Calculation Example using Arc-Flash-Analytic v 4.1 based upon the IEEE 1584 Low Voltage Circuit Breaker Equations

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Consider 575V motor control centre and 20 kA prospective 3-phase bolted fault current at its terminals. The gear is being protected by molded case 200A rated circuit breaker (MCCB). 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 formulae for calculating arc flash energies ( Low Voltage Circuit Breaker Equations ).

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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.

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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.

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We start with specifying Working Distance, Available 3-Phase Bolted Current, System Voltage, breaker instanenous trip current and selecting Breaker Type. For cases where voltage is beyond 208 to 480 and 575 to 690V ranges, or available fault current and gap is outside the range of the model, the IEEE 1584 Empirically Derived Model can be applied and it is included in the Arc Flash Analytic v4.1 calculator.

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Figure 1 - Circuit Breaker Equations Front Screen

System Summary and Calculation Results screen will be displayed by hitting [Next] button.

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Figure 2 - Circuit Breaker Equations Results Screen

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 clicking on [Create Label] button. The label can be saved on local drive and printed on system printer. The program allows to save generated warning labels in JPG, BMP and 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.

circuit breaker equations label preview

Figure 2 - Label Preview

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

circuit breaker equations label options