Function and Use
The NB8-63H Miniature Circuit Breaker is mainly applicable to the terminal distribution lines of commercial office buildings, residential buildings, and general industrial applications with AC 50Hz, rated voltage up to 63A, providing overload and short circuit protection for the lines, and can also perform non-frequent switching operations under normal conditions.
Detailed Parameters
| Parameter Category | Parameter Item | Parameter Value |
|---|
| Product Model | | NB8-63H |
| 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、1P+N、2P、3P、3P+N、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 Impulse Withstand Voltage (1.2/50) (kV) | | 6 |
| Dielectric Test Voltage (V) | | (50Hz, 1 minute) 2000 |
| Resistance to Humidity and Heat (GB/T2423.4: 55℃/90~96%, 25℃/95~100%) | | 28 Cycles |
| Resistance to Vibration (IEC/EN60068-2-6) | | Places without significant vibration and impact |
| Wiring Terminal | Terminal Form | Post-Type Terminal |
| 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 (℃) | | 30 |
| Operating Environmental Temperature (℃) | | -35~+70 |
| Storage Environmental Temperature (℃) | | -35~+85 |
| Applicable Altitude (m) | | 2000 |
| Tripping Type | | 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 and Bottom Both Possible |
| Installation Method | | TH35-7.5 Standard Rail |
| Pollution Level | | 3 |
| Protection Level | Direct Installation | IP20B |
| Installed in Distribution Box | IP40B |
| Removable Accessories | | S9、V9、XF9、XF9J、OVT-1、OUVT-1 |
