Field-grade tools.
Built for the substation.
One subscription unlocks every calculator, checklist, and reference for relay testing and commissioning work.
- CT / VT Calculator
- All modes — ratio, burden, accuracy
- Commissioning Checklists
- Pre-energization, energization, post
- Relay Quick Reference
- Full ANSI device number library
- Offline Field Notes
- Capture on-site, sync to the cloud
- Installable PWA
- Native-feel on iPhone & Android
- Cancel anytime
- No contracts, no lock-in