The transformer DC resistance tester is divided into specifications such as 1A, 3A, 5A, 10A, 20A, 40A, 50A, 100A, etc. The instrument power supply is divided into external power supply AC220V, internal power supply (battery power supply), AC and DC power supply. At present, DC resistance testers with a capacity of 10A or more on the market are not battery powered.
Performance requirements, technical specifications, and characteristic analysis of transformer DC resistance tester:
1. Current and voltage: In actual measurement, different test currents should be selected according to different subjects. When the current is too small, the measurement accuracy will be affected. The output voltage determines the speed of measuring the DC resistance of the transformer
2. Measurement range: The DC resistance of general power transformers is between 100m Ω -100 Ω, while the measurement range of high-power inductors and other equipment is between 100u Ω -2K Ω
3. Measurement accuracy: The higher, the better
4. Instrument functions: single-phase measurement and three-phase measurement, data storage and printing
In principle, the larger the transformer capacity, the greater the test current.
The 10KV voltage level generally uses a 3-5A DC resistance tester;
The 35kV voltage level generally uses a 10a DC resistance tester;
The 110kV voltage level generally uses a 20A DC resistance tester;
The 220kV voltage level usually uses a 40A DC resistance tester.
Excessive current can cause transformer temperature rise, leading to inaccurate resistance testing, while insufficient current can result in low testing accuracy.
ZC-205A transformer DC resistance fast tester is the latest professional transformer DC resistance test equipment launched by our company. It is mainly used for the DC resistance test of transformer in power system. The instrument adopts large screen LCD display, full English menu, friendly man-machine interface, perfect function and convenient operation. It is an ideal instrument for transformer DC resistance test by power system and transformer manufacturers.
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
