# XFMR Lab Enterprise

> XFMR Lab Enterprise (iPhone/iPad app by Digital Apprentice LLC.)

- Source: https://appshunter.io/ios/app/xfmr-lab-enterprise/id6816448814 (this page in markdown: same URL + `.md`)
- Developer: [Digital Apprentice LLC](https://appshunter.io/developer/1565687382)
- Category: Education
- Price: Free
- Age rating: 4+
- Requires: iOS 16.0 · 66 MB
- Languages: English
- Released: 2026-10-08
- Data updated: 2026-10-12

## What is XFMR Lab Enterprise?

The classroom edition of XFMR Lab, for utilities and lineman training programs.

Wire it. Energize it. Find out what went wrong before you do it on a pole. XFMR Lab simulates utility distribution transformer banks with the meters, fuses and fault behavior you would see on the real thing. Built by a working journeyman lineman for apprentices and crews who would rather make their mistakes in an app than in the field.

This edition is for organizations. Licensed Code Access Only: your school or employer gives you a code, and the app opens. There is nothing to buy inside the app. Individuals can find the public edition on the App Store as Lineman's Reference - XFMR Lab.

FOR INSTRUCTORS:

The Instructor Board runs creates a class you run from an iPad or phone. Start a session, give students the join code, and assign labs to the whole class, a group or one student. As they work you see each student's wiring live on your screen, along with failed checks, blown fuses, hazards and their score. Students can raise a hand, skip a lab for a second look, or say I don't know; you can mark a lab assisted when you walked them through it. Homework sessions stay open for days with a due time. At the end, the results are on your board and export cleanly as a CSV you can download or email.

FOR STUDENTS

Join a session with a code and a nickname. Your instructor sees your progress while a lab is open, and the card on your screen says exactly what they can and cannot see. Outside a session, every lab and reference below is yours to practice on.

THE LABS

Single Phase: Single Bushing Topside, Dual Bushing Topside.
Three Phase, closed banks: Delta-Delta, Delta-Wye, Wye-Delta, Wye-Wye.
Three Phase, open banks: Open Delta-Delta, Open Wye-Delta.
Misc: Paralleling, 4th Cutout, Death Traps.
Advanced: Straight 480, 240/480, 277/480, Corner-Grounded 240/480, Wye-Wye 5-Wire (120/240 plus 120/208).
Sandbox Lab (Beta): free-form wiring with a live phasor solver.

TOOLS AND REFERENCE

Volt, ohm and rotation meters with real fault behavior. Nameplate and secondary coil inspection. Reference Diagrams, Basics and the Advanced Transformer Reference. A rebuilt Tutorial of 8 hands-on chapters, and the Training track of lessons.

Classic Quiz grades all 14 quiz-eligible labs: blowing fuses and failing Check Work subtract from your score. Advanced Quiz gives you job-site information, has you pick the nameplate and coil configuration, then wire it. Learning Mode walks apprentices through every wrong-connection check one at a time; journeymen turn it off for the test.

Class sessions send a student's nickname, results and live wiring to the instructor's board and erase them from our servers when the class ends. Nothing is used for tracking or advertising.

Built for linemen, by a lineman.


## Version history (last 1 release)

### 1.0 — 2026-10-08

No release notes.

## More apps by Digital Apprentice LLC

- [Lineman's Reference - XFMR LAB](https://appshunter.io/ios/app/linemans-reference-xfmr-lab/id1583878194)
- [Lineman's Reference - URD](https://appshunter.io/ios/app/linemans-reference-urd/id6478995455)

All apps by Digital Apprentice LLC: https://appshunter.io/developer/1565687382

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-12.*