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Electrical equipment has to carry the rated normal current and short time withstand current. As shown in previous publications, the voltage-temperature relation allows calculating the temperature of contact elements and connectors for steady- state operating points. In the case of transient electric-thermal load, a finite-element analysis (FEA) is required to calculate the time-dependent distribution...
Researchers and engineers use the voltage–temperature ($V$ –$T$ ) relation to calculate the maximum temperature of electric contacts from contact voltage drop and thus evaluate their performance. However, researchers found deviations from the $V$ –$T$ relation for large contact systems when heat dissipation to the environment becomes significant. We investigated the applicability of the $V$ ...
With the voltage-temperature (V-T) relation, established by Kohlrausch in 1900, the electric potential distribution in an arbitrarily shaped, thermally insulated, current carrying conductor can be used to calculate the associated temperature distribution. An important application is the determination of the maximum temperature in electric contacts. However, researchers found deviations from the V-T...
High-voltage switchgear requires sliding and plug-in connections with rated continuous currents up to several kiloamperes and rated short-time withstand currents in the range of tens of kiloamperes. In these high power connections, spring loaded contact elements realize the electric and thermal contact of plug and socket. Contact elements transfer the total electric current of the main circuit and,...
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