Calculation Example using Arc-Flash-Analytic v 4.1 based upon the IEEE 1584 Empirical Model

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Consider 600V grounded switchgear with a 20mm gap between conductors and 70 kA prospective 3-phase bolted fault current at its terminals. The gear is being protected by AJT 200 Class J 200A fuse located upstream. Incident Energy at working distance of 500mm, Flash Protection Boundary and Personal Protective Equipment (PPE) Category will be calculated based on IEEE 1584 Guide for Performing Arc-Flash hazard Calculations.

 

Spend $400 or more on ARCAD stocked products and get Arc Flash Analytic 4.1 software FREE Must mention ESAVINGS promotional code in comments field upon checkout or by email to sales@arcadvisor.com The Arc Flash Analytic v4.1 is now available by mail in CD format or via download from our web server. Please select your preferred media format from the drop down menu below. You can make the payment online using any major credit card or PayPal balance. We will send you the installation package and your unique registration key same day or day after you placed the order. We also accept Purchase Orders, Wire Transfer, Interac Email Money Transfer (Canada), International Money Orders and Certified Cheques. Price: US $270.00 Select Media CD format Download from webserver End User First & Last Names Company Name * - Shopping cart will open in new window Free Short Circuit Software included capable to: build comprehensive one-line diagrams save a system and open a previously saved system print out input, output values and one-line diagrams calculate minimum and maximum available short-circuit currents. More Information

First, we start with specifying Equipment Class, Gap between Conductors, Grounding Type, Working Distance, Available 3-Phase Bolted Current and System Voltage:

By hitting [Next] button, Predicted 3-phase Arcing Current and Arcing Current Reduced by 15% will be calculated. In our example they equal to 50.05 and 42.54kA respectively. At this point, arc duration both at the predicted and at the reduced arcing current should be specified. Using published manufacturer AJT200 fuse time-current characteristic ( see below ), we find that both predicted and reduced arcing fault currents are well above the total clearing time at the bottom of the curve (0.01 seconds).

Therefore ( as per IEEE 1584 Guide ) 0.01 seconds is used for the time both for Predicted Arcing Current and the Arcing Current Reduced by 15%.

System Summary and Calculation Results screen will be displayed when [Next] button has been clicked on. The screen displays calculation results both for predicted and reduced by 15% Arcing Current with worst case scenario highlighted.

By pressing [Save Results] button, the results will be saved to a text file for future reference or printing. You can save results for different jobs under different names. By choosing Open from File menu ( see Figure 1 above) you can open an existing results file, inspect its current content, do simple editing operations including Cut, Copy and Paste to and from the clipboard, Save and Print.

If you need more complex editing, import the file into your favorite text manipulation processor ( MS Word as an example ) and do what you need to do.

Warning Label can be generated by pushing [Create Label] button ( see Figure 3 above) . The label can be saved on local drive and printed on system printer. The program allows to save generated warning labels in JPG, BMP or PDF electronic formats for ease of scaling them and printing multiple labels on standard label stock directly or from Word, Page Maker or other word processor. You will be able to assign unique Equipment Name for each label before you save them on hard drive.

You can click on Label from Options menu ( see Figure 1 above) to select label language (now available in English, French and Spanish) the equipment, arc flash hazards and creation date information displayed on warning label. You can also select label type (Color or Black and White) and add in few more lines of text information onto the label.

You can fine tune units of measurement for input and output data by clicking on Units from Options menu ( see Figure 1 above) . Metric (mm, Joules ), imperial units (inches, calories ), or even a mix of both, can be specified for Gap between Conductors, Working Distance, Flash Protection Boundary and Incident Energy.

New AFA v4.1 would also allow you to save equipment configuration for future referencing and analysis.

Click the image below to launch video

Electric Arc Flash Study using IEEE 1584 Empirical Model

Demonstrates arc flash analysis based on IEEE 1584 Empirical Model and its implementation in Arc Flash Analytic 4.1 computer program.

Check also arc flash video tutorials section for more arc flash video tutorials:

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