HRN-57N is a voltage monitoring relay for 3-phase networks with independently adjustable upper and lower levels, for protecting devices in the switchboard.
Key features
- Supply = monitored voltage: 3× 400/230 V (L1, L2, L3, N)
- Adjustable Umax 105 – 125 % Un and Umin 75 – 95 % Un
- Adjustable time delay t2 0.1 – 10 s to ignore short peaks and drops
- Does not monitor phase sequence
- Output: 1× changeover 8 A/AC1
- 1-module DIN rail housing, 90 × 17.6 × 64 mm
