Fault Current Waveform. The three phase fault current at busbar b2 is equal to 11 4 ka. Please note that the decaying exponential added to the sine wave causes the current to reach a much larger value than that of the sine wave alone.
Asymmetrical And Symmetrical Short Circuit Currents Definition And Basics Tutorial Transmission Lines Design And Electrical Engineering Hub from www.transmission-line.net
The 132 kv busbar three phase fault level is given by x thév. The amount of offset or asymmetry depends on the point when the fault occurs. October 2016 helmut lipp r d manager development electronics at ebm papst in mulfingen fault currents can be dangerous for people machinery and entire systems.
Then for a phase phase fault the current will be 0 866pu.
Most equipment and facilities have a typical load profile or waveform signature that defines the range of current magnitudes and power levels associated with normal operation. Figure below illustrates this phenomenon. Right after a fault occurs the current waveform is no longer a sine wave. A fault current s waveform is crucial to the selection of the right residual current circuit breaker also for ec motors.
