Fc2 mobile app quickly delivers fault current calculations in the palm of your hand. See note under step 3 of basic pointtopoint calculation procedure. Bussmann series fc2 calculatorfault current calculation. Transformer short circuit fault current calculator jcalc. Short circuit current calculations cooper industries. An opencircuit condition is known as a series fault. An easy way to calculate prospective shortcircuit current levels.
See also the full cable sizing calculator asnzs3008. Fault current calculations are a critical piece of the electrical designengineering puzzle for electrical distribution systems in commercial and industrial installations. Also known as a shortcircuit current, a fault current is a term used to describe a situation in which the flow of current that is traveling through an electric circuit is not within a normal range. With a simple system, it is sometimes possible to identify the origin of the problem by making a simple inspection of the wires that make up the system. The available fc will be reduced as shown in the calculations when the fault current value at the primary of the transformer is reduced. Mar 31, 2020 pfc fault current calculator for android, calculate to or from pfc, voltage or earth loop impedance. The prospective shortcircuit current pscc is the maximum current that can flow through a shorted electrical circuit. Easy and simple methods for calculating short circuit curr.
Where protective devices do not have sufficient breaking and for a circuitbreaker making capacity to cope safely with such fault currents there is a risk of injury or damage from electrical arcing and even fire. In 1974, mike realized there was a need for quality electrical training and opened mike holt. Circuit prospective fault current calculator, pfc calculator for iphone and ipad. Calculate the prospective fault current from the zs or ze value. Short circuit current calculator electrical engineering portal. Jan 30, 2020 prospective fault current calculator for android, brand new version for 2020 v. Once the fault currents have been calculated, you can then select.
Short circuit analytic sca software and mobile apps perform available short circuit fault current calculations in threephase electric power systems you are working with. Prospective fault current i pf is the value of overcurrent that would flow in the event of a shortcircuit or an earth fault occurring in an electrical installation. Circuit prospective fault current calculator, pfc calculator for iphone and. In this way, it automatically applies the coefficients and factors of the ansi and iec standards, compares the results with the data published by manufacturers and also emits alarms and warnings when the devices exceed their capacity. The prospective shortcircuit current and the fault level power. Apr 19, 2012 what i need to know is can the prospective fault current be calculated from ze.
Fault current calculations are based on ohms law in which the current i equals the voltage v divided by the resistance r. Calculate the shortcircuit current at the secondary of the transformer. Have a browse around the electrical apps, join our electricians forum, have a. Specify the prospective fault current of the switchboard that the load is supplied from.
Fault current, or shortcircuit current, that is the question. Volts voltage zs, ze or zdb ohms pfc prospective fault current ka pefc prospective earth fault current ka pscc. Check, verify or calculate the circuit prospective fault current pfc. Pfc fault current calculator for android, calculate to or from pfc, voltage or earth loop impedance. If the infinite method is applied when calculating fault current. Select a standard cable size in mm 2 as defined in asnz 3008. The transformer fault level calculator assumes that the transformer is supplied from an infinite bus. As discussed previously, fault current and shortcircuit current are interchangeable. Dc short circuit software dc short circuit analysis etap. This amount of fault current varies based upon the source of power and where the shortcircuit condition is created. In other words, the fault level on the primary side of the transformer is considered to be infinite. Pfc fault current calculator, calculate pfc from voltage and zs ze or zdb.
The values obtained should be compared against the relevant installation design criteria to con. Also, remember that pfc is the highest figure of pefc prospective earth fault current line to earth or pssc prospective short. 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. Calculate the pfc from the zs or ze and voltage value. 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. These values can be calculated on the load side of a transformer, at the end of a run. The programs take into consideration all of the key electrical parameters of power distribution system including power supply, cables, transformers, motors and generators. Fault calculation methods university of new south wales.
Actual prospective fault current must be calculated as any attempt to measure anything involving more than one phase, or a system that is solidly grounded, will result in injury, death, and destruction. An electromagnetic force is calculated with the peak ampacity value ipk. Input the nameplate transformer impedance as a percentage, not a decimal i. Everything you need to know about calculating fault currents, you learned in circuits 101, trigonometry, and basic math classes. Therefore, the circuits supply voltage and its impedance determine the pscc value. Pfc prospective fault current calculator, calculate the ka pfc fault current from the other known units of voltage and zs, ze or zdb values. The higher reading of the two you then record as the prospective fault current pfc. The bussmann series pointtopoint shortcircuit current calculator is a simple, easytouse program that allows you to calculate prospective shortcircuit currents. Check, verify or calculate the circuit prospective fault current pfc pscc pefc. The cooper bussmann pointtopoint shortcircuit calculator is a simple, easytouse program that allows you to calculate prospective shortcircuit. The available fault current, prospective shortcircuit current pscc, or shortcircuit making current is the highest electric current which can exist in a particular electrical system under shortcircuit conditions. Home download center electrical software short circuit current calculator calculate prospective shortcircuit current levels 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. Circuit prospective fault current electrical calculator.
Before starting fault current calculation, you will have to choose between step 1a and step 1b which are explained below. Fault current, or shortcircuit current, that is the. Download32 is source for fault current calculation shareware, freeware download fault current calculator, popcalc pro calculator, design master electrical, powernet, electrc 2008, etc. A power system functions normally until after the occurrence of a fault in the system. 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. In more complex systems where the wiring is encased and may run. On a single phase installation fault conditions can either be prospective earth fault current pefc line to earth or prospective short circuit current pssc line to neutral. Fault current calculator for android devices, calculate to or from pfc, voltage or earth loop impedance. Oct 21, 2019 the prospective shortcircuit current pscc is the maximum current that can flow through a shorted electrical circuit. Calculate pfc fault current ka from the voltage and ze or zs earth loop impedance values. You will find sheet with very nice example already fulfilled. Fault current calculator pfc for android free download.
Sep 11, 2018 in this video, electrical fault level calculation for short circuit faults is shown. For example, a 75kva transformer with a 208y120 secondary and 5% impedance has a capacity of 208 amps on the secondary. Either by enquiry, measurement or calculation, prospective fault current ipf should be determined at every relevant point within an installation regulation 434. The peak let through with an infinite source worst case scenario would have 208 0.
The prospective shortcircuit current pscc, available fault current, or shortcircuit making current is the highest electric current which can exist in a particular electrical system under shortcircuit conditions. Fc 2 mobile app quickly delivers fault current calculations in the palm of your hand. When there is a short circuit the resistance becomes very small, and that means the current becomes very large. Number of cables per phase p conductor temperature. Note that this assumption will give the worse case fault level on the secondary side of the transformer. Calculate prospective fault current ka from the voltage and zs or ze. The good news is fault events can be minimized or avoided through diligent electrical design, accurate record keeping information on equipmentdevicesmotors. Calculates the short circuit fault current level of a transformer on an infinite bus. 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. To assure the safe operation of direct current dc systems, a dc short circuit analysis must be carried out to evaluate system conditions under a fault and assess protective device ratings. A fault condition occurs when one or more electrical conductors short to each other or to ground. Cctv and security systems the electricians arms trade price checking business related central heating systems electricians software electricians. The fault types are phase to ground, double phase to ground, three phase to ground, phase to phase and three phase.
The conclusion is that you need to know the fault current value in a system to select and install the correct overcurrent protective devices ocpd. Short circuit calculation spreadsheet laobing kaisuo. Prospective fault current i pf is the value of overcurrent that would flow in the event of a shortcircuit or an earth fault occurring in an electrical installation where protective devices do not have sufficient breaking and for a circuitbreaker making capacity to cope safely with such fault currents there is a risk of injury or damage from electrical arcing and even. In 1974, mike realized there was a need for quality electrical training and opened. Software calculator, and then installing the right type and number of busbar supports to withstand a prospective fault current. The prospective shortcircuit current psc, pscc is the maximum current that can flow through a shorted electrical circuit. After seeing this video, concept of fault level calculation for given single line diagram will be cleared. These values can be calculated on the load side of a transformer, at the end of a run of cable or at the end of a busway. Download fault current calculator and enjoy it on your iphone, ipad and ipod touch. Yes, it would be the same, but more specifically le is the prospective earth fault current pefc. How do you calculate the maximum possible available fault. Icc rms is not used to calculate the electromagnetic force.
Fault current calculator pfc for android free download and. Transformer short circuit current calculation and solutions. Available fault current calculator excel spreadsheet engineers. A fault current is an unintended, uncontrolled, high current flow through an electrical system.
The ln fault current is higher than the ll fault current at the secondary terminals of a singlephase centertapped transformer. Available fault current calculator excel spreadsheet. This type of abnormal or unusual flow of current can be caused by a number of different issues, including a shortcircuit of electrical equipment or some defect that is. Pscc is also known as available fault current or shortcircuit making current. Fault currents are caused by very low impedance short circuits.
Makes pointtopoint fault current calculations easy. 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. Specify the estimated cable length in meters of feet. Prospective fault current ipf is the general term used for the highest amount of current that will flow under fault conditions. The cooper bussmann pointtopoint shortcircuit calculator is a simple, easyto use program that allows you to calculate prospective shortcircuit. Easily calculate available fault current anytime, anywhere. Electrician apps electrical software cable calculator.
W ith mobile technology improving at lightning speeds harness the power of your mobile device, look up a max zs value in an instant, carry out a quick cable size calculation or a prospective fault current conversion or even complete your electrical test certificates with the convenience of having all the. I notice on test sheets your required to note down the pfc, but not short circuit or earth fault current, although its a requirement of bs7671 reg 612. Circuit prospective fault current calculator, pfc calc. Because they have low impedance systems, low voltage electrical systems, such as those in buildings, generate very high levels of fault currents. It is determined by the voltage and impedance of the supply system. What i need to know is can the prospective fault current be calculated from ze. Calculates pfc fault current ka from the voltage and ze or zs earth loop impedance values. A fault current calculation determines the maximum available current that will be available at a given node, or location, in the system. Pfc fault current calculator for android version 1. Have a browse around the electrical apps, join our electricians forum, have a read of our electrical blog or catch up on our latest news. Hi guys how do you calculate prospective fault current. He was a journeyman electrician, master electrician, and electrical contractor. If the resistance was zero, then the calculated fault current would go to. Basically does this mean this tester isnt suitable for modern requirements.
Prospective fault current calculator for android, brand new version for 2020 v. Calculate the prospective shortcircuit current or pscc. Apr 17, 2020 the process of locating a fault current will vary slightly, depending on the overall construction of the wiring system involved. Use prospective fault current tester or select the pfc function of a multifunctional tester such as the megger 1553, and make sure that the supply is on, but the main switch is in off position. The fault current is the electrical current which flows through a circuit during an electrical fault condition. Sample fault current calculations help contractors understand the source of power flow problems. Volts voltage zs, ze or zdb ohms pfc prospective fault current ka pefc prospective earth fault current ka pscc prospective short circuit current ka. Prospective fault current test the illustrated guide. Cable short circuit fault current calculator asnzs 3008. Supply voltage 400v 50hz xc and rc values based on asnz3008. How do you work out the prospective fault current of a. Specify the voltage and select the phase arrangement. Fault current calculator pfc for android apk download. In this video, electrical fault level calculation for short circuit faults is shown.
Figure 1 illustrates a simple singleline diagram that very well could be your basic service entrance for a commercial or industrial installation. Harness the power of your mobile device with a smart electrical app. Download fault current calculator free trial circuit. Welcome to pro certs software, the home of electrical software and apps. Once the fault currents have been calculated, you can then select overcurrent. Etap dc short circuit analysis software evaluates system fault conditions and assesses protective device ratings for dc systems. John sokolik and it represents an easy way to calculate fault current by entering few values in indicated fields. The available fault current, prospective shortcircuit current pscc, or shortcircuit making current is the highest electric current which can exist in a particular. Singlecore trefoil singlecore flat touching multicore circular conductors multicore shaped conductors.