Experimental studies of microarcs between copper electrodes in atmospheric pressure air - DatasetLow direct current arcs generated between Cu electrodes in atmospheric pressure air are investigated in relation to low-voltage switching. Electrical and optical measurements and high-speed imaging give insight into the dynamics of the arc. Side-on spectroscopy with a grating spectrometer and suitable optical imaging delivers spatially resolved spectral emission coefficients of three emission lines of the Cu atom. The experimental findings are compared with results from modelling.

]]>contact openingdiagnosticsswitchingThermal Plasma Technology61406e63-8d71-4d28-a99e-6865c18077fe2025-09-12T00:00:00+02:002025-09-16T08:14:12+02:00enINP, IEEExperimental studies of microarcs between copper electrodes - Fig. 2 (OES 510.6 nm)Related to Figure 2 of the paper: Intensities I(y) of the CuI line at 510.6 nm for each side-on position y. The intensities were measured at a distance of 300 μm from the anode for a gap distance of 3 mm and DC current of 2 A.

]]>2025-08-20T14:36:30+02:002025-09-16T08:14:12+02:00text/csvcsv695https://www.inptdat.de/dataset/experimental-studies-microarcs-between-copper-electrodes-atmospheric-pressure-air-dataset-0Experimental studies of microarcs between copper electrodes - Fig. 2 (OES 515.3 nm)Related to Figure 2 of the paper: Intensities I(y) of the CuI line at 515.3 nm for each side-on position y. The intensities were measured at a distance of 300 μm from the anode for a gap distance of 3 mm and DC current of 2 A.

]]>2025-08-20T14:37:28+02:002025-09-16T08:14:12+02:00text/csvcsv451https://www.inptdat.de/dataset/experimental-studies-microarcs-between-copper-electrodes-atmospheric-pressure-air-dataset-1Experimental studies of microarcs between copper electrodes - Fig. 2 (OES 521.8 nm)Related to Figure 2 of the paper: Intensities I(y) of the CuI line at 521.8 nm for each side-on position y. The intensities were measured at a distance of 300 μm from the anode for a gap distance of 3 mm and DC current of 2 A.

]]>2025-08-20T14:38:21+02:002025-09-16T08:14:12+02:00text/csvcsv451https://www.inptdat.de/dataset/experimental-studies-microarcs-between-copper-electrodes-atmospheric-pressure-air-dataset-2Experimental studies of microarcs between copper electrodes - Fig. 2 (Fit)Related to Figure 2 of the paper: Fits of the measured intensities of CuI lines at 510.6 nm (labeled as I1), 515.3 nm (labeled as I2), and 521.8 nm (labeled as I3) for each side-on position y. The intensities were measured at a distance of 300 μm from the anode for a gap distance of 3 mm and DC current of 2 A.

]]>2025-08-20T14:39:10+02:002025-09-16T08:14:12+02:00text/csvcsv9734https://www.inptdat.de/dataset/experimental-studies-microarcs-between-copper-electrodes-atmospheric-pressure-air-dataset-3Experimental studies of microarcs between copper electrodes - Fig. 2 (Epsilon)Related to Figure 2 of the paper: Emission coefficients for the 510.6 nm (labeled as e1), 515.3 nm (labeled as e2), and 521.8 nm (labeled as e3) lines from Abel inversion of the fitted intensities for each radial position r. The intensities were measured at a distance of 300 μm from the anode for a gap distance of 3 mm and DC current of 2 A.

]]>2025-08-20T14:39:58+02:002025-09-16T08:14:12+02:00text/csvcsv5050https://www.inptdat.de/dataset/experimental-studies-microarcs-between-copper-electrodes-atmospheric-pressure-air-dataset-4Experimental studies of microarcs between copper electrodes - Fig. 3Related to Figure 3 of the paper: Radially averaged number density of excited levels 42D3/2, 42D5/2, and 42P3/2, at different distances from the cathode from experiment and modelling of the arc for a gap distance of 3 mm and DC current of 2 A.

]]>2025-08-20T14:41:23+02:002025-09-16T08:14:12+02:00text/csvcsv844https://www.inptdat.de/dataset/experimental-studies-microarcs-between-copper-electrodes-atmospheric-pressure-air-dataset-5Experimental studies of microarcs between copper electrodes - Fig. 4Related to Figure 4 of the paper: Dual imaging with spectral filters for Cu I and O I emission lines at two instants 33 and 34 ms after contact separation for an arc at 2 A – the gap distance is 1.5 mm. The cathode is on the right hand side. The images measure 1.40×1.55 mm, the acquisition time is 1 ms.

]]>2025-08-20T14:42:54+02:002025-09-16T08:14:12+02:00image/pngpng137902https://www.inptdat.de/dataset/experimental-studies-microarcs-between-copper-electrodes-atmospheric-pressure-air-dataset-6Experimental studies of microarcs between copper electrodes - Fig. 4-5 (video)Related to Figures 4 and 5 of the paper: Video file of the dual imaging with spectral filters for Cu I and O I emission lines for an arc at 2 A.

]]>2025-08-20T14:44:02+02:002025-09-16T08:14:12+02:00video/mp4mp477135https://www.inptdat.de/dataset/experimental-studies-microarcs-between-copper-electrodes-atmospheric-pressure-air-dataset-7Experimental studies of microarcs between copper electrodes - Fig. 5 (intensity)Related to Figure 5 of the paper: Arc intensity (dimensionless) of the Cu I line at 515 nm and the O I line at 777 nm during the contact opening for an arc at 2 A. The contact separation starts at t=0. The arc intensities were obtained by axial and radial averaging of the filtered high-speed images.

]]>2025-08-20T14:45:23+02:002025-09-16T08:14:12+02:00text/csvcsv4589https://www.inptdat.de/dataset/experimental-studies-microarcs-between-copper-electrodes-atmospheric-pressure-air-dataset-8Experimental studies of microarcs between copper electrodes - Fig. 5 (voltage)Related to Figure 5 of the paper: Voltage during the contact opening for an arc at 2 A. The contact separation starts at t=0.

]]>2025-08-20T14:48:48+02:002025-09-16T08:14:12+02:00text/csvcsv14399https://www.inptdat.de/dataset/experimental-studies-microarcs-between-copper-electrodes-atmospheric-pressure-air-dataset-9Experimental studies of microarcs between copper electrodes - Fig. 6 (measurements)Related to Figure 6 of the paper: Measured arc voltage during the contact opening for an arc at 2 A (Four examples are given, where the voltages v1...v4 belong to the time scales t1...t4).

]]>2025-08-20T14:50:16+02:002025-09-16T08:14:12+02:00text/csvcsv2532946https://www.inptdat.de/dataset/experimental-studies-microarcs-between-copper-electrodes-atmospheric-pressure-air-dataset-10Experimental studies of microarcs between copper electrodes - Fig. 6 (model)Related to Figure 6 of the paper: Results of the model for the arc voltage for gap distances correspoinding to the contact opening. Results for the three Cu mole fractions xCu=0.01, xCu=0.005, and xCu=0.002 in the air-Cu mixture are incliuded. The contact separation starts at t=0.

]]>2025-08-20T14:51:14+02:002025-09-16T08:14:12+02:00text/csvcsv391https://www.inptdat.de/dataset/experimental-studies-microarcs-between-copper-electrodes-atmospheric-pressure-air-dataset-11DKANhttps://www.inptdat.de