normally within a temperature range of -20 ° C to 50 ° C and have strong humidity adaptability.
③ Software stability:
In addition to hardware stability, software stability is equally important. Testers are usually equipped with advanced software systems and user interfaces, which can automatically complete various test settings and data recording. The stability of software directly affects the overall performance and user experience of the tester.
④ Fault self diagnosis and protection:
The tester should have fault self diagnosis and protection functions, which can timely alarm and take corresponding protective measures when faults occur. This helps to avoid misoperation and equipment damage during the testing process.
In summary, the comprehensive testing system for current transformers has shown excellent performance in terms of testing accuracy and stability. Its high-precision measurement function and stable performance provide reliable support for transformer testing in power systems. However, in order to ensure the long-term stability and accuracy of the tester, users still need to pay attention to regular calibration and maintenance during use.
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
