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SKM vs ETAP vs EasyPowerAn Engineer’s View to Engineering Analysis Software
May 18, 2020Presenter: Lucian Gavriliuc
IEEE IAS Atlanta
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How calculations were done before
software:
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Agenda
Criteria for Choosing Software
IEEE Standards
Software Pakages:
SKM
ETAP
EasyPower
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Criteria for Choosing Software:
COST
Product Cost?
Maintenance Fee?
Training or Consulting Costs?
Learning curve?
Number of users?
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Additional Criteria for Choosing
Engineering Software:
Component library
Does it include the latest protection
components from all the major industry
players?
Technical Support
Features vs Price
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Features:
Load Flow
Short-Circuit
Arc Flash
Harmonics
Motor Starting
Duct Bank Heating
Step & Touch Potential
Device Protection and
Coordination
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IEEE Standards
IEEE Standard 80-2013 - IEEE Guide for Safety in AC Substation
Grounding
IEEE Standard 141-1993 – Recommended Practice for Electric Power
Distribution for Industrial Plants
IEEE Standard 241-1990 – Recommended Practice for Electric Power
Systems in Commercial Buildings
IEEE Standard 242–2001 – IEEE Recommended Practice for Protection
and Coordination of Industrial Power Systems
IEEE 551-2006 – Recommended Practice for Calculating AC Short-Circuit
Currents in Industrial and Commercial Power Systems
IEEE 1584–2018 - IEEE Guide for Performing Arc-Flash Hazard
Calculations
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Equation Slide:
𝑉 = 𝐼(𝑅 cos ∅ + 𝑋 sin ∅)
Approximate Voltage Drop Formula:
V = voltage drop, line to neutral
I = current flowing in conductor
R = line resistance for one conductor, in ohms (Ω)
X = line reactance for one conductor, in ohms (Ω)
∅ = angle whose cosine is the load power factor
cos ∅ = load power factor, in decimals
sin ∅ = load reactive factor, in decimals
Voltage System Multiply By
Single Phase 2
Three Phase 3
Reference: IEEE Std 141-1993 Chapter 3, p97
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ETAP 19.0.1 – Edit Mode
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ETAP 19.0.1 – Time Current Curve (TCC)
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ETAP 19.0.1 – Arc Flash Label
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SKM Power Tools 8.0.2.5
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SKM Power Tools 8.0.2.5 – TCC
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SKM Power Tools 8.0.2.5 – Arc Flash Label
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EasyPower 10.2 – Database Edit
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EasyPower 10.2 – TCC
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EasyPower 10.2 – Arc Flash Label
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Reports – Typical File Formats
SKM
Filetype: *.rpt
ETAP
Filetype: *dosx, *.xlsx, *.pdf
Easypower
Filetype: *.xlsx, *.csv
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Sample Reports – SKM, ETAP, EASYPOWER
Screenshot: https://youtu.be/QHlvLBOh2ys
SKM ETAP EASYPOWER
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Other Modules Built-in ETAP:
ETAP:
Duct bank heating calculation
Cable Ampacity Calculation
Ground Grid / Step & Touch Potential
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SKM Power*Tools:
PTW GroundMAT
IEEE Std 80
Sunde Method
Gradient Method
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EasyPower:
Partner firm SINT Ingegneria
Software: XGSLab
Includes several modules:
GSA (GROUNDING SYSTEM ANALYSIS)
GSA_FD (GROUNDING SYSTEM ANALYSIS in the FREQUENCY DOMAIN)
XGSA_FD (OVER AND UNDERGROUND SYSTEM ANALYSIS in the FREQUENCY DOMAIN
XGSA_TD (OVER AND UNDERGROUND SYSTEM ANALYSIS in the TIME DOMAIN)
NETS (NETWORK SOLVER)
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Software Experiences: SKM, ETAP & EasyPower
USER Interface
Developing the electrical model
Adding equipment:
Buses, Motors, Fuses, VFDs
Relays and current transformers
Performing Studies:
Load Flow Analysis, Short-Circuit Analysis,
Protection and Coordination Analysis
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Q & A