The Correlation Analysis of Short-circuit Current and Magnetization of Ferromagnetic Metals

Yini Xia; Yanmin Tong

doi:10.6911/WSRJ.202504_11(4).0011

Authors

Yini Xia
Yanmin Tong

DOI:

https://doi.org/10.6911/WSRJ.202504_11(4).0011

Keywords:

Short-circuit current, fire investigation; remanence value, regression analysis.

Abstract

This paper investigates the effect of short-circuit current on non-magnetic steel pipes to explain how different materials utilize the remanence method in fire investigations to analyze the variation laws of their own remanence. This provides data support and theoretical basis for determining the cause and location of fire incidents. The results show that under the influence of short-circuit current, the non-magnetic steel pipe becomes magnetized, and the extent of magnetization depends on the magnitude of the short-circuit current. The steel pipe will not be magnetized infinitely under different short-circuit currents; instead, the remanence value will reach a

This paper investigates the effect of short-circuit current on non-magnetic steel pipes to explain how different materials utilize the remanence method in fire investigations to analyze the variation laws of their own remanence. This provides data support and theoretical basis for determining the cause and location of fire incidents. The results show that under the influence of short-circuit current, the non-magnetic steel pipe becomes magnetized, and the extent of magnetization depends on the magnitude of the short-circuit current. The steel pipe will not be magnetized infinitely under different short-circuit currents; instead, the remanence value will reach a certain range and then stabilize without further increase. For every 20A increase in short-circuit current, the stable remanence range of the steel pipe increases by 4-8 Gs. Finally, the regression equation between current (x, in A) and remanence value (y, in Gs) is given as , with a coefficient of determination of 0.9997, indicating a high level of reliability in the results.

certain range and then stabilize without further increase. For every 20A increase in short-circuit current, the stable remanence range of the steel pipe increases by 4-8 Gs. Finally, the regression equation between current (x, in A) and remanence value (y, in Gs) is given as , with a coefficient of determination of 0.9997, indicating a high level of reliability in the results.

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