Fault current calculation software

Easypower ansi shortcircuit software delivers intelligent, easytouse tools to. Complete a short circuit analysis of your installation in 1 minute. In this video, electrical fault level calculation for short circuit faults is shown. Arc flash calculation software and short circuit analysis. A fault current calculation determines the maximum available current that will be available at a given node, or location, in the system. Replacements that result in a higher possible fault current, than that of the existing equipment, shall be addressed to this department, prior to reconnection of existing service equipment. Create a perphase perunit equivalent circuit of the power system using either subtransient reactances if subtransient currents are needed or transient reactances if transient currents are needed. See instructions and impedance table on reverse side. Overstressed device alarms are displayed on the oneline diagram and included in short circuit analyzer and study reports. Once the fault currents have been calculated, you can then select overcurrent. An easy way to calculate prospective shortcircuit current levels.

Short circuit calculations solutions electrical software. Before starting fault current calculation, you will have to choose between step 1a and step 1b which are explained below. Easily calculate available fault current anytime, anywhere. For instance, if a linetoline fault occurs 50 feet from a transformer, then 100 feet of cable impedance must be included in the calculation. Im looking for software for fault current or short circuit calculations. A mobile app and webbased application to make shortcircuit current calculations and help you determine if your equipment installation is compliant with the. The program takes into consideration electrical parameters of the power supply as well as the power distribution system including utility, cables, bus ducts, transformers, generators, motors etc. Cable short circuit fault current calculator asnzs 3008. For low voltage systems, the calculations are the same except for two items.

He was a journeyman electrician, master electrician, and electrical contractor. The program takes into consideration electrical parameters of the power supply as well as the power distribution system including utility, cables, bus ducts, transformers. You will find sheet with very nice example already fulfilled. Iec shortcircuit short circuit calculation software easypower. Insert the the kva rating power factor pf and impedance z of the transformer is not required to continue. Arc blast calculator spreadsheet to calculate arc blast in accordance with nfpa 70e conductor sizing spreadsheet for parallel applications capacitor kvar calculator spreadsheet to determine capacitor kvar required to improve power factor pf. What would be the available fault current at the service if the service entrance conductors are only 80 feet instead of 95.

What is the difference between a comprehensive study and a. In other words, the fault level on the primary side of the transformer is considered to be infinite. Bussmann series fc2 calculatorfault current calculation. Why risk of paying more than you have to for your fuse. Available fault current afc calculations are most often performed by using fault current calculating software or spreadsheets that automatically calculate the. Short circuit analytic sca software and mobile apps perform available short circuit fault current calculations in threephase electric power systems you are working with. Fc2 mobile app quickly delivers fault current calculations in the palm of your hand. Electrical calculation tools is a set of 7 computer aided online tools designed to help you. The inherent secondaryfault current for a 204050mva, 115kv, 8%impedance transformer would be.

Continue these steps until each panel has been addressed or the fault current is below the minimum equipment rating. To calculate the fault current in a system it is first necessary to calculate the mva during a fault. Etap short circuit software makes it easy to go from selecting elements, from the comprehensive library of short circuit current ratings, to performing dozens of different types of short circuit analysis. Initial shortcircuit current, maximum asymmetrical fault or peak current, breaking fault current and steadystate fault current. Calculate the shortcircuit current at the secondary of the transformer.

The iec60909 shortcircuit calculation adheres to the international iec60909 guidelines and supports fault current calculations for threephase radial or meshed ac networks. Fault current calculation software fill out and sign. Short circuit fault current calculation example electric arc. Therefore, the bolted fault current is considered to be the maximum fault current you would have at that point in the system. Electrical formulas electrical training solutions mike. Perform device duty calculations using etaps short circuit analysis software which allows you to determine fault currents and automatically compare these. Smartduty, an expert system included with shortcircuit, compares each equipment rating with the calculated fault duties, highlighting any problem areas on the oneline and providing a tabular report showing the equipment data, the available fault current, and the critical problem areas. Note that this assumption will give the worse case fault level on the secondary side of the transformer. The cooper bussmann pointtopoint shortcircuit calculator is a simple, easytouse program that allows you to calculate prospective shortcircuit currents with a reasonable degree of accuracy.

Symmetrical fault current calculations to determine the fault current in a large power system. Perform device duty calculations using etaps short circuit analysis software which allows you to determine fault currents and automatically compare these values against manufacturer short circuit current ratings. Calculation tools for low voltage electrical network. It can simultaneously handle a main distribution transformer, service lateral, second transformer, up to 40 mainfeeders, with 8 mainfeeders having 40 subfeeders for a total of 360 nodal points.

This calculation module allows you to quickly calculate fault currents for a complete radial system. In 1974, mike realized there was a need for quality electrical training and opened mike holt. This is basically a combination of the steps in the perunit calculation method. See note under step 3 of basic pointtopoint calculation procedure. Comply with ansi, nfpa 70e, nema, and nec standards and regulations. The transformer short circuit current is calculated as follows. This amount of fault current varies based upon the source of power and. Shortcircuitanalytic sca software performs available fault currents calculations in threephase electric power systems you are working with. The calculation of fault current can then be very easily done by applying this theorem after obtaining the open circuit emf and network impedance as seen from the fault point. We use the cdegs engineering software from ses technologies. This section is dedicated to tools every electrical engineer can use in daily work.

Short circuit current calculations cooper bussmann. As discussed previously, fault current and shortcircuit current are interchangeable. Fault current, or shortcircuit current, that is the. Hand calculations are rarely accepted by authorities these days. In this situation, we assume cable length to be minimal and therefore neglect its. Calculate pfc fault current ka from the voltage and ze or zs earth loop impedance values. The infinite bus calculation method is generally not suitable for use with arc flash studies since a lower short circuit current could result in the overcurrent protective device taking longer to operate resulting in a greater incident energy exposure. Short circuit current calculations cooper industries. Fault current calculation software downloads page 2. The comprehensive fault follows a traditional ohms law calculation for fault current. Where the system peak fault current and the cable diameter are known, the formula featured in the below article, excerpted from the international standard iec 61914, can be used to calculate the forces between two conductors in the event of a 3 phase fault in order to specify the correct type of cable cleats. Dc short circuit software dc short circuit analysis etap. Up to date with schneider electric low voltage protection devices and circuit breakers.

E electrical power and arc flash training programs for over 30. Computation of shortcircuit current at all nodes, or computation of the effect of a fault applied at a given location. How to calculate fault current in electrical substation. Download32 is source for fault current calculation shareware, freeware download assamcalcu. Download32 is source for fault current calculation shareware, freeware download fault current calculator, popcalc pro calculator, design master electrical, powernet. Specify the voltage and select the phase arrangement. Etap dc short circuit analysis software evaluates system fault conditions and assesses protective device ratings for dc systems.

Transformer short circuit fault current calculator jcalc. The labeling of available fault current is not a part of arc flash labeling and a separate label is typically used. Mike holt worked his way up through the electrical trade from apprentice electrician through electrical contractor, to become one of the most recognized experts in the world as it relates to electrical power installations. All the equipments should be rated to withstand this current. An opencircuit condition is known as a series fault.

Fault current calculations are based on ohms law in which the current i equals the voltage v divided by the resistance r. Electrical calculation software free downloads and. These spreadsheets below will make your job much more easier, alowing you to shorten the time used for endless calculations of cables, voltage drop, various selctions. The available fault current is also known as the short circuit current. Ansi shortcircuit short circuit calculation software. Input the nameplate transformer impedance as a percentage, not a decimal i. Verify equipment duty ratings instantly on the oneline. The elite software short circuit calculation dos based program is a. Short circuit analytic sca software and mobile apps perform available short circuit fault current calculations in threephase electric power systems you are. Analyzers, plots and reports allow for quick determination of the worstcase fault current device duty. The ln fault current is higher than the ll fault current at the secondary terminals of a singlephase center. Fc 2 mobile app quickly delivers fault current calculations in the palm of your hand. Eatons bussmann series fc2 available fault current calculator application is an innovative tool developed for contractors, engineers, electricians, and electrical inspectors. The transformer fault level calculator assumes that the transformer is supplied from an infinite bus.

Short circuit analysis short circuit software etap. Faster than the heavy full features electrical network calculation software. Or if you have the available fault current, either given to you from utility, or if you are using this program to calculate fault currents at other parts of the system where the aic ampere interrupting capacity is known, input this number and it will automatically override the. A protective device is appropriate for the application if its secondaryfault interrupting rating is equal to or greater than the value for i calculated above. These values can be calculated on the load side of a transformer, at the end of a run of cable or. It is the maximum current available should there be a short circuit, such as a ground fault, that could cause an arc flash. The calculator calculates the short circuit fault current at a specified distance in a cable run, based on the source short circuit fault current level. Short circuit fault current calculations software and.

Short circuit current calculation at various point of. Makes pointtopoint fault current calculations easy. A programmable allpurpose calculator, mitcalc, mitcalc bolted connection, mitcalc rolling bearings calculation i, mitcalc shafts calculation, etc. When there is a short circuit the resistance becomes very small, and that means the current becomes very large. Short circuit analytic calculation example the example below explains how to build a single line diagram of the power distribution system using shortcircuitanalytic version 1. John sokolik and it represents easy way to calculate fault current by entering few values in. The following fault current calculation form must be completed and submitted prior to service approval. The programs take into consideration all of the key electrical parameters of power distribution system including power supply, cables, transformers, motors and generators. John sokolik and it represents an easy way to calculate fault current by entering few values in indicated fields. See also the full cable sizing calculator asnzs3008. If we compare the infinite bus calculation and that which included the source impedance of the utility available fault current of 50,000 amps we see that the available shortcircuit current dropped from 31,378 amps to 29,259 amps, a 6. The reason bolted fault current is used is because any impedance in the faulted current path will reduce the amount of current that will flow. Insert available fault current ampere rating from your local utility step 1b.