cid c5862d27775443e7cb274801d74df13ac08f413be3bc25ec0eaf5de0677cb437 · original · open access · via openalex
Title: Surface Average Temperature Measurement of Cu-W Contact Material Burning in CO2: Preliminary Study Authors: Yannan Zhou; James E. Humphries; Joseph William Spencer; Joseph Yan Venue: Plasma Physics and Technology Year: 2023 Canonical: doi:10.14311/ppt.2023.1.20 URL: https://doi.org/10.14311/ppt.2023.1.20 Collector: openalex OA: true ABSTRACT The surface average temperature and the electrode temperature distribution are key parameters to predict the electrode erosion. Experimental research on the arc erosion has been carried out in a model circuit breaker, in which CO2 is filled in the chamber and Cu-W is used as the contact material. The surface average temperatures of plug contact exposed to electric arc with sinusoidal currents of 5kA were determined by a high-speed pyroscope. In order to establish a relationship between the average temperature of the contact surface and current squared, the data statistics and fitting curves in the current-rising and current-falling stages were given. It has been found that there are two different types of arc erosion processes by comparing the temperature-current squared curves. In other words, the structure of contact surface and the electrode material change significantly after repeated arc erosions.