千安级宽频交流大电流校准系统研究

doi:10.3969/j.issn.1000-1158.2025.01.07

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Abstract The kA level wideband AC high current calibration system is introduced to stress the calibration of AC high current with a maximum range of 2 kA and frequency of 50 Hz~1 kHz. To ensure the integrity of the AC high current traceability chain, the calibration method of compensated AC current ratio standard has been studied. A set of AC current ratio calibration devices that can cover ratios up to 1000:1 and frequencies up to 1 kHz has been developed, solving the key issue of non-power frequency current ratio standard traceability. Related tests have been conducted to verify the reliability of the quantity transmission of the AC current ratio self-calibration system. Through the establishment of wideband AC high current calibration system, calibration experiments were conducted on the tested AC high current source. It was verified that the expanded uncertainty of the system is about 2.4×10-4, which could meet the calibration requirements of most wideband AC high current devices.

Received: 25 May 2024 Published: 14 January 2025

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TB971

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	Articles by authors
	CHEN Shaohua
	YU Hezhen
	WANG Shuqiang
	JIN Haibin
	HUANG Chen

Cite this article:

CHEN Shaohua,YU Hezhen,WANG Shuqiang, et al. Research on kA Level Wideband AC High Current Calibration System[J]. Acta Metrologica Sinica, 2025, 46(1): 36-41.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2025.01.07 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2025/V46/I1/36

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