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We help facilities create safer working environments for individuals who service electrical systems by providing novel on-line and PC based tools for short circuit and arc flash hazard analysis. Our service includes resources and tools allowing you to perform the analysis yourself. ArcAd's short circuit online calculator features input data analysis and hard coded error propagation rules ensuring that the results are not more precise than justified by the accuracy of input data.Typical commercial software has more interfaces and graphic content, which make them more appealing and expensive. ArcAd's on-line tool is user friendly, performs error propagation analysis - very important but widely ignored issue, and is offered at a reasonable price .

A Handbook to Accompany the Online Short-Circuit Calculation Program
This program, other programs, or hand calculation can be used to perform short-circuit calculations. Any method used requires specific data on the power distribution system. All this data is converted to short circuit MVA values (SC MVA) for each component in the system. This paper describes the data needed for each type of circuit component and how to obtain the data. It also describes method and advantages of using the online short circuit program to calculate available short-circuit currents.

Arc-Flash-Analytic v 1.1 Calculation Example with Screen Views
Step by step arc flash hazards analysis featuring low voltage protected by current limiting fuse. Incident Energy, Flash Protection Boundary and Personal Protective Equipment (PPE) Category will be calculated based on IEEE 1584 Guide for Performing Arc-Flash hazard Calculations.

Short Circuit Analysis. Example 1
Shows how to create single line diagram of power distribution system, pre-assign a single short circuit MVA factor to each basic component within the power system based on the impedance it adds to the system, programm the one line diagram into short circuit calculator, run the analysis and interprete the results.

Short Circuit Analysis. Example 2
MVA method in simplified form and it's online short circuit calculator implementation is used to solve a problem taken from the California State Professional Engineer Registration Examination. The resulting short circuit current values are compared with the respective values calculated using ESA Easypower 7.0 . Positive, negative and zero sequence networks in SC MVA quantities are explained. Unbalanced line to ground, line to line etc. fault current values are determined based on the sequence diagrams. Bus admittance and impedance per unit matrix are presented and the results of per unit calculations are compared to the MVA method values obtained by running the online short circuit calculator.

Short Circuit Analysis. Example 3
MVA method is used to analyze medium size power distribution system taken from Easypower Demo. Positive, negative and zero sequence networks are developed and analized. Balanced three phase bolted and unbalanced short circuit current values are determined. The resulting short circuit current values are compared with the respective values calculated using ESA Easypower. Bus admittance and impedance positive and zero sequence per unit matrix are presented. Per unit and MVA methods are compared.

Short Circuit Analysis. Example 4
This example is a continuation of the short circuit analysis described in the example 3. System's radial representation in terms of database records is shown. The resulting short circuits contributed by upstream and downstream equipment are listed. The arc flash study is conducted using IEEE 1584 procedure from the IEEE 1584 Guide for Performing Arc Flash Hazard Calculations implemented in the online arc flash calculator presented on this web-site. Arc flash boundary, incident energy at specified working distance and risk category are determined.