This document introduces the short circuit current ratings (SCCR) and branch circuit protection, as well as the recommended fuse ratings for UL and CSA requirements of ATV212 AC drive.
The guide supplies the short‑circuit current rating (SCCR) information and coordination data required for UL and CSA compliance when installing the ATV212 variable‑frequency drive. It includes tables of recommended fuse ratings, enclosure volume requirements, and wiring configurations for different voltage systems.
Key points cover the 100 kA SCCR on the drive output, allowable fuse types (fast‑acting, time‑delay, Class CC), and specific ratings for 208 V and 480 V three‑phase systems. The document also notes that smaller fuse ampere values may be used where appropriate.
| Short‑circuit current rating (output) | 100 kA |
|---|---|
| Input frequency | 60 Hz |
| Rated output voltage (example) | 208 V, 3‑phase |
| Fuse voltage rating (example) | 600 V class J |
The Altivar 212 has a 100 kA SCC rating on the output of the drive.
Yes, smaller amp sizes may be used.
Fast‑acting, time‑delay, or Class CC fuses may be used.