Function and Application
The NR8 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 0.1A~630A for long-term or intermittent long-term operation, for overload and phase failure protection. The thermal relay also has temperature compensation, action indication, automatic and manual reset, stop functions, and the product performance is stable and reliable. Compliance standards: GB/T14048.4, IEC60947-4-1. The thermal relay is installed by plug-in with a contactor.
Details Description
Parameters:
Set current range: 0.1~630A
Tripping level: 10A
Installation method: Plug-in installation, independent installation
Advantages/Core Functions:
01 Wide set current range
Can meet more load matching
02 Electronic design
Accurate and reliable action, preventing relay misoperation
03 Integrated structure
More durable
Detailed Parameters
| Parameter Category | Parameter Item | Parameter Value |
|---|
| NR8-16 | NR8-38 NR8-100 NR8-200 NR8-630 |
| Current Rating | 16 | 38 100 200 630 |
| Rated Insulation Voltage V | 690 | 690 690 690 690 |
| Phase Failure Protection | Yes | Yes Yes Yes Yes |
| Manual and Automatic Reset | Yes | Yes Yes Manual Manual |
| Temperature Compensation | Yes | Yes Yes Yes Yes |
| Tripping Indication | Yes | Yes Yes Yes Yes |
| Test Button | Yes | Yes Yes Yes Yes |
| Stop Button | Yes | Yes Yes Yes Yes |
| Installation Method | Plug-in | Plug-in Plug-in Independent Independent |
| Auxiliary Contact | 1NO+1NC | 1NO+1NC 1NO+1NC 1NO+1NC 1NO+1NC |
| AC-15 230V Rated Current A | \ \ \ 2.5 2.5 |
| AC-15 380V/400V Rated Current A | 1.5 1.5 1.5 1.5 1.5 |
| DC-13 220V Rated Current A | 0.2 0.2 0.2 0.2 0.2 |
| Conductor Cross-sectional Area mm² | Main Circuit | Single-core or stranded wire 1~2.5 1~10 6~35 25~98 50~2×185 |
| | Terminal Screw M3.5 M4 M4 M8 M10 |
| Auxiliary Circuit | Single-core or stranded wire 1~2.5 1~2.5 1~2.5 1~2.5 1~2.5 |
| | Terminal Screw M3.5 M3.5 M3.5 M3.5 M3.5 |
