【實用工具app】Sym Current|最夯免費app-綠色工廠好玩App

Calculating short-circuit currents in panelboard bus, taking into account the feeder and motors contribution; in accordance with ANSI IEEE Std 551-2006.Calculations based on the following assumptions:•Three-phase ac system, balanced, 60 Hz.•Three-phase bolted fault.•The values of short-circuit current are in terms of RMS symmetrical amperes.•Only considers the contribution of induction motors.•Motors contribution is on the basis of percentage of the total load.Specify the necesary data for:-The utility system.-The secondary unit substation transfomer-The feeder (allows conductors in parallel)-The load (total load and motors load in %)The app suggests typical values for short-circuit duty (MVA) and the X/R ratio of the utility system, also suggests the value of Z% for the transformer, but the user can specify the value of nameplate