Function and Usage
The NB8LE-63 residual current circuit breaker is mainly applicable to the terminal distribution lines of commercial office buildings, residential buildings, and general industrial applications with an AC frequency of 50Hz, a rated voltage up to 400V, and a rated current up to 63A. It provides overload, short-circuit protection, and leakage protection for the line, and can also be used for infrequent switching operations under normal conditions.
Detailed Parameters
| Parameter Category | Parameter Item | Parameter Value |
|---|
| Product Model | | NB8LE-63 |
| Rated Current (A) | | 6, 10, 16, 20, 25, 32, 40, 50, 63 |
| Rated Residual Operating Current | General Type: | 0.03A, 0.05A, 0.1A, 0.3A |
| Time-Delay Type: | 0.05A, 0.1A, 0.3A |
| Leakage Protection Type | | A Type, AC Type |
| Operation Type | | General Type, Time-Delay Type |
| Rated Voltage (V) | | 230/400 |
| Rated Frequency (Hz) | | 50 |
| Pole Number | | 1P+N, 2P, 3P, 3P+N, 4P |
| Mechanical Life (Times) | | 20000 |
| Electrical Life (Times) | | 10000 |
| Rated Short-Circuit Breaking Capacity (A) | | 6000 |
| Running Short-Circuit Breaking Capacity (A) | | 6000 |
| Rated Insulation Voltage (V) | | 500 |
| Rated Impact Withstand Voltage (1.2/50) (kV) | | 4 |
| Dielectric Test Voltage (V) | | (50Hz, 1 minute) 2000 |
| Humidity and Heat Resistance (GB/T2423.4: 55°C/90~96%, 25°C/95~100%) | | 28 Cycle Cycles |
| Vibration Resistance (IEC/EN60068-2-6) | | Places without significant vibration and impact |
| Terminal Connection | Terminal Form | Frame Structure |
| Minimum Wire Cross-Section Area (mm²) | 1 |
| Maximum Wire Cross-Section Area (mm²) | 25 |
| Standard Connection Torque (N·m) | 2 |
| Maximum Allowable Torque (N·m) | 2.5 |
| Wire Insertion Depth (mm) | 13 |
| Reference Temperature (°C) | 30 |
| Operating Ambient Temperature (°C) | -35~+70 |
| Storage Ambient Temperature (°C) | -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 Rating | | V0 |
| Input Method | | Top Input |
| Installation Method | | TH35-7.5 Standard Rail |
| Pollution Level | | 2 |
| Protection Level | Direct Installation | IP20B |
| Installed in Distribution Box | IP40B |
| Modular Accessories | | S9, V9, XF9, XF9J, OVT-1, OUVT-1 |
