Function and Usage
The NB8LE-40 residual current circuit breaker is mainly suitable for AC 50Hz, rated voltage up to 230V, rated current up to 40A in commercial office buildings, residential buildings, and general industrial applications' terminal power distribution lines, providing overload, short-circuit protection, and leakage protection for the line. It can also be used for non-frequent switching operations under normal conditions.
Detailed Parameters
| Parameter Category | Parameter Item | Parameter Value |
|---|
| Product Model | | NB8LE-40 |
| Rated Current (A) | 6, 10, 16, 20, 25, 32, 40 |
| Rated Residual Operating Current | 0.03A |
| Leakage Protection Type | Type A, Type AC |
| Action Type | General Type |
| Rated Voltage (V) | 230 |
| Rated Frequency (Hz) | 50 |
| Poles | 1P+N |
| Mechanical Life (times) | 20000 |
| Electrical Life (times) | 10000 |
| Rated Short-Circuit Breaking Capacity (A) | 6000 |
| Operating Short-Circuit Breaking Capacity (A) | 6000 |
| Rated Insulation Voltage (V) | 500 |
| Rated Impulse Withstand Voltage (1.2/50) (kV) | 4 |
| Dielectric Test Voltage (V) | (50Hz, 1 minute) 2000 |
| Humidity and Heat Resistance (GB/T2423.4: 55℃/90~96%, 25℃/95~100%) | 28 Cycle Cycles |
| Vibration Resistance (IEC/EN60068-2-6) | No significant vibration and impact places |
| Wiring Terminal | Terminal Form | Frame Structure |
| Minimum Wire Cross-sectional Area (mm²) | 1 |
| Maximum Wire Cross-sectional Area (mm²) | 16 |
| Standard Connection Torque (N·m) | 1.2 |
| Maximum Allowable Torque (N·m) | 2 |
| Wire Insertion Depth (mm) | 10 |
| Reference Temperature (℃) | 30 |
| Operating Environmental Temperature (℃) | -35~+70 |
| Storage Environmental Temperature (℃) | -35~+85 |
| Applicable Altitude (m) | 2000 |
| Tripping Form | Thermal-magnetic Tripping |
| Electromagnetic Tripping Type | B Type (3In~5In) | ■ |
| C Type (5In~10In) | ■ |
| D Type (10In~16In) | |
| Enclosure Flame Retardant Grade | V0 |
| Input Method | Top Input |
| Installation Method | TH35-7.5 Standard Rail |
| Pollution Level | 2 |
| Protection Level | Directly Installed IP20B |
| | Installed in Distribution Box IP40B |
| Removable Accessories | S9, V9, XF9, XF9J, OVT-1, OUVT-1 |
