NR2 · THERMAL OVERLOAD
NR2 protects the motor after the contactor has switched it.
The 2026 source describes NR2 for 50/60 Hz circuits to 690 V with adjustment coverage from 0.1 A to 150 A, phase-loss protection, temperature compensation and manual/automatic reset.
Verified source data
Family-level values from the 2026 manual.
| Item | NR2 source data | Selection note |
|---|---|---|
| Voltage | Up to 690 V | Confirm exact relay size |
| Adjustment range | 0.1–150 A across the family | Select a range containing motor FLA |
| Trip class | 10A | Check starting time against trip curve |
| Protection | Overload and phase-loss protection | Not a substitute for short-circuit protection |
| Contactor families | NC1, NC2 and CJX2 | Verify exact direct-mount combination |
NC1 compatibility
The detailed NR2 table lists direct pairings across NC1/CJX2 sizes and NR2 ranges.
Important: NC1 is paired with NR2 in the 2026 source data. NR8 belongs primarily with the NC8 family.
Source reference
Internal database reference for engineering review.
2026 B11 compilation: NR2 detailed pages 776–782. B12 overview: page 17.