Elplek

Calculates all currents in a network in the case of different faults(three phase fault, line to line fault, line to Earth fault, line to line to earth fault).The initial short circuit currents Ik" can be calculated either using the superposition method, or according to the IEC 60909 standard ( IEC with some minor limitations. The steady state current Ik is not calculated, for example.)The prefault state for the superposition method can be taken from a load flow calculation, or from a straightforward solution of the network. If the initial state is calculated with the superposition method, then the currents are calculated as a function of time after the occurrence of the fault. In addition, the activation of Protection relays is displayed. For- Easy to use (my subjective view ! )- Initial short circuit current with the superposition method, or according to IEC 60909- Calculates currents as a function of time (not in IEC-calc.)- Shows the activation of overcurrent protection relays and distance relays (not in IEC-calc.)- different protection relays available: definite time, inverse time,combined phase,ground, sequence (PGQ), electromechanical,user defined, distance l- Several tens of overcurrent relay curves programmed in (IEC, ANSI,ABB, Westinghouse, English Electric, etc)- Phasor display of currents and voltages- Contains a simple relay coordination graphics PaGE- When using the superposition method, the prefault state can be taken from a load flow calculation- Can produce the input file (*.dat file) for the Microtran (EMTP) transient simulation program (tested only with the student version)- Can produce the input file (*.atp file) for the ATP transient simulation program- Handles both radiaL and meshed networks