Function and Usage
The NB8LE-63H residual current operated circuit breaker is mainly applicable to the terminal power distribution lines of commercial office buildings, residential houses, and general industrial applications with AC 50Hz, rated voltage up to 230V, and rated current up to 63A. It provides overload, short-circuit protection, and residual current protection for the line. It can also perform infrequent switching operations under normal conditions.
Detailed Parameters
| Parameter Category | Parameter Item | Parameter Value |
|---|
| Product Model | | NB8LE-63H |
| Rated Current (A) | | 6, 10, 16, 20, 25, 32, 40, 50, 63 |
| Rated Residual Operating Current (mA) | | 0.03A |
| Residual Current Protection Type | | B type |
| Operation Type | | General type |
| Rated Voltage (V) | | AC230 |
| Rated Frequency (Hz) | | 50 |
| Number of Poles | | 2P |
| Mechanical Life (times) | | 20000 |
| Electrical Life (times) | | 10000 |
| Rated Short Circuit Breaking Capacity (A) | | 10000 |
| Running Short Circuit Breaking Capacity (A) | | 7500 |
| Rated Insulation Voltage (V) | | 500 |
| Rated Withstand Impulse Voltage (1.2/50) kV | | 4 |
| Dielectric Test Voltage (V) | | 2000 (50Hz) minutes |
| Resistance to Humidity and Heat (GB/T 2423.4 / 55℃ / 90%~96%, 25℃ / 95%~100%) | | 28 cycle cycles |
| Resistance to Vibration (IEC/EN 60068-2-6) | | Places without significant vibration and impact |
| Wiring Terminal | Wiring Terminal Type | Gu-style wiring terminal |
| Minimum Conductor Cross-sectional Area (mm²) | 1 |
| Maximum Conductor Cross-sectional Area (mm²) | 25 |
| Standard Connection Torque (N·m) | 2 |
| Maximum Acceptable Torque (N·m) | 2.0 |
| Conductor Insertion Depth (mm) | 13 |
| Reference Temperature (℃) | 30 |
| Operating Ambient Temperature (℃) | -35~+70 |
| Storage Ambient Temperature (℃) | -35~+85 |
| Altitude of Use (m) | ≤2000 |
| Tripping Form | Thermal-magnetic tripping |
| Electromagnetic Tripping Type (C type (5ln~10ln)) | |
| Enclosure Flammability Rating | V-0 |
| Input Method | Top Input |
| Installation Method | TH35-7.5 standard rail |
| Pollution Degree | 2 |
| Protection Level | Directly installed IP20B, installed in a distribution box IP40B |
| Removable Accessories | S9, V9, XF9, XF9J, OVT-1, OUVT-1 |
