Function and Purpose
The NR2 series thermal overload relay (hereinafter referred to as the thermal relay) is suitable for AC motors with a frequency of 50Hz/60Hz, voltage up to 690V, and current (0.1-150)A for long-term or intermittent long-term operation, providing overload and phase failure protection.
Detailed Description
Parameters:
Current frame size: 13/25/36/93/150/200/630
Set current range: 0.1~630A
Installation method: Combined type, independent type
Advantages/Core Functions:
01 Three-phase bimetallic type, with phase failure protection, has an actuating mechanism, and has a test mechanism
Details
| Parameter Category | Parameter Item | Parameter Value |
|---|
| Current Rating | NR2-11.5 | 13 |
| NR2-25 | 25 |
| NR2-36 | 36 |
| NR2-93 | 93 |
| NR2-150 | 150 |
| Rated Insulation Voltage V | NR2-11.5 | 690 |
| NR2-25 | 690 |
| NR2-36 | 690 |
| NR2-93 | 690 |
| NR2-150 | 690 |
| Rated Impulse Withstand Voltage V | NR2-11.5 | 6000 |
| NR2-25 | 6000 |
| NR2-36 | 6000 |
| NR2-93 | 6000 |
| NR2-150 | 6000 |
| Enclosure Protection Level | NR2-11.5 | IP20(front side) |
| NR2-25 | IP20(front side) |
| NR2-36 | IP20(front side) |
| NR2-93 | IP20(front side) |
| NR2-150 | IP00 |
| Phase Failure Protection | NR2-11.5 | Yes |
| NR2-25 | Yes |
| NR2-36 | Yes |
| NR2-93 | Yes |
| NR2-150 | Yes |
| Manual and Automatic Reset | NR2-11.5 | Yes |
| NR2-25 | Yes |
| NR2-36 | Yes |
| NR2-93 | Yes |
| NR2-150 | Yes |
| Temperature Compensation | NR2-11.5 | Yes |
| NR2-25 | Yes |
| NR2-36 | Yes |
| NR2-93 | Yes |
| NR2-150 | Yes |
| Tripping Indication | NR2-11.5 | Yes |
| NR2-25 | Yes |
| NR2-36 | Yes |
| NR2-93 | Yes |
| NR2-150 | Yes |
| Test Button | NR2-11.5 | Yes |
| NR2-25 | Yes |
| NR2-36 | Yes |
| NR2-93 | Yes |
| NR2-150 | Yes |
| Stop Button | NR2-11.5 | Yes |
| NR2-25 | Yes |
| NR2-36 | Yes |
| NR2-93 | Yes |
| NR2-150 | Yes |
| Installation Method | NR2-11.5 | Insertion Type |
| NR2-25 | Insertion Type |
| NR2-36 | Insertion Type |
| NR2-93 | Insertion Type |
| NR2-150 | Insertion Type |
| Auxiliary Contact | NR2-11.5 | 1NO+NC |
| NR2-25 | 1NO+NC |
| NR2-36 | 1NO+NC |
| NR2-93 | 1NO+NC |
| NR2-150 | 1NO+NC |
| AC-15 220V Rated Current A | NR2-11.5 | 2.73 |
| NR2-25 | 2.73 |
| NR2-36 | 2.73 |
| NR2-93 | 2.73 |
| NR2-150 | 2.73 |
| AC-15 380V Rated Current A | NR2-11.5 | 1.58 |
| NR2-25 | 1.58 |
| NR2-36 | 1.58 |
| NR2-93 | 1.58 |
| NR2-150 | 1.58 |
| DC-12 220V Rated Current A | NR2-11.5 | 0.2 |
| NR2-25 | 0.2 |
| NR2-36 | 0.2 |
| NR2-93 | 0.2 |
| NR2-150 | 0.2 |
| Wire cross-sectional area mm² | Main circuit Single core or stranded wire | NR2-11.5 1-4 |
| NR2-25 | 1-4 |
| NR2-36 | 4-10 |
| NR2-93 | 4-35 |
| NR2-150 | 25-50 |
| Auxiliary circuit Single core or stranded wire | NR2-11.5 1-2.5 |
| NR2-25 | 1-2.5 |
| NR2-36 | 1-2.5 |
| NR2-93 | 1-2.5 |
| NR2-150 | 1-2.5 |
| Wire terminal screw | NR2-11.5 M3.5 |
| NR2-25 | M4 |
| NR2-36 | M10 |
| NR2-93 | M6/M8 |
| NR2-150 | M3.5 |
