High-precision wide-range current transformer
By using a hybrid core structure and zero-flux current transformer technology, the problem of insufficient measurement accuracy of traditional current transformers in a wide dynamic range has been solved, achieving high-precision measurement within the range of 0.1% to 200% of the rated current, with an error of less than 0.2%.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HENAN XJ INSTR
- Filing Date
- 2026-04-22
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional current transformers have poor measurement accuracy over a wide dynamic range, which cannot meet the requirements for large-scale grid connection of new energy distributed power sources in new power systems.
It adopts a hybrid iron core structure. The main iron core is made of metal sheets of different materials coaxially stacked, and the auxiliary iron core is used to wind the compensation winding. The measurement error is compensated by the principle of parallel current shunting of magnetic circuit. Combined with zero magnetic flux current transformer technology, the error potential is compensated.
It improves measurement accuracy over a wide dynamic range, meeting the high-precision measurement requirements of 0.1% to 200% of the rated current, with an error of less than 0.2%, meeting the 0.2-level measurement accuracy requirement.
Smart Images
Figure CN122417645A_ABST