Lineman's Reference - XFMR LAB
Screenshots
Description
This app is a fully functional transformer lab simulator that was designed and developed by a journeyman lineman, for lineman and apprentices. You can use this app to study and learn your transformer connections. When the fuses are closed in you can test your connections with a volt meter, ohm meter, and a rotation meter. Abnormal voltages and cutout fuses exploding can occur when improper connections are made. In the labs you can also inspect the transformers' nameplates and secondary coils. Quick reference diagrams, basic transformer informational reading material and more are available in this application. The Quiz mode lets you test your knowledge. The Company Customized Experience is a way for your Power Company to work with us where we will modify the app to match their spec. Tell them to reach out to us if they are interested! Current Labs in this app: -Single Phase- Single Bushing Topside Dual Bushing Topside -Three Phase- Delta Delta Closed Delta Wye Closed Wye Delta Closed Wye Wye Closed Delta Delta Open Wye Delta Open -Misc- Paralleling 4th Cutout Troubleshooting Tutorial -Advanced- Straight 480 240/480 277/480 Corner Grounded 240 or 480 Wye Wye 5 Wire (120/240 & 120/208) -Quiz- Test your transformer wiring knowledge by completing a predetermined assortment of labs at random. Blowing fuses and attempting to Check Work subtract from your overall score out of 100. -Advanced Quiz- Test your overall transformer knowledge by completing a series of random quizzes where you receive basic job-site information and have to choose the correct transformer nameplate and secondary coil configuration. You will then have the option to wire up the corresponding bank.
What's New
Fixed a bug where rotation meter sometimes would not work properly.
Details
- Developer
- Digital Apprentice LLC
- Main Category
- Education
- Version
- 1.3.02
- Version Release
- 2025-02-10
- Initial Release
- 2021-09-12
- Size
- 176 MB
- Age Rating
- 4+
- Price
- USD 12.99
- Languages
- EN
- Bundle ID
- digitalapprentice.xfmr
- Version Rating
- ★ 4.13 (128)
- First Seen
- 2026-05-28
Metadata updated 2026-06-14
Rank History
Free · Max 90 days · Top 5 categories shown (Y-axis: rank, lower is better)
No rank history data
Free Rankings
No rankings
Paid Rankings
Competitive Benchmark — Education Top 10
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User Reviews
App is far to clunky, not worth using when you can only wire up 1/3 of the banks due to the lines not connecting.
Learning a lot from this app. Only problem I’ve come across is how to tie the H1/H2 bushings to the tank ground and neutral
Your eye delta is wrong. Other than that good app.
Great app just noticed that on some of the banks you can’t bus the secondary x2 to x2 bushing for delta secondary’s. It use to work but if the developers can fix that then it would get that 5th star in my book
The app has some flaws but nothing you can’t work around. Helped me a lot on learning transformer configurations.
I really like this app, I recommend it to my apprentices to learn the concept of banking transformers. What I do no like is that I can’t select to build banks with subtractive transformers. Not every system is less than 8kv. Also, when building a bank, if the wiring on the X bushings is not to the exact phase it’s drawn on the diagrams, it won’t accept the answer.
This is a great app, let me just start with that. It would be great if you could build your own banks and check voltage and what not. The set diagrams are awesome but being able to play around with different connections would make it better. Also tap changer settings and info would also be a great addition.
If you thought you’d be able to run a lot of different scenarios with this don’t bother. The app won’t let you do a ton of stuff and if you’re trying to use it to show an apprentice or something their mistake and recreate it digitally it almost certainly won’t accurately recreate that. Basically you build it correct or it doesn’t much do anything, not much point of this unless you really just want an interactive diagram because you can’t follow one that doesn’t have movable parts—which makes zero sense to me.
Awesome app helped me get my secondary connections down but it would be even better you guys added a create your own bank option just so guys can get a better grasp. Also be helpful if you could add a wye bank that stays in series. Hope to see more options in the future.
How do you connect the h2 to the neutral everytime I tie them in I can get them to turn white but they come in upside down. How do I make them look like the picture ? I’m sure there is a way to do it but I’ve been messing with this app a few days and have yet to figure it out
Reviews are collected only for apps with detected changes (new entries or sharp risers).