Thermal Analysis of Overload Protection Relays using Finite Element Method
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| Title | Thermal Analysis of Overload Protection Relays using Finite Element Method |
| Authors | |
| Abstract | This paper describes a three-dimensional thermal model of the bimetal releaser from low voltage power circuit breakers. The model can be used to analyse the thermal behaviour of the bimetal strip during both steady-state and transient conditions. The steady-state thermal simulations have been done. The maximum temperature is obtained at the extreme of the movable end terminal of the bimetallic strip. The steady-state conditions are reached after approximate 600 seconds from the initial moment of warming. A similar time evolution can be noticed for trip and force characteristics. To validate the three-dimensional thermal model, some experimental tests both in steady-state and transient conditions have been done. It has been recorded the time evolution of the temperature rises, cooling, trip and force characteristics during transient conditions. There is a good correlation between experimental and simulation results. Hence, the maximum difference between the experimental and simulation values is less than 2.5°C. |
| Publisher | Indian Society for Education and Environment (ISEE) |
| Date | 2013-08-01 |
| Source | Indian Journal of Science and Technology Volume 6, Issue 8, August 2013 |