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Lineman's Reference - XFMR LAB

Lineman's Reference - XFMR LAB

Transformer Training Simulator

270 ratings
45 reviews
#9 in paid Education
📚 Education
🎬 Entertainment
$19.99

Details

  • Released
  • Updated
  • September 12, 2021
  • August 9, 2026

Features

Developer

Digital Apprentice LLC
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About

This interactive simulator allows users to study and learn transformer connections. Test your wiring with various meters, and experience consequences of improper connections. Includes reference diagrams, informational material, and a quiz mode to test knowledge.

✓Transformer connection simulation
✓Volt, ohm, and rotation meters
✓Abnormal voltage and fuse explosion simulation
✓Transformer nameplate and coil inspection
✓Quick reference diagrams
✓Informational reading material
✓Quiz and advanced quiz modes
Show original description

What users say

Summarized from real user reviews of Lineman's Reference. Based on 270 reviews and a 4.5/5 average, it highlights the 8 positives and 8 negatives reviewers mention most about this Education app.

Positive things

  • 👍Great for learning
  • 👍Helpful for apprentices
  • 👍Useful practice tool
  • 👍Good concept
  • 👍Excellent labs and sandbox
  • 👍Helps memorize bank building
  • 👍Great training reference
  • 👍Awesome app

Negative things

  • 🐛Too many bugs
  • 🐛App is clunky
  • 🐛Wiring issues
  • 🐛Incorrect diagrams
  • 🐛Incorrect quiz answers
  • 🐛Voltmeter not working
  • 🐛Limited transformer options
  • 🐛Confusing connection requirements
See all reviews

What's New in Lineman's Reference

2.0.5

August 9, 2026

Various Bug Fixes.

Charts

Top Paid

📈 9+1

Education

This app rose +1 position in Education chart.

Last updated on September 1, 2026.

Top Paid

📈 159+6

Global

This app rose +6 positions in Global chart.

Last updated on September 2, 2026.

User reviews

Most RecentHighest RatedLowest Rated

Tutorial

Will not let me out of the tutorial I have completed it multiple times I just want to practice on banks and the different kind paid $20 and I can’t do anything but a tutorial over and over again
jojojo47657jojojo47657

Great for storm

Excellent labs and sandbox, has literally everything
WillyGGGGGWillyGGGGG

Response from developer

Thanks for the review!

Great concept but to many bugs

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.
Fishing noahFishing noah

Very useful!!!

I’m a co-op student and I play around with this app a lot! It’s definitely going to help a lot in the future!!
PoweringthworldPoweringthworld

Response from developer

Thanks for the review! I'm glad you find it helpful!

Good app

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
Oklahoma001Oklahoma001
See 40 more reviews

Developer apps

Lineman's Reference - URD
Lineman's Reference - URD

Underground Lineman Trainer

📚 Education

(59)

$9.99
See developer apps

User experience

🐞

Reported Bugs

33 issues

Tutorial loop

Bug

Lines not connecting

Bug

Cannot wire up all banks

Bug

WYE Delta is wrong

Bug

Cannot bus secondary x2 to x2 bushing for delta secondaries

Bug

Cannot select subtractive transformers

Bug

Wiring on X bushings not to exact phase

Bug

H2 to neutral connection issues

Bug

WYE Delta bank gives wrong voltage read

Bug

Fuse blows when attaching case grounds in delta secondary

Bug

Wrong wiring in diagram for 277/480 Wye/Wye bank

Bug

HV on transformer name plate is wrong

Bug

Shows wrong connection with right hook up

Bug

Paralleling cans connection issue

Bug

Voltmeter does not work

Bug

Cannot drop leads to voltmeter on bottom two phases

Bug

No option to select transformers

Bug

No option for primary voltage

Bug

No 277/480 option

Bug

No additive/subtractive options

Bug

Cannot pick secondary and primary side voltages

Bug

App tells user bank is wrong when it's correct

Bug

App incorrectly identifies bank type

Bug

Cannot put voltmeter on C phase secondary leads in horizontal screen

Bug

Cannot create 277/480 and straight 480 banks

Bug

Cannot manually parallel secondary windings

Bug

Lines too close to bottom of screen

Bug

Cannot look back at bank during quiz

Bug

High side H2 tied to ground in WYE delta

Bug

Only allows 120/240 or 120/208 hookups

Bug

Voltmeter not reading correctly when paralleling

Bug

App says something is wrong but doesn't specify correction

Bug

App keeps blowing doors on a correct connection

Bug
✨

Requested Features

23 requests

Ability to build own banks

Feature

Add tap changer settings

Feature

Add vector charts

Feature

Add more labs with different scenarios

Feature

Create your own bank option

Feature

Add a WYE bank that stays in series

Feature

Add hints button

Feature

Add power banks

Feature

Add single bushing pots

Feature

Add 480 banks

Feature

Include transformers of different polarities

Feature

Add 4th cutout to WYE delta banks

Feature

Add additive and subtractive transformers

Feature

Select transformers from a list

Feature

Tie three phase secondary legs on open secondary lines

Feature

Add lighter bank category

Feature

Expand into metering

Feature

Add open delta WYE bank

Feature

Practice drawing vectors

Feature

See vectors for transformers

Feature

Ability to cut over pots

Feature

Add 240/480/277 and 277/480 options

Feature

More in-depth internals

Feature

FAQ

What does the Lineman's Reference - XFMR LAB app do?

This app is a fully functional transformer lab simulator designed for linemen and apprentices. It allows users to study and learn various transformer connections, test their wiring with meters, and understand the consequences of improper connections. It also provides reference materials and quiz modes.

What are the key features of this transformer simulator?

Key features include interactive simulation of single-phase and three-phase transformer banks, testing connections with volt, ohm, and rotation meters, simulating abnormal voltages and exploding fuses, inspecting transformer nameplates and secondary coils, quick reference diagrams, informational reading material, and quiz modes to test knowledge.

Is this app free to use?

Yes, based on the provided information, the app is free to use and does not have in-app purchases or ads. The company also offers a 'Company Customized Experience' which may involve separate arrangements.

What kind of transformer configurations can I learn and test?

The app includes labs for various configurations such as Single Bushing Topside, Dual Bushing Topside, Delta Delta Closed, Delta Wye Closed, Wye Delta Closed, Wye Wye Closed, Delta Delta Open, Wye Delta Open, Paralleling, 4th Cutout, Troubleshooting, Tutorial, Straight 480, 240/480, 277/480, Corner Grounded 240 or 480, and Wye Wye 5 Wire (120/240 & 120/208).

How does the quiz mode work?

The quiz mode allows you to test your transformer wiring knowledge by completing a predetermined assortment of labs at random. Blowing fuses and attempting to check work will subtract from your overall score out of 100. There is also an 'Advanced Quiz' where you receive job-site information and must choose the correct transformer configuration.