Short circuit fault current and current limiting devices


 Product(s):Hevacomp Electrical Designer - Connect
 Version(s):V8i (N/A)
 Environment:N/A
 Area:N/A
 Subarea:N/A

Problem

As part of the cable sizing calculation, short circuit fault currents are calculated. These figures can be adjusted if current limiting devices are employed.

Solution

Short circuit fault currents are calculated using the methods described here

In cases where current limiting devices are employed, the short circuit fault current is compared to the current limiting curve (interpolated) and the appropriate limited current is used instead.

 It should be noted that "Amps OUT" column is displaying Peak current. These are converted to RMS by the software.