The HRU harmonic restraint relay is a high speed relay used for the supervision of differential, overcurrent, or pilot relays. It is applied in various transformer protection schemes to provide security against false tripping on transformer magnetization inrush.
Why ABB?
-
Long production life, ease of application and reliable protection
- High quality design
- 12 year warranty
- Short lead times
- Consistent on-time delivery
-
24/7 customer support