![]() The point of intersection corresponds to Short Time Pickup on Figure 3 above.įollow horizontal blue line until it intersects the vertical axis. The point of intersection corresponds to Instantaneous Trip Time on Figure 3 above.įollow vertical blue line until it intersects the horizontal axis. The point of intersection corresponds to Max Instantaneous Pickup on Figure 3 above.įollow horizontal orange line until it intersects the vertical axis. Sample Circuit Breaker Time-Current Characteristicsįollow vertical orange line until it intersects the horizontal axis. ![]() ![]() Click or button respectively and fill out the new device information form.įigure 4 below shows representative circuit breaker tripping curve.įigure 4. You can add device if it is not already included in build-in fuse or circuit breaker library. You can click on column headings in maintenance dialogue to sort the data by make, series, part number, current, voltage, I.R. With Evaluated option selected, the program will determine the amount of incident energy to second degree based on heat flux intensity and use that incident energy value to calculate arc flash boundary.Ĭlick on Library menu item and then select Fuses or Circuit Breakers to open up circuit protection device maintenance dialogue:įigure 2. Values withing the 0.3 cal/cm 2 to 4 cal/cm 2 range are accepted in this program version.įor exposures lasting less than 1 second the irradiance required for second degree burn at bare skin exposure would significantly increase as the duration of exposure decreased however it was shown that the amount of incident energy required to cause the burn would decrease. However, the Guide equation for arc flash boundary can be solved with other incident energy levels as well such as the rating of proposed personal protective equipment (PPE). The incident energy of 1.2 cal/cm 2 (5 J/cm 2) for bare skin is used in solving equation for arc flash boundary in IEEE 1584 Guide for Performing Arc Flash Hazard Calculations. With Preset option selected, enter a value in cal/cm 2 or Joules/cm 2 to determine arc flash boundary (AFB) distance at that incident energy. Save reports including equipment data, calculation results, warning label.īy clicking on Settings -> Incident Energy at AFB menu item, Preset or Evaluated incident energy at arc flash boundary can be selected.Perform analysis using metric, imperial units.Save input configuration, protection device information.Preview, save, print arc flash labels in high resolution graphic and PDF formats.*. ![]() Create warning labels in English and a variety of international languages.*.Set arc duration cut-off in the 2 to 10 second range.Add fuse and circuit breaker data including time-current characteristics for the devices that are not already featured in the built-in protection device library.Calculate initial arc blast explosion pressure and arc flash TNT (Tri-Nitro-Toluen) mass equivalent.Perform arc flash boundary calculations based on 1.2 cal/cm^2 (5 Joules/cm^2) onset energy to second degree burn for bare skin exposure per IEEE 1584 Guide and other incident energy levels as well, such as the rating of proposed personal protective equipment, or evaluated onset to second degree burn energy.Instantly determine arcing current, incident energy, arc flash, limited, restricted and prohibited shock approach boundaries, hazard risk category, typical clothing system.Ensure compliance with NEC, OSHA, NFPA 70E, IEEE P1584 and CSA Z462 standards and regulations.Detailed arc flash analysis using the IEEE 1584 2nd Edition year 2018 equations and the Lee method.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |