# ELEK Software > Electrical Power System Design & Analysis Software for Low Voltage and High Voltage installations. Specializes in cable sizing, earthing systems, arc flash calculations, and protection coordination to IEC, IEEE, AS/NZS, and BS standards. ## Core Products - [ELEK Software](https://elek.com): Electrical Engineering Calculations Software for Power Systems Design to International Standards for Low Voltage and High Voltage Electrical Projects. - [Electrical Engineering Software](https://elek.com/electrical-software): Electrical Power Systems Analysis and Design Software to IEC and IEEE Standards. SafeGrid Earthing, Cable High Voltage, Cable Pro Web Software. - [Cable Pro Web - AS3008](https://elek.com/electrical-software/elek-cable-pro-web): Cable sizing, voltage drop, circuit breaker selection, loop impedance, and maximum demand calculation software for AS/NZS 3008. - [Cable Pro Web - BS7671](https://elek.com/electrical-software/elek-cable-pro-web-bs7671): Automated electrical design software for compliance with BS7671 standards. Includes cable sizing, voltage drop, and circuit breaker selection. - [Cable HV Software](https://elek.com/electrical-software/elek-cable-high-voltage): Power cable current rating and ampacity calculations to IEC 60287 with validated accuracy. Supports transient and cyclic ratings, custom cables and installations. - [SafeGrid Earthing Software](https://elek.com/electrical-software/safegrid-earthing): Multilayer earthing system design software for electrical engineers. Calculates grid resistance, touch and step voltages, and lightning protection for substations. - [Power Bundle](https://elek.com/electrical-software/power-bundle): Comprehensive electrical design calculations software bundle for earthing systems design, high voltage and low voltage cable current rating calculations. - [Cable Pulling Software](https://elek.com/electrical-software/elek-cable-pulling): Calculate cable pulling tensions to determine required rating of hauling equipment and avoid damage to cables during installation. - [Protection Coordination Software](https://elek.com/electrical-software/protection-coordination): Electrical protection coordination studies software with manufacturer protective device time-current curve data and adjustable settings. - [Line Rate Software](https://elek.com/electrical-software/elek-line-rate): Calculate current rating of bare overhead line conductors based on conductor type, temperature, wind velocity, elevation and other factors. ## Free Online Calculators - [Free Electrical Calculators](https://elek.com/calculators): Online electrical calculators for cable sizing, voltage drop, earthing systems, lightning protection, arc flash calculations, and more. ### Cable Sizing Calculators - [Cable Sizing Calculator AS/NZS 3008](https://elek.com/calculators/cable-sizing-as): Calculate minimum active, neutral, and earth cable sizes complying with AS/NZS 3008.1.1 and AS/NZS 3000 for circuits up to 1,000V AC or 1,500V DC. - [Cable Sizing Calculator BS 7671](https://elek.com/calculators/cable-sizing-bs): Cable sizing calculator complying with BS 7671 IET Wiring Regulations for current-carrying capacity, voltage drop, and short-circuit performance. - [Cable Sizing Calculator IEC 60364-5-52](https://elek.com/calculators/cable-sizing-iec): Calculate cable sizes in compliance with international standard IEC 60364-5-52 for all cable types and installation methods. - [Voltage Drop Calculator AS/NZS 3008](https://elek.com/resources/free-electrical-calculators/voltage-drop-as3008): Accurate voltage drop calculator using AS/NZS 3008 equations considering cable resistance, reactance, operating temperature, and load power factor. ### LV Network Design Calculators - [Maximum Demand Calculator](https://elek.com/calculators/max-demand): Automatic maximum demand calculator for AS/NZS 3000 applying rules for installation types with automatic phase load balancing. - [Cable Pulling Tensions Calculator](https://elek.com/calculators/cable-pulling): Calculate cable pulling tensions, sidewall pressure, and required lubrication for safe cable installation in conduits or ducts. - [Fault Loop Impedance Calculator](https://elek.com/resources/free-electrical-calculators/fault-loop-impedance): Calculate earth fault loop impedance based on active and earth conductor impedances and protective device characteristics. ### Protection and Arc Flash Calculators - [Arc Flash Calculator IEEE 1584](https://elek.com/resources/free-electrical-calculators/arc-flash-ieee): Free IEEE 1584-2018 arc flash calculator for incident energy and boundary calculations to ensure electrical safety and PPE selection. - [IDMT Relay Tripping Time Calculator](https://elek.com/resources/free-electrical-calculators/idmt-relay-tripping-time-calculator): Calculate Inverse Definite Minimum Time relay trip times for IEC Curves, IEEE Curves, IAC Curves, and Rapid Inverse curves. ### Earthing and Grounding Calculators - [Touch and Step Voltage Calculator](https://elek.com/resources/free-electrical-calculators/touch-step-voltage-calculator): Calculate safe permissible touch and step voltage limits for designing earthing systems to IEEE Standard 80. - [Earth Rods Resistance Calculator](https://elek.com/resources/free-electrical-calculators/earth-rods-resistance-calculator): Calculate rod resistance for single or multiple rods in uniform soil, including resistance of electrodes encased in concrete. - [Earth Grid Conductor Sizing Calculator](https://elek.com/resources/free-electrical-calculators/earth-grid-conductor-size-calculator): Determine minimum earth grid conductor size based on short-time temperature rise limit per IEEE Std. 80-2013. - [Earthing Grid Resistance Calculator IEEE 80](https://elek.com/resources/free-electrical-calculators/earthing-grid-resistance-ieee-std-80-calculator): Calculate earthing grid resistance for substations based on total buried conductor length to IEEE Std. 80. - [Lightning Protection Calculator](https://elek.com/resources/free-electrical-calculators/lightning-protection-rolling-sphere-method-calculator): Calculate lightning protection using rolling sphere method for six independent shielding cases with empirical equations. ### High Voltage Cable Calculators - [Equivalent Thermal Resistance Calculator](https://elek.com/resources/free-electrical-calculators/equivalent-thermal-resistance-of-cable-layers): Calculate equivalent thermal resistivity for high voltage cable layers made of different materials for thermal modeling. ## Technical Articles by Category ### Low Voltage Design - [Low Voltage Design Articles](https://elek.com/articles/category/low-voltage-design): Expert technical content on low voltage design, cable sizing, voltage drop, fault loop impedance, and maximum demand. - [AS/NZS 3008 Cable Sizing Guide](https://elek.com/articles/as-nzs-3008-cable-sizing-calculations-step-by-step-guide): Step-by-step cable sizing calculations covering active, neutral, and earth cables using AS/NZS 3008, including current capacity, voltage drop, and short-circuit calculations. - [Voltage Drop Calculation Methods](https://elek.com/articles/voltage-drop-calculation-method-with-examples): Accurate voltage drop calculation equations and methods with power factor, cable operating temperature, resistance, and reactance for DC, single-phase, and three-phase systems. - [Voltage Drop Limits](https://elek.com/articles/voltage-drop-limits-for-low-voltage-installations): Voltage drop limits for low voltage installations according to international standards. - [Cable Rating Derating Factors](https://elek.com/articles/cable-rating-derating-factors): Nine main derating factors affecting cable current ratings including depth of burial, thermal resistivity of soil, ambient temperature, grouping factors, and load factors. - [Short Circuit Cable Sizing](https://elek.com/articles/short-circuit-rating-calculations-for-cables): Adiabatic equations for calculating minimum conductor size to withstand short circuits, including K-factor calculations for different cable materials. - [Voltage Rise Calculations for Solar PV](https://elek.com/articles/voltage-rise-calculations): Voltage rise calculations for solar PV systems according to AS/NZS 4777.1 with simple and accurate calculation methods. - [Touch Voltage Calculations for LV Systems](https://elek.com/articles/touch-voltage-calculations-for-lv-electrical-systems): Touch voltage calculations for low voltage electrical systems covering AS/NZS 3000, BS 7671, and NFPA 70E standards. - [MCB Selection Guide](https://elek.com/articles/miniature-circuit-breaker-selection-guide): Miniature Circuit Breaker selection guide covering device curves (Z, B, C, K, D) and tripping characteristics for overcurrent protection. - [Cable Current Rating Calculations](https://elek.com/articles/cable-current-rating-calculations-guide): Complete guide to calculating cable current ratings based on ambient temperature, installation method, grouping factors and soil conditions. - [Cable Sizing for Variable Speed Drives](https://elek.com/articles/cable-sizing-for-variable-speed-drives): Special considerations for cable sizing when supplying variable speed drives including harmonic effects and voltage drop. - [Cable Depth of Burial](https://elek.com/articles/cable-depth-of-burial): Cable depth of burial requirements and recommendations according to AS/NZS 3000, IEC 60364, and BS 7671. - [Grouping Derating Factors](https://elek.com/articles/cable-derating-factors-for-grouped-circuits): Derating factors for cables installed in groups accounting for mutual heating effects. - [Ambient Temperature Derating](https://elek.com/articles/ambient-temperature-derating-factors-for-cables): Derating factors for cables in ambient temperatures different from standard reference conditions. - [Fault Current Calculations](https://elek.com/articles/fault-current-calculations-lv-systems): Fault current calculations for low voltage systems including three-phase and earth fault currents. - [Neutral Conductor Sizing](https://elek.com/articles/neutral-conductor-sizing): Neutral conductor sizing requirements considering harmonic currents and unbalanced loads. - [Earth Conductor Sizing](https://elek.com/articles/earth-conductor-sizing-requirements): Earth conductor sizing requirements based on protective device characteristics and fault clearing times. - [Ring Circuit Design](https://elek.com/articles/ring-final-circuit-design-guide): Ring final circuit design guide for BS 7671 installations including cable sizing and protection requirements. ### High Voltage Cable Design - [High Voltage Cable Design Articles](https://elek.com/articles/category/high-voltage-cable-design): Technical articles on HV cable ampacity, thermal analysis, IEC 60287 calculations, and cable installation methods. - [IEC 60287 Cable Rating Calculations](https://elek.com/articles/iec-60287-cable-rating-calculations-guide): Complete guide to IEC 60287 standard for calculating steady-state current rating of power cables. - [Cable Thermal Resistance](https://elek.com/articles/cable-thermal-resistance-calculations): Thermal resistance calculations for cable insulation, sheaths, and external thermal environment. - [Cable Rating in Ducts and Trenches](https://elek.com/articles/cable-rating-in-ducts-and-trenches): Current rating calculations for cables in ducts, pipes, and trenches considering thermal coupling effects. - [Buried Cable Rating](https://elek.com/articles/buried-cable-rating-calculations): Current rating calculations for directly buried cables considering soil thermal properties and installation depth. - [Cable Crossing Derating](https://elek.com/articles/cable-crossing-derating-factors): Derating factors for cables crossing other cables or heat sources including pipes and ducts. - [Cyclic Cable Ratings](https://elek.com/articles/cyclic-cable-rating-calculations): Cyclic and emergency rating calculations for cables with time-varying loads. - [Cable Temperature Calculations](https://elek.com/articles/cable-conductor-temperature-calculations): Step-by-step calculation of cable conductor temperature based on load current and thermal parameters. - [Submarine Cable Ratings](https://elek.com/articles/submarine-cable-rating-considerations): Special considerations for submarine cable ratings including seabed thermal properties and water currents. - [Cable Screen and Sheath Losses](https://elek.com/articles/cable-screen-sheath-losses): Calculation of losses in cable screens and metallic sheaths due to induced currents and circulating currents. - [Parallel Cable Circuits](https://elek.com/articles/parallel-cable-circuits-current-sharing): Current sharing analysis for parallel cable circuits and magnetic field considerations. - [Cable Installation Methods](https://elek.com/articles/cable-installation-methods-comparison): Comparison of different cable installation methods and their effect on current rating. - [Soil Thermal Properties](https://elek.com/articles/soil-thermal-resistivity-measurements): Soil thermal resistivity measurement methods and typical values for different soil types. - [Cable Route Thermal Surveys](https://elek.com/articles/cable-route-thermal-surveys): Thermal survey methods for cable routes to determine actual soil conditions and cable temperatures. ### Earthing and Grounding Design - [Earthing and Grounding Articles](https://elek.com/articles/category/earthing-and-grounding-design): Technical articles on earthing system design, IEEE 80 calculations, soil modeling, and grid resistance. - [IEEE 80 Earthing System Design](https://elek.com/articles/ieee-80-earthing-system-design-guide): Complete guide to designing earthing systems according to IEEE Standard 80 including grid resistance and safety calculations. - [Earthing Grid Design Process](https://elek.com/articles/earthing-grid-design-process): Step-by-step process for designing substation earthing grids from initial layout to final verification. - [Two-Layer Soil Models](https://elek.com/articles/two-layer-soil-model-earthing): Two-layer soil modeling for earthing system design including soil resistivity interpretation and layer depth determination. - [Multilayer Soil Modeling](https://elek.com/articles/multilayer-soil-modeling-earthing-systems): Advanced multilayer soil modeling techniques for complex soil structures with 3, 4, or 5 layers. - [Soil Resistivity Measurements](https://elek.com/articles/soil-resistivity-measurements-guide): Wenner four-point method for measuring soil resistivity and interpreting results for earthing design. - [Touch and Step Voltage Analysis](https://elek.com/articles/touch-step-voltage-analysis): Analysis methods for calculating and evaluating touch and step voltages in and around substations. - [Ground Potential Rise Calculations](https://elek.com/articles/ground-potential-rise-gpr-calculations): Ground potential rise calculations for substations during fault conditions and safety assessment. - [Earthing Grid Conductor Sizing](https://elek.com/articles/earthing-conductor-sizing-guide): Sizing earthing conductors based on fault current magnitude, duration, and material properties. - [Vertical Earthing Rods](https://elek.com/articles/vertical-earthing-rods-design): Design considerations for vertical earthing rods including depth, diameter, spacing, and resistance calculations. - [Earthing Transformer Selection](https://elek.com/articles/earthing-transformer-selection): Earthing transformer selection and sizing for industrial and utility applications. - [Lightning Protection Systems](https://elek.com/articles/lightning-protection-system-design): Lightning protection system design using air terminals, down conductors, and earthing systems to IEC 62305. - [Concrete Encased Electrodes](https://elek.com/articles/concrete-encased-electrodes-earthing): Design and performance of concrete encased earthing electrodes including resistance calculations. - [Corrosion in Earthing Systems](https://elek.com/articles/corrosion-earthing-systems): Corrosion mechanisms in earthing systems and material selection for long-term reliability. - [Earthing for Renewable Energy](https://elek.com/articles/earthing-solar-wind-farms): Earthing system design considerations for solar and wind farms including equipment grounding and lightning protection. - [Earth Fault Current Analysis](https://elek.com/articles/earth-fault-current-analysis): Earth fault current analysis for substations connected by cable transmission lines with case studies. - [Transmission Line Grounding](https://elek.com/articles/transmission-line-grounding): Transmission line grounding for adequate lightning performance and effective fault current dissipation. - [Earthing Conductor Material Selection](https://elek.com/articles/earthing-conductor-material-selection): Comparison of copper, aluminum, galvanized steel, and copper-clad steel for earthing conductors balancing electrical properties and cost. - [SafeGrid vs CDEGS Benchmark](https://elek.com/articles/safegrid-vs-cdegs-benchmark): SafeGrid Earthing Software validation showing virtually identical results to CDEGS for grid resistance in multilayer soils up to 5 layers. - [IEEE Std 80 Benchmark Cases](https://elek.com/articles/ieee-std-80-benchmark-cases): Annex H benchmark case results comparing SafeGrid with CDEGS, ETAP, and other earthing software. ### Arc Flash Calculations - [Arc Flash Calculation Example](https://elek.com/articles/step-by-step-arc-flash-calculation-real-world-example-using-ieee-standard-1584): Complete step-by-step AC arc flash calculation for industrial installation with transformer, main switchboard, and distribution boards using IEEE 1584-2018. - [Understanding Arc Flash Hazards](https://elek.com/articles/understanding-arc-flash-hazards): Complete guide to arc flash hazards, study methods, flash boundary calculations to IEEE 1584, and PPE categories and label requirements. - [Arc Flash Working Distances](https://elek.com/articles/typical-working-distances-for-arc-flash-calculations): Standard working distances for arc flash calculations from IEEE 1584, ENA NENS 09, NFPA 70E, and DGUV standards. ### Software Comparisons - [Software Comparisons](https://elek.com/articles/articles-software-comparisons): Expert comparisons of power system software tools for earthing, cable ratings, electrical design, protection coordination, and arc flash studies. - [Cable Pro Web vs JCalc](https://elek.com/articles/cable-pro-web-vs-jcalc): Honest comparison of Cable Pro Web and JCalc pricing, features, and ease of use for cable sizing software. - [Best Australian Electrical Software 2024](https://elek.com/articles/best-australian-electrical-software-2024): Review of top 3 electrical engineering design software packages for Australian standards comparing features, capabilities, pricing, and support. - [Cable HV vs CYMCAP](https://elek.com/articles/cable-hv-vs-cymcap): Detailed feature comparison of ELEK Cable HV and CYMCAP software for high voltage cable rating calculations. - [7 Best Earthing Software Packages](https://elek.com/articles/7-best-earthing-and-grounding-design-software-compared): Comparison of SafeGrid, CDEGS, XGSLab, ETAP, and other earthing and grounding system design software. ## Technical Publications - [Technical Publications](https://elek.com/resources/technical-publications): Download white papers and technical publications on electrical power engineering design principles and practical applications. - [Voltage Drop Calculations Guide](https://elek.com/resources/technical-publications): Technical paper on performing electrical design calculations for voltage drop in low voltage systems. - [Economic Cable Sizing Paper](https://elek.com/resources/technical-publications): Technical paper covering economic cable sizing equations and calculation examples. - [Derating Buried Cables Crossing Heat Sources](https://elek.com/resources/technical-publications): Technical paper on derating of buried cables crossing heat sources and other cables. - [Power Cable Ratings Factors Review](https://elek.com/resources/technical-publications): Comprehensive review of factors affecting power cable ratings using Cable High Voltage Software. - [Magnetic Field Calculations](https://elek.com/resources/technical-publications): Technical paper on magnetic field calculations, affecting factors, and recommended safe limits. - [Emergency and Cyclic Cable Ratings](https://elek.com/resources/technical-publications): Technical paper on transient emergency and cyclic ratings of cables to IEC Standards. - [Optimized Phasing Arrangements](https://elek.com/resources/technical-publications): Technical paper on optimized phasing arrangements for single core cable configurations to minimize magnetic fields. - [Touch and Step Voltage Limits Calculations](https://elek.com/resources/technical-publications): Technical paper providing equations for calculating safe touch and step voltage limits. - [Parametric Analysis of Earthing Grids with Rods](https://elek.com/resources/technical-publications): Technical paper on effects of rods on potential plots and grid resistance. - [Custom Buried Earthing Systems Modeling](https://elek.com/resources/technical-publications): Tutorial on importing and modeling custom buried earthing systems using SafeGrid Earthing Software. - [Vertical Rods to Reduce Grid Resistance](https://elek.com/resources/technical-publications): Technical paper on use of vertical rods to reduce grid resistance, GPR, and improve safety by reducing touch and step potentials. ## Resources & Support - [Resources](https://elek.com/resources): Technical articles, free calculators, software tutorials, online courses and training for electrical power systems software. - [Articles Hub](https://elek.com/articles): Power systems technical articles covering earthing system modeling, power cable ratings, HV/LV electrical design, protective device coordination, and arc flash studies to IEC and IEEE standards. - [Tutorials](https://elek.com/tutorials): Video and step-by-step tutorials to help users get the most out of ELEK electrical engineering software. - [Support](https://elek.com/support): Technical support for ELEK electrical engineering design software applications. - [About ELEK](https://elek.com/company): Founded in 2009, Electrotechnik creates electrical power systems design software that is easy to use and accurate. - [Training](https://elek.com/training): Power systems design training courses available in-person, self-paced, or private instruction for ELEK software users. - [Free Webinars](https://luma.com/elek): Join free live webinars and training sessions on electrical power systems design software and engineering calculations. ## Optional - [Videos](https://elek.com/resources/videos): Technical videos covering Cable Pro, SafeGrid Earthing, Cable High Voltage, and other ELEK products. - [Pricing](https://elek.com/pricing): Software pricing calculator to find prices for ELEK software packages or calculate upgrade costs for existing customers. - [Partner Program](https://elek.com/company/partner-program): Reseller and educational institution partnership programs for ELEK electrical design software. - [Wind Turbine Generators Behavior](https://elek.com/resources/technical-publications): Technical report on steady-state and dynamic behaviour of wind turbine generators.