Function and Application
Specifically used for the protection of low-voltage surge protective devices, solving the safety hazards that exist when traditional miniature circuit breakers or fuses are used as backup protection for surge protective devices. This series can cut off low short-circuit currents of more than 3A in an extremely short time, and can also cut off high short-circuit currents with amplitudes up to 100kA, greatly reducing the risk of fire of the surge protective device and improving the safety of use.
Detailed Parameters
| Parameter Category | Parameter Item | Parameter Value |
|---|
| Product Model | NXSCB-I+II | Test Category I and II for the matched SPD |
| | Rated Operating Voltage (V) AC230/400 |
| | Poles 1P, 2P, 3P, 4P |
| | Impulse Discharge Current Iimp(kA) 12.5 |
| | Rated Discharge Current In(kA) 40 |
| | Maximum Discharge Current Imax(kA) 80 |
| | Rated Short-Circuit Breaking Capacity Icn(kA) 100 |
| | Minimum Instantaneous Operation Current (I(A) 3 |
| | Voltage Protection Level Up(kV) 1.5 |
| | Protection Level IP20 |
| | Operating Environmental Temperature (℃) -40~+70 |
| NXSCB-II | Test Category II for the matched SPD |
| | Rated Operating Voltage (V) AC230/400 |
| | Poles 1P, 2P, 3P, 4P |
| | Impulse Discharge Current Iimp(kA) - |
| | Rated Discharge Current In(kA) 10 |
| | Maximum Discharge Current Imax(kA) 65 |
| | Rated Short-Circuit Breaking Capacity Icn(kA) 65, 100 |
| | Minimum Instantaneous Operation Current (I(A) 3 |
| | Voltage Protection Level Up(kV) 1.5 |
| | Protection Level IP20 |
| | Operating Environmental Temperature (℃) -40~+70 |
| Specialized Protection Device and SPD Selection Table | Product Model | Rated Short-Circuit Breaking Capacity (Icn) Compatible SPD Series |
| NXSCB-I+II 12.5H | 100kA NXU-I+II 12.5kA |
| NXSCB-I+II 15H | 100kA NXU-I+II 12.5kA |
| NXSCB-I+II 25H | 100kA Other limp 25kA and below surge protective devices |
| NXSCB-II 20 | 65kA NXU-II 20kA, NXU-II G 20kA |
| NXSCB-II 20H | 100kA NXU-II 20kA, NXU-II G 20kA |
| NXSCB-II 40 | 65kA NXU-II 40kA, NXU-II G 40kA |
| NXSCB-II 40H | 100kA NXU-II 40kA, NXU-II G 40kA |
| NXSCB-II 65 | 65kA NXU-II G 65kA |
| NXSCB-II 65H | 100kA NXU-II G 65kA |
| NXSCB-II 80 | 65kA Other Imax 80kA and below Type II Surge Protective Devices |
| NXSCB-II 80H | 100kA Other Imax 80kA and below Type II Surge Protective Devices |
| NXSCB-II 100 | 65kA NXU-II G 100kA |
| NXSCB-II 100H | 100kA NXU-II G 100kA |
| NXSCB-II 120 | 65kA NXU-II G 120kA |
| NXSCB-II 120H | 100kA NXU-II G 120kA |
