Function and Application
The NU5-Ⅱ Surge Protective Device complies with GB/T 18802.11 standard. It is suitable for AC 50/60Hz, rated voltage of single-phase 230V / three-phase 400V power distribution and control systems, meeting SPD level II testing. It is used to suppress transient overvoltage below the equipment's withstand impulse overvoltage and discharge surge energy, thus protecting the system circuit and equipment. The main functional features of the surge protective device: it has L-PE, N-PE, L-N protection modes, suitable for various power grid systems; it has aging overheating protection, body degradation indication, and uses a plug-in structure, with optional remote alarm function.
Detailed Parameters
| Parameter Category | Parameter Item | Parameter Value |
|---|
| Basic Parameters and Technical Performance Indicators | Product Model | NU5-Ⅱ |
| Nominal Frequency (Hz) | 50/60 |
| Maximum Discharge Current Imax(kA) | 20, 40, 65, 80, 100, 120, 160 |
| Maximum Continuous Operating Voltage Uc(V) | 275, 385, 440, 275, 385, 440, 275, 385, 440, 275, 385, 440, 385, 440 |
| Rated Discharge Current In(kA) | 10, 20, 30, 40, 50, 60, 80 |
| Voltage Protection Level Up(kV) | 1.2, 1.6, 1.8, 1.5, 1.8, 2.0, 1.6, 2.0, 2.2, 1.8, 2.0, 2.2, 2.2, 2.4, 2.5, 2.8, 2.8, 3.0 |
| Poles | 1P, 1P+N, 2P, 3P, 3P+N, 4P |
| Connecting Conductor (mm²) | 4~25 |
| Tightening Torque (N·m) | 2.0 |
| Plug-in | Yes |
| Remote Signal Function | Optional |
