Functions and Applications
The NB8-63M single magnetic circuit breaker is mainly used in the terminal power distribution lines of commercial office buildings, residential buildings, and general industrial applications with AC 63A, providing short-circuit protection for the lines and also enabling infrequent switching operations under normal conditions.
Detailed Parameters
| Parameter Category | Parameter Item | Parameter Value |
|---|
| Product Model | | NB8-63M |
| Rated Current (A) | | 1, 2, 3, 4, 6, 10, 16, 20, 25, 32, 40, 50, 63 |
| Rated Voltage (V) | | 230/400 |
| Rated Frequency (Hz) | | 50 |
| Poles | | 1P, 2P, 3P, 4P |
| Mechanical Life (times) | | 20000 |
| Electrical Life (times) | | 10000 |
| Rated Short-Circuit Breaking Capacity (A) | | 10000 |
| Operational Short-Circuit Breaking Capacity (A) | | 7500 |
| Rated Insulation Voltage (V) | | 500 |
| Rated Impact Withstand Voltage (1.2/50) (kV) | | 6 |
| Dielectric Test Voltage (V) | | (50Hz, 1 minute) 2000 |
| Resistance to Humidity and Heat (GB/T2423.4: 55°C/90~96%, 25°C/95~100%) | | 28 cycles of circulation |
| Resistance to Vibration (IEC/EN60068-2-6) | | Places without significant vibration and impact |
| Terminal Connection | Terminal Form | Column-type Terminal |
| Minimum Conductor Cross-sectional Area (mm²) | 1 |
| Maximum Conductor Cross-sectional Area (mm²) | 25 |
| Standard Connection Torque (N·m) | 2 |
| Maximum Allowable Torque (N·m) | 2.5 |
| Conductor Insertion Depth (mm) | 13 |
| Reference Temperature (°C) | 30 |
| Operating Environmental Temperature (°C) | -35~+70 |
| Storage Environmental Temperature (°C) | -35~+85 |
| Applicable Altitude (m) | 2000 |
| Tripping Type | Magnetic Tripping |
| Magnetic Tripping Type | C Type (6.4ln~9.6ln) | ■ |
| D Type (9.6ln~14.4ln) | ■ |
| Enclosure Flammability Rating | | V0 |
| Input Method | | Top and Bottom Both |
| Installation Method | | TH35-7.5 Standard Rail |
| Pollution Degree | | 3 |
| Protection Level | Direct Installation | IP20B |
| Installed Inside Distribution Box | IP40B |
| Plug-in Accessories | | S9, V9, XF9, XF9J, OVT-1, OUVT-1 |
