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Fault Levels


Overview of Fault Levels Calculation and Reporting


The term "fault level" refers to what magnitude of current (amps) will flow in an electrical circuit under the worst conditions i.e., a short is created between phase wires or phase to neutral or phase to ground. Usually the worst case is phase to phase which can result in the largest current flowing.  Your organization may refer to these calculations as 'fault current calculations'.

Whenever a schedule or diagram that displays the fault levels for any members of the panel trees is requested by the user, the fault levels are completely automatically freshly calculated by DraftLogic Electrical.


Calculation Method

DraftLogic Electrical uses the Cooper Bussmann method of fault level calculation, which includes accommodation for motor contributions to fault level.


Calculation Details

Each time the fault levels calculation is executed, a detailed log file is generated so that you can review the data behind the fault levels numbers.

A Small Clip of The Fault Levels Calculation Log
A Small Clip of The Fault Levels Calculation Log



Presentation of Results

The results of the fault levels calculations are shown on the Single Line Diagram, the Panel Schedules top section and in the block attributes of power tree members.


Fault Levels in kaic Shown On Single Line Diagram
Fault Levels in kaic Shown On Single Line Diagram



• Gets the project done faster by saving users a large number of complex calculations, an error in any one of which would ripple throughout the entire power tree (aka Single Line devices), keystrokes to enter data into the Panel Schedules / Single Line Diagram / Bill of Materials.

• Increases the appeal of the engineering firm’s work to its clients by allowing for accurate fault levels to be included in all deliveries.

• Save clients' money by specifying protective devices based on accurate fault levels calculations instead of skipping the calculations and estimating high to save time on the job but cost more for protective devices.