20.500.12556/RUL-165269 Vpliv temperature okolice na izklopno karakteristiko kombiniranega zaščitnega stikala The influence of the ambient temperature on the tripping behaviour of the residual current circuit breaker with overcurrent protection V diplomskem delu smo obravnavali vpliv temperature okolice na izklopno karakteristiko kombiniranega zaščitnega stikala. Izklop sproži bimetalni disk, ki se pri približno 127,5 °C upogne, s čimer prekine tok. Ker je izklopna karakteristika umerjena pri 30 °C, ima temperatura okolice pomemben vpliv na delovanje stikala. Pregled literature nam je omogočil osnovo za eksperimentalni del, v katerem smo z uporabo termovizijske kamere in termoparov izmerili temperature komponent tokovodečih delov, kar smo uporabili kot referenco pri razvoju termodinamičnega numeričnega modela. S tem modelom smo izračunali izklopne tokove pri različnih temperaturah okolice in jih primerjali z eksperimentalno določenimi izklopnimi tokovi. Na koncu smo določili korekcijske faktorje in prilagojene nazivne tokove glede na okoliško temperaturo. In this thesis, we examined the influence of ambient temperature on the tripping characteristics of a residual current circuit breaker with overcurrent protection (RCCB). The tripping characteristic is ensured by a bimetallic disc that bends at approximately 127.5 °C, causing the switch to trip and interrupt the current. Since the tripping characteristic is calibrated at 30 °C, changes in ambient temperature significantly affect the switch's performance. A review of relevant literature laid the groundwork for the experimental work, in which we measured the temperatures of current-carrying components using a thermal imaging camera and thermocouples. These measurements served as reference data for developing a thermodynamic numerical model. Using this model, we calculated tripping currents at different ambient temperatures and compared these results with experimentally determined tripping currents. Finally, we calculated correction factors and adjusted nominal currents based on ambient temperature. kombinirano zaščitno stikalo izklopna karakteristika temperatura okolice bimetalni disk prenos toplote korekcijski faktor residual current circuit breaker with overcurrent protection tripping characteristic ambient temperature bimetallic disc heat transfer correction factor true false false Slovenski jezik Angleški jezik Zaključna naloga 2024-11-29 07:30:06 2024-11-29 07:30:10 2025-01-20 12:43:45 0000-00-00 00:00:00 2024 0 0 XX, 43 str. 2024 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 536.2:620.172.251(043.2) 270178 223114499 38425.pdf 38425.pdf 1 2878DC52C44012F87C5811B09BB6535F 8eabb3c738d63037a9c1152ed71d0651ac44dfa3fdae6ef8cd57d5e019edd314 f740a49c-ae1a-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=196342 Fakulteta za strojništvo 0 0 0