Arc flash assessment, hazard study and short circuit fault current calculation  
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AFA V4.1  AFA V5.0  AFA mobile  DCAFA V2.0 

Arc-Flash-Analytic v 4.1.2 software tool has been developed based on IEEE 1584 Guide for Performing Arc-Flash Hazard Calculations as an easy to use and comprehensive instrument for calculating arc incident energy and arc flash boundary, for determining limited, restricted, prohibited approach boundaries and hazard risk category required by NEC / CEC and OSHA when work is to be performed on or near the energized equipment. Also, the calculator allows one to calculate initial pressure generated by arc blast and arc flash TNT explosive equivalent.


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Arc Flash Analytic version 4.1.2 is now available by mail in disk format or via download from our web server. Please select your preferred media format from the drop-down menu below. Payments can be made online using Visa or MasterCard credit card or through PayPal. The installation package and the individual product registration credentials will be sent to you within 24 hours of placing your order. We also accept Purchase Orders, Wire Transfers, Interac Email Money Transfer (Canada), International Money Orders and Certified Cheques.

arc flash software cd v4.1 label

Price: US $220.00

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We offer money-saving bundles of programs. If you bundle Arc Flash Analytic (AFA V4.1) with ARCAD SCA V1.0 short circuit software program you will pay less than purchasing the software separately.

 

The IEEE 1584 empirically derived model was chosen for the analyzing arc flash faults due to the model's ability to accurately account for a wide variety of setup parameters: open and box equipment configurations, grounding of all types and ungrounded, gap between conductors of 3 to 152 mm., bolted fault currents in the range of 700A to 106kA, system voltages in the range of 208V to 15kV, and working distances. For cases where voltage is over 15kV or gap is outside the range of the model, the theoretically derived Lee method can be applied and is now included in the Arc Flash Analytic v4.1.2.

arc flash study empirical model main screen

Empirical Model - Main program screen.

When the IEEE 1584 Empirically Derived Model mode is activated, the calculator takes equipment configuration, gap between electrodes, grounding type, short circuit fault current value and system voltage on input, and determines arcing fault current at potential point of fault. Next, the incident energy, flash protection boundary and level of personnel protective equipment are determined based on equipment configuration, arc duration and working distance.

For protective devices operating in the steep portion of their time-current curves, a small change in current causes a big change in corresponding operating time. Incident energy is linear with time, and consequently arc current variations may have a big effect on incident energy. The IEEE 1584 proposed solution is to make two arc current and energy calculations: one using the calculated expected arc current and another one using a reduced arc current that is 15% lower.

arc flash study empirical model intermediate results

Empirical Model - Intermediate Results.

The calculator enables calculations for both of the above considered cases. The IEEE 1584 Empirically Derived Model procedure for system voltages less than 15kV requires that an operating time be determined for both the expected arc current and the reduced arc current. Incident energy is calculated for both sets of arc currents and operating times and the larger incident energy is taken as the model result. This solution was developed by comparing the results of arc current calculations using the best available arc current equation with actual measured arc current in the test database. The calculator predicts arcing fault current for a given configuration and bolted fault short circuit current. It also predicts bolted fault current required to cause 15% reduction of the predicted arcing current for the given configuration.

arc flash study empirical model final results

Empirical Model - Final Results.

It was found to be difficult to calculate incident energy in circuits protected by current-limiting fuses because of the reduced arc time and limited let-through current. Therefore, tests were conducted to determine the effect of current-limiting fuses on incident energy. Formulas for calculating arc-flash energies for use with current-limiting Class L and Class RK1 fuses have been developed. These formulas were developed based upon testing at 600 V and a distance of 455 mm (18in.) using one manufacturer's fuses but results with other manufacturers' fuses of the same class should be similar.

arc flash study fuse equations main screen

Main program screen with IEEE 1584 Fuse Equation mode selected.

Study has shown that in some cases a shortcut can be taken in analysis of the incident energy on equipment protected by upstream circuit breakers. AFA V4.1.2 contains the shortcut allowing a calculation of incident energy if the potential arc current falls in the instantaneous trip range of the circuit breaker. Equations have been developed for systems using low-voltage circuit breakers that will output values for incident energy and flash-protection boundary when the available bolted fault current is known or can be calculated. These equations do not require availability of the time-current curves for the circuit breaker.

arc flash study circuit breaker equations main screen

Main program screen with IEEE 1584 Low Voltage Circuit Breakers mode selected.

Arc Flash Analytic version 4.1.2 features estimate of incident energy exposures for live line work on overhead open air systems 1kV to 242kV

arc flash study phase to ground

Main program screen with NFPA 70E Phase To Ground Arcs in Open Air mode selected.

Benefits:

  • Calculator-style interface makes complex calculations easy to understand.
  • Provide a safer working environment by specifying the proper level of PPE. Wearing inadequate clothing is dangerous for obvious reasons, but wearing too much clothing is dangerous due to limited mobility and visibility.
  • Design safer power systems while insuring compliance with NEC 110.16, OSHA, NFPA 70E and IEEE 1584 standards.
  • Avoid potential fines, lost productivity, and increased insurance and litigation costs.
  • Save time by generating arc flash warning labels in electronic JPG, BMP and PDF formats
  • Create warning labels in English, French or Spanish languages
  • Customize labels by selecting and adding information displayed on them.
  • Save input configurations, calculation results for future reference or printing.
  • Perform analysis using metric or imperial units, or a mix of both
  • Calculate initial arc blast explosion pressure and arc flash TNT (Tri Nitro Toluen / Trotyl ) equivalent

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