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Network
After performance of an IEC 60909 calculation, results are shown on the basis of a View.
Only if an IEC 60909 calculation is carried out for one selected node can all supply branch and element currents be stated in the network.
The functionalities available with the menu item Results will be explained successively below.
General
With Calculate | Results | Survey an overview of the results for all nodes and branches for which an IEC 60909 calculation has been carried out will be displayed. The results are shown for nodes and branches in two lists.
Nodes
node Unom Sk" Ik" Ip Ri and Xi R/X |
Name of node Nominal voltage of the node Subtransient short-circuit power (Ik" * √3 * Unom) Subtransient short-circuit current Peak short-circuit current (kappa * √2 * Ik") network impedance at the node R/X ratio at the node |
Branches
name from to type tk max Ik"> Imax Ik"< |
Name Name of node Name of node Indicates whether the branch is a transformer Maximum admissible short-circuit time Maximum occurring short-circuit current in the branch with a fault close to the "From" node Maximum continuous short-circuit current, LV side (only stated with transformers) Maximum occurring short-circuit current in the branch with a fault close to the "To" node |
Details
Calculate | Results | Details is used to give detailed information on selected nodes and branches in a form.
If several nodes and/or branches are selected, Previous and Next can be used to show the other nodes and branches.
If no IEC 60909 calculation is carried out for the node, the fault symbol is absent, and only Unom is given for the node.
If an IEC 60909 calculation is carried out for a single node, all element and branch currents are given.
If no IEC 60909 calculation is carried out for the branch, the fault symbol is absent.
If an IEC 60909 calculation is carried out for only one node, the branch current is given in A.
With transformers, the greatest continuous short-circuit current Imax (LV-side) is also given. Imax may be less than Ik"> or Ik"<. The latter currents relate to the connecting cables of the transformer.
Graph node
Results | Graph | General can be used to display Ik" and Ip for the selected nodes and branches in a bar chart.
The nodes and branches in the graph are sorted as indicated.
At the end of the bar, the short-circuit current of the node or branch is listed when Marks is checked. The colour is taken from the current drawing colour.
If a bar of the bar chart is clicked, the object is selected and the screen focuses on the object.
Export
Almost all calculated results can be exported to Excel. In fact, the export is a fixed format report of all objects on two sheets: nodes and branches.
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