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Description
SKM, ETAP, & EDSA Power System Analysis TutorialsThe object of this book is to teach the beginner the basics of three popular power system analysis programs. These programs are designed to simulate and analyze electrical power generation and distribution systems in normal operation and in short circuit. The programs also have many add on options like protection selection, arc flash analysis, transmission line sag & tension, raceway calculations, transient motor starting, etc. The programs have Demo
The object of this book is to teach the beginner the basics of three popular power system analysis programs. These programs are designed to simulate and analyze electrical power generation and distribution systems in normal operation and in short-circuit. The programs also have many add-on options like protection selection, arc flash analysis, transmission line sag & tension, raceway calculations, transient motor starting, etc. The programs have Demo (demonstration or trial) versions to allow people to tryout and learn about them. This book provides the engineer and technologist with information needed to use the Demo versions of SKM, ETAP, and EDSA for load flow and short-circuit analysis. The beginner learns how to use them on a small, but realistic, three-phase power system. The information gained is similar to that which students pay for in company-taught "Introduction to ..." courses. However, with this book, the student avoids paying tuition, learns at times of his own convenience, and can compare the different programs. In this book, load flow (power-flow) and short-circuit analyses are done on a small steady-state three-phase power system with manual methods. Then, each program is used to carry out the same analyses. Since in practice, three-phase systems are the most often analyzed, only three-phase systems will be considered in this book. The DC and single-phase capabilities of the programs will not be considered. The person using this book should already have an analytical electrical background. Academically, he should be educated to at least the level of a university two-year electrical engineering technology program.Binding Type: Paperback
Publisher: Stephen P. Tubbs
Published: 05/12/2009
ISBN: 9780981975306
Pages: 156
Weight: 0.81lbs
Size: 11.02h x 8.27w x 0.33d
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★★★★★ 5
Keeps my puppy happy!!
Color: Orange - 3.15Inch
My 8 month old puppy loves this ball!! He is so happy when we charge it up for him!! It's great because it keeps him busy for a few minutes and it tires him out. This is our second one so we always have one ready to go for him.
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Reviewed in the United States on May 27, 2026
★★★★★ 5
Fun Dog Toy
Color: Orange - 3.15Inch, Color: Orange - 3.15Inch
My Goldendoodle loves this ball! It’s the perfect size, easy to carry, and keeps her busy for a long time. Great purchase.
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Reviewed in the United States on June 10, 2026
★★★★★ 5
Orange Ball Endless Dog Zoomies
Color: Tangerine - 3.15Inch
My dog was immediately curious about this ball, and it quickly turned into one of the toys that gets pulled out multiple times throughout the day. The movement keeps things interesting and encourages chasing in a way that a regular ball doesn’t. I like that it keeps my dog occupied when the weather isn’t great for long outdoor play sessions. The textured surface provides a decent grip when carrying it around the house. It has bounced off furniture and walls a few times and still looks surprisingly good afterward. The size worked well for my medium-sized dog and was easy for him to grab. There were a couple moments where it got stuck in tight spaces, but that’s more a result of enthusiastic play than a problem with the toy itself. The activity level definitely increased when this ball started moving around. It’s been a fun way to add a little extra excitement to indoor playtime.
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Reviewed in the United States on June 10, 2026
★★★★★ 5
Easy to charge and bounces nicely on the grass
Color: Tangerine - 3.15Inch
Getting the kids' backpacks ready usually means the dog gets ignored for a bit and starts pacing. I turn this ball on and toss it out the back door. It has a surprising amount of bounce on the grass, and the random movements keep him running circles trying to catch it. Pushing the button to switch the rolling modes is straightforward. The battery gets me through a few play sessions before it needs to be plugged back in. The outer shell gets pretty dirty outside, but wiping it down with a damp rag cleans it right up. It’s got a decent weight to it, so it doesn't just get stuck under the lawn chairs immediately.
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Reviewed in the United States on June 12, 2026
★★★★★ 1
Beware of poor quality issues!
Color: Orange - 3.15Inch, Color: Orange - 3.15Inch
Got limited use out of ball, seemed to have quite a strong motor and was going to be a good buy. But upon going to recharge it for the first time, discovered the USB port was completely loose/not attached. Will steer clear of this brand going forward.
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Reviewed in the United States on May 26, 2026
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